Articles | Volume 9, issue 2
https://doi.org/10.5194/se-9-385-2018
© 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-9-385-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Method article
| 
06 Apr 2018
Method article |
| 06 Apr 2018
Monte Carlo simulation for uncertainty estimation on structural data in implicit 3-D geological modeling, a guide for disturbance distribution selection and parameterization
Evren Pakyuz-Charrier
CORRESPONDING AUTHOR
Centre for Exploration Targeting, The University of Western Australia,
35 Stirling Hwy, Crawley WA 6009, Australia
Mark Lindsay
Centre for Exploration Targeting, The University of Western Australia,
35 Stirling Hwy, Crawley WA 6009, Australia
Vitaliy Ogarko
The International Centre for Radio Astronomy Research, The University
of Western Australia, 35 Stirling Hwy, Crawley WA 6009, Australia
Jeremie Giraud
Centre for Exploration Targeting, The University of Western Australia,
35 Stirling Hwy, Crawley WA 6009, Australia
Mark Jessell
Centre for Exploration Targeting, The University of Western Australia,
35 Stirling Hwy, Crawley WA 6009, Australia
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Solid Earth, 10, 1663–1684, https://doi.org/10.5194/se-10-1663-2019, https://doi.org/10.5194/se-10-1663-2019, 2019
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Xiaojun Feng, Enyuan Wang, Jérôme Ganne, Roland Martin, and Mark W. Jessell
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Elizabeth Parker Wilson, Pablo Granado, Pablo Santolaria, Oriol Ferrer, and Josep Anton Muñoz
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Adam J. Cawood, Hannah Watkins, Clare E. Bond, Marian J. Warren, and Mark A. Cooper
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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.
Johanna Heeb, David Healy, Nicholas E. Timms, and Enrique Gomez-Rivas
EGUsphere, https://doi.org/10.5194/egusphere-2023-161, https://doi.org/10.5194/egusphere-2023-161, 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 Giennenas, Dimitrios Sokoutis, Ernst Willingshofer, Muhammad Hassaan, and Jan Inge Faleide
EGUsphere, https://doi.org/10.5194/egusphere-2023-10, https://doi.org/10.5194/egusphere-2023-10, 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 evolution history was probably influenced by plate tectonic reorganizations. From scaled experiments, we deducted several types of structures (faults, folds and sedimentary basins) that helps us to improve the understanding of the history of the opening of the North Atlantic.
Tania Habel, Martine Simoes, Robin Lacassin, Daniel Carrizo, and German Aguilar
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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.
Sonia Yeung, Marnie Forster, Emmanuel Skourtsos, and Gordon Lister
Solid Earth, 12, 2255–2275, https://doi.org/10.5194/se-12-2255-2021, https://doi.org/10.5194/se-12-2255-2021, 2021
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We do not know when the ancient Tethys Ocean lithosphere began to founder, but one clue can be found in subduction accreted tectonic slices, including Gondwanan basement terranes on the island of Ios, Cyclades, Greece. We propose a 250–300 km southwards jump of the subduction megathrust with a period of flat-slab subduction followed by slab break-off. The initiation and its subsequent rollback of a new subduction zone would explain the onset of Oligo–Miocene extension and accompanying magmatism.
Rahul Prabhakaran, Giovanni Bertotti, Janos Urai, and David Smeulders
Solid Earth, 12, 2159–2209, https://doi.org/10.5194/se-12-2159-2021, https://doi.org/10.5194/se-12-2159-2021, 2021
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Rock fractures are organized as networks with spatially varying arrangements. Due to networks' influence on bulk rock behaviour, it is important to quantify network spatial variation. We utilize an approach where fracture networks are treated as spatial graphs. By combining graph similarity measures with clustering techniques, spatial clusters within large-scale fracture networks are identified and organized hierarchically. The method is validated on a dataset with nearly 300 000 fractures.
Olivier Lacombe, Nicolas E. Beaudoin, Guilhem Hoareau, Aurélie Labeur, Christophe Pecheyran, and Jean-Paul Callot
Solid Earth, 12, 2145–2157, https://doi.org/10.5194/se-12-2145-2021, https://doi.org/10.5194/se-12-2145-2021, 2021
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This paper aims to illustrate how the timing and duration of contractional deformation associated with folding in orogenic forelands can be constrained by the dating of brittle mesostructures observed in folded strata. The study combines new and already published absolute ages of fractures to provide, for the first time, an educated discussion about the factors controlling the duration of the sequence of deformation encompassing layer-parallel shortening, fold growth, and late fold tightening.
