Articles | Volume 9, issue 1
https://doi.org/10.5194/se-9-223-2018
© 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-9-223-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Feb 2018
Research article |
| 27 Feb 2018
| 27 Feb 2018
Structural disorder of graphite and implications for graphite thermometry
Martina Kirilova
CORRESPONDING AUTHOR
Department of Geology, University of Otago, P.O. Box 56, Dunedin 9054,
New Zealand
Virginia Toy
Department of Geology, University of Otago, P.O. Box 56, Dunedin 9054,
New Zealand
Jeremy S. Rooney
Department of Chemistry, University of Otago, P.O. Box 56, Dunedin
9054, New Zealand
Carolina Giorgetti
Dipartimento di Scienze della Terra, Università degli Studi La
Sapienza, Rome, Italy
Keith C. Gordon
Department of Chemistry, University of Otago, P.O. Box 56, Dunedin
9054, New Zealand
Cristiano Collettini
Dipartimento di Scienze della Terra, Università degli Studi La
Sapienza, Rome, Italy
Toru Takeshita
Faculty of Science, Earth and Planetary Sciences, Hokkaido
University, Sapporo, Japan
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Martina Kirilova, Virginia Toy, Katrina Sauer, François Renard, Klaus Gessner, Richard Wirth, Xianghui Xiao, and Risa Matsumura
Solid Earth, 11, 2425–2438, https://doi.org/10.5194/se-11-2425-2020, https://doi.org/10.5194/se-11-2425-2020, 2020
Short summary
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Processes associated with open pores can change the physical properties of rocks and cause earthquakes. In borehole samples from the Alpine Fault zone, we show that many pores in these rocks were filled by weak materials that can slide easily. The amount of open spaces was thus reduced, and fluids circulating within them built up high pressures. Both weak materials and high pressures within pores reduce the rock strength; thus the state of pores here can trigger the next Alpine Fault earthquake.
Matthew S. Tarling, Matteo Demurtas, Steven A. F. Smith, Jeremy S. Rooney, Marianne Negrini, Cecilia Viti, Jasmine R. Petriglieri, and Keith C. Gordon
Eur. J. Mineral., 34, 285–300, https://doi.org/10.5194/ejm-34-285-2022, https://doi.org/10.5194/ejm-34-285-2022, 2022
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Rocks containing the serpentine mineral lizardite occur in many tectonic settings. Knowing the crystal orientation of lizardite in these rocks tells us how they deform and gives insights into their physical properties. The crystal orientation of lizardite is challenging to obtain using standard techniques. To overcome this challenge, we developed a method using Raman spectroscopy to map the crystal orientation of lizardite with minimal preparation on standard thin sections.
Hamed Amiri, Francesco Cappuccio, Mai-Linh Doan, Marianne Conin, and Virginia Toy
Solid Earth Discuss., https://doi.org/10.5194/se-2021-150, https://doi.org/10.5194/se-2021-150, 2022
Publication in SE not foreseen
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In March 2011, the Mw ~9 Tohoku-oki earthquake, one of the largest seismic events ever recorded, occurred across a megathrust fault in the west of the Japan trench. This devastating earthquake stressed the need for more detailed studies on the fault zone behavior and the main causes of this event.
Martina Kirilova, Virginia Toy, Katrina Sauer, François Renard, Klaus Gessner, Richard Wirth, Xianghui Xiao, and Risa Matsumura
Solid Earth, 11, 2425–2438, https://doi.org/10.5194/se-11-2425-2020, https://doi.org/10.5194/se-11-2425-2020, 2020
Short summary
Short summary
Processes associated with open pores can change the physical properties of rocks and cause earthquakes. In borehole samples from the Alpine Fault zone, we show that many pores in these rocks were filled by weak materials that can slide easily. The amount of open spaces was thus reduced, and fluids circulating within them built up high pressures. Both weak materials and high pressures within pores reduce the rock strength; thus the state of pores here can trigger the next Alpine Fault earthquake.
Bernhard Schuck, Anja M. Schleicher, Christoph Janssen, Virginia G. Toy, and Georg Dresen
Solid Earth, 11, 95–124, https://doi.org/10.5194/se-11-95-2020, https://doi.org/10.5194/se-11-95-2020, 2020
Fabio Trippetta, Patrizio Petricca, Andrea Billi, Cristiano Collettini, Marco Cuffaro, Anna Maria Lombardi, Davide Scrocca, Giancarlo Ventura, Andrea Morgante, and Carlo Doglioni
Solid Earth, 10, 1555–1579, https://doi.org/10.5194/se-10-1555-2019, https://doi.org/10.5194/se-10-1555-2019, 2019
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Considering all mapped faults in Italy, empirical scaling laws between fault dimensions and earthquake magnitude are used at the national scale. Results are compared with earthquake catalogues. The consistency between our results and the catalogues gives credibility to the method. Some large differences between the two datasets suggest the validation of this experiment elsewhere.
Matthew S. Tarling, Steven A. F. Smith, James M. Scott, Jeremy S. Rooney, Cecilia Viti, and Keith C. Gordon
Solid Earth, 10, 1025–1047, https://doi.org/10.5194/se-10-1025-2019, https://doi.org/10.5194/se-10-1025-2019, 2019
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Shear zones dominated by hydrated mantle rocks (serpentinites) occur in many tectonic settings around the world. To better understand the internal structure, composition and possible mechanical behaviour of these shear zones, we performed a detailed field, petrological and microanalytical study of the Livingstone Fault in New Zealand. We propose a conceptual model to account for the main physical and chemical processes that control deformation in large serpentinite shear zones.
