Articles | Volume 9, issue 3
https://doi.org/10.5194/se-9-629-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-9-629-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 May 2018
Research article |
| 09 May 2018
| 09 May 2018
Pseudotachylyte as field evidence for lower-crustal earthquakes during the intracontinental Petermann Orogeny (Musgrave Block, Central Australia)
Friedrich Hawemann
CORRESPONDING AUTHOR
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zürich, Switzerland
Neil S. Mancktelow
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zürich, Switzerland
Sebastian Wex
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zürich, Switzerland
Alfredo Camacho
Department of Geological Sciences, University of Manitoba, 125 Dysart Rd, Winnipeg, Manitoba, R3T 2N2, Canada
Giorgio Pennacchioni
Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padova, Italy
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Friedrich Hawemann, Neil Mancktelow, Sebastian Wex, Giorgio Pennacchioni, and Alfredo Camacho
Solid Earth, 10, 1635–1649, https://doi.org/10.5194/se-10-1635-2019, https://doi.org/10.5194/se-10-1635-2019, 2019
Sebastian Wex, Neil S. Mancktelow, Friedrich Hawemann, Alfredo Camacho, and Giorgio Pennacchioni
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Simone Masoch, Giorgio Pennacchioni, Michele Fondriest, Rodrigo Gomila, Piero Poli, José Cembrano, and Giulio Di Toro
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We investigate an exhumed hydrothermal system in the Atacama Desert (Chile) to understand how earthquake swarms form. Wall-rocks near fault-veins experienced high-stress pulses, and fault-veins underwent cyclic crack opening and shearing. These findings suggest ancient earthquake swarm activity, from dynamic crack propagation to repeated crack opening and shearing. This system represents a unique geological record of earthquake swarms, providing insight into their initiation and evolution.
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Metamorphic fine-grained reaction products make continental crust rocks weaker. Microstructural processes related to the transformation of strong K-feldspar into weak aggregates of plagioclase and quartz during crustal deformation have been investigated through electron microscopy. Rheological calculations show that the occurrence of even small amounts of weak aggregates, whose deformation is mainly diffusion-assisted, would lead to a decrease in rock viscosity of several orders of magnitude.
Sebastian Wex, Neil S. Mancktelow, Friedrich Hawemann, Alfredo Camacho, and Giorgio Pennacchioni
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Stefan Markus Schmalholz and Neil Sydney Mancktelow
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About 200 years ago in 1815 Sir James Hall made his famous analogue experiments, which showed probably for the first time that natural folds in ductile rock are the result of a horizontal compression. If such rocks are extended, then the rock layers can thin only locally, which is a process termed necking, and the resulting structure is often termed pinch-and-swell. We review here theoretical and experimental results on folding and necking on all geological scales.
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Driven magmatism and crustal thinning of coastal southern China in response to subduction
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Solid Earth, 15, 1281–1301, https://doi.org/10.5194/se-15-1281-2024, https://doi.org/10.5194/se-15-1281-2024, 2024
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Jeffrey M. Rahl, Brendan Moehringer, Kenneth S. Befus, and John S. Singleton
Solid Earth, 15, 1233–1240, https://doi.org/10.5194/se-15-1233-2024, https://doi.org/10.5194/se-15-1233-2024, 2024
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The Shanxi Rift is a young, active rift in northern China that formed atop a Proterozoic orogen. The impact of these structures on active rift faults is poorly understood. Here, we quantify the landscape response to active faulting and compare it with published maps of inherited structures. We find that inherited structures played an important role in the segmentation of the Shanxi Rift and in the development of rift interaction zones, which are the most active regions in the Shanxi Rift.
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Peter Achtziger-Zupančič, Alberto Ceccato, Alba Simona Zappone, Giacomo Pozzi, Alexis Shakas, Florian Amann, Whitney Maria Behr, Daniel Escallon Botero, Domenico Giardini, Marian Hertrich, Mohammadreza Jalali, Xiaodong Ma, Men-Andrin Meier, Julian Osten, Stefan Wiemer, and Massimo Cocco
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Maxime Jamet, Gregory Ballas, Roger Soliva, Olivier Gerbeaud, Thierry Lefebvre, Christine Leredde, and Didier Loggia
Solid Earth, 15, 895–920, https://doi.org/10.5194/se-15-895-2024, https://doi.org/10.5194/se-15-895-2024, 2024
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Simone Masoch, Giorgio Pennacchioni, Michele Fondriest, Rodrigo Gomila, Piero Poli, José Cembrano, and Giulio Di Toro
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We investigate an exhumed hydrothermal system in the Atacama Desert (Chile) to understand how earthquake swarms form. Wall-rocks near fault-veins experienced high-stress pulses, and fault-veins underwent cyclic crack opening and shearing. These findings suggest ancient earthquake swarm activity, from dynamic crack propagation to repeated crack opening and shearing. This system represents a unique geological record of earthquake swarms, providing insight into their initiation and evolution.
Anthony Adwan, Bertrand Maillot, Pauline Souloumiac, Christophe Barnes, Christophe Nussbaum, Meinert Rahn, and Thomas Van Stiphout
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We use computer simulations to study how stress is distributed in large-scale geological models, focusing on how fault lines behave under pressure. By running many 2D and 3D simulations with varying conditions, we discover patterns in how faults form and interact. Our findings reveal that even small changes in conditions can lead to different stress outcomes. This research helps us better understand earthquake mechanics and could improve predictions of fault behavior in real-world scenarios.
Matthew S. Hodge, Guri Venvik, Jochen Knies, Roelant van der Lelij, Jasmin Schönenberger, Øystein Nordgulen, Marco Brönner, Aziz Nasuti, and Giulio Viola
Solid Earth, 15, 589–615, https://doi.org/10.5194/se-15-589-2024, https://doi.org/10.5194/se-15-589-2024, 2024
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Smøla island, in the mid-Norwegian margin, has complex fracture and fault patterns resulting from tectonic activity. This study uses a multiple-method approach to unravel Smøla's tectonic history. We found five different phases of deformation related to various fracture geometries and minerals dating back hundreds of millions of years. 3D models of these features visualise these structures in space. This approach may help us to understand offshore oil and gas reservoirs hosted in the basement.
Júlia Gómez-Romeu and Nick Kusznir
Solid Earth, 15, 477–492, https://doi.org/10.5194/se-15-477-2024, https://doi.org/10.5194/se-15-477-2024, 2024
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We investigate the extensional fault geometry and its evolution during the stretching and thinning of continental crust and lithosphere leading to continental breakup. We focus on the fault-controlled processes that thin and rupture the final 10 km of continental crust at magma-poor margins prior to mantle exhumation. We show that isostatic fault rotation in response to extension is fundamental to understanding the formation of tectonic structures observed on seismic reflection data.