Vincent Famin, Hugues Raimbourg, Muriel Andreani, and Anne-Marie Boullier
Solid Earth, 12, 2067–2085, https://doi.org/10.5194/se-12-2067-2021, https://doi.org/10.5194/se-12-2067-2021, 2021
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Sediments accumulated in accretionary prisms are deformed by the compression imposed by plate subduction. Here we show that deformation of the sediments transforms some minerals in them. We suggest that these mineral transformations are due to the proliferation of microorganisms boosted by deformation. Deformation-enhanced microbial proliferation may change our view of sedimentary and tectonic processes in subduction zones.
Marta Adamuszek, Dan M. Tămaş, Jessica Barabasch, and Janos L. Urai
Solid Earth, 12, 2041–2065, https://doi.org/10.5194/se-12-2041-2021, https://doi.org/10.5194/se-12-2041-2021, 2021
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We analyse folded multilayer sequences in the Ocnele Mari salt mine (Romania) to gain insight into the long-term rheological behaviour of rock salt. Our results indicate the large role of even a small number of impurities in the rock salt for its effective mechanical behaviour. We demonstrate how the development of folds that occur at various scales can be used to constrain the viscosity ratio in the deformed multilayer sequence.
Dario Zampieri, Paola Vannoli, and Pierfrancesco Burrato
Solid Earth, 12, 1967–1986, https://doi.org/10.5194/se-12-1967-2021, https://doi.org/10.5194/se-12-1967-2021, 2021
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The long-lived Schio-Vicenza Fault System is a major shear zone cross-cutting the foreland and the thrust belt of the eastern southern Alps. We review 150 years of scientific works and explain its activity and kinematics, characterized by sinistral and dextral transcurrent motion along its southern and northern sections, respectively, by a geodynamic model that has the Adria indenter as the main actor and coherently reconciles the available geological and geophysical evidence collected so far.
Vincent F. Verwater, Eline Le Breton, Mark R. Handy, Vincenzo Picotti, Azam Jozi Najafabadi, and Christian Haberland
Solid Earth, 12, 1309–1334, https://doi.org/10.5194/se-12-1309-2021, https://doi.org/10.5194/se-12-1309-2021, 2021
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Balancing along geological cross sections reveals that the Giudicarie Belt comprises two kinematic domains. The SW domain accommodated at least ~ 18 km Late Oligocene to Early Miocene shortening. Since the Middle Miocene, the SW domain experienced at least ~ 12–22 km shortening, whereas the NE domain underwent at least ~ 25–35 km. Together, these domains contributed to ~ 40–47 km of sinistral offset of the Periadriatic Fault along the Northern Giudicarie Fault since the Late Oligocene.
Emma A. H. Michie, Mark J. Mulrooney, and Alvar Braathen
Solid Earth, 12, 1259–1286, https://doi.org/10.5194/se-12-1259-2021, https://doi.org/10.5194/se-12-1259-2021, 2021
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Generating an accurate model of the subsurface is crucial when assessing a site for CO2 storage, particularly for a fault-bound storage site that may act as a seal or could reactivate upon CO2 injection. However, we have shown how picking strategy, i.e. line spacing, chosen to create the model significantly influences any subsequent fault analyses but is surprisingly rarely discussed. This analysis has been performed on the Vette Fault bounding the Smeaheia potential CO2 storage site.
David J. Anastasio, Frank J. Pazzaglia, Josep M. Parés, Kenneth P. Kodama, Claudio Berti, James A. Fisher, Alessandro Montanari, and Lorraine K. Carnes
Solid Earth, 12, 1125–1142, https://doi.org/10.5194/se-12-1125-2021, https://doi.org/10.5194/se-12-1125-2021, 2021
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The anisotropy of magnetic susceptibility (AMS) technique provides an effective way to interpret deforming mountain belts. In both the Betics, Spain, and Apennines, Italy, weak but well-organized AMS fabrics were recovered from young unconsolidated and unburied rocks that could not be analyzed with more traditional methods. Collectively, these studies demonstrate the novel ways that AMS can be combined with other data to resolve earthquake hazards in space and time.