Steven B. Kidder, Virginia G. Toy, David J. Prior, Timothy A. Little, Ashfaq Khan, and Colin MacRae
Solid Earth, 9, 1123–1139, https://doi.org/10.5194/se-9-1123-2018, https://doi.org/10.5194/se-9-1123-2018, 2018
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By quantifying trace concentrations of titanium in quartz (a known geologic “thermometer”), we constrain the temperature profile for the deep crust along the Alpine Fault. We show there is a sharp change from fairly uniform temperatures at deep levels to a very steep gradient in temperature in the upper kilometers of the crust.
Jack N. Williams, Virginia G. Toy, Cécile Massiot, David D. McNamara, Steven A. F. Smith, and Steven Mills
Solid Earth, 9, 469–489, https://doi.org/10.5194/se-9-469-2018, https://doi.org/10.5194/se-9-469-2018, 2018
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We present new data on the orientation of fractures, their fill, and their density around the Alpine Fault, a plate boundary fault on the South Island of New Zealand. Fractures < 160 m of the fault are filled and show a range of orientations, whilst fractures at greater distances (< 500 m) are open and parallel to the rock's mechanical weakness. We interpret the latter fracture set to reflect near-surface processes, whilst the latter are potentially linked to deep-seated Alpine Fault seismicity.
Jack N. Williams, Joseph J. Bevitt, and Virginia G. Toy
Sci. Dril., 22, 35–42, https://doi.org/10.5194/sd-22-35-2017, https://doi.org/10.5194/sd-22-35-2017, 2017
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We compare images of drillcore from the Alpine Fault in New Zealand that were collected using X-ray computed tomography (CT) and neutron tomography (NT). Both techniques provide 3-D images of the core's internal structure, which would not be possible through visual analysis alone. We find that CT scans are more beneficial, as they can image a wider range of rock types, and this scanning technique is more practical. Nevertheless, NT provides complementary scans over limited intervals of core.
J. Shervais, J. Evans, V. Toy, J. Kirkpatrick, A. Clarke, and J. Eichelberger
Sci. Dril., 18, 19–33, https://doi.org/10.5194/sd-18-19-2014, https://doi.org/10.5194/sd-18-19-2014, 2014
L. Chiaraluce, C. Collettini, M. Cattaneo, and G. Monachesi
Sci. Dril., 17, 31–35, https://doi.org/10.5194/sd-17-31-2014, https://doi.org/10.5194/sd-17-31-2014, 2014
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Importance of basement faulting and salt decoupling for the structural evolution of the Fars Arc (Zagros fold-and-thrust belt): a numerical modeling approach
On the role of trans-lithospheric faults in the long-term seismotectonic segmentation of active margins: a case study in the Andes
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(D)rifting in the 21st century: key processes, natural hazards, and geo-resources
Interseismic and long-term deformation of southeastern Sicily driven by the Ionian slab roll-back
Rift and plume: a discussion on active and passive rifting mechanisms in the Afro-Arabian rift based on synthesis of geophysical data
Propagating rifts: the roles of crustal damage and ascending mantle fluids
Magma-poor continent–ocean transition zones of the southern North Atlantic: a wide-angle seismic synthesis of a new frontier
Cretaceous–Paleocene extension at the southwestern continental margin of India and opening of the Laccadive basin: constraints from geophysical data
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This work investigates how strike-slip faults propagate across domains with lateral contrasting brittle strength using analogue models. The introduction of brittle vertical domains was achieved using quartz microbead sand. The reference vertical domains influence synthetic fault propagation, segmentation, and linkage, as well as the antithetic faults which rotate about a vertical axis due to the applied simple shear. The results aligned with the faults in the NW of the Iberian Peninsula.
Fatemeh Gomar, Jonas B. Ruh, Mahdi Najafi, and Farhad Sobouti
Solid Earth, 15, 1479–1507, https://doi.org/10.5194/se-15-1479-2024, https://doi.org/10.5194/se-15-1479-2024, 2024
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Our study investigates the structural evolution of the Fars Arc in the Zagros Mountains through numerical modeling. We focus on the effects of the interaction between basement faults and salt décollement levels during tectonic inversion, including a rifting and a convergence phase. In conclusion, our results emphasize the importance of considering fault geometry, salt rheology, and basement involvement in understanding the resistance to deformation and the seismic behavior of fold–thrust belts.
Gonzalo Yanez C., Jose Piquer R., and Orlando Rivera H.
Solid Earth, 15, 1319–1342, https://doi.org/10.5194/se-15-1319-2024, https://doi.org/10.5194/se-15-1319-2024, 2024
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We postulate that the observed spatial distribution of large earthquakes in active convergence zones, organised in segments where large events are repeated every 100–300 years, depends on large-scale continental faults and fluid release from the subducting slab. In order to support this model, we use proxies at different spatial and temporal scales (historic seismicity, megathrust slip solutions, inter-seismic cumulative seismicity, GPS/viscous plate coupling, and coastline morphology).
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Solid Earth, 15, 1265–1279, https://doi.org/10.5194/se-15-1265-2024, https://doi.org/10.5194/se-15-1265-2024, 2024
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We investigate the along-strike variation in volcanics on the Pelotas segment of the Brazilian margin created during continental breakup and formation of the southern South Atlantic. We show that the volume of volcanics strongly controls the amount of space available for post-breakup sedimentation. We also show that breakup varies along-strike from very magma-rich to magma-normal within a relatively short distance of less than 300 km. This is not as expected from a simple mantle plume model.
