Articles | Volume 11, issue 3
https://doi.org/10.5194/se-11-855-2020
© Author(s) 2020. 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-11-855-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 May 2020
Research article |
| 08 May 2020
| 08 May 2020
Azimuth-, angle- and frequency-dependent seismic velocities of cracked rocks due to squirt flow
Yury Alkhimenkov
CORRESPONDING AUTHOR
Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland
Swiss Geocomputing Centre, University of Lausanne, Lausanne, Switzerland
Eva Caspari
Chair of Applied Geophysics, Montanuniversity Leoben, Leoben, Austria
Simon Lissa
Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland
Beatriz Quintal
Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland
Swiss Geocomputing Centre, University of Lausanne, Lausanne, Switzerland
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Emmanuel Wyser, Yury Alkhimenkov, Michel Jaboyedoff, and Yury Y. Podladchikov
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We propose an implementation of the material point method using graphical processing units (GPUs) to solve elastoplastic problems in three-dimensional configurations, such as the granular collapse or the slumping mechanics, i.e., landslide. The computational power of GPUs promotes fast code executions, compared to a traditional implementation using central processing units (CPUs). This allows us to study complex three-dimensional problems tackling high spatial resolution.
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In this work, we present an efficient and fast material point method (MPM) implementation in MATLAB. We first discuss the vectorization strategies to adapt this numerical method to a MATLAB implementation. We report excellent agreement of the solver compared with classical analysis among the MPM community, such as the cantilever beam problem. The solver achieves a performance gain of 28 compared with a classical iterative implementation.
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The accelerated pseudo-transient (APT) method is an efficient way to solve partial differential equations, particularly well-suited for parallel computing. This paper explores the APT method's effectiveness in solving elastic, viscoelastic, and hydromechanical problems, focusing on quasi-static conditions in 1D, 2D, and 3D. The study examines the best numerical settings for fast and accurate solutions. The paper shows how the APT method can handle complex problems in high-resolution models.
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Yury Alkhimenkov and Yury Y. Podladchikov
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Emmanuel Wyser, Yury Alkhimenkov, Michel Jaboyedoff, and Yury Y. Podladchikov
Geosci. Model Dev., 14, 7749–7774, https://doi.org/10.5194/gmd-14-7749-2021, https://doi.org/10.5194/gmd-14-7749-2021, 2021
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Emmanuel Wyser, Yury Alkhimenkov, Michel Jaboyedoff, and Yury Y. Podladchikov
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Evgeniia Martuganova, Manfred Stiller, Ben Norden, Jan Henninges, and Charlotte M. Krawczyk
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We demonstrate the applicability of vertical seismic profiling (VSP) acquired using wireline distributed acoustic sensing (DAS) technology for deep geothermal reservoir imaging and characterization. Borehole DAS data provide critical input for seismic interpretation and help assess small-scale geological structures. This case study can be used as a basis for detailed structural exploration of geothermal reservoirs and provide insightful information for geothermal exploration projects.
Brij Singh, Michał Malinowski, Andrzej Górszczyk, Alireza Malehmir, Stefan Buske, Łukasz Sito, and Paul Marsden
Solid Earth, 13, 1065–1085, https://doi.org/10.5194/se-13-1065-2022, https://doi.org/10.5194/se-13-1065-2022, 2022
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Fast depletion of shallower deposits is pushing the mining industry to look for cutting-edge technologies for deep mineral targeting. We demonstrated a joint workflow including two state-of-the-art technologies: full-waveform inversion and reverse time migration. We produced Earth images with significant details which can help with better estimation of areas with high mineralisation, better mine planning and safety measures.
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Solid Earth, 13, 917–934, https://doi.org/10.5194/se-13-917-2022, https://doi.org/10.5194/se-13-917-2022, 2022
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Methods for mineral exploration play an important role within the EU. Exploration must be environmentally friendly, cost effective, and feasible in populated areas. Seismic methods have the potential to deliver detailed images of mineral deposits but suffer from these demands. We show the results for a sparse 3D seismic dataset acquired in Sweden. The 3D depth image allows us to track the known mineralizations beyond the known extent and gives new insights into the geometry of the deposit.
Robert Jackisch, Björn H. Heincke, Robert Zimmermann, Erik V. Sørensen, Markku Pirttijärvi, Moritz Kirsch, Heikki Salmirinne, Stefanie Lode, Urpo Kuronen, and Richard Gloaguen
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We integrate UAS-based magnetic and multispectral data with legacy exploration data of a Ni–Cu–PGE prospect on Disko Island, West Greenland. The basalt unit has a complex magnetization, and we use a constrained 3D magnetic vector inversion to estimate magnetic properties and spatial dimensions of the target unit. Our 3D modelling reveals a horizontal sheet and a strong remanent magnetization component. We highlight the advantage of UAS use in rugged and remote terrain.