Stefano Urbani, Guido Giordano, Federico Lucci, Federico Rossetti, and Gerardo Carrasco-Núñez
Solid Earth, 12, 1111–1124, https://doi.org/10.5194/se-12-1111-2021, https://doi.org/10.5194/se-12-1111-2021, 2021
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Structural studies in active calderas have a key role in the exploration of geothermal systems. We reply in detail to the points raised by the comment of Norini and Groppelli (2020), strengthening the relevance of our structural fieldwork for geothermal exploration and exploitation in active caldera geothermal systems including the Los Humeros caldera.
Jakob Bolz and Jonas Kley
Solid Earth, 12, 1005–1024, https://doi.org/10.5194/se-12-1005-2021, https://doi.org/10.5194/se-12-1005-2021, 2021
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To assess the role smaller graben structures near the southern edge of the Central European Basin System play in the basin’s overall deformational history, we take advantage of a feature found on some of these structures, where slivers from older rock units appear along the graben's main fault, surrounded on both sides by younger strata. The implications for the geometry of the fault provide a substantially improved estimate for the magnitude of normal and thrust motion along the fault system.
Domingo G. A. M. Aerden, Alejandro Ruiz-Fuentes, Mohammad Sayab, and Aidan Forde
Solid Earth, 12, 971–992, https://doi.org/10.5194/se-12-971-2021, https://doi.org/10.5194/se-12-971-2021, 2021
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We studied the geometry of foliations and microfolds preserved within metamorphic garnet crystals using X-ray tomography. The studied rocks are blueschists from Ile de Groix formed during Late Devonian subduction of Gondwana under Armorica. Several sets of differently oriented microfabrics were found recording variations in the direction of subduction. Comparison with similar data for Iberia supports that Iberia rotated only 10–20° during the Cretaceous opening of the North Atlantic.
Alessandro Tibaldi, Noemi Corti, Emanuela De Beni, Fabio Luca Bonali, Susanna Falsaperla, Horst Langer, Marco Neri, Massimo Cantarero, Danilo Reitano, and Luca Fallati
Solid Earth, 12, 801–816, https://doi.org/10.5194/se-12-801-2021, https://doi.org/10.5194/se-12-801-2021, 2021
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The Northeast Rift of Mt Etna is affected by ground deformation linked to gravity sliding of the volcano flank and dike injection. Drone surveys show that the rift is affected by NE-striking extensional fractures and normal faults. Given an age of 1614 CE for the offset lavas, we obtained an extension rate of 1.9 cm yr−1 for the last 406 years. The stress field is characterised by a NW–SE σHmin. Drone surveys allow us to quickly collect data with a resolution of 2–3 cm.
Matteo Demurtas, Steven A.F. Smith, Elena Spagnuolo, and Giulio Di Toro
Solid Earth, 12, 595–612, https://doi.org/10.5194/se-12-595-2021, https://doi.org/10.5194/se-12-595-2021, 2021
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We performed shear experiments on calcite–dolomite gouge mixtures to better understand the behaviour of carbonates during sub-seismic to seismic deformation in the shallow crust. The development of a foliation in the gouge was only restricted to coseismic sliding, whereas fluidisation occurred over a wide range of slip velocities (sub-seismic to coseismic) in the presence of water. These observations will contribute to a better interpretation of the rock record.
James Gilgannon, Marius Waldvogel, Thomas Poulet, Florian Fusseis, Alfons Berger, Auke Barnhoorn, and Marco Herwegh
Solid Earth, 12, 405–420, https://doi.org/10.5194/se-12-405-2021, https://doi.org/10.5194/se-12-405-2021, 2021
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Using experiments that simulate deep tectonic interfaces, known as viscous shear zones, we found that these zones spontaneously develop periodic sheets of small pores. The presence of porous layers in deep rocks undergoing tectonic deformation is significant because it requires a change to the current model of how the Earth deforms. Emergent porous layers in viscous rocks will focus mineralising fluids and could lead to the seismic failure of rocks that are never supposed to have this occur.
Jef Deckers, Bernd Rombaut, Koen Van Noten, and Kris Vanneste
Solid Earth, 12, 345–361, https://doi.org/10.5194/se-12-345-2021, https://doi.org/10.5194/se-12-345-2021, 2021
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This study shows the presence of two structural domains in the western border fault system of the Roer Valley graben. These domains, dominated by NW–SE-striking faults, displayed distinctly different strain distributions during both Late Cretaceous compression and Cenozoic extension. The southern domain is characterized by narrow, localized faulting, while the northern domain is characterized by wide, distributed faulting. The non-colinear WNW–ESE Grote Brogel fault links both domains.
