shear zones
Postseismic deformation and the strength of ductile shear zones
... simple shear zone model and assuming wet quartzite rheology, I show that such stress levels are not compatible with a km-scale shear zone, in spite of the geological evidence for localized deformation in ...
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On the geoelectric structure of major strike slip faults and shear zones
... To image such features presents a challenge to all surface-based geophysical methods because (a) the effect of fluids on seismic velocity, density or resistivity will dimin- ish as increased pressure generally reduces ...
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Scale-dependent influence of pre-existing basement shear zones on rift faulting : a case study from NE Brazil
... Piranhas shear zone and would promote non-coplanar fault segments, requiring steps and jogs to develop as faults accumulate ...slip zones that are non-planar and non-parallel to the initial ...with ...
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Wide shear zones and the spot model: Implications from the split-bottom geometry
... narrow shear zones which essentially go straight up, rather than bend inwards as is found in experiments and according to the torque bal- ance argument ...
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Analysis And Interpretation Of Shear Zones In Kaladgi Basin Exposed At And Around Sirasangi, Belgaum District, Karnataka, India
... Shear zones differ from joints, in being irregular with respect to trends, inclination and ...Usually shear zone occur near to fault plane as the bedding planes are disturbed the appearance of ...
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Continuum approach to wide shear zones in quasistatic granular matter
... solid friction can be made, and further indicated how far such an analogy can be stretched. Due to that the flow could be considered as consisting of SFSs, no special assumptions had to be made regarding the effect of a ...
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Strain localisation within ductile shear zones beneath active faults: The Alpine Fault contrasted with the adjacent Otago fault system, New Zealand
... large shear strains and intense strain ...lacking zones of strongly localised creep beneath each ...distributed shear without a zone of highly localised ...weak zones within the upper crust ...
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Reconnaissance study on gold mineralization at abu khalag area, Bayuda desert, Sudan
... ductile shear zones with low angle to high angle reverse to strike-slip ...Foliated zones or (iii) foliated hinges in ductile turbidites sequences (Groves et ...
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Deformation mechanisms and evolution of the microstructure of gouge in the Main Fault in Opalinus Clay in the Mont Terri rock laboratory (CH)
... to shear zone dip, bright wall rock clasts and S-C ...to shear zone dip, no wall rock clasts and several grain ...thin shear zones and wider shear bands (< 50 µm) mostly in the R, P ...
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Effects of fluid-rock interaction on shear zone evolution in Proterozoic granites on King Island, Tasmania
... Dynamically recrystallized grain sizes from shear zones on the north coast of King Island indicate plastic deformation occurred at flow stresses between 30 and 75 MPa.. Smaller dynamical[r] ...
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New Approach of Structural Setting of Gold Deposits in Birimian Volcanic Belt in West African Craton: The Example of the Sabodala Gold Deposit, SE Senegal
... Northwest shear zones are localized in the “volcaniclastic” and adjacent mylonitic chert units where they are affected by extensive al- bite-carbonate-pyrite alteration and quartz-carbonate-albite vein ...
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Permeability and seismic velocity anisotropy across a ductile–brittle fault zone in crystalline rock
... The models for elasticity and permeability through brittle and ductile shear zones have been mostly derived from out- crop examples (Faulkner et al., 2010, and references therein). To date, there have been ...
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Metamorphic History of Staurolite-Kyanite-Garnet-Cordieritebearing Pelites of Mangalore-Mercaka Lineament, South India
... A similar scenario can be invoked for the grt-ky association near Jalsoor and Siddapura areas, as these shear zones also bound the Coorg granulite block.. Furthcr-, younger[r] ...
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Structures and Styles of Deformation in Rift, Ridge, Transform Zone, Oblique Rift and a Microplate Offshore/Onshore North Iceland
... the shear fractures of the trans- form zone and the oblique rift 2/3 of the fracture ...deep-seated shear zones indicate dextral slip on WNW to NW, and sinistral slip on NNE to ENE faults, ...
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Petrogenesis of Mount Dore-style breccia-hosted copper ± gold mineralization in the Kuridala-Selwyn region of northwestern Queensland
... that shear zones are present in pelitic rocks adjacent to these ...layer-parallel shear zone (the Starra Shear) up to one kilometre thick, containing the Starra Ironstones, and extending into ...
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Meißner, Birgit (2001): Tektonometamorphe Entwicklung von Scherzonen im präkambrischen Basement Südindiens: Sm-Nd-, Rb-Sr- und U-Pb-Isotopenuntersuchungen an den Moyar-, Bhavani-, Palghat- und Kollegal-Scherzonen. Dissertation, LMU München: Fakultät für Geowissenschaften
... In the South Indian basement, several crustal-scale amphibolite facies shear zones occur between high-grade metamorphic units with a different geological history: the EW-trending Moyar [r] ...
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Structural Control of Auriferous Mineralization in the Birimian: Case of the Agbahou Deposit in the Region of Divo, Côte d’Ivoire
... The shear zones of Agbahou, Sabodala in Senegal (Sylla and N’gom, 1997 [42]), Abawso in Ghana (Wille and Klemd 2004 [37]) and Taparko in Burkina Faso (Bourges et al ...sinistral shear has evolved