Trond Ryberg, Moritz Kirsch, Christian Haberland, Raimon Tolosana-Delgado, Andrea Viezzoli, and Richard Gloaguen
Solid Earth, 13, 519–533, https://doi.org/10.5194/se-13-519-2022, https://doi.org/10.5194/se-13-519-2022, 2022
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Novel methods for mineral exploration play an important role in future resource exploration. The methods have to be environmentally friendly, socially accepted and cost effective by integrating multidisciplinary methodologies. We investigate the potential of passive, ambient noise tomography combined with 3D airborne electromagnetics for mineral exploration in Geyer, Germany. We show that the combination of the two geophysical data sets has promising potential for future mineral exploration.
Chiara Colombero, Myrto Papadopoulou, Tuomas Kauti, Pietari Skyttä, Emilia Koivisto, Mikko Savolainen, and Laura Valentina Socco
Solid Earth, 13, 417–429, https://doi.org/10.5194/se-13-417-2022, https://doi.org/10.5194/se-13-417-2022, 2022
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Passive-source surface waves may be exploited in mineral exploration for deeper investigations. We propose a semi-automatic workflow for their processing. The geological interpretation of the results obtained at a mineral site (Siilinjärvi phosphorus mine) shows large potentialities and effectiveness of the proposed workflow.
Hossein Hassani, Felix Hloušek, Stefan Buske, and Olaf Wallner
Solid Earth, 12, 2703–2715, https://doi.org/10.5194/se-12-2703-2021, https://doi.org/10.5194/se-12-2703-2021, 2021
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Passive seismic imaging methods use natural earthquakes as seismic sources, while in active seismic imaging methods, artificial sources (e.g. explosives) are used to generate seismic waves. We imaged some structures related to a major fault plane through a passive seismic imaging approach using microearthquakes with magnitudes smaller than 0.9 (Mw). These structures have not been illuminated by a previously conducted 3D active seismic survey due to their large dip angles.
Yinshuai Ding and Alireza Malehmir
Solid Earth, 12, 1707–1718, https://doi.org/10.5194/se-12-1707-2021, https://doi.org/10.5194/se-12-1707-2021, 2021
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In this article, we investigate the potential of reverse time migration (RTM) for deep targeting iron oxide deposits and the possible AVO effect that is potentially seen in the common image gathers from this migration algorithm. The results are promising and help to delineate the deposits and host rock structures using a 2D dataset from the Ludvika mines of central Sweden.
Nikita Afonin, Elena Kozlovskaya, Suvi Heinonen, and Stefan Buske
Solid Earth, 12, 1563–1579, https://doi.org/10.5194/se-12-1563-2021, https://doi.org/10.5194/se-12-1563-2021, 2021
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In our study, we show the results of a passive seismic interferometry application for mapping the uppermost crust in the area of active mineral exploration in northern Finland. The obtained velocity models agree well with geological data and complement the results of reflection seismic data interpretation.
Puy Ayarza, José Ramón Martínez Catalán, Ana Martínez García, Juan Alcalde, Juvenal Andrés, José Fernando Simancas, Immaculada Palomeras, David Martí, Irene DeFelipe, Chris Juhlin, and Ramón Carbonell
Solid Earth, 12, 1515–1547, https://doi.org/10.5194/se-12-1515-2021, https://doi.org/10.5194/se-12-1515-2021, 2021
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Vertical incidence seismic profiling on the Iberian Massif images a mid-crustal-scale discontinuity at the top of the reflective lower crust. This feature shows that upper- and lower-crustal reflections merge into it, suggesting that it has often behaved as a detachment. The orogen-scale extension of this discontinuity, present in Gondwanan and Avalonian affinity terranes into the Iberian Massif, demonstrates its relevance, leading us to interpret it as the Conrad discontinuity.
Peter-Lasse Giertzuch, Joseph Doetsch, Alexis Shakas, Mohammadreza Jalali, Bernard Brixel, and Hansruedi Maurer
Solid Earth, 12, 1497–1513, https://doi.org/10.5194/se-12-1497-2021, https://doi.org/10.5194/se-12-1497-2021, 2021
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Two time-lapse borehole ground penetrating radar (GPR) surveys were conducted during saline tracer experiments in weakly fractured crystalline rock with sub-millimeter fractures apertures, targeting electrical conductivity changes. The combination of time-lapse reflection and transmission GPR surveys from different boreholes allowed monitoring the tracer flow and reconstructing the flow path and its temporal evolution in 3D and provided a realistic visualization of the hydrological processes.
Irene Bianchi, Elmer Ruigrok, Anne Obermann, and Edi Kissling
Solid Earth, 12, 1185–1196, https://doi.org/10.5194/se-12-1185-2021, https://doi.org/10.5194/se-12-1185-2021, 2021
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The European Alps formed during collision between the European and Adriatic plates and are one of the most studied orogens for understanding the dynamics of mountain building. In the Eastern Alps, the contact between the colliding plates is still a matter of debate. We have used the records from distant earthquakes to highlight the geometries of the crust–mantle boundary in the Eastern Alpine area; our results suggest a complex and faulted internal crustal structure beneath the higher crests.