Cited articles
Aldiss, D. T., Black, M. G., Entwisle, D. C., Page, D. P., and Terrington, R. L.: Benefits of a 3-D geological model for major tunnelling works: an example from Farringdon, east-central London, UK, Q. J. Eng. Geol. Hydroge., 45, 405–414, https://doi.org/10.1144/qjegh2011-066, 2012.
Allmendinger, R. W., Siron, C. R., and Scott, C. P.: Structural data collection with mobile devices: Accuracy, redundancy, and best practices, J. Struct. Geol., 102, 98–112, 2017.
Aug, C.: Modelisation geologique 3-D et caracterisation des incertitudes par la methode du champ de potentiel, PhD, Ecole des Mines de Paris, Paris, 220 pp., 2004.
Aug, C., Chilès, J.-P., Courrioux, G., and Lajaunie, C.: 3-D geological modelling and uncertainty: The potential-field method, in: Geostatistics Banff 2004, Springer, 145–154, 2005.
Bagchi, P.: Bayesian analysis of directional data, University of Toronto, Ottawa, Ont: National Library of Canada, 1987.
Bagchi, P. and Guttman, I.: Theoretical considerations of the multivariate von Mises-Fisher distribution, J. Appl. Stat., 15, 149–169, 1988.
Banerjee, A., Dhillon, I. S., Ghosh, J., and Sra, S.: Clustering on the Unit Hypersphere using von Mises-Fisher Distributions, J. Mach. Learn. Res., 6, 1345–1382, 2005.
Bardossy, G. and Fodor, J.: Traditional and NewWays to Handle Uncertainty in Geology, Nat. Ressour. Res., 10, 179–187, 2001.
Beven, K. and Binley, A.: The future of distributed models: model calibration and uncertainty prediction, Hydrol. Process., 6, 279–298, 1992.
Bewoor, A. K. and Kulkarni, V. A.: Metrology and measurement, McGraw-Hill Education, New Delhi, 2009.
Bucher, J. L.: The metrology handbook, edited by: Bucher, J. L., ASQ Quality Press, United States of America, 2012.
Calcagno, P., Chilès, J. P., Courrioux, G., and Guillen, A.: Geological modelling from field data and geological knowledge, Phys. Earth Planet. Int., 171, 147–157, https://doi.org/10.1016/j.pepi.2008.06.013, 2008.
Camacho, R. A., Martin, J. L., McAnally, W., Díaz-Ramirez, J., Rodriguez, H., Sucsy, P., and Zhang, S.: A comparison of Bayesian methods for uncertainty analysis in hydraulic and hydrodynamic modeling, J. Am. Water Ressour. Assoc., 51, 1372–1393, 2015.
Cammack, R.: Developing an engineering geological model in the fractured and brecciated rocks of a copper porphyry deposit, Geol. Soc. Lond. Eng. Geol. Spec. Publ., 27, 93–100, https://doi.org/10.1144/egsp27.8, 2016.
Carmichael, T. and Ailleres, L.: Method and analysis for the upscaling of structural data, J. Struct. Geol., 83, 121–133, 2016.
Cawood, A. J., Bond, C. E., Howell, J. A., Butler, R. W., and Totake, Y.: LiDAR, UAV or compass-clinometer? Accuracy, coverage and the effects on structural models, J. Struct. Geol., 98, 67–82, 2017.
Cayley, R. A., Osborne, C. R., and Vanderberg, A. H. M.: Mansfield 1:50 000 geological map, Geological Survey of Victoria, GeoScience Victoria, Department of Primary Industries, Melbourne, 2006.
Chilès, J. P. and Delfiner, P.: Geostatistics: modeling spatial uncertainty, John Wiley & Sons, New Jersey, 2009.
Chilès, J. P., Aug, C., Guillen, A., and Lees, T.: Modelling the Geometry of Geological Units and its Uncertainty in 3-D From Structural Data: The Potential-Field Method, Orebody Modelling and Strategic Mine Planning, Perth, 22 November 2004, 2004.