Moritz O. Ziegler, Robin Seithel, Thomas Niederhuber, Oliver Heidbach, Thomas Kohl, Birgit Müller, Mojtaba Rajabi, Karsten Reiter, and Luisa Röckel
Solid Earth, 15, 1047–1063, https://doi.org/10.5194/se-15-1047-2024, https://doi.org/10.5194/se-15-1047-2024, 2024
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The rotation of the principal stress axes in a fault structure because of a rock stiffness contrast has been investigated for the impact of the ratio of principal stresses, the angle between principal stress axes and fault strike, and the ratio of the rock stiffness contrast. A generic 2D geomechanical model is employed for the systematic investigation of the parameter space.
Frank Zwaan, Tiago M. Alves, Patricia Cadenas, Mohamed Gouiza, Jordan J. J. Phethean, Sascha Brune, and Anne C. Glerum
Solid Earth, 15, 989–1028, https://doi.org/10.5194/se-15-989-2024, https://doi.org/10.5194/se-15-989-2024, 2024
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Rifting and the break-up of continents are key aspects of Earth’s plate tectonic system. A thorough understanding of the geological processes involved in rifting, and of the associated natural hazards and resources, is of great importance in the context of the energy transition. Here, we provide a coherent overview of rift processes and the links with hazards and resources, and we assess future challenges and opportunities for (collaboration between) researchers, government, and industry.
Amélie Viger, Stéphane Dominguez, Stéphane Mazzotti, Michel Peyret, Maxime Henriquet, Giovanni Barreca, Carmelo Monaco, and Adrien Damon
Solid Earth, 15, 965–988, https://doi.org/10.5194/se-15-965-2024, https://doi.org/10.5194/se-15-965-2024, 2024
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New satellite geodetic data (PS-InSAR) evidence a generalized subsidence and an eastward tilting of southeastern Sicily combined with a local relative uplift along its eastern coast. We perform flexural and elastic modeling and show that the slab pull force induced by the Ionian slab roll-back and extrado deformation reproduce the measured surface deformation. Finally, we propose an original seismic cycle model that is mainly driven by the southward migration of the Ionian slab roll-back.
Ran Issachar, Peter Haas, Nico Augustin, and Jörg Ebbing
Solid Earth, 15, 807–826, https://doi.org/10.5194/se-15-807-2024, https://doi.org/10.5194/se-15-807-2024, 2024
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In this contribution, we explore the causal relationship between the arrival of the Afar plume and the initiation of the Afro-Arabian rift. We mapped the rift architecture in the triple-junction region using geophysical data and reviewed the available geological data. We interpret a progressive development of the plume–rift system and suggest an interaction between active and passive mechanisms in which the plume provided a push force that changed the kinematics of the associated plates.
Folarin Kolawole and Rasheed Ajala
Solid Earth, 15, 747–762, https://doi.org/10.5194/se-15-747-2024, https://doi.org/10.5194/se-15-747-2024, 2024
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We investigate the upper-crustal structure of the Rukwa–Tanganyika rift zone in East Africa, where the Tanganyika rift interacts with the Rukwa and Mweru-Wantipa rifts, coinciding with abundant seismicity at the rift tips. Seismic velocity structure and patterns of seismicity clustering reveal zones around 10 km deep with anomalously high Vp / Vs ratios at the rift tips, indicative of a localized mechanically weakened crust caused by mantle volatiles and damage associated with bending strain.
J. Kim Welford
Solid Earth, 15, 683–710, https://doi.org/10.5194/se-15-683-2024, https://doi.org/10.5194/se-15-683-2024, 2024
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I present a synthesis of the continent–ocean boundaries of the southern North Atlantic Ocean, as probed using seismic methods for rock velocity estimation, to assess their deep structures from the crust to the upper mantle and to discuss how they were formed. With this knowledge, it is possible to start evaluating these regions of the Earth for their capacity to produce hydrogen and critical minerals and to store excess carbon dioxide, all with the goal of greening our economy.
Mathews George Gilbert, Parakkal Unnikrishnan, and Munukutla Radhakrishna
Solid Earth, 15, 671–682, https://doi.org/10.5194/se-15-671-2024, https://doi.org/10.5194/se-15-671-2024, 2024
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The study identifies evidence for extension south of Tellicherry Arch along the southwestern continental margin of India through the integrated analysis of multichannel seismic and gravity data. The sediment deposition pattern indicates that this extension occurred after the Eocene. We further propose that the anticlockwise rotation of India and the passage of the Réunion plume have facilitated the opening of the Laccadive basin.
Hong-Xiang Wu, Han-Lin Chen, Andrew V. Zuza, Yildirim Dilek, Du-Wei Qiu, Qi-Ye Lu, Feng-Qi Zhang, Xiao-Gan Cheng, and Xiu-Bin Lin
EGUsphere, https://doi.org/10.5194/egusphere-2024-1670, https://doi.org/10.5194/egusphere-2024-1670, 2024
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The Tethyan Orogenic Belt documents an extensive history of subduction along the southern margin of Eurasia. This study examines the stratigraphy and provenance of Jurassic strata in the West Kunlun Mountains, highlighting the alternating extensional and contractional tectonic episodes in this region. We interpret that this complex evolution was related to the northward subduction of the Neo-Tethys Ocean, transitioning from southward retreat to northward flat-slab advancement.