Saeid Cheraghi, Alireza Malehmir, Mostafa Naghizadeh, David Snyder, Lucie Mathieu, and Pierre Bedeaux
Solid Earth, 12, 1143–1164, https://doi.org/10.5194/se-12-1143-2021, https://doi.org/10.5194/se-12-1143-2021, 2021
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High-resolution seismic profiles in 2D are acquired in the north and south of the Chibougamau area, Quebec, Canada located in the northeast of the Abitibi Greenstone belt. The area mostly includes volcanic rocks, and both profiles cross over several fault zones. The seismic method is acquired to image the subsurface down to depth of 12 km. The main aim of this study is to image major fault zones and the geological formations connected to those faults to investigate metal endowment in the area.
Jan Henninges, Evgeniia Martuganova, Manfred Stiller, Ben Norden, and Charlotte M. Krawczyk
Solid Earth, 12, 521–537, https://doi.org/10.5194/se-12-521-2021, https://doi.org/10.5194/se-12-521-2021, 2021
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We performed a seismic survey in two 4.3 km deep geothermal research wells using the novel method of distributed acoustic sensing and wireline cables. The characteristics of the acquired data, methods for data processing and quality improvement, and interpretations on the geometry and structure of the sedimentary and volcanic reservoir rocks are presented. The method enables measurements at high temperatures and reduced cost compared to conventional sensors.
Alireza Malehmir, Magdalena Markovic, Paul Marsden, Alba Gil, Stefan Buske, Lukasz Sito, Emma Bäckström, Martiya Sadeghi, and Stefan Luth
Solid Earth, 12, 483–502, https://doi.org/10.5194/se-12-483-2021, https://doi.org/10.5194/se-12-483-2021, 2021
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A smooth transition toward decarbonization demands access to more minerals of critical importance. Europe has a good geology for many of these mineral deposits, but at a depth requiring sensitive, environmentally friendly, and cost-effective methods for their exploration. In this context, we present a sparse 3D seismic dataset that allowed identification of potential iron oxide resources at depth and helped to characterise key geological structures and a historical tailing in central Sweden.
Alba Zappone, Antonio Pio Rinaldi, Melchior Grab, Quinn C. Wenning, Clément Roques, Claudio Madonna, Anne C. Obermann, Stefano M. Bernasconi, Matthias S. Brennwald, Rolf Kipfer, Florian Soom, Paul Cook, Yves Guglielmi, Christophe Nussbaum, Domenico Giardini, Marco Mazzotti, and Stefan Wiemer
Solid Earth, 12, 319–343, https://doi.org/10.5194/se-12-319-2021, https://doi.org/10.5194/se-12-319-2021, 2021
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The success of the geological storage of carbon dioxide is linked to the availability at depth of a capable reservoir and an impermeable caprock. The sealing capacity of the caprock is a key parameter for long-term CO2 containment. Faults crosscutting the caprock might represent preferential pathways for CO2 to escape. A decameter-scale experiment on injection in a fault, monitored by an integrated network of multiparamerter sensors, sheds light on the mobility of fluids within the fault.
Juvenal Andrés, Puy Ayarza, Martin Schimmel, Imma Palomeras, Mario Ruiz, and Ramon Carbonell
Solid Earth, 11, 2499–2513, https://doi.org/10.5194/se-11-2499-2020, https://doi.org/10.5194/se-11-2499-2020, 2020
Yi Zhang, Xinglin Lei, Tsutomu Hashimoto, and Ziqiu Xue
Solid Earth, 11, 2487–2497, https://doi.org/10.5194/se-11-2487-2020, https://doi.org/10.5194/se-11-2487-2020, 2020
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Spatially continuous strain responses in two monitoring wells induced by a well-drilling process were monitored using high-resolution fiber-optic distributed strain sensing (DSS). The modeling results suggest that the strain polarities and magnitudes along the wellbores may be indicative of the layered-permeability structure or heterogeneous formation damage. The performance and value of DSS as a novel hydrogeophysical tool for in situ subsurface monitoring are emphasized.
Benjamin Schwarz and Charlotte M. Krawczyk
Solid Earth, 11, 1891–1907, https://doi.org/10.5194/se-11-1891-2020, https://doi.org/10.5194/se-11-1891-2020, 2020
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Intricate fault and fracture networks cut through the upper crust, and their detailed delineation and characterization play an important role in the Earth sciences. While conventional geophysical sounding techniques only provide indirect means of detection, we present scale-spanning field data examples, in which coherent diffraction imaging – a framework inspired by optics and visual perception – enables the direct imaging of these crustal features at an unprecedented spatial resolution.