Karsten Reiter, Oliver Heidbach, and Moritz O. Ziegler
Solid Earth, 15, 305–327, https://doi.org/10.5194/se-15-305-2024, https://doi.org/10.5194/se-15-305-2024, 2024
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It is generally assumed that faults have an influence on the stress state of the Earth’s crust. It is questionable whether this influence is still present far away from a fault. Simple numerical models were used to investigate the extent of the influence of faults on the stress state. Several models with different fault representations were investigated. The stress fluctuations further away from the fault (> 1 km) are very small.
Yukinojo Koyama, Simon R. Wallis, and Takayoshi Nagaya
Solid Earth, 15, 143–166, https://doi.org/10.5194/se-15-143-2024, https://doi.org/10.5194/se-15-143-2024, 2024
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Stress along a subduction plate boundary is important for understanding subduction phenomena such as earthquakes. We estimated paleo-stress using quartz recrystallized grain size combined with deformation temperature and P–T paths of exhumed rocks. The obtained results show differential stresses of 30.8–82.7 MPa consistent over depths of 17–27 km in the paleo-subduction boundary. The obtained stress may represent the initial conditions under which slow earthquakes nucleated in the same domain.
Annelotte Weert, Kei Ogata, Francesco Vinci, Coen Leo, Giovanni Bertotti, Jerome Amory, and Stefano Tavani
Solid Earth, 15, 121–141, https://doi.org/10.5194/se-15-121-2024, https://doi.org/10.5194/se-15-121-2024, 2024
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On the road to a sustainable planet, geothermal energy is considered one of the main substitutes when it comes to heating. The geological history of an area can have a major influence on the application of these geothermal systems, as demonstrated in the West Netherlands Basin. Here, multiple episodes of rifting and subsequent basin inversion have controlled the distribution of the reservoir rocks, thus influencing the locations where geothermal energy can be exploited.
Pâmela C. Richetti, Frank Zwaan, Guido Schreurs, Renata S. Schmitt, and Timothy C. Schmid
Solid Earth, 14, 1245–1266, https://doi.org/10.5194/se-14-1245-2023, https://doi.org/10.5194/se-14-1245-2023, 2023
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The Araripe Basin in NE Brazil was originally formed during Cretaceous times, as South America and Africa broke up. The basin is an important analogue to offshore South Atlantic break-up basins; its sediments were uplifted and are now found at 1000 m height, allowing for studies thereof, but the cause of the uplift remains debated. Here we ran a series of tectonic laboratory experiments that show how a specific plate tectonic configuration can explain the evolution of the Araripe Basin.
Adam J. Cawood, Hannah Watkins, Clare E. Bond, Marian J. Warren, and Mark A. Cooper
Solid Earth, 14, 1005–1030, https://doi.org/10.5194/se-14-1005-2023, https://doi.org/10.5194/se-14-1005-2023, 2023
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Here we test conceptual models of fracture development by investigating fractures across multiple scales. We find that most fractures increase in abundance towards the fold hinge, and we interpret these as being fold related. Other fractures at the site show inconsistent orientations and are unrelated to fold formation. Our results show that predicting fracture patterns requires the consideration of multiple geologic variables.
Johanna Heeb, David Healy, Nicholas E. Timms, and Enrique Gomez-Rivas
Solid Earth, 14, 985–1003, https://doi.org/10.5194/se-14-985-2023, https://doi.org/10.5194/se-14-985-2023, 2023
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Hydration of rocks is a key process in the Earth’s crust and mantle that is accompanied by changes in physical traits and mechanical behaviour of rocks. This study assesses the influence of stress on hydration reaction kinetics and mechanics in experiments on anhydrite. We show that hydration occurs readily under stress and results in localized hydration along fractures and mechanic weakening. New gypsum growth is selective and depends on the stress field and host anhydrite crystal orientation.
Roy Helge Gabrielsen, Panagiotis Athanasios Giannenas, Dimitrios Sokoutis, Ernst Willingshofer, Muhammad Hassaan, and Jan Inge Faleide
Solid Earth, 14, 961–983, https://doi.org/10.5194/se-14-961-2023, https://doi.org/10.5194/se-14-961-2023, 2023
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The Barents Shear Margin defines the border between the relatively shallow Barents Sea that is situated on a continental plate and the deep ocean. This margin's evolution history was probably influenced by plate tectonic reorganizations. From scaled experiments, we deduced several types of structures (faults, folds, and sedimentary basins) that help us to improve the understanding of the history of the opening of the North Atlantic.
Leslie Logan, Ervin Veress, Joel B. H. Andersson, Olof Martinsson, and Tobias E. Bauer
Solid Earth, 14, 763–784, https://doi.org/10.5194/se-14-763-2023, https://doi.org/10.5194/se-14-763-2023, 2023
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The Pahtohavare Cu ± Au deposits in the Kiruna mining district have a dubious timing of formation and have not been contextualized within an up-to-date tectonic framework. Structural mapping was carried out to reveal that the deposits are hosted in brittle structures that cut a noncylindrical, SE-plunging anticline constrained to have formed during the late-Svecokarelian orogeny. These results show that Cu ± Au mineralization formed more than ca. 80 Myr after iron oxide–apatite mineralization.
Alexandra Tamas, Dan M. Tamas, Gabor Tari, Csaba Krezsek, Alexandru Lapadat, and Zsolt Schleder
Solid Earth, 14, 741–761, https://doi.org/10.5194/se-14-741-2023, https://doi.org/10.5194/se-14-741-2023, 2023
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Tectonic processes are complex and often difficult to understand due to the limitations of surface or subsurface data. One such process is inversion tectonics, which means that an area initially developed in an extension (such as the opening of an ocean) is reversed to compression (the process leading to mountain building). In this research, we use a laboratory method (analogue modelling), and with the help of a sandbox, we try to better understand structures (folds/faults) related to inversion.
Elizabeth Parker Wilson, Pablo Granado, Pablo Santolaria, Oriol Ferrer, and Josep Anton Muñoz
Solid Earth, 14, 709–739, https://doi.org/10.5194/se-14-709-2023, https://doi.org/10.5194/se-14-709-2023, 2023
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This work focuses on the control of accommodation zones on extensional and subsequent inversion in salt-detached domains using sandbox analogue models. During extension, the transfer zone acts as a pathway for the movement of salt, changing the expected geometries. When inverted, the salt layer and syn-inversion sedimentation control the deformation style in the salt-detached cover system. Three natural cases are compared to the model results and show similar inversion geometries.