Ana Fonseca, Simon Nachtergaele, Amed Bonilla, Stijn Dewaele, and Johan De Grave
Solid Earth, 15, 329–352, https://doi.org/10.5194/se-15-329-2024, https://doi.org/10.5194/se-15-329-2024, 2024
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This study explores the erosion and exhumation processes and history of early continental crust hidden within the Amazonian Rainforest. This crust forms part of the Amazonian Craton, an ancient continental fragment. Our surprising findings reveal the area underwent rapid early Cretaceous exhumation triggered by tectonic forces. This discovery challenges the traditional perception that cratons are stable and long-lived entities and shows they can deform readily under specific geological contexts.
Mengdan Chen, Changxin Yin, Danling Chen, Long Tian, Liang Liu, and Lei Kang
Solid Earth, 15, 215–227, https://doi.org/10.5194/se-15-215-2024, https://doi.org/10.5194/se-15-215-2024, 2024
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Stishovite remains stable under mantle conditions and can incorporate various amounts of water in its crystal structure. We provide a systematic review of previous studies on water in stishovite and propose a new model for water solubility of Al-bearing stishovite. Calculation results based on this model suggest that stishovite may effectively accommodate water from the breakdown of hydrous minerals and could make an important contribution to water enrichment in the mantle transition zone.
Eszter Békési, Jan-Diederik van Wees, Kristóf Porkoláb, Mátyás Hencz, and Márta Berkesi
EGUsphere, https://doi.org/10.5194/egusphere-2024-308, https://doi.org/10.5194/egusphere-2024-308, 2024
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We present a workflow to model the temperature distribution within the lithosphere of sedimentary basins and apply it to NW Hungary. The model can reproduce the thermal evolution through basin formation, making use of temperature measurements from wells. Models provide key input to constrain geodynamic processes and geo-energy resource potential.
Tiago M. Alves
Solid Earth, 15, 39–62, https://doi.org/10.5194/se-15-39-2024, https://doi.org/10.5194/se-15-39-2024, 2024
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Alpine tectonic inversion is reviewed for southwestern Iberia, known for its historical earthquakes and tsunamis. High-quality 2D seismic data image 26 faults mapped to a depth exceeding 10 km. Normal faults accommodated important vertical uplift and shortening. They are 100–250 km long and may generate earthquakes with Mw > 8.0. Regions of Late Mesozoic magmatism comprise thickened, harder crust, forming lateral buttresses to compression and promoting the development of fold-and-thrust belts.
Marine Larrey, Frédéric Mouthereau, Damien Do Couto, Emmanuel Masini, Anthony Jourdon, Sylvain Calassou, and Véronique Miegebielle
Solid Earth, 14, 1221–1244, https://doi.org/10.5194/se-14-1221-2023, https://doi.org/10.5194/se-14-1221-2023, 2023
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Extension leading to the formation of ocean–continental transition can be highly oblique to the main direction of crustal thinning. Here we explore the case of a continental margin exposed in the Betics that developed in a back-arc setting perpendicular to the direction of the retreating Gibraltar subduction. We show that transtension is the main mode of crustal deformation that led to the development of metamorphic domes and extensional intramontane basins.
Sören Tholen, Jolien Linckens, and Gernold Zulauf
Solid Earth, 14, 1123–1154, https://doi.org/10.5194/se-14-1123-2023, https://doi.org/10.5194/se-14-1123-2023, 2023
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Intense phase mixing with homogeneously distributed secondary phases and irregular grain boundaries and shapes indicates that metasomatism formed the microstructures predominant in the shear zone of the NW Ronda peridotite. Amphibole presence, olivine crystal orientations, and the consistency to the Beni Bousera peridotite (Morocco) point to OH-bearing metasomatism by small fractions of evolved melts. Results confirm a strong link between reactions and localized deformation in the upper mantle.
Anindita Samsu, Weronika Gorczyk, Timothy Chris Schmid, Peter Graham Betts, Alexander Ramsay Cruden, Eleanor Morton, and Fatemeh Amirpoorsaeed
Solid Earth, 14, 909–936, https://doi.org/10.5194/se-14-909-2023, https://doi.org/10.5194/se-14-909-2023, 2023
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When a continent is pulled apart, it breaks and forms a series of depressions called rift basins. These basins lie above weakened crust that is then subject to intense deformation during subsequent tectonic compression. Our analogue experiments show that when a system of basins is squeezed in a direction perpendicular to the main trend of the basins, some basins rise up to form mountains while others do not.
Frank Zwaan and Guido Schreurs
Solid Earth, 14, 823–845, https://doi.org/10.5194/se-14-823-2023, https://doi.org/10.5194/se-14-823-2023, 2023
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The East African Rift System (EARS) is a major plate tectonic feature splitting the African continent apart. Understanding the tectonic processes involved is of great importance for societal and economic reasons (natural hazards, resources). Laboratory experiments allow us to simulate these large-scale processes, highlighting the links between rotational plate motion and the overall development of the EARS. These insights are relevant when studying other rift systems around the globe as well.
Anna-Katharina Sieberer, Ernst Willingshofer, Thomas Klotz, Hugo Ortner, and Hannah Pomella
Solid Earth, 14, 647–681, https://doi.org/10.5194/se-14-647-2023, https://doi.org/10.5194/se-14-647-2023, 2023
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Through analogue models and field observations, we investigate how inherited platform–basin geometries control strain localisation, style, and orientation of reactivated and new structures during inversion. Our study shows that the style of evolving thrusts and their changes along-strike are controlled by pre-existing rheological discontinuities. The results of this study are relevant for understanding inversion structures in general and for the European eastern Southern Alps in particular.
