These stresses produce changes both in the shape and volume of the rock, and in the shape and volume of the voids i.e. We use a quasi‐static rock fracture experiment combi... During the past decade, enhanced oil recovery (EOR) by CO2 in shale oils has received substantial attention. Fault reactivation was triggered by injecting fluids through a borehole directly connected to the fault. located near the southern end of the creeping section of the San Andreas

permeability and connectivity within fault zones, which can lead to fluid-rock chemical interaction represented as mineral precipitation in mesh veins and/or mineralogical changes (alteration) of the host rock. The Gole Larghe Fault Zone (GLFZ) in the Italian Southern Alps has been Commonly, the interaction between fluid-flow migration and host rock is reflected as mineral precipitation in a vein mesh and/or as mineralogical changes (alteration) of the host rock. properties is therefore important in understanding various many key In nature, permeability is enhanced in the damage zone of faults in crystalline rocks, where fracturing occurs on a wide range of scales. The examined site has a strongly asymmetric damage structure with respect to the SAF core.... Fractures are ubiquitous on all scales in crustal rocks. London - WC1E 6BT, http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php, https://www.ucl.ac.uk/hr/helpdesk/helpdesk_web_form.php, Reader in Earthquake Geology and Rock Physics. Join ResearchGate to find the people and research you need to help your work. [email protected]: 020 73108 6348 (56348) Research Summary.

Field and numerical studies consistently show that the maximum per-meability correlates with the direction of greatest fracture connectivity, generally corresponding to the orientation at which f... During the past decade, enhanced oil recovery (EOR) by CO2 in shale oils has received substantial attention. cataclasites associated with pseudotachylytes (solidified frictional Here we describe, to our knowledge, the first pseudotachylytes ever found in South America.

However, a fundamental limitation of the Mohr-Coulomb fa... A layer of substantially non-crystalline material, composed of partially annealed nanopowder with local melt, was experimentally generated by comminution during ∼1.5 mm total slip at ∼2.5x10−6 ms−1, Pconf ∼ 0.5 GPa, and 450°C or 600°C, on sawcut surfaces in novaculite. Quantification of these individual components is crucial to understand the physics of rupture. traditional sources of errors that affect more permeable formations (e.g. (2011, Tectonophysics) showed that macro-fracture... Conjugate, or bimodal, fault patterns dominate the geological literature on shear failure. The relationship between hydrothermal fluids and fault development is studied through a petrographic analysis of faulted veins in an open-pit copper mine, Radomiro Tomic (RT), northern Chile. Recent geochronologic data indicated that the emplacement of the slide event occurred at ∼48.9 Ma, using laser ablation inductively coupled p... Seismogenic fault fracturing can create considerable fracture permeability in and around fault zones initiating large fluxes of fluid, particularly at fault terminations and dilatational jogs. However, re-fracking has been recognised as a challenging strategy due to adverse environmental impacts. The so-called “brittle-ductile transition” is thought to be the strongest part of the lithosphere, and defines the lower limit of the seismogenic zone. The energy released during earthquake rupture is partly radiated as seismic waves and mostly dissipated by frictional heating on the fault interface and by off‐fault fracturing of surrounding host rock. to, University College London - Gower Street - During its emplacement more than of Paleozoic sedimentary and Eocene volcanic rocks slid on a basal detachment surface dipping 2°, leading to 100 yr of debate regarding the emplacement mechanisms. strain localization in brittle-to-ductile shear zones. In this work we show that fluids can also be channeled and potentially mixed through a network of interconnected high-angle microfractures generated by trans... We present a comparative study of crack damage evolution in dry sandstone under both conventional (σ1 > σ2 = σ3), and true triaxial (σ1 > σ2 > σ3) stress conditions using results from measurements made on cubic samples deformed in three orthogonal directions with independently controlled stress paths. Thomas Mitchell Reader in Earthquake Geology and Rock Physics at UCL London, United Kingdom 397 connections Samples were subjected to both a single heating and cooling cycle and multiple heating/cooling cycles to different peak te... Main points: • The majority of thermal crack damage is produced during heating in the coarse-grained granophyre, but during cooling in the finer-grained andesite and basalt. Although geological, seismological, and geophysical evidence indicates that fracture damage and physical properties of fault-related rocks are intimately linked, their relationships remain poorly constrained.