Anke Dannowski, Heidrun Kopp, Ingo Grevemeyer, Dietrich Lange, Martin Thorwart, Jörg Bialas, and Martin Wollatz-Vogt
Solid Earth, 11, 873–887, https://doi.org/10.5194/se-11-873-2020, https://doi.org/10.5194/se-11-873-2020, 2020
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The Ligurian Sea opened ~30–15 Ma during the SE migration of the Calabrian subduction zone. Seismic travel time tomography reveals the absence of oceanic crust, documenting that the extension of continental lithosphere stopped before seafloor spreading initiated. The extension led to extreme crustal thinning and possibly exhumed mantle accompanied by syn-rift sedimentation. Our new interpretation of the crust's nature is important for plate reconstruction modelling related to the Alpine orogen.
Eva Caspari, Andrew Greenwood, Ludovic Baron, Daniel Egli, Enea Toschini, Kaiyan Hu, and Klaus Holliger
Solid Earth, 11, 829–854, https://doi.org/10.5194/se-11-829-2020, https://doi.org/10.5194/se-11-829-2020, 2020
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A shallow borehole was drilled to explore the petrophysical and hydraulic characteristics of a hydrothermally active fault in the crystalline Aar massif of the Alps. A key objective of studying surficial features of this kind is to establish analogies with natural and deep-seated engineered hydrothermal systems. A wide range of geophysical borehole logs was acquired, which revealed a complex fracture network in the damage zone of the fault and a related compartmentalized hydraulic behavior.
Jürg Hunziker, Andrew Greenwood, Shohei Minato, Nicolás Daniel Barbosa, Eva Caspari, and Klaus Holliger
Solid Earth, 11, 657–668, https://doi.org/10.5194/se-11-657-2020, https://doi.org/10.5194/se-11-657-2020, 2020
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The characterization of fractures is crucial for a wide range of pertinent applications, such as geothermal energy production, hydrocarbon exploration, CO2 sequestration, and nuclear waste disposal. We estimate fracture parameters based on waves that travel along boreholes (tube waves) using a stochastic optimization approach.
Felix Kästner, Simona Pierdominici, Judith Elger, Alba Zappone, Jochem Kück, and Christian Berndt
Solid Earth, 11, 607–626, https://doi.org/10.5194/se-11-607-2020, https://doi.org/10.5194/se-11-607-2020, 2020
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Knowledge about physical properties at depth is crucial to image and understand structures linked with orogenic processes. We examined seismic velocities from core and downhole data from the COSC-1 borehole, Sweden, and calibrated our results with laboratory measurements on core samples. Despite a strong mismatch between the core and downhole velocities due to microcracks, mafic units are resolved at all scales, while at sample scale, strong seismic anisotropy correlates with the rock foliation.
Ines Dumke and Christian Berndt
Solid Earth, 10, 1989–2000, https://doi.org/10.5194/se-10-1989-2019, https://doi.org/10.5194/se-10-1989-2019, 2019
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Knowing the velocity with which seismic waves travel through the top of the crust is important both for identifying anomalies, e.g. the presence of resources, and for geophysical data evaluation. Traditionally this has been done by using empirical functions. Here, we use machine learning to derive better seismic velocity estimates for the crust below the oceans. In most cases this methods performs better than empirical averages.
Tobias Nickschick, Christina Flechsig, Jan Mrlina, Frank Oppermann, Felix Löbig, and Thomas Günther
Solid Earth, 10, 1951–1969, https://doi.org/10.5194/se-10-1951-2019, https://doi.org/10.5194/se-10-1951-2019, 2019
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An active CO2 degassing site in the western Eger Rift, Czech Republic, was investigated with a 6.5 km long geophysical survey using a specific large-scale geoelectrical setup, supported by shallow geoelectrical surveys and gravity measurements. The experiment reveals unusually low resistivities in the sediments and basement below the degassing area of less than 10 Ω and provides a base for a custom geological model of the area for a future 400 m deep research drilling in this area.
Adrià Meléndez, Clara Estela Jiménez, Valentí Sallarès, and César R. Ranero
Solid Earth, 10, 1857–1876, https://doi.org/10.5194/se-10-1857-2019, https://doi.org/10.5194/se-10-1857-2019, 2019
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A new code for anisotropic travel-time tomography is presented. We describe the equations governing the anisotropic ray propagation algorithm and the modified inversion solver. We study the sensitivity of two medium parameterizations and compare four inversion strategies on a canonical model. This code can provide better understanding of the Earth's subsurface in the rather common geological contexts in which seismic velocity displays a weak dependency on the polar angle of ray propagation.
Clàudia Gras, Daniel Dagnino, Clara Estela Jiménez-Tejero, Adrià Meléndez, Valentí Sallarès, and César R. Ranero
Solid Earth, 10, 1833–1855, https://doi.org/10.5194/se-10-1833-2019, https://doi.org/10.5194/se-10-1833-2019, 2019
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We present a workflow that combines different geophysical techniques, showing that a detailed seismic velocity model can be obtained even for non-optimal data sets, i.e. relatively short-offset, band-limited streamer data recorded in deep water. This fact has an important implication for the Marine seismic community, suggesting that many of the existing data sets should be revisited and analysed with new techniques to enhance our understanding of the subsurface, as in the Alboran Basin case.