Courrioux, G., Allanic, C., Bourgine, B., Guillen, A., Baudin, T., Lacquement, F., Gabalda, S., Cagnard, F., Le Bayon, B., and Besse, J.: Comparisons from multiple realizations of a geological model, Implication for uncertainty factors identification, IAMG 2015: The 17th annual conference of the International Association for Mathematical Geosciences, 2015.
Davis, J. C.: Statistics and Data Analysis in Geology, 3rd Edn., Wiley, New Jersey, 656 pp., 2003.
de la Varga, M. and Wellmann, J. F.: Structural geologic modeling as an inference problem: A Bayesian perspective, Interpretation, 4, SM1–SM16, 2016.
Delgado Marchal, J., Garrido Manrique, J., Lenti, L., López Casado, C., Martino, S., and Sierra, F. J.: Unconventional pseudostatic stability analysis of the Diezma landslide (Granada, Spain) based on a high-resolution engineering-geological model, Eng. Geol., 184, 81–95, https://doi.org/10.1016/j.enggeo.2014.11.002, 2015.
Dominy, S. C. N., Mark, A., and Annels, A. E.: Errors and Uncertainty in Mineral Resource and Ore Reserve Estimation: The Importance of Getting it Right, Explor. Min. Geol., 11, 77–98, 2002.
Dosne, A.-G., Bergstrand, M., and Karlsson, M. O.: A strategy for residual error modeling incorporating scedasticity of variance and distribution shape, J. Pharmacokinet. Phar., 43, 137–151, 2016.
Eiken, O., Haugen, G. U., Schonewille, M., and Duijndam, A.: D. A Proven Method for Acquiring Highly Repeatable Towed Streamer Seismic Data, in: Insights and Methods for 4D Reservoir Monitoring and Characterization, Society of Exploration Geophysicists and European Association of Geoscientists and Engineers, 209–216, 2005.
Ennis-King, J. and Paterson, L.: Engineering Aspects of Geological Sequestration of Carbon Dioxide, Asia Pacific Oil and Gas Conference and Exhibition Melbourne, Australia, 8 October 2002, 2002.
Eubank, R. and Thomas, W.: Detecting heteroscedasticity in nonparametric regression, J. Roy. Stat. Soc. B, 55, 145–155, 1993.
Fisher, N. I., Lewis, T., and Embleton, B. J.: Statistical analysis of spherical data, Cambridge university press, Cambridge, 1987.
FitzGerald, D., Chilès, J. P., and Guillen, A.: Delineate Three-Dimensional Iron Ore Geology and Resource Models Using the Potential Field Method, Iron Ore Conference, Perth, 27 July 2009, 2009.
Freni, G. and Mannina, G.: Bayesian approach for uncertainty quantification in water quality modelling: The influence of prior distribution, J. Hydrol., 392, 31–39, 2010.
Gelman, A., Carlin, J. B., Stern, H. S., and Rubin, D. B.: Bayesian data analysis, Chapman & Hall/CRC Boca Raton, FL, USA, 2014.
Gnedenko, B. and Kolmogorov, A.: Limit distributions for sums of independent, Am. J. Math., 105, 28–35, 1954.
Guillen, A., Calcagno, P., Courrioux, G., Joly, A., and Ledru, P.: Geological modelling from field data and geological knowledge, Phys. Earth Planet. Int., 171, 158–169, https://doi.org/10.1016/j.pepi.2008.06.014, 2008.
Haydon, S. J., Skladzien, P. B., and Cayley, R. A.: Parts of Mansfield Alexandra and Euroa 1:100 000 maps: Geological interpretation of geophysical features map, Geological Survey of Victoria, Geoscience Victoria, Deparment of Primary Industries, Melbourne, 2006.
Hornik, K. and Grün, B.: On conjugate families and Jeffreys priors for von Mises–Fisher distributions, J. Stat. Plan. Infer., 143, 992–999, 2013.
Intrepid Geophysics: “GeoModeller API” Intrepid Geophysics|Home of GeoModeller, Intrepid, Jetstream and Sea-g|Gravity, Magnetics, Radiometrics, FTG, available at: www.intrepid-geophysics.com/ig/index.php?page=geomodeller-api, last access: 19 February 2018.
Isaaks, E. H. and Srivastava, R. M.: Applied Geostatistics, Oxford University Press, Inc., New York, 561 pp., 1989.