Thorben Schöfisch, Hemin Koyi, and Bjarne Almqvist
Solid Earth, 14, 447–461, https://doi.org/10.5194/se-14-447-2023, https://doi.org/10.5194/se-14-447-2023, 2023
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A magnetic fabric analysis provides information about the reorientation of magnetic grains and is applied to three sandbox models that simulate different stages of basin inversion. The analysed magnetic fabrics reflect the different developed structures and provide insights into the different deformed stages of basin inversion. It is a first attempt of applying magnetic fabric analyses to basin inversion sandbox models but shows the possibility of applying it to such models.
Timothy Chris Schmid, Sascha Brune, Anne Glerum, and Guido Schreurs
Solid Earth, 14, 389–407, https://doi.org/10.5194/se-14-389-2023, https://doi.org/10.5194/se-14-389-2023, 2023
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Continental rifts form by linkage of individual rift segments and disturb the regional stress field. We use analog and numerical models of such rift segment interactions to investigate the linkage of deformation and stresses and subsequent stress deflections from the regional stress pattern. This local stress re-orientation eventually causes rift deflection when multiple rift segments compete for linkage with opposingly propagating segments and may explain rift deflection as observed in nature.
Thomas B. Phillips, John B. Naliboff, Ken J. W. McCaffrey, Sophie Pan, Jeroen van Hunen, and Malte Froemchen
Solid Earth, 14, 369–388, https://doi.org/10.5194/se-14-369-2023, https://doi.org/10.5194/se-14-369-2023, 2023
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Continental crust comprises bodies of varying strength, formed through numerous tectonic events. When subject to extension, these areas produce distinct rift and fault systems. We use 3D models to examine how rifts form above
strongand
weakareas of crust. We find that faults become more developed in weak areas. Faults are initially stopped at the boundaries with stronger areas before eventually breaking through. We relate our model observations to rift systems globally.
Marion Roger, Arjan de Leeuw, Peter van der Beek, Laurent Husson, Edward R. Sobel, Johannes Glodny, and Matthias Bernet
Solid Earth, 14, 153–179, https://doi.org/10.5194/se-14-153-2023, https://doi.org/10.5194/se-14-153-2023, 2023
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We study the construction of the Ukrainian Carpathians with LT thermochronology (AFT, AHe, and ZHe) and stratigraphic analysis. QTQt thermal models are combined with burial diagrams to retrieve the timing and magnitude of sedimentary burial, tectonic burial, and subsequent exhumation of the wedge's nappes from 34 to ∼12 Ma. Out-of-sequence thrusting and sediment recycling during wedge building are also identified. This elucidates the evolution of a typical wedge in a roll-back subduction zone.
Frank Zwaan, Guido Schreurs, Susanne J. H. Buiter, Oriol Ferrer, Riccardo Reitano, Michael Rudolf, and Ernst Willingshofer
Solid Earth, 13, 1859–1905, https://doi.org/10.5194/se-13-1859-2022, https://doi.org/10.5194/se-13-1859-2022, 2022
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When a sedimentary basin is subjected to compressional tectonic forces after its formation, it may be inverted. A thorough understanding of such
basin inversionis of great importance for scientific, societal, and economic reasons, and analogue tectonic models form a key part of our efforts to study these processes. We review the advances in the field of basin inversion modelling, showing how the modelling results can be applied, and we identify promising venues for future research.
Eleni Stavropoulou and Lyesse Laloui
Solid Earth, 13, 1823–1841, https://doi.org/10.5194/se-13-1823-2022, https://doi.org/10.5194/se-13-1823-2022, 2022
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Shales are identified as suitable caprock formations for geolocigal CO2 storage thanks to their low permeability. Here, small-sized shale samples are studied under field-representative conditions with X-ray tomography. The geochemical impact of CO2 on calcite-rich zones is for the first time visualised, the role of pre-existing micro-fissures in the CO2 invasion trapping in the matererial is highlighted, and the initiation of micro-cracks when in contact with anhydrous CO2 is demonstrated.
Conor M. O'Sullivan, Conrad J. Childs, Muhammad M. Saqab, John J. Walsh, and Patrick M. Shannon
Solid Earth, 13, 1649–1671, https://doi.org/10.5194/se-13-1649-2022, https://doi.org/10.5194/se-13-1649-2022, 2022
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The Slyne Basin is a sedimentary basin located offshore north-western Ireland. It formed through a long and complex evolution involving distinct periods of extension. The basin is subdivided into smaller basins, separated by deep structures related to the ancient Caledonian mountain-building event. These deep structures influence the shape of the basin as it evolves in a relatively unique way, where early faults follow these deep structures, but later faults do not.
Mousumi Roy
Solid Earth, 13, 1415–1430, https://doi.org/10.5194/se-13-1415-2022, https://doi.org/10.5194/se-13-1415-2022, 2022
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This study investigates one of the key processes that may lead to the destruction and destabilization of continental tectonic plates: the infiltration of buoyant, hot, molten rock (magma) into the base of the plate. Using simple calculations, I suggest that heating during melt–rock interaction may thermally perturb the tectonic plate, weakening it and potentially allowing it to be reshaped from beneath. Geochemical, petrologic, and geologic observations are used to guide model parameters.