Juan Alcalde, Clare E. Bond, Gareth Johnson, Armelle Kloppenburg, Oriol Ferrer, Rebecca Bell, and Puy Ayarza
Solid Earth, 10, 1651–1662, https://doi.org/10.5194/se-10-1651-2019, https://doi.org/10.5194/se-10-1651-2019, 2019
Nikita Afonin, Elena Kozlovskaya, Jouni Nevalainen, and Janne Narkilahti
Solid Earth, 10, 1621–1634, https://doi.org/10.5194/se-10-1621-2019, https://doi.org/10.5194/se-10-1621-2019, 2019
Carla Patricia Bárbara, Patricia Cabello, Alexandre Bouche, Ingrid Aarnes, Carlos Gordillo, Oriol Ferrer, Maria Roma, and Pau Arbués
Solid Earth, 10, 1597–1619, https://doi.org/10.5194/se-10-1597-2019, https://doi.org/10.5194/se-10-1597-2019, 2019
Timothy R. H. Davies, Maurice J. McSaveney, and Natalya V. Reznichenko
Solid Earth, 10, 1385–1395, https://doi.org/10.5194/se-10-1385-2019, https://doi.org/10.5194/se-10-1385-2019, 2019
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Griffith (1921) assumed that energy used to create new surface area by breaking intact rock immediately becomes surface energy which is not available for further breakage. Our lab data disprove this assumption; we created much more new surface area, 90 % on submicron fragments, than the energy involved should allow. As technology allows ever smaller fragments to be measured, continued use of the Griffith assumption will lead to incorrect energy budgets for earthquakes and rock avalanches.
Ben Mather and Javier Fullea
Solid Earth, 10, 839–850, https://doi.org/10.5194/se-10-839-2019, https://doi.org/10.5194/se-10-839-2019, 2019
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The temperature in the crust can be constrained by the Curie depth, which is often interpreted as the 580 °C isotherm. We cast the estimation of Curie depth, from maps of the magnetic anomaly, within a Bayesian framework to properly quantify its uncertainty across the British Isles. We find that uncertainty increases considerably for deeper Curie depths, which demonstrates that generally this method is only reliable in hotter regions, such as Scotland and Northern Ireland.
Andrzej Górszczyk, Stéphane Operto, Laure Schenini, and Yasuhiro Yamada
Solid Earth, 10, 765–784, https://doi.org/10.5194/se-10-765-2019, https://doi.org/10.5194/se-10-765-2019, 2019
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In order to broaden our knowledge about the deep lithosphere using seismic methods, we develop leading-edge imaging workflows integrating different types of data. Here we exploit the complementary information carried by seismic wavefields, which are fundamentally different in terms of acquisition setting. We cast this information into our processing workflow and build a detailed model of the subduction zone, which is subject to further geological interpretation.
Miłosz Mężyk, Michał Malinowski, and Stanisław Mazur
Solid Earth, 10, 683–696, https://doi.org/10.5194/se-10-683-2019, https://doi.org/10.5194/se-10-683-2019, 2019
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The Precambrian East European Craton is one of the most important building blocks of the European plate. Unlike in Scandinavia, its crystalline crust in Poland is concealed beneath younger sediments. Reprocessing of ca. 950 km regional reflection seismic profiles acquired during shale gas exploration in NE Poland revealed reflectivity patterns interpreted as signs of Svekofennian orogeny, proving a similar mechanism of Paleoproterozoic crustal formation across the Baltic Sea.
Anke Dannowski, Heidrun Kopp, Frauke Klingelhoefer, Dirk Klaeschen, Marc-André Gutscher, Anne Krabbenhoeft, David Dellong, Marzia Rovere, David Graindorge, Cord Papenberg, and Ingo Klaucke
Solid Earth, 10, 447–462, https://doi.org/10.5194/se-10-447-2019, https://doi.org/10.5194/se-10-447-2019, 2019
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The nature of the Ionian Sea crust has been the subject of scientific debate for more than 30 years. Seismic data, recorded on ocean bottom instruments, have been analysed and support the interpretation of the Ionian Abyssal Plain as a remnant of the Tethys oceanic lithosphere with the Malta Escarpment as a transform margin and a Tethys opening in the NNW–SSE direction.
Martin Staněk and Yves Géraud
Solid Earth, 10, 251–274, https://doi.org/10.5194/se-10-251-2019, https://doi.org/10.5194/se-10-251-2019, 2019
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Granite is suitable to host geothermal wells or disposals of hazardous waste and in these cases the rock porosity and permeability are critical. Our detailed porosity and permeability data on variously deformed Lipnice granite yield a span of 5 orders of magnitude in permeability between the least and the most deformed facies. To facilitate the estimation of porosity and permeability in similar settings, we provide optical and chemical data on the characteristic minerals of each facies.