Jairo, N.: Estimation and propagation of parameter uncertainty in lumped hydrological models: A case study of HSPF model applied to luxapallila creek watershed in southeast USA, J. Hydrogeol. Hydrol. Eng., https://doi.org/10.4172/2325-9647.1000105, 2013.
Jennings, D., Cormack, S., Coutts, A. J., Boyd, L., and Aughey, R. J.: The validity and reliability of GPS units for measuring distance in team sport specific running patterns, Int. J. Sport. Physiol., 5, 328–341, 2010.
Jessell, M.: Noddy: an interactive map creation package, Unpublished MSc Thesis, University of London, 1981.
Jessell, M., Aillères, L., and de Kemp, E. A.: Towards an integrated inversion of geoscientific data: What price of geology?, Tectonophys, 490, 294–306, https://doi.org/10.1016/j.tecto.2010.05.020, 2010.
Jessell, M., Aillères, L., de Kemp, E. A., Lindsay, M. D., Wellmann, J. F., Hillier, M., Laurent, G., Carmichael, T., and Martin, R.: Next Generation Three-Dimensional Geologic Modeling and Inversion, in: Society of Economic Geologists Special Publication 18, Society of Economic Geologists, 12, 2014a.
Kamm, J., Lundin, I. A., Bastani, M., Sadeghi, M., and Pedersen, L. B.: Joint inversion of gravity, magnetic, and petrophysical data – A case study from a gabbro intrusion in Boden, Sweden, Geophysics, 80, B131–B152, 2015.
Kent, J. T. and Hamelryck, T.: Using the Fisher-Bingham distribution in stochastic models for protein structure, Quantitative Biology, Shape Analysis, and Wavelets, 24, 57–60, 2005.
Kolmogorov, A. N.: Foundations of the Theory of Probability, Chelsea Publishing Company, 1950.
Kragh, E. and Christie, P.: Seismic repeatability, normalized rms, and predictability, Lead Edge, 21, 640–647, 2002.
Lajaunie, C.: Comparing Some Approximate Methods for Building Local Confidence Intervals for Predicting Regionalized Variables, Math. Geol., 22, 123–144, https://doi.org/10.1007/BF00890301, 1990.
Lajaunie, C., Courrioux, G., and Manuel, L.: Foliation fields and 3-D cartography in geology: principles of a method based on potential interpolation, Math. Geol., 29, 571–584, 1997.
Lark, R. M., Mathers, S. J., Thorpe, S., Arkley, S. L. B., Morgan, D. J., and Lawrence, D. J. D.: A statistical assessment of the uncertainty in a 3-D geological framework model, P. Geol. Assoc. Can., 124, 946–958, https://doi.org/10.1016/j.pgeola.2013.01.005, 2013.
Lark, R. M., Thorpe, S., Kessler, H., and Mathers, S. J.: Interpretative modelling of a geological cross section from boreholes: sources of uncertainty and their quantification, Solid Earth, 5, 1189–1203, https://doi.org/10.5194/se-5-1189-2014, 2014.
Levenbach, H.: The estimation of heteroscedasticity from a marginal likelihood function, J. Am. Stat. Assoc., 68, 436–439, 1973.
Lindsay, M. D., Aillères, L., Jessell, M., de Kemp, E. A., and Betts, P. G.: Locating and quantifying geological uncertainty in three-dimensional models: Analysis of the Gippsland Basin, southeastern Australia, Tectonophys, 546–547, 10–27, https://doi.org/10.1016/j.tecto.2012.04.007, 2012.
Lindsay, M. D., Perrouty, S., Jessell, M., and Aillères, L.: Making the link between geological and geophysical uncertainty: geodiversity in the Ashanti Greenstone Belt, Geophys. J. Int., 195, 903–922, https://doi.org/10.1093/gji/ggt311, 2013.
Lisle, R. J. and Leyshon, P. R.: Stereographic projection techniques for geologists and civil engineers, Cambridge University Press, Cambridge, 2004.
Mardia, K. V. and El-Atoum, S.: Bayesian inference for the von Mises-Fisher distribution, Biom, 63, 203–206, 1976.
Matheron, G.: La Theorie des Variables Regionalisees et ses Applications, Les Cahiers du Centre de Morphologie Mathematique de Fontainebleau, ENSMP, Paris, 220 pp., 1970.