pseudotachylytes (frictional melts) formed along pre-existing magmatic Only verified researchers can join ResearchGate and send messages to other members. Japan Agency for Marine-Earth Science Technology, Microstructural Controls on Thermal Crack Damage and the Presence of a Temperature-Memory Effect During Cyclic Thermal Stressing of Rocks, Microstructural controls on thermal crack damage and the presence of a temperature-memory effect during cyclic thermal stressing of rocks, Novel laboratory investigation of huff-n-puff gas injection for shale oils under realistic reservoir conditions, Mesoscopic Damage and Fracturing of Heterogeneous Brittle Rocks Based on Three-dimensional Polycrystalline Discrete Element Method, NON-LINEAR ANISOTROPIC DAMAGE RHEOLOGY MODEL: THEORY AND EXPERIMENTAL VERIFICATION, Off‐Fault Damage Characterization During and After Experimental Quasi‐Static and Dynamic Rupture in Crustal Rock From Laboratory P Wave Tomography and Microstructures, Off-fault damage characterisation during and after experimental quasi-static and dynamic rupture in crustal rock from laboratory P-wave tomography and microstructures, Mesoscopic time-dependent behavior of rocks based on three-dimensional discrete element grain-based model, Variation of Hydraulic Properties Due to Dynamic Fracture Damage: Implications for Fault Zones, An analysis of the factors that control fault zone architecture and the importance of fault orientation relative to regional stress, Damage zone heterogeneity on seismogenic faults in crystalline rock; a field study of the Borrego Fault, Baja California, Earthquake lubrication and healing explained by amorphous nanosilica, Pseudotachylytes from the Atacama Desert (Northern Chile), The Imaging Resolution and Knudsen Effect on the Mass Transport of Shale Gas Assisted by Multi-length Scale X-Ray Computed Tomography, Interaction between hydrothermal fluids and fault systems in the in the Southern Andes revealed by magnetotelluric and seismic data, Longitudinal ridges imparted by high-speed granular flow mechanisms in martian landslides, Fault reactivation and strain partitioning across the brittle-ductile transition, A three-dimensional numerical meso-approach to modeling time- independent deformation and fracturing of brittle rocks, Rupture Energetics in Crustal Rock From Laboratory‐Scale Seismic Tomography, An Improved Understanding About CO2 EOR and CO2 Storage in Liquid-Rich Shale Reservoirs, A Collective Effort to Identify and Quantify Geo-Energy Risks, The Temperature Dependence of Sandstone Compaction, Fault-fluid interaction in porphyry copper hydrothermal systems: Faulted veins in radomiro Tomic, northern Chile, FRICTION EXPERIMENTS ON ANORTHOSITE GOUGES: IMPLICATIONS FOR THE MECHANISMS OF LONG RUNOUT LANDSLIDES ON THE MOON, Mechanical architecture and dynamic evolution of caldera faults, Architecture of an exceptionally exposed seismogenic source: The Bolfin Fault Zone (Atacama Desert, Chile), Imaging crack and pore anisotropy in deformed rocks: Quantifying the crack fabric tensor, The permeability of fracture intersections in basalt, A New Mechanism for Enhanced Oil Recovery by CO2 in Shale Oil Reservoirs, Microstructural controls on thermal crack damage during temperature-cycling experiments on volcanic rocks, Fault Reactivation by Fluid Injection: Controls From Stress State and Injection Rate, Author Correction: Quantifying the anisotropy and tortuosity of permeable pathways in clay-rich mudstones using models based on X-ray tomography, Absence of Stress-Induced Anisotropy During Brittle Deformation in Antigorite Serpentinite, Caracterización litoestratigráfica de la Cordillera Principal del alto Teno: aportes al entendimiento del estilo de deformación del Sistema de Falla el Fierro durante el Cenozoico Superior, Understanding the tectono-magmatic system of the Transitional Southern Volcanic Zone (TSVZ), Chilean Andes, from seismicity analysis, The nature and origin of off-fault damage surrounding strike-slip fault zones over a wide range of scales, Diffusion Profiles Around Quartz Clasts as Indicators of the Thermal History of Pseudotachylytes, Fault reactivation by fluid injection: Controls from stress state and injection rate, Assessing the Efficiency of Thermal Pressurization Using Natural Pseudotachylyte-Bearing Rocks, The Relationship Between Microfracture Damage and the Physical Properties of Fault-Related Rocks: The Gole Larghe Fault Zone, Italian Southern Alps, KG2B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite-Part 2: Modelling, microstructures and complementary data, KG2B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: Measurements, pressure dependence and pore-fluid effects, A Directional Crack Damage Memory Effect in Sandstone Under True Triaxial Loading, Absence