Oriol Ferrer, Eloi Carola, and Ken McClay
Solid Earth, 14, 571–589, https://doi.org/10.5194/se-14-571-2023, https://doi.org/10.5194/se-14-571-2023, 2023
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Using an experimental approach based on scaled sandbox models, this work aims to understand how salt above different rotational fault blocks influences the cover geometry and evolution, first during extension and then during inversion. The results show that inherited salt structures constrain contractional deformation. We show for the first time how welds and fault welds are reopened during contractional deformation, having direct implications for the subsurface exploration of natural resources.
Chiara Montemagni, Stefano Zanchetta, Martina Rocca, Igor M. Villa, Corrado Morelli, Volkmar Mair, and Andrea Zanchi
Solid Earth, 14, 551–570, https://doi.org/10.5194/se-14-551-2023, https://doi.org/10.5194/se-14-551-2023, 2023
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The Vinschgau Shear Zone (VSZ) is one of the largest and most significant shear zones developed within the Late Cretaceous thrust stack in the Austroalpine domain of the eastern Alps. 40Ar / 39Ar geochronology constrains the activity of the VSZ between 97 and 80 Ma. The decreasing vorticity towards the core of the shear zone, coupled with the younging of mylonites, points to a shear thinning behavior. The deepest units of the Eo-Alpine orogenic wedge were exhumed along the VSZ.
Jordi Miró, Oriol Ferrer, Josep Anton Muñoz, and Gianreto Manastchal
Solid Earth, 14, 425–445, https://doi.org/10.5194/se-14-425-2023, https://doi.org/10.5194/se-14-425-2023, 2023
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Using the Asturian–Basque–Cantabrian system and analogue (sandbox) models, this work focuses on the linkage between basement-controlled and salt-decoupled domains and how deformation is accommodated between the two during extension and subsequent inversion. Analogue models show significant structural variability in the transitional domain, with oblique structures that can be strongly modified by syn-contractional sedimentation. Experimental results are consistent with the case study.
Junichi Fukuda, Takamoto Okudaira, and Yukiko Ohtomo
Solid Earth, 14, 409–424, https://doi.org/10.5194/se-14-409-2023, https://doi.org/10.5194/se-14-409-2023, 2023
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We measured water distributions in deformed quartz by infrared spectroscopy mapping and used the results to discuss changes in water distribution resulting from textural development. Because of the grain size reduction process (dynamic recrystallization), water contents decrease from 40–1750 wt ppm in host grains of ~2 mm to 100–510 wt ppm in recrystallized regions composed of fine grains of ~10 µm. Our results indicate that water is released and homogenized by dynamic recrystallization.
Bastien Walter, Yves Géraud, Alexiane Favier, Nadjib Chibati, and Marc Diraison
EGUsphere, https://doi.org/10.5194/egusphere-2023-397, https://doi.org/10.5194/egusphere-2023-397, 2023
Preprint archived
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Lake Abhe in southwestern Djibouti is known for its exposures of massive hydrothermal chimneys and hot springs on the lake’s eastern shore. This study highlights the control of the main structural faults of the area on the development of these hydrothermal features. This work contributes to better understand hydrothermal fluid pathways in this area and may help further exploration for the geothermal development of this remarkable site.
Michael Rudolf, Matthias Rosenau, and Onno Oncken
Solid Earth, 14, 311–331, https://doi.org/10.5194/se-14-311-2023, https://doi.org/10.5194/se-14-311-2023, 2023
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Analogue models of tectonic processes rely on the reproduction of their geometry, kinematics and dynamics. An important property is fault behaviour, which is linked to the frictional characteristics of the fault gouge. This is represented by granular materials, such as quartz sand. In our study we investigate the time-dependent frictional properties of various analogue materials and highlight their impact on the suitability of these materials for analogue models focusing on fault reactivation.
Jessica Barabasch, Joyce Schmatz, Jop Klaver, Alexander Schwedt, and Janos L. Urai
Solid Earth, 14, 271–291, https://doi.org/10.5194/se-14-271-2023, https://doi.org/10.5194/se-14-271-2023, 2023
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We analysed Zechstein salt with microscopes and observed specific microstructures that indicate much faster deformation in rock salt with fine halite grains when compared to salt with larger grains. This is important because people build large cavities in the subsurface salt for energy storage or want to deposit radioactive waste inside it. When engineers and scientists use grain-size data and equations that include this mechanism, it will help to make better predictions in geological models.
Nicolás Molnar and Susanne Buiter
Solid Earth, 14, 213–235, https://doi.org/10.5194/se-14-213-2023, https://doi.org/10.5194/se-14-213-2023, 2023
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Progression of orogenic wedges over pre-existing extensional structures is common in nature, but deciphering the spatio-temporal evolution of deformation from the geological record remains challenging. Our laboratory experiments provide insights on how horizontal stresses are transferred across a heterogeneous crust, constrain which pre-shortening conditions can either favour or hinder the reactivatation of extensional structures, and explain what implications they have on critical taper theory.
Tania Habel, Martine Simoes, Robin Lacassin, Daniel Carrizo, and German Aguilar
Solid Earth, 14, 17–42, https://doi.org/10.5194/se-14-17-2023, https://doi.org/10.5194/se-14-17-2023, 2023
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The Central Andes are one of the most emblematic reliefs on Earth, but their western flank remains understudied. Here we explore two rare key sites in the hostile conditions of the Atacama desert to build cross-sections, quantify crustal shortening, and discuss the timing of this deformation at ∼20–22°S. We propose that the structures of the Western Andes accommodated significant crustal shortening here, but only during the earliest stages of mountain building.
Naïm Célini, Frédéric Mouthereau, Abdeltif Lahfid, Claude Gout, and Jean-Paul Callot
Solid Earth, 14, 1–16, https://doi.org/10.5194/se-14-1-2023, https://doi.org/10.5194/se-14-1-2023, 2023
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We investigate the peak temperature of sedimentary rocks of the SW Alps (France), using Raman spectroscopy on carbonaceous material. This method provides an estimate of the peak temperature achieved by organic-rich rocks. To determine the timing and the tectonic context of the origin of these temperatures we use 1D thermal modelling. We find that the high temperatures up to 300 °C were achieved during precollisional extensional events, not during tectonic burial in the Western Alps.