Maxelon, M. and Mancktelow, N. S.: Three-dimensional geometry and tectonostratigraphy of the Pennine zone, Central Alps, Switzerland and Northern Italy, Earth-Sci. Rev., 71, 171–227, 2005.
Middlemiss, R., Samarelli, A., Paul, D., Hough, J., Rowan, S., and Hammond, G.: Measurement of the Earth tides with a MEMS gravimeter, Nature, 531, 614–617, 2016.
Moeck, I. S.: Catalog of geothermal play types based on geologic controls, Renew. Sust. Energ. Rev., 37, 867–882, https://doi.org/10.1016/j.rser.2014.05.032, 2014.
Moffat, R. J.: Contributions to the theory of single-sample uncertainty analysis, ASME Trans. J. Fluids Eng., 104, 250–258, 1982.
Moffat, R. J.: Describing the uncertainties in experimental results, Exp. Therm. Fluid Sci., 1, 3–17, 1988.
Morita, S., Thall, P. F., and Müller, P.: Evaluating the impact of prior assumptions in Bayesian biostatistics, Stat. Biosci., 2, 1–17, 2010.
Myer, D., Constable, S., and Key, K.: Broad-band waveforms and robust processing for marine CSEM surveys, Geophys. J. Int., 184, 689–698, 2011.
Nearing, G. S., Tian, Y., Gupta, H. V., Clark, M. P., Harrison, K. W., and Weijs, S. V.: A philosophical basis for hydrological uncertainty, Hydrol. Sci. J., 61, 1666–1678, https://doi.org/10.1080/02626667.2016.1183009, 2016.
Nelson, R., Lenox, L., and Ward Jr., B.: Oriented core: its use, error, and uncertainty, AAPG Bull., 71, 357–367, 1987.
Nordahl, K. and Ringrose, P. S.: Identifying the representative elementary volume for permeability in heterolithic deposits using numerical rock models, Math. Geosci., 40, 753–771, 2008.
Novakova, L. and Pavlis, T. L.: Assessment of the precision of smart phones and tablets for measurement of planar orientations: A case study, J. Struct. Geol., 97, 93–103, 2017.
Omre, H.: Bayesian kriging – merging observations and qualified guesses in kriging, Math. Geol., 19, 25–39, 1987.
Pakyuz-Charrier, E.: Basic graben GeoModeller model and relevant MCUE outputs, Zenodo, https://doi.org/10.5281/zenodo.854730, 2017.
Pakyuz-Charrier, E. and Intrepid Geophysics: Mansfield (Victoria, Australia) area original GeoModeller model and relevant MCUE outputs, Zenodo, https://doi.org/10.5281/zenodo.848225, 2017.
Patel, J. K. and Read, C. B.: Handbook of the normal distribution, CRC Press, New York, 1996.
Perrone, A., Lapenna, V., and Piscitelli, S.: Electrical resistivity tomography technique for landslide investigation: A review, Earth-Sci. Rev., 135, 65–82, 2014.
Phillips, F. C.: The use of stereographic projection in structural geology, Edward Arnold, London, 1960.
Pilz, J. and Spöck, G.: Why do we need and how should we implement Bayesian kriging methods, Stoch. Env. Res. Risk A., 22, 621–632, 2008.
Prada, S., Cruz, J. V., and Figueira, C.: Using stable isotopes to characterize groundwater recharge sources in the volcanic island of Madeira, Portugal, J. Hydrol., 536, 409–425, https://doi.org/10.1016/j.jhydrol.2016.03.009, 2016.
Quirein, J., Hampson, D., and Schuelke, J.: Use of Multi-Attribute Transforms to Predict Log Properties from Seismic Data, EAGE Conference on Exploring the Synergies between Surface and Borehole Geoscience-Petrophysics meets Geophysics, 2000.
Rawat, G., Arora, B., and Gupta, P.: Electrical resistivity cross-section across the Garhwal Himalaya: Proxy to fluid-seismicity linkage, Tectonophys, 637, 68–79, 2014.
Richardson, L. M.: Index of Airborne Geophysical Surveys, Seventh Edn., Geoscience Australia Record 2003/10., 171, 2003.
Rodrigues, J., Galvão Leite, J., and Milan, L. A.: Theory & Methods: An Empirical Bayes Inference for the von Mises Distribution, Aust. NZ. J. Stat., 42, 433–440, 2000.
Shannon, C. E.: A Mathematical Theory of Communication, Bell Syst. Tech. J., 27, 379–423, 1948.
Sivia, D. S. and Skilling, J.: Data Analysis A Bayesian Tutorial, 2nd Edn., Oxford Science Publications, Oxford University Press, Oxford, 246 pp., 2006.
Sra, S.: A short note on parameter approximation for von Mises-Fisher distributions: and a fast implementation of I s (x), Comput. Stat., 27, 177–190, https://doi.org/10.1007/s00180-011-0232-x, 2011.
Stigsson, M.: Orientation Uncertainty of Structures Measured in Cored Boreholes: Methodology and Case Study of Swedish Crystalline Rock, Rock Mech. Rock Eng., 49, 4273–4284, 2016.
Thiel, S., Heinson, G., Reid, A., and Robertson, K.: Insights into lithospheric architecture, fertilisation and fluid pathways from AusLAMP MT, ASEG Ext Abstr, 2016, 1–6, 2016.
Vos, P. C., Bunnik, F. P. M., Cohen, K. M., and Cremer, H.: A staged geogenetic approach to underwater archaeological prospection in the Port of Rotterdam (Yangtzehaven, Maasvlakte, The Netherlands): A geological and palaeoenvironmental case study for local mapping of Mesolithic lowland landscapes, Quatern. Int., 367, 4–31, https://doi.org/10.1016/j.quaint.2014.11.056, 2015.
Wallace, R. E.: Geometry of shearing stress and relation to faulting, J. Geol., 59, 118–130, 1951.
Wang, H., Wellmann, J. F., Li, Z., Wang, X., and Liang, R. Y.: A Segmentation Approach for Stochastic Geological Modeling Using Hidden Markov Random Fields, Math. Geosci., 49, 145–177, https://doi.org/10.1007/s11004-016-9663-9, 2016.
Wellmann, J. F.: Information Theory for Correlation Analysis and Estimation of Uncertainty Reduction in Maps and Models, Entropy, 15, 1464–1485, https://doi.org/10.3390/e15041464, 2013.
Wellmann, J. F. and Regenauer-Lieb, K.: Uncertainties have a meaning: Information entropy as a quality measure for 3-D geological models, Tectonophys, 526–529, 207–216, https://doi.org/10.1016/j.tecto.2011.05.001, 2012.
Wellmann, J. F., Horowitz, F. G., Schill, E., and Regenauer-Lieb, K.: Towards incorporating uncertainty of structural data in 3-D geological inversion, Tectonophys, 490, 141–151, https://doi.org/10.1016/j.tecto.2010.04.022, 2010.
Wellmann, J. F., Finsterle, S., and Croucher, A.: Integrating structural geological data into the inverse modelling framework of iTOUGH2, Comput. Geosci., 65, 95–109, https://doi.org/10.1016/j.cageo.2013.10.014, 2014a.
Wellmann, J. F., Lindsay, M. D., Poh, J., and Jessell, M. W.: Validating 3-D Structural Models with Geological Knowledge for Improved Uncertainty Evaluations, Energy Proced., 59, 374–381, https://doi.org/10.1016/j.egypro.2014.10.391, 2014b.
Wellmann, J. F., Thiele, S. T., Lindsay, M. D., and Jessell, M. W.: pynoddy 1.0: an experimental platform for automated 3-D kinematic and potential field modelling, Geosci. Model Dev., 9, 1019–1035, https://doi.org/10.5194/gmd-9-1019-2016, 2016.
Wilson, E. B.: First and second laws of error, J. Am. Stat. Assoc., 18, 841–851, 1923.
Wood, A. T.: Simulation of the von Mises Fisher distribution, Commun. Stat. Simulat., 23, 157–164, 1994.
Zheng, H., Xie, J., and Jin, Z.: Heteroscedastic sparse representation based classification for face recognition, Neural Process. Lett., 35, 233–244, 2012.
Short summary
MCUE is a method that produces probabilistic 3-D geological models by sampling from distributions that represent the uncertainty of the initial input dataset. This process generates numerous plausible datasets used to produce a range of statistically plausible 3-D models which are combined into a single probabilistic model. In this paper, improvements to distribution selection and parameterization for input uncertainty are proposed.
MCUE is a method that produces probabilistic 3-D geological models by sampling from...