David Marti, Ignacio Marzan, Jana Sachsenhausen, Joaquina Alvarez-Marrón, Mario Ruiz, Montse Torne, Manuela Mendes, and Ramon Carbonell
Solid Earth, 10, 177–192, https://doi.org/10.5194/se-10-177-2019, https://doi.org/10.5194/se-10-177-2019, 2019
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A detailed knowledge of the very shallow subsurface has become of crucial interest for modern society, especially if it hosts critical surface infrastructures such as temporary waste storage sites. The use of indirect methods to characterize the internal structure of the subsurface has been successfully applied, based on the 3-D distribution of seismic velocities and well-log data, which are of great interest for civil engineering companies.
Alessandro Lechmann, David Mair, Akitaka Ariga, Tomoko Ariga, Antonio Ereditato, Ryuichi Nishiyama, Ciro Pistillo, Paola Scampoli, Fritz Schlunegger, and Mykhailo Vladymyrov
Solid Earth, 9, 1517–1533, https://doi.org/10.5194/se-9-1517-2018, https://doi.org/10.5194/se-9-1517-2018, 2018
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Muon tomography is a technology, similar to X-ray tomography, to image the interior of an object, including geologically interesting ones. In this work, we examined the influence of rock composition on the physical measurements, and the possible error that is made by assuming a too-simplistic rock model. We performed numerical simulations for a more realistic rock model and found that beyond 300 m of rock, the composition starts to play a significant role and has to be accounted for.
Alireza Malehmir, Bo Bergman, Benjamin Andersson, Robert Sturk, and Mattis Johansson
Solid Earth, 9, 1469–1485, https://doi.org/10.5194/se-9-1469-2018, https://doi.org/10.5194/se-9-1469-2018, 2018
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Interest and demand for green-type energy usage and storage are growing worldwide. Among several, thermal energy storage that stores energy (excess heat or cold) in fluids is particularly interesting. For an upscaling purpose, three seismic profiles were acquired within the Tornquist suture zone in the southwest of Sweden and historical crustal-scale offshore BABEL lines revisited. A number of dykes have been imaged and implications for the storage and tectonic setting within the zone discussed.
Cited articles
Adelinet, M., Fortin, J., Guéguen, Y., Schubnel, A., and Geoffroy, L.:
Frequency and fluid effects on elastic properties of basalt: Experimental
investigations, Geophys. Res. Lett., 37, L02303, https://doi.org/10.1029/2009GL041660, 2010. a
Almqvist, B. S. and Mainprice, D.: Seismic properties and anisotropy of the
continental crust: predictions based on mineral texture and rock
microstructure, Rev. Geophys., 55, 367–433, 2017. a
Amalokwu, K., Best, A. I., and Chapman, M.: Effects of aligned fractures on the
response of velocity and attenuation ratios to water saturation variation: a
laboratory study using synthetic sandstones, Geophys. Pros., 64,
942–957, 2016. a
Andrä, H., Combaret, N., Dvorkin, J., Glatt, E., Han, J., Kabel, M., Keehm,
Y., Krzikalla, F., Lee, M., Madonna, C., et al.: Digital rock physics
benchmarks – Part I: Imaging and segmentation, Comput. Geosci., 50,
25–32, 2013a. a
Andrä, H., Combaret, N., Dvorkin, J., Glatt, E., Han, J., Kabel, M., Keehm,
Y., Krzikalla, F., Lee, M., Madonna, C., et al.: Digital rock physics
benchmarks – Part II: Computing effective properties, Comput. Geosci., 50, 33–43, 2013b. a
Bakulin, A., Grechka, V., and Tsvankin, I.: Estimation of fracture parameters
from reflection seismic data – Part II: Fractured models with orthorhombic
symmetry, Geophysics, 65, 1803–1817, 2000b. a
Best, A. I., Sothcott, J., and McCann, C.: A laboratory study of seismic
velocity and attenuation anisotropy in near-surface sedimentary rocks,
Geophys. Pros., 55, 609–625, 2007. a
Biot, M. A.: Generalized theory of acoustic propagation in porous dissipative
media, J. Acoust. Soc. Am., 34, 1254–1264,
1962. a
Brajanovski, M., Gurevich, B., and Schoenberg, M.: A model for P-wave
attenuation and dispersion in a porous medium permeated by aligned fractures,
Geophys. J. Int., 163, 372–384, 2005. a
Carcione, J. M., Gurevich, B., Santos, J. E., and Picotti, S.: Angular and