Benjamin Guillaume, Guido M. Gianni, Jean-Jacques Kermarrec, and Khaled Bock
Solid Earth, 13, 1393–1414, https://doi.org/10.5194/se-13-1393-2022, https://doi.org/10.5194/se-13-1393-2022, 2022
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Under tectonic forces, the upper part of the crust can break along different types of faults, depending on the orientation of the applied stresses. Using scaled analogue models, we show that the relative magnitude of compressional and extensional forces as well as the presence of inherited structures resulting from previous stages of deformation control the location and type of faults. Our results gives insights into the tectonic evolution of areas showing complex patterns of deformation.
Liming Li, Xianrui Li, Fanyan Yang, Lili Pan, and Jingxiong Tian
Solid Earth, 13, 1371–1391, https://doi.org/10.5194/se-13-1371-2022, https://doi.org/10.5194/se-13-1371-2022, 2022
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We constructed a three-dimensional numerical geomechanics model to obtain the continuous slip rates of active faults and crustal velocities in the northeastern Tibetan Plateau. Based on the analysis of the fault kinematics in the study area, we evaluated the possibility of earthquakes occurring in the main faults in the area, and analyzed the crustal deformation mechanism of the northeastern Tibetan Plateau.
Andrzej Głuszyński and Paweł Aleksandrowski
Solid Earth, 13, 1219–1242, https://doi.org/10.5194/se-13-1219-2022, https://doi.org/10.5194/se-13-1219-2022, 2022
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Old seismic data recently reprocessed with modern software allowed us to study at depth the Late Cretaceous tectonic structures in the Permo-Mesozoic rock sequences in the Sudetes. The structures formed in response to Iberia collision with continental Europe. The NE–SW compression undulated the crystalline basement top and produced folds, faults and joints in the sedimentary cover. Our results are of importance for regional geology and in prospecting for deep thermal waters.
R. Dietmar Müller, Nicolas Flament, John Cannon, Michael G. Tetley, Simon E. Williams, Xianzhi Cao, Ömer F. Bodur, Sabin Zahirovic, and Andrew Merdith
Solid Earth, 13, 1127–1159, https://doi.org/10.5194/se-13-1127-2022, https://doi.org/10.5194/se-13-1127-2022, 2022
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We have built a community model for the evolution of the Earth's plate–mantle system. Created with open-source software and an open-access plate model, it covers the last billion years, including the formation, breakup, and dispersal of two supercontinents, as well as the creation and destruction of numerous ocean basins. The model allows us to
seeinto the Earth in 4D and helps us unravel the connections between surface tectonics and the
beating heartof the Earth, its convecting mantle.
Anthony Jourdon and Dave A. May
Solid Earth, 13, 1107–1125, https://doi.org/10.5194/se-13-1107-2022, https://doi.org/10.5194/se-13-1107-2022, 2022
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In this study we present a method to compute a reference pressure based on density structure in which we cast the problem in terms of a partial differential equation (PDE). We show in the context of 3D models of continental rifting that using the pressure as a boundary condition within the flow problem results in non-cylindrical velocity fields, producing strain localization in the lithosphere along large-scale strike-slip shear zones and allowing the formation and evolution of triple junctions.
Luisa Röckel, Steffen Ahlers, Birgit Müller, Karsten Reiter, Oliver Heidbach, Andreas Henk, Tobias Hergert, and Frank Schilling
Solid Earth, 13, 1087–1105, https://doi.org/10.5194/se-13-1087-2022, https://doi.org/10.5194/se-13-1087-2022, 2022
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Reactivation of tectonic faults can lead to earthquakes and jeopardize underground operations. The reactivation potential is linked to fault properties and the tectonic stress field. We create 3D geometries for major faults in Germany and use stress data from a 3D geomechanical–numerical model to calculate their reactivation potential and compare it to seismic events. The reactivation potential in general is highest for NNE–SSW- and NW–SE-striking faults and strongly depends on the fault dip.
Nadaya Cubas, Philippe Agard, and Roxane Tissandier
Solid Earth, 13, 779–792, https://doi.org/10.5194/se-13-779-2022, https://doi.org/10.5194/se-13-779-2022, 2022
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Earthquake extent prediction is limited by our poor understanding of slip deficit patterns. From a mechanical analysis applied along the Chilean margin, we show that earthquakes are bounded by extensive plate interface deformation. This deformation promotes stress build-up, leading to earthquake nucleation; earthquakes then propagate along smoothed fault planes and are stopped by heterogeneously distributed deformation. Slip deficit patterns reflect the spatial distribution of this deformation.
Piotr Krzywiec, Mateusz Kufrasa, Paweł Poprawa, Stanisław Mazur, Małgorzata Koperska, and Piotr Ślemp
Solid Earth, 13, 639–658, https://doi.org/10.5194/se-13-639-2022, https://doi.org/10.5194/se-13-639-2022, 2022
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Legacy 2-D seismic data with newly acquired 3-D seismic data were used to construct a new model of geological evolution of NW Poland over last 400 Myr. It illustrates how the destruction of the Caledonian orogen in the Late Devonian–early Carboniferous led to half-graben formation, how they were inverted in the late Carboniferous, how the study area evolved during the formation of the Permo-Mesozoic Polish Basin and how supra-evaporitic structures were inverted in the Late Cretaceous–Paleogene.