of Stress-induced Anisotropy during Brittle Deformation in Antigorite Serpentinite, Assessing the efficiency of thermal pressurisation using natural pseudotachylyte-bearing rocks, Comparing crack damage evolution in rocks deformed under conventional and true triaxial loading, ORIGIN OF LONGITUDINAL RIDGES AND FURROWS ASSOCIATED WITH LONG RUNOUT LANDSLIDES: THE CASE STUDY OF A MARTIAN LANDSLIDE, Heterogeneity in the Fault Damage Zone: a Field Study on the Borrego Fault, B.C., Mexico, Characterization of the Fault Core and Damage Zone of the Borrego Fault, 2010 M7.2 Rupture, Exploring the traces of fault-related microstructural damage at the Santorini caldera, Evidence of Na- and Mg-rich Hydrothermal Brines Driving Chloritization and Albitization in an Active Fault Zone: Case Study of the Borrego Fault, Baja CA, Mexico, The effect of offset on fracture permeability of rocks from the Southern Andes Volcanic Zone, Chile, Insights into anisotropy development and weakening of ice from in situ P wave velocity monitoring during laboratory creep: VELOCITY MONITORING DURING CREEP IN ICE, Volcanic Initiation of the Eocene Heart Mountain Slide, Wyoming, USA, Fluid Inclusion Evidence of Coseismic Fluid Flow Induced by Dynamic Rupture, in Fault Zone Dynamic Processes: Evolution of Fault Properties During Seismic Rupture, A Preliminary Analysis of Edge-effects in True-triaxially Deformed Cubic Darley Dale Sandstone Samples, Acoustic characterization of crack damage evolution in sandstone deformed under conventional and true triaxial loading: Crack damage evolution in sandstone, Decoding micro-structural damage related to caldera collapse at Santorini Volcano, An Integrated Tensorial Approach for Quantifying Porous, Fractured Rocks, Static versus dynamic fracturing in shallow carbonate fault zones, The effect of water on strain localization in calcite fault gouge sheared at seismic slip rates, Influence of gouge thickness and grain size on permeability of macro-fractured basalt, Fault welding by pseudotachylyte formation, The Influence of Offset and Gouge on Permeability in Macro-Fractured Basalt, The influence of gouge and pressure cycling on permeability of macro-fracture in basalt, Dynamic fracturing by successive coseismic loadings leads to pulverization in active fault zones, Palaeopermeability structure within fault-damage zones: A snap-shot from microfracture analyses in a strike-slip system, Multi Physics Modeling Of Hydraulic Fracturing and Fluid Transfer in Fractured Porous Medium to Monitoring Enhanced Oil Recovery and Engineering Geothermal System, The Cenzonic tectonic evolution and genetic mechanism of Liaodong Bay Depression, East China, THE INFLUENCE OF PERMEABILITY ANISOTROPY ON THE DISTRIBUTION OF PORE FLUID PRESSURE AROUND FAULT ZONES: INSIGHTS FOR FAULT STABILITY AND REACTIVATION, Influence of fracture fill on permeability in macro-fractured basalt, Polymodal faulting: Time for a new angle on shear failure, Crystallographic preferred orientations may develop in nanocrystalline materials on fault planes due to surface energy interactions, Catastrophic emplacement of giant landslides aided by thermal decomposition: Heart Mountain, Wyoming, Clast-cortex aggregates in experimental and natural calcite-bearing fault zones, Dynamic weakening of serpentinite gouges and bare-surfaces at seismic slip rates, Hydrothermal alteration in an exhumed crustal fault zone: Testing geochemical mobility in the Caleta Coloso Fault, Atacama Fault System, Northern Chile, Hydrothermal alteration in an exhumed crustal fault zone: Geochemical mobility in the Caleta Coloso Fault, Atacama Fault System, Northern Chile, The damage and geochemical signature of a crustal scale strike-slip fault zone, The structure of an exhumed intraplate seismogenic fault in crystalline basement, Damage and seismic velocity structure of pulverized rocks near the San Andreas Fault, Influence of macro-fractures and fault gouge on permeability in basalt, Frictional behavior and BET surface-area changes of SAFOD gouge at intermediate to seismic slip rates, Damage, permeability and sealing processes of an exhumed seismic fault zone; The Gole Larghe Fault Zone, Italian Alps, Geochemistry and fluid inclusions across a crustal strike-slip Mesozoic fault: insights of fluid-flow / rock interaction in the Atacama Fault System, Coseismic damage and softening of fault rocks at seismogenic depths, Towards quantifying the permeability of fault damage zones in low porosity rocks, Experimental generation of volcanic pseudotachylytes: Constraining rheology, The contribution of structural geology, experimental rock deformation and numerical modelling to an improved understanding of the seismic cycle Preface to the Special Volume "Physico-chemical processes in seismic faults".