frequency-dependent wave velocity and attenuation in fractured porous media,
Pure Appl. Geophys., 170, 1673–1683, 2013. a
Caspari, E., Novikov, M., Lisitsa, V., Barbosa, N. D., Quintal, B., Rubino,
J. G., and Holliger, K.: Attenuation mechanisms in fractured fluid-saturated
porous rocks: a numerical modelling study, Geophys. Pros., 67,
935–955, 2019. a
Chapman, M.: Frequency-dependent anisotropy due to meso-scale fractures in the
presence of equant porosity, Geophys. Pros., 51, 369–379, 2003. a
Chapman, M., Zatsepin, S. V., and Crampin, S.: Derivation of a microstructural
poroelastic model, Geophys. J. Int., 151, 427–451, 2002. a
Chapman, S., Borgomano, J. V., Yin, H., Fortin, J., and Quintal, B.: Forced
oscillation measurements of seismic wave attenuation and stiffness moduli
dispersion in glycerine-saturated Berea sandstone, Geophys. Pros.,
67, 956–968, 2019. a
Fedorov, F. I.: Theory of elastic waves in crystals, 1968. a
Feng, J., Xiao, B., Zhou, R., Pan, W., and Clarke, D. R.: Anisotropic elastic
and thermal properties of the double perovskite slab–rock salt layer
Ln2SrAl2O7 (Ln=La, Nd, Sm, Eu, Gd or Dy) natural superlattice structure,
Acta Material., 60, 3380–3392, 2012. a
Grab, M., Quintal, B., Caspari, E., Maurer, H., and Greenhalgh, S.: Numerical modeling of fluid effects on seismic properties of fractured magmatic geothermal reservoirs, Solid Earth, 8, 255–279, https://doi.org/10.5194/se-8-255-2017, 2017. a
Guo, J., Rubino, J. G., Glubokovskikh, S., and Gurevich, B.: Dynamic seismic
signatures of saturated porous rocks containing two orthogonal sets of
fractures: theory versus numerical simulations, Geophys. J. Int., 213, 1244–1262, 2018. a
Hunziker, J., Favino, M., Caspari, E., Quintal, B., Rubino, J. G., Krause, R.,
and Holliger, K.: Seismic attenuation and stiffness modulus dispersion in
porous rocks containing stochastic fracture networks, J. Geophys. Res.-Sol. Ea., 123, 125–143, 2018. a
Kachanov, M. and Sevostianov, I.: Micromechanics of materials, with
applications, Vol. 249, Springer, 712 pp. https://doi.org/10.1007/978-3-319-76204-3, 2018. a
Kube, C. M. and De Jong, M.: Elastic constants of polycrystals with generally
anisotropic crystals, J. Appl. Phys., 120, 165105, https://doi.org/10.1063/1.4965867, 2016. a
Landau, L. D. and Lifshitz, E.: Course of theoretical physics, Vol. 6, Fluid
Mechanics, London, 554 pp., https://doi.org/10.1016/C2013-0-03799-1, 1959a. a
Landau, L. D. and Lifshitz, E. M.: Course of Theoretical Physics Vol. 7, Theory
and Elasticity, Pergamon press, 187 pp., 1959b. a
Lissa, S., Barbosa, N. D., Rubino, J. G., and Quintal, B.: Seismic attenuation and dispersion in poroelastic media with fractures of variable aperture distributions, Solid Earth, 10, 1321–1336, https://doi.org/10.5194/se-10-1321-2019, 2019. a
Markov, A., Abaimov, S., Sevostianov, I., Kachanov, M., Kanaun, S., and
Akhatov, I.: The effect of multiple contacts between crack faces on crack
contribution to the effective elastic properties, Int. J. Solids Struct., 163, 75–86, 2019. a
Masson, Y. J. and Pride, S.: On the correlation between material structure and
seismic attenuation anisotropy in porous media, J. Geophys. Res.-Sol. Ea., 119, 2848–2870, 2014. a
Maultzsch, S., Chapman, M., Liu, E., and Li, X. Y.: Modelling
frequency-dependent seismic anisotropy in fluid-saturated rock with aligned
fractures: implication of fracture size estimation from anisotropic
measurements, Geophys. Pros., 51, 381–392, 2003. a
Mavko, G. and Jizba, D.: Estimating grain-scale fluid effects on velocity
dispersion in rocks, Geophysics, 56, 1940–1949, 1991. a
Mavko, G. and Nur, A.: Melt squirt in the asthenosphere, J. Geophys. Res., 80, 1444–1448, 1975. a
Mavko, G., Mukerji, T., and Dvorkin, J.: The rock physics handbook: Tools for
seismic analysis of porous media, Cambridge university press, https://doi.org/10.1017/CBO9780511626753, 511 pp., 2009. a
Mayr, S. I. and Burkhardt, H.: Ultrasonic properties of sedimentary rocks:
effect of pressure, saturation, frequency and microcracks, Geophys. J. Int., 164, 246–258, 2006. a
Mikhaltsevitch, V., Lebedev, M., and Gurevich, B.: A laboratory study of
attenuation and dispersion effects in glycerol-saturated Berea sandstone at
seismic frequencies, in: SEG Technical Program Expanded Abstracts 2015, pp.