Paolo Boncio, Eugenio Auciello, Vincenzo Amato, Pietro Aucelli, Paola Petrosino, Anna C. Tangari, and Brian R. Jicha
Solid Earth, 13, 553–582, https://doi.org/10.5194/se-13-553-2022, https://doi.org/10.5194/se-13-553-2022, 2022
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We studied the Gioia Sannitica normal fault (GF) within the southern Matese fault system (SMF) in southern Apennines (Italy). It is a fault with a long slip history that has experienced recent reactivation or acceleration. Present activity has resulted in late Quaternary fault scarps and Holocene surface faulting. The maximum slip rate is ~ 0.5 mm/yr. Activation of the 11.5 km GF or the entire 30 km SMF can produce up to M 6.2 or M 6.8 earthquakes, respectively.
Sepideh Pajang, Laetitia Le Pourhiet, and Nadaya Cubas
Solid Earth, 13, 535–551, https://doi.org/10.5194/se-13-535-2022, https://doi.org/10.5194/se-13-535-2022, 2022
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The local topographic slope of an accretionary prism is often used to determine the effective friction on subduction megathrust. We investigate how the brittle–ductile and the smectite–illite transitions affect the topographic slope of an accretionary prism and its internal deformation to provide clues to determine the origin of observed low topographic slopes in subduction zones. We finally discuss their implications in terms of the forearc basin and forearc high genesis and nature.
Malcolm Aranha, Alok Porwal, Manikandan Sundaralingam, Ignacio González-Álvarez, Amber Markan, and Karunakar Rao
Solid Earth, 13, 497–518, https://doi.org/10.5194/se-13-497-2022, https://doi.org/10.5194/se-13-497-2022, 2022
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Rare earth elements (REEs) are considered critical mineral resources for future industrial growth due to their short supply and rising demand. This study applied an artificial-intelligence-based technique to target potential REE-deposit hosting areas in western Rajasthan, India. Uncertainties associated with the prospective targets were also estimated to aid decision-making. The presented workflow can be applied to similar regions elsewhere to locate potential zones of REE mineralisation.
Erica D. Erlanger, Maria Giuditta Fellin, and Sean D. Willett
Solid Earth, 13, 347–365, https://doi.org/10.5194/se-13-347-2022, https://doi.org/10.5194/se-13-347-2022, 2022
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We present an erosion rate analysis on dated rock and sediment from the Northern Apennine Mountains, Italy, which provides new insights on the pattern of erosion rates through space and time. This analysis shows decreasing erosion through time on the Ligurian side but increasing erosion through time on the Adriatic side. We suggest that the pattern of erosion rates is consistent with the present asymmetric topography in the Northern Apennines, which has likely existed for several million years.
Daniele Cirillo, Cristina Totaro, Giusy Lavecchia, Barbara Orecchio, Rita de Nardis, Debora Presti, Federica Ferrarini, Simone Bello, and Francesco Brozzetti
Solid Earth, 13, 205–228, https://doi.org/10.5194/se-13-205-2022, https://doi.org/10.5194/se-13-205-2022, 2022
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The Pollino region is a highly seismic area of Italy. Increasing the geological knowledge on areas like this contributes to reducing risk and saving lives. We reconstruct the 3D model of the faults which generated the 2010–2014 seismicity integrating geological and seismological data. Appropriate relationships based on the dimensions of the activated faults suggest that they did not fully discharge their seismic potential and could release further significant earthquakes in the near future.
Steven Whitmeyer, Lynn Fichter, Anita Marshall, and Hannah Liddle
Solid Earth, 12, 2803–2820, https://doi.org/10.5194/se-12-2803-2021, https://doi.org/10.5194/se-12-2803-2021, 2021
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Field trips in the Stratigraphy, Structure, Tectonics (SST) course transitioned to a virtual format in Fall 2020, due to the COVID pandemic. Virtual field experiences (VFEs) were developed in web Google Earth and were evaluated in comparison with on-location field trips via an online survey. Students recognized the value of VFEs for revisiting outcrops and noted improved accessibility for students with disabilities. Potential benefits of hybrid field experiences were also indicated.
Amir Kalifi, Philippe Hervé Leloup, Philippe Sorrel, Albert Galy, François Demory, Vincenzo Spina, Bastien Huet, Frédéric Quillévéré, Frédéric Ricciardi, Daniel Michoux, Kilian Lecacheur, Romain Grime, Bernard Pittet, and Jean-Loup Rubino
Solid Earth, 12, 2735–2771, https://doi.org/10.5194/se-12-2735-2021, https://doi.org/10.5194/se-12-2735-2021, 2021
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Molasse deposits, deposited and deformed at the western Alpine front during the Miocene (23 to 5.6 Ma), record the chronology of that deformation. We combine the first precise chronostratigraphy (precision of ∼0.5 Ma) of the Miocene molasse, the reappraisal of the regional structure, and the analysis of growth deformation structures in order to document three tectonic phases and the precise chronology of thrust westward propagation during the second one involving the Belledonne basal thrust.
Mark R. Handy, Stefan M. Schmid, Marcel Paffrath, Wolfgang Friederich, and the AlpArray Working Group
Solid Earth, 12, 2633–2669, https://doi.org/10.5194/se-12-2633-2021, https://doi.org/10.5194/se-12-2633-2021, 2021
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New images from the multi-national AlpArray experiment illuminate the Alps from below. They indicate thick European mantle descending beneath the Alps and forming blobs that are mostly detached from the Alps above. In contrast, the Adriatic mantle in the Alps is much thinner. This difference helps explain the rugged mountains and the abundance of subducted and exhumed units at the core of the Alps. The blobs are stretched remnants of old ocean and its margins that reach down to at least 410 km.