Luke N. J. Wedmore, Tess Turner, Juliet Biggs, Jack N. Williams, Henry M. Sichingabula, Christine Kabumbu, and Kawawa Banda
Solid Earth, 13, 1731–1753, https://doi.org/10.5194/se-13-1731-2022, https://doi.org/10.5194/se-13-1731-2022, 2022
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Mapping and compiling the attributes of faults capable of hosting earthquakes are important for the next generation of seismic hazard assessment. We document 18 active faults in the Luangwa Rift, Zambia, in an active fault database. These faults are between 9 and 207 km long offset Quaternary sediments, have scarps up to ~30 m high, and are capable of hosting earthquakes from Mw 5.8 to 8.1. We associate the Molaza Fault with surface ruptures from two unattributed M 6+ 20th century earthquakes.
Michał P. Michalak, Lesław Teper, Florian Wellmann, Jerzy Żaba, Krzysztof Gaidzik, Marcin Kostur, Yuriy P. Maystrenko, and Paulina Leonowicz
Solid Earth, 13, 1697–1720, https://doi.org/10.5194/se-13-1697-2022, https://doi.org/10.5194/se-13-1697-2022, 2022
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When characterizing geological/geophysical surfaces, various geometric attributes are calculated, such as dip angle (1D) or dip direction (2D). However, the boundaries between specific values may be subjective and without optimization significance, resulting from using default color palletes. This study proposes minimizing cosine distance among within-cluster observations to detect 3D anomalies. Our results suggest that the method holds promise for identification of megacylinders or megacones.
Erik M. Young, Christie D. Rowe, and James D. Kirkpatrick
Solid Earth, 13, 1607–1629, https://doi.org/10.5194/se-13-1607-2022, https://doi.org/10.5194/se-13-1607-2022, 2022
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Studying how earthquakes spread deep within the faults they originate from is crucial to improving our understanding of the earthquake process. We mapped preserved ancient earthquake surfaces that are now exposed in South Africa and studied their relationship with the shape and type of rocks surrounding them. We determined that these surfaces are not random and are instead associated with specific kinds of rocks and that their shape is linked to the evolution of the faults in which they occur.
Sivaji Lahiri, Kitty L. Milliken, Peter Vrolijk, Guillaume Desbois, and Janos L. Urai
Solid Earth, 13, 1513–1539, https://doi.org/10.5194/se-13-1513-2022, https://doi.org/10.5194/se-13-1513-2022, 2022
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Understanding the mechanism of mechanical compaction is important. Previous studies on mechanical compaction were mostly done by performing experiments. Studies on natural rocks are rare due to compositional heterogeneity of the sedimentary succession with depth. Due to remarkable similarity in composition and grain size, the Sumatra subduction complex provides a unique opportunity to study the micromechanism of mechanical compaction on natural samples.
Dongwon Lee, Nikolaos Karadimitriou, Matthias Ruf, and Holger Steeb
Solid Earth, 13, 1475–1494, https://doi.org/10.5194/se-13-1475-2022, https://doi.org/10.5194/se-13-1475-2022, 2022
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This research article focuses on filtering and segmentation methods employed in high-resolution µXRCT studies for crystalline rocks, bearing fractures, or fracture networks, of very small aperture. Specifically, we focus on the identification of artificially induced (via quenching) fractures in Carrara marble samples. Results from the same dataset from all five different methods adopted were produced and compared with each other in terms of their output quality and time efficiency.
Alberto Ceccato, Giulia Tartaglia, Marco Antonellini, and Giulio Viola
Solid Earth, 13, 1431–1453, https://doi.org/10.5194/se-13-1431-2022, https://doi.org/10.5194/se-13-1431-2022, 2022
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The Earth's surface is commonly characterized by the occurrence of fractures, which can be mapped, and their can be geometry quantified on digital representations of the surface at different scales of observation. Here we present a series of analytical and statistical tools, which can aid the quantification of fracture spatial distribution at different scales. In doing so, we can improve our understanding of how fracture geometry and geology affect fluid flow within the fractured Earth crust.
Giulio Viola, Giovanni Musumeci, Francesco Mazzarini, Lorenzo Tavazzani, Manuel Curzi, Espen Torgersen, Roelant van der Lelij, and Luca Aldega
Solid Earth, 13, 1327–1351, https://doi.org/10.5194/se-13-1327-2022, https://doi.org/10.5194/se-13-1327-2022, 2022
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A structural-geochronological approach helps to unravel the Zuccale Fault's architecture. By mapping its internal structure and dating some of its fault rocks, we constrained a deformation history lasting 20 Myr starting at ca. 22 Ma. Such long activity is recorded by now tightly juxtaposed brittle structural facies, i.e. different types of fault rocks. Our results also have implications on the regional evolution of the northern Apennines, of which the Zuccale Fault is an important structure.
Wan-Lin Hu
Solid Earth, 13, 1281–1290, https://doi.org/10.5194/se-13-1281-2022, https://doi.org/10.5194/se-13-1281-2022, 2022
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Having a seismic image is generally expected to enable us to better determine fault geometry and thus estimate geological slip rates accurately. However, the process of interpreting seismic images may introduce unintended uncertainties, which have not yet been widely discussed. Here, a case of a shear fault-bend fold in the frontal Himalaya is used to demonstrate how differences in interpretations can affect the following estimates of slip rates and dependent conclusions.
Manuel D. Menzel, Janos L. Urai, Estibalitz Ukar, Thierry Decrausaz, and Marguerite Godard
Solid Earth, 13, 1191–1218, https://doi.org/10.5194/se-13-1191-2022, https://doi.org/10.5194/se-13-1191-2022, 2022
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Mantle rocks can bind large quantities of carbon by reaction with CO2, but this capacity requires fluid pathways not to be clogged by carbonate. We studied mantle rocks from Oman to understand the mechanisms allowing their transformation into carbonate and quartz. Using advanced imaging techniques, we show that abundant veins were essential fluid pathways driving the reaction. Our results show that tectonic stress was important for fracture opening and a key ingredient for carbon fixation.
Jean-Baptiste P. Koehl, Steffen G. Bergh, and Arthur G. Sylvester
Solid Earth, 13, 1169–1190, https://doi.org/10.5194/se-13-1169-2022, https://doi.org/10.5194/se-13-1169-2022, 2022
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The San Andreas fault is a major active fault associated with ongoing earthquake sequences in southern California. The present study investigates the development of the Indio Hills area in the Coachella Valley along the main San Andreas fault and the Indio Hills fault. The Indio Hills area is located near an area with high ongoing earthquake activity (Brawley seismic zone), and, therefore, its recent tectonic evolution has implications for earthquake prediction.