3085–3089, Society of Exploration Geophysicists, 2015. a
Nemat-Nasser, S. and Hori, M.: Micromechanics: overall properties of
heterogeneous materials, Vol. 37, Elsevier, 675 pp., 2013. a
Pimienta, L., Fortin, J., and Guéguen, Y.: Experimental study of Young’s
modulus dispersion and attenuation in fully saturated sandstones, Geophysics,
80, 57–72, 2015. a
Pride, S. R., Berryman, J. G., and Harris, J. M.: Seismic attenuation due to
wave-induced flow, J. Geophys. Res.-Sol. Ea, 109, B01201, https://doi.org/10.1029/2003JB002639, 2004. a
Quintal, B., Jänicke, R., Rubino, J. G., Steeb, H., and Holliger, K.:
Sensitivity of S-wave attenuation to the connectivity of fractures in
fluid-saturated rocks, Geophysics, 79, 15–24, 2014. a
Ranganathan, S. I. and Ostoja-Starzewski, M.: Universal elastic anisotropy
index, Phys. Rev. Lett., 101, 055504, https://doi.org/10.1103/PhysRevLett.101.055504, 2008. a, b, c, d
Ravindran, P., Fast, L., Korzhavyi, P. A., Johansson, B., Wills, J., and
Eriksson, O.: Density functional theory for calculation of elastic properties
of orthorhombic crystals: Application to TiSi 2, J. Appl. Phys.,
84, 4891–4904, 1998. a
Rubino, J Germán, J., Guarracino, L., Müller, T. M., and Holliger, K.:
Do seismic waves sense fracture connectivity?, Geophys. Res. Lett.,
40, 692–696, 2013. a
Saxena, N. and Mavko, G.: Estimating elastic moduli of rocks from thin
sections: Digital rock study of 3D properties from 2D images, Comput. Geosci., 88, 9–21, 2016. a
Sayers, C. and Kachanov, M.: Microcrack-induced elastic wave anisotropy of
brittle rocks, J. Geophys. Res.-Sol. Ea., 100, 4149–4156,
1995. a
Sayers, C. M.: Stress-dependent elastic anisotropy of sandstones, Geophys. Pros., 50, 85–95, 2002. a
Schenk, O. and Gärtner, K.: Solving unsymmetric sparse systems of linear
equations with PARDISO, Future Gener. Comp. Sy., 20, 475–487,
2004. a
Schoenberg, M. and Sayers, C. M.: Seismic anisotropy of fractured rock,
Geophysics, 60, 204–211, 1995. a
Subramaniyan, S., Quintal, B., Madonna, C., and Saenger, E. H.:
Laboratory-based seismic attenuation in Fontainebleau sandstone: Evidence of
squirt flow, J. Geophys. Res.-Sol. Ea., 120, 7526–7535,
2015. a
Tillotson, P., Sothcott, J., Best, A. I., Chapman, M., and Li, X.-Y.:
Experimental verification of the fracture density and shear-wave splitting
relationship using synthetic silica cemented sandstones with a controlled
fracture geometry, Geophys. Pros., 60, 516–525, 2012. a
Tillotson, P., Chapman, M., Sothcott, J., Best, A. I., and Li, X.-Y.: Pore
fluid viscosity effects on P-and S-wave anisotropy in synthetic
silica-cemented sandstone with aligned fractures, Geophys. Pros.,
62, 1238–1252, 2014. a
Trofimov, A., Drach, B., Kachanov, M., and Sevostianov, I.: Effect of a partial
contact between the crack faces on its contribution to overall material
compliance and resistivity, Int. J. Solids Struct.,
108, 289–297, 2017. a
Tsvankin, I.: Seismic signatures and analysis of reflection data in anisotropic
media, Society of Exploration Geophysicists, 459 pp., 2012. a
Tsvankin, I. and Grechka, V.: Seismology of azimuthally anisotropic media and
seismic fracture characterization, Society of Exploration Geophysicists,
511 pp., 2011. a
Vieira, R. T., de Bortoli, D., de Carvalho, M. V., and Pires, F. A.: The role
of elastic anisotropy on the macroscopic constitutive response and yield
onset of cubic oligo-and polycrystals, Int. J. Plasticity, https://doi.org/10.1016/j.ijplas.2019.06.007,
2019. a
Zhang, Y. and Toksöz, M. N.: Computation of dynamic seismic responses to
viscous fluid of digitized three-dimensional Berea sandstones with a coupled
finite-difference method, J. Acoust. Soc. Am.,
132, 630–640, 2012. a
Zhang, Y., Song, L., Deffenbaugh, M., and Toksöz, M. N.: A finite
difference method for a coupled model of wave propagation in poroelastic
materials, J. Acoust. Soc. Am., 127, 2847–2855,
2010. a
Short summary
We perform a three-dimensional numerical study of the fluid–solid deformation at the pore scale. We show that seismic wave velocities exhibit strong azimuth-, angle- and frequency-dependent behavior due to squirt flow between interconnected cracks. We conclude that the overall anisotropy mainly increases due to squirt flow, but in some specific planes it can locally decrease as well as increase, depending on the material properties.
We perform a three-dimensional numerical study of the fluid–solid deformation at the pore...