Maurizio Ercoli, Daniele Cirillo, Cristina Pauselli, Harry M. Jol, and Francesco Brozzetti
Solid Earth, 12, 2573–2596, https://doi.org/10.5194/se-12-2573-2021, https://doi.org/10.5194/se-12-2573-2021, 2021
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Past strong earthquakes can produce topographic deformations, often
memorizedin Quaternary sediments, which are typically studied by paleoseismologists through trenching. Using a ground-penetrating radar (GPR), we unveiled possible buried Quaternary faulting in the Mt. Pollino seismic gap region (southern Italy). We aim to contribute to seismic hazard assessment of an area potentially prone to destructive events as well as promote our workflow in similar contexts around the world.
Luca Smeraglia, Nathan Looser, Olivier Fabbri, Flavien Choulet, Marcel Guillong, and Stefano M. Bernasconi
Solid Earth, 12, 2539–2551, https://doi.org/10.5194/se-12-2539-2021, https://doi.org/10.5194/se-12-2539-2021, 2021
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In this paper, we dated fault movements at geological timescales which uplifted the sedimentary successions of the Jura Mountains from below the sea level up to Earth's surface. To do so, we applied the novel technique of U–Pb geochronology on calcite mineralizations that precipitated on fault surfaces during times of tectonic activity. Our results document a time frame of the tectonic evolution of the Jura Mountains and provide new insight into the broad geological history of the Western Alps.
Renas I. Koshnaw, Fritz Schlunegger, and Daniel F. Stockli
Solid Earth, 12, 2479–2501, https://doi.org/10.5194/se-12-2479-2021, https://doi.org/10.5194/se-12-2479-2021, 2021
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As continental plates collide, mountain belts grow. This study investigated the provenance of rocks from the northwestern segment of the Zagros mountain belt to unravel the convergence history of the Arabian and Eurasian plates. Provenance data synthesis and field relationships suggest that the Zagros Mountains developed as a result of the oceanic crust emplacement on the Arabian continental plate, followed by the Arabia–Eurasia collision and later uplift of the broader region.
David Hindle and Jonas Kley
Solid Earth, 12, 2425–2438, https://doi.org/10.5194/se-12-2425-2021, https://doi.org/10.5194/se-12-2425-2021, 2021
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Central western Europe underwent a strange episode of lithospheric deformation, resulting in a chain of small mountains that run almost west–east across the continent and that formed in the middle of a tectonic plate, not at its edges as is usually expected. Associated with these mountains, in particular the Harz in central Germany, are marine basins contemporaneous with the mountain growth. We explain how those basins came to be as a result of the mountains bending the adjacent plate.
Andreas Eberts, Hamed Fazlikhani, Wolfgang Bauer, Harald Stollhofen, Helga de Wall, and Gerald Gabriel
Solid Earth, 12, 2277–2301, https://doi.org/10.5194/se-12-2277-2021, https://doi.org/10.5194/se-12-2277-2021, 2021
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We combine gravity anomaly and topographic data with observations from thermochronology, metamorphic grades, and the granite inventory to detect patterns of basement block segmentation and differential exhumation along the southwestern Bohemian Massif. Based on our analyses, we introduce a previously unknown tectonic structure termed Cham Fault, which, together with the Pfahl and Danube shear zones, is responsible for the exposure of different crustal levels during late to post-Variscan times.
Cited articles
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Beyssac, O., Rouzaud, J. N., Goffé, B., Brunet, F., and Chopin, C.: Graphitization in a high-pressure, low-temperature metamorphic gradient: a Raman microspectroscopy and HRTEM study, Contrib. Mineral. Petr., 143, 19–31, 2002b.
Beyssac, O., Brunet, F., Petitet, J. P., Goffé, B., and Rouzand, J. N.: Experimental study of the microtextural and structural transformations of carbonaceous materials under pressure and temperature, Eur. J. Mineral., 15, 937–951, 2003.
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Crespo, E., Luque, F. J., Barrenechea, J. F., and Rodas, M.: Influence of grinding on graphite crystallinity from experimental and natural data: implications for graphite thermometry and sample preparation, Mineral. Mag., 70, 697–707, 2006.
Kirilova, M., Toy, V., Timms, N., Halfpenny, A., Menzies, C., Craw, D., Beyssac, O., Sutherland, R., Townend, J., Boulton, C., Carpenter, B., Cooper, A., Grieve, J., Little, T., Morales, L., Morgan, C., Mori, H., Sauer, K., Schleicher, A., Williams, J., and Craw, L.: Textural changes of graphitic carbon by tectonic and hydrothermal processes in an active plate boundary fault zone, Alpine Fault, New Zealand, in: Geological Society, London, Special Publication “Advances in the Characterization of Ore-Forming Systems from Geological, Geochemical and Geophysical data”, edited by: Gessner, K., Blenkinsop, T. G., and Sorjonen-Ward, P., 453 SP453-13, 2017.
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Morrow, C. A., Moore, D. E., and Lockner, D. A.: The effect of mineral bond strength and adsorbed water on fault gouge frictional strength, Geophys. Res. Lett., 27, 815–818, 2000.
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Short summary
Graphite crystallinity “irreversibly” increases with temperature and it has been calibrated as a thermometer recording peak temperatures experienced by a rock. To examine the possibility of mechanical modifications of graphite structure and the impacts on graphite thermometry we performed deformation experiments. Raman spectroscopy demonstrates a reduction in crystallinity due to mechanical reworking in the brittle field. This finding clearly compromises the validity of the graphite thermometry.
Graphite crystallinity “irreversibly” increases with temperature and it has been calibrated...