Jin Lai, Dong Li, Yong Ai, Hongkun Liu, Deyang Cai, Kangjun Chen, Yuqiang Xie, and Guiwen Wang
Solid Earth, 13, 975–1002, https://doi.org/10.5194/se-13-975-2022, https://doi.org/10.5194/se-13-975-2022, 2022
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(1) Structural diagenesis analysis is performed on the ultra-deep tight sandstone. (2) Fracture and intergranular pores are related to the low in situ stress magnitudes. (3) Dissolution is associated with the presence of fracture.
Hamed Fazlikhani, Wolfgang Bauer, and Harald Stollhofen
Solid Earth, 13, 393–416, https://doi.org/10.5194/se-13-393-2022, https://doi.org/10.5194/se-13-393-2022, 2022
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Interpretation of newly acquired FRANKEN 2D seismic survey data in southeeastern Germany shows that upper Paleozoic low-grade metasedimentary rocks and possible nappe units are transported by Variscan shear zones to ca. 65 km west of the Franconian Fault System (FFS). We show that the locations of post-Variscan upper Carboniferous–Permian normal faults and associated graben and half-graben basins are controlled by the geometry of underlying Variscan shear zones.
Xiaodong Ma, Marian Hertrich, Florian Amann, Kai Bröker, Nima Gholizadeh Doonechaly, Valentin Gischig, Rebecca Hochreutener, Philipp Kästli, Hannes Krietsch, Michèle Marti, Barbara Nägeli, Morteza Nejati, Anne Obermann, Katrin Plenkers, Antonio P. Rinaldi, Alexis Shakas, Linus Villiger, Quinn Wenning, Alba Zappone, Falko Bethmann, Raymi Castilla, Francisco Seberto, Peter Meier, Thomas Driesner, Simon Loew, Hansruedi Maurer, Martin O. Saar, Stefan Wiemer, and Domenico Giardini
Solid Earth, 13, 301–322, https://doi.org/10.5194/se-13-301-2022, https://doi.org/10.5194/se-13-301-2022, 2022
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Questions on issues such as anthropogenic earthquakes and deep geothermal energy developments require a better understanding of the fractured rock. Experiments conducted at reduced scales but with higher-resolution observations can shed some light. To this end, the BedrettoLab was recently established in an existing tunnel in Ticino, Switzerland, with preliminary efforts to characterize realistic rock mass behavior at the hectometer scale.
Berit Schwichtenberg, Florian Fusseis, Ian B. Butler, and Edward Andò
Solid Earth, 13, 41–64, https://doi.org/10.5194/se-13-41-2022, https://doi.org/10.5194/se-13-41-2022, 2022
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Hydraulic rock properties such as porosity and permeability are relevant factors that have an impact on groundwater resources, geological repositories and fossil fuel reservoirs. We investigate the influence of chemical compaction upon the porosity evolution in salt–biotite mixtures and related transport length scales by conducting laboratory experiments in combination with 4-D analysis. Our observations invite a renewed discussion of the effect of sheet silicates on chemical compaction.
David Healy and Stephen Paul Hicks
Solid Earth, 13, 15–39, https://doi.org/10.5194/se-13-15-2022, https://doi.org/10.5194/se-13-15-2022, 2022
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The energy transition requires operations in faulted rocks. To manage the technical challenges and public concern over possible induced earthquakes, we need to quantify the risks. We calculate the probability of fault slip based on uncertain inputs, stresses, fluid pressures, and the mechanical properties of rocks in fault zones. Our examples highlight the specific gaps in our knowledge. Citizen science projects could produce useful data and include the public in the discussions about hazards.
Manuel I. de Paz-Álvarez, Thomas G. Blenkinsop, David M. Buchs, George E. Gibbons, and Lesley Cherns
Solid Earth, 13, 1–14, https://doi.org/10.5194/se-13-1-2022, https://doi.org/10.5194/se-13-1-2022, 2022
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We describe a virtual geological mapping course implemented in response to travelling and social restrictions derived from the ongoing COVID-19 pandemic. The course was designed to replicate a physical mapping exercise as closely as possible with the aid of real field data and photographs collected by the authors during previous years in the Cantabrian Zone (NW Spain). The course is delivered through Google Earth via a KMZ file with outcrop descriptions and links to GitHub-hosted photographs.
Yueyang Xia, Jacob Geersen, Dirk Klaeschen, Bo Ma, Dietrich Lange, Michael Riedel, Michael Schnabel, and Heidrun Kopp
Solid Earth, 12, 2467–2477, https://doi.org/10.5194/se-12-2467-2021, https://doi.org/10.5194/se-12-2467-2021, 2021
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The 2 June 1994 Java tsunami earthquake ruptured in a seismically quiet subduction zone and generated a larger-than-expected tsunami. Here, we re-process a seismic line across the rupture area. We show that a subducting seamount is located up-dip of the mainshock in a region that did not rupture during the earthquake. Seamount subduction modulates the topography of the marine forearc and acts as a seismic barrier in the 1994 earthquake rupture.
Steffen Abe and Hagen Deckert
Solid Earth, 12, 2407–2424, https://doi.org/10.5194/se-12-2407-2021, https://doi.org/10.5194/se-12-2407-2021, 2021
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We use numerical simulations and laboratory experiments on rock samples to investigate how stress conditions influence the geometry and roughness of fracture surfaces. The roughness of the surfaces was analyzed in terms of absolute roughness and scaling properties. The results show that the surfaces are self-affine but with different scaling properties between the numerical models and the real rock samples. Results suggest that stress conditions have little influence on the surface roughness.
Chao Deng, Rixiang Zhu, Jianhui Han, Yu Shu, Yuxiang Wu, Kefeng Hou, and Wei Long
Solid Earth, 12, 2327–2350, https://doi.org/10.5194/se-12-2327-2021, https://doi.org/10.5194/se-12-2327-2021, 2021
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This study uses seismic reflection data to interpret the geometric relationship and evolution of intra-basement and rift-related structures in the Enping sag in the northern South China Sea. Our observations suggest the primary control of pre-existing thrust faults is the formation of low-angle normal faults, with possible help from low-friction materials, and the significant role of pre-existing basement thrust faults in fault geometry, paleotopography, and syn-rift stratigraphy of rift basins.
Cited articles
Aitken, A. and Betts, P.: Constraints on the Proterozoic supercontinent cycle from the structural evolution of the south-central Musgrave Province, central Australia, Precambrian Res., 168, 284–300, https://doi.org/10.1016/j.precamres.2008.10.006, 2009.
Aitken, A. R. A., Smithies, R. H., Dentith, M. C., Joly, A., Evans, S., and Howard, H. M.: Magmatism-dominated intracontinental rifting in the Mesoproterozoic: the Ngaanyatjarra Rift, central Australia, Gondwana Res., 24, 886–901, https://doi.org/10.1016/j.gr.2012.10.003, 2013.
Altenberger, U., Prosser, G., Ruggiero, M., and Gunter, C.: Microstructure and petrology of a Calabrian garnet-bearing pseudotachylyte – a link to lower-crustal seismicity, Geol. Soc. Spec. Publ., 359, 153–168, https://doi.org/10.1144/SP359.9, 2011.
Altenberger, U., Prosser, G., Grande, A., Günter, C., and Langone, A.: A seismogenic zone in the deep crust indicated by pseudotachylytes and ultramylonites in granulite-facies rocks of Calabria (Southern Italy), Contrib. Mineral. Petr., 166, 975–994, https://doi.org/10.1007/s00410-013-0904-3, 2013.
Austrheim, H.: Fluid and deformation induced metamorphic processes around Moho beneath continent collision zones: examples from the exposed root zone of the Caledonian mountain belt, W-Norway, Tectonophysics, 609, 620–635, https://doi.org/10.1016/j.tecto.2013.08.030, 2013.
Austrheim, H. and Boundy, T. M.: Pseudotachylytes generated during seismic faulting and eclogitization of the deep crust, Science, 265, 82–83, https://doi.org/10.1126/science.265.5168.82, 1994.
Austrheim, H., Erambert, M., and Boundy, T. M.: Garnets recording deep crustal earthquakes, Earth Planet. Sc. Lett., 139, 223–238, https://doi.org/10.1016/0012-821X(95)00232-2, 1996.
Austrheim, H., Dunkel, K. G., Plümper, O., Ildefonse, B., Liu, Y., and Jamtveit, B.: Fragmentation of wall rock garnets during deep crustal earthquakes, Science Advances, 3, e1602067, https://doi.org/10.1126/sciadv.1602067, 2017.
Burov, E. B. and Watts, A. B.: The long-term strength of continental lithosphere: “jelly sandwich” or “crème brûlée”?, GSA Today, 16, 4, https://doi.org/10.1130/1052-5173(2006)016<4:TLTSOC>2.0.CO;2, 2006.
Camacho, A. and Fanning, C. M.: Some isotopic constraints on the evolution of the granulite and upper amphibolite facies terranes in the eastern Musgrave Block, central Australia, Precambrian Res., 71, 155–181, 1995.
Camacho, A. and McDougall, I.: Intracratonic, strike-slip partitioned transpression and the formation and exhumation of eclogite facies rocks: an example from the Musgrave Block, central Australia, Tectonics, 19, 978–996, 2000.
Camacho, A., Vernon, R. H., and Fitz Gerald, J. D.: Large volumes of anhydrous pseudotachylyte in the Woodroffe Thrust, eastern Musgrave Ranges, Australia, J. Struct. Geol., 17, 371–383, 1995.
Camacho, A., Compston, W., McCulloch, M., and McDougall, I.: Timing and exhumation of eclogite facies shear zones, Musgrave Block, central Australia, J. Metamorph. Geol., 15, 735–751, 1997.
Clarke, G. L. and Norman, A. R.: Generation of pseudotachylite under granulite facies conditions, and its preservation during cooling, J. Metamorph. Geol., 11, 319–335, https://doi.org/10.1111/j.1525-1314.1993.tb00151.x, 1993.
Connolly, J. A. D.: Multivariable phase diagrams; an algorithm based on generalized thermodynamics, Am. J. Sci., 290, 666–718, https://doi.org/10.2475/ajs.290.6.666, 1990.
Deichmann, N. and Rybach, L.: Earthquakes and temperatures in the lower crust below the northern Alpine foreland of Switzerland, Properties and processes of earth's lower crust, Geoph. Monog. Series, 51, 197–213, 1989.
Di Toro, G. and Pennacchioni, G.: Superheated friction-induced melts in zoned pseudotachylytes within the Adamello tonalites (Italian Southern Alps), J. Struct. Geol., 26, 1783–1801, https://doi.org/10.1016/j.jsg.2004.03.001, 2004.
Duputel, Z., Vergne, J., Rivera, L., Wittlinger, G., Farra, V., and Hetényi, G.: The 2015 Gorkha earthquake: a large event illuminating the Main Himalayan Thrust fault, Geophys. Res. Lett., 43, 2517–2525, https://doi.org/10.1002/2016GL068083, 2016.
Edgoose, C. J., Close, D. F., and Scrimgeour, I.: Australia 1:250 000 geological series, Sheet SG 52-7, Northern Territory Department of Mines and Energy, Darwin, NT, Australia, 1999.
Ellis, D. J. and Maboko, M. A. H.: Precambrian tectonics and the physicochemical evolution of the continental crust. I. The gabbro-eclogite transition revisited, Precambrian Res., 55, 491–506, 1992.
Ellis, S. and Stöckhert, B.: Elevated stresses and creep rates beneath the brittle-ductile transition caused by seismic faulting in the upper crust, J. Geophys. Res., 109, B05407, https://doi.org/10.1029/2003JB002744, 2004.
Evins, P. M., Smithies, R. H., Howard, H. M., Kirkland, C. L., Wingate, M. T. D., and Bodorkos, S.: Redefining the Giles Event within the setting of the 1120–1020 Ma Ngaanyatjarra Rift, West Musgrave Province, central Australia, Geological Society of Western Australia, East Perth, W.A., 2010.
Fitz Gerald, J. D., Mancktelow, N. S., Pennacchioni, G., and Kunze, K.: Ultrafine-grained quartz mylonites from high-grade shear zones: evidence for strong dry middle to lower crust, Geology, 34, 369, https://doi.org/10.1130/G22099.1, 2006.
Förster, H.-J. and Harlov, D. E.: Monazite-(Ce)–huttonite solid solutions in granulite-facies metabasites from the Ivrea–Verbano Zone, Italy, Mineral. Mag., 63, 587–587, 1999.
Geological Survey of South Australia: Dataset SA_RAD_TH, Thorium map of South Australia, Adelaide, SA, Australia, 2011.
Glikson, A. Y. and Australian Geological Survey Organisation (Eds.): Geology of the western Musgrave Block, central Australia, with particular reference to the mafic-ultramafic Giles Complex, Australian Govt. Pub. Service, Canberra, 1996.
Goetze, C. and Evans, B.: Stress and temperature in the bending lithosphere as constrained by experimental rock mechanics, Geophys. J. Int., 59, 463–478, 1979.
Gray, C. M.: Geochronology of granulite-facies gneisses in the western Musgrave Block, central Australia, J. Geol. Soc. Aust., 25, 403–414, https://doi.org/10.1080/00167617808729050, 1978.
Handy, M. and Brun, J.-P.: Seismicity, structure and strength of the continental lithosphere, Earth Planet. Sc. Lett., 223, 427–441, https://doi.org/10.1016/j.epsl.2004.04.021, 2004.
Hobbs, B. E., Ord, A. and Teyssier, C.: Earthquakes in the Ductile Regime?, PAGEOPH, 124, 309–336, 1986.
Holland, T. J. B. and Powell, R.: An internally consistent thermodynamic data set for phases of petrological interest, J. Metamorph. Geol., 16, 309–343, 1998.
Jackson, J.: Faulting, flow, and the strength of the continental lithosphere, Int. Geol. Rev., 44, 39–61, 2002a.
Jackson, J.: Strength of the continental lithosphere: time to abandon the jelly sandwich?, GSA Today, 12, 4–9, https://doi.org/10.1130/1052-5173(2002)012<0004:SOTCLT>2.0.CO;2, 2002b.
Jackson, J. A., Austrheim, H., McKenzie, D., and Priestley, K.: Metastability, mechanical strength, and the support of mountain belts, Geology, 32, 625–628, 2004.
John, T., Medvedev, S., Rüpke, L. H., Andersen, T. B., Podladchikov, Y. Y., and Austrheim, H.: Generation of intermediate-depth earthquakes by self-localizing thermal runaway, Nat. Geosci., 2, 137–140, https://doi.org/10.1038/ngeo419, 2009.
Kirkpatrick, J. D. and Rowe, C. D.: Disappearing ink: how pseudotachylytes are lost from the rock record, J. Struct. Geol., 52, 183–198, https://doi.org/10.1016/j.jsg.2013.03.003, 2013.
Kohlstedt, D. L., Evans, B., and Mackwell, S. J.: Strength of the lithosphere: constraints imposed by laboratory experiments, J. Geophys. Res.-Sol. Ea., 100, 17587–17602, https://doi.org/10.1029/95JB01460, 1995.
Lambert, I. B. and Heier, K. S.: Geochemical investigations of deep-seated rocks in the Australian shield, Lithos, 1, 30–53, https://doi.org/10.1016/S0024-4937(68)80033-7, 1968.
Lanari, P., Vidal, O., De Andrade, V., Dubacq, B., Lewin, E., Grosch, E. G., and Schwartz, S.: XMapTools: a MATLAB©-based program for electron microprobe X-ray image processing and geothermobarometry, Comput. Geosci., 62, 227–240, https://doi.org/10.1016/j.cageo.2013.08.010, 2014.
Li, Z.-X. and Evans, D. A.: Late Neoproterozoic 40 intraplate rotation within Australia allows for a tighter-fitting and longer-lasting Rodinia, Geology, 39, 39–42, 2011.
Lin, A., Maruyama, T., Aaron, S., Michibayashi, K., Camacho, A., and Kano, K.: Propagation of seismic slip from brittle to ductile crust: evidence from pseudotachylyte of the Woodroffe thrust, central Australia, Tectonophysics, 402, 21–35, https://doi.org/10.1016/j.tecto.2004.10.016, 2005.
Lund, M. G. and Austrheim, H.: High-pressure metamorphism and deep-crustal seismicity: evidence from contemporaneous formation of pseudotachylytes and eclogite facies coronas, Tectonophysics, 372, 59–83, https://doi.org/10.1016/S0040-1951(03)00232-4, 2003.
Maddock, R. H., Grocott, J., and Van Nes, M.: Vesicles, amygdales and similar structures in fault-generated pseudotachylytes, Lithos, 20, 419–432, 1987.
Major, R. B. and Conor, C. H. H.: The Musgrave Block, in: The Geology of South Australia, Vol. 1. The Precambrian, edited by: Drexel, J. F., Preiss, W. P., and Parker, A. J., Geological Survey of South Australia, Adelaide, SA, Australia, Bulletin 54, 156–167, 1993.
McKenzie, D. and Brune, J. N.: Melting on fault planes during large earthquakes, Geophys. J. Int., 29, 65–78, 1972.
Menegon, L., Nasipuri, P., Stünitz, H., Behrens, H., and Ravna, E.: Dry and strong quartz during deformation of the lower crust in the presence of melt, J. Geophys. Res., 116, B10410, https://doi.org/10.1029/2011JB008371, 2011.
Menegon, L., Pennacchioni, G., Malaspina, N., Harris, K., and Wood, E.: Earthquakes as precursors of ductile shear zones in the dry and strong lower crust, Geochem. Geophy. Geosy., 4356–4374, https://doi.org/10.1002/2017GC007189, 2017.
Milligan, P. R. and Nakamura, A.: Total Magnetic Intensity (TMI) image 2015 greyscale, Geoscience Australia, Canberra, ACT, Australia, 2015.
Mitra, S., Priestley, K., Bhattacharyya, A. K., and Gaur, V. K.: Crustal structure and earthquake focal depths beneath northeastern India and southern Tibet: crustal structure beneath NE India, Geophys. J. Int., 160, 227–248, https://doi.org/10.1111/j.1365-246X.2004.02470.x, 2004.
Moecher, D. P. and Steltenpohl, M. G.: Direct calculation of rupture depth for an exhumed paleoseismogenic fault from mylonitic pseudotachylyte, Geology, 37, 999–1002, 2009.
Moecher, D. P. and Steltenpohl, M. G.: Petrological evidence for co-seismic slip in extending middle-lower continental crust: Heier's zone of pseudotachylyte, north Norway, Geol. Soc. Spec. Publ., 359, 169–186, https://doi.org/10.1144/SP359.10, 2011.
Orlandini, O., Mahan, K. H., Regan, S., Williams, M. L., and Leite, A.: Pseudotachylytes of the deep crust: examples from a granulite-facies shear zone, AGU Fall Meeting Abstracts, T53C–2606, Moscone Center, San Francisco, USA, 2013.
Pennacchioni, G. and Cesare, B.: Ductile-brittle transition in pre-Alpine amphibolite facies mylonites during evolution from water-present to water-deficient conditions (Mont Mary nappe, Italian Western Alps), J. Metamorph. Geol., 15, 777–791, 1997.
Pittarello, L., Pennacchioni, G., and Di Toro, G.: Amphibolite-facies pseudotachylytes in Premosello metagabbro and felsic mylonites (Ivrea Zone, Italy), Tectonophysics, 580, 43–57, https://doi.org/10.1016/j.tecto.2012.08.001, 2012.
Price, N. A., Johnson, S. E., Gerbi, C. C., and West, D. P.: Identifying deformed pseudotachylyte and its influence on the strength and evolution of a crustal shear zone at the base of the seismogenic zone, Tectonophysics, 518–521, 63–83, https://doi.org/10.1016/j.tecto.2011.11.011, 2012.
Rao, N. P., Tsukuda, T., Kosuga, M., Bhatia, S. C., and Suresh, G.: Deep lower crustal earthquakes in central India: inferences from analysis of regional broadband data of the 1997 May 21, Jabalpur earthquake, Geophys. J. Int., 148, 132–138, 2002.
Reyners, M., Eberhart-Phillips, D., and Stuart, G.: The role of fluids in lower-crustal earthquakes near continental rifts, Nature, 446, 1075–1078, https://doi.org/10.1038/nature05743, 2007.
Scharbert, P. D. H. G., Korkisch, P. D. J., and Steffan, D. I.: Uranium, thorium and potassium in granulite facies rocks, Bohemian Massif, Lower Austria, Austria, Tscher. Miner. Petrog., 23, 223–232, https://doi.org/10.1007/BF01083102, 1976.
Sclater, J. G., Jaupart, C., and Galson, D.: The heat flow through oceanic and continental crust and the heat loss of the Earth, Rev. Geophys., 18, 269, https://doi.org/10.1029/RG018i001p00269, 1980.
Scrimgeour, I. R. and Close, D. F.: Regional high-pressure metamorphism during intracratonic deformation: the Petermann Orogeny, central Australia, J. Metamorp. Geol., 17, 557–572, 1999.
Sibson, R. H.: Generation of pseudotachylyte by ancient seismic faulting, Geophys. J. Int., 43, 775–794, 1975.
Sibson, R. H.: Transient discontinuities in ductile shear zones, J. Struct. Geol., 2, 165–171, 1980.
Sibson, R. H. and Toy, V. G.: The habitat of fault-generated pseudotachylyte: presence vs. absence of friction-melt, in: Geophysical Monograph Series, vol. 170, edited by: Abercrombie, R., McGarr, A., Kanamori, H., and Di Toro, G., American Geophysical Union, Washington, DC, 153–166, 2006.
Singer, J., Diehl, T., Husen, S., Kissling, E., and Duretz, T.: Alpine lithosphere slab rollback causing lower crustal seismicity in northern foreland, Earth Planet. Sc. Lett., 397, 42–56, https://doi.org/10.1016/j.epsl.2014.04.002, 2014.
Smithies, R. H., Howard, H. M., Evins, P. M., Kirkland, C. L., Kelsey, D. E., Hand, M., Wingate, M. T. D., Collins, A. S., and Belousova, E.: High-temperature granite magmatism, crust-mantle interaction and the mesoproterozoic intracontinental evolution of the Musgrave province, central Australia, J. Petrol., 52, 931–958, https://doi.org/10.1093/petrology/egr010, 2011.
Steltenpohl, M. G., Kassos, G., and Andresen, A.: Retrograded eclogite-facies pseudotachylytes as deep-crustal paleoseismic faults within continental basement of Lofoten, north Norway, Geosphere, 2, 61–72, https://doi.org/10.1130/GES00035.1, 2006.
Thielmann, M., Rozel, A., Kaus, B. J. P., and Ricard, Y.: Intermediate-depth earthquake generation and shear zone formation caused by grain size reduction and shear heating, Geology, 43, 791–794, https://doi.org/10.1130/G36864.1, 2015.
Trepmann, C. A. and Stöckhert, B.: Cataclastic deformation of garnet: a record of synseismic loading and postseismic creep, J. Struct. Geol., 24, 1845–1856, https://doi.org/10.1016/S0191-8141(02)00004-4, 2002.
Ueda, T., Obata, M., Di Toro, G., Kanagawa, K., and Ozawa, K.: Mantle earthquakes frozen in mylonitized ultramafic pseudotachylytes of spinel-lherzolite facies, Geology, 36, 607, https://doi.org/10.1130/G24739A.1, 2008.
Wade, B. P., Barovich, K. M., Hand, M., Scrimgeour, I. R., and Close, D. F.: Evidence for early Mesoproterozoic arc magmatism in the Musgrave Block, central Australia: implications for Proterozoic crustal growth and tectonic reconstructions of Australia, J. Geol., 114, 43–63, 2006.
Wenk, H. R. and Weiss, L. E.: Al-rich calcic pyroxene in pseudotachylyte: an indicator of high pressure and high temperature?, Tectonophysics, 84, 329–341, 1982.
Wex, S., Mancktelow, N. S., Hawemann, F., Camacho, A., and Pennacchioni, G.: Geometry of a large-scale, low-angle, mid-crustal thrust (Woodroffe Thrust, central Australia), Tectonics, 36, 2447–2476, https://doi.org/10.1002/2017TC004681, 2017.
Whitney, D. L. and Evans, B. W.: Abbreviations for names of rock-forming minerals, American Mineralogist, 95, 185–187, https://doi.org/10.2138/am.2010.3371, 2010.
White, J. C.: Transient discontinuities revisited: pseudotachylyte, plastic instability and the influence of low pore fluid pressure on deformation processes in the mid-crust, J. Struct. Geol., 18, 1471–1486, 1996.
White, J. C.: Instability and localization of deformation in lower crust granulites, Minas fault zone, Nova Scotia, Canada, Geol. Soc. Spec. Publ., 224, 25–37, https://doi.org/10.1144/GSL.SP.2004.224.01.03, 2004.
White, J. C.: Paradoxical pseudotachylyte – fault melt outside the seismogenic zone, J. Struct. Geol., 38, 11–20, https://doi.org/10.1016/j.jsg.2011.11.016, 2012.
Xu, Y., Roecker, S. W., Wei, R.-P., Zhang, W.-L., and Wei, B.: Analysis of seismic activity in the crust from earthquake relocation in the central Tien Shan, Chinese J. Geophys., 48, 1388–1396, 2005.
Zhao, J., McCulloch, M., and Korsch, R. J.: Characterisation of a plume-related ∼ 800 Ma magmatic event and its implications for basin formation in central-southern Australia, Earth Planet. Sc. Lett., 121, 349–367, 1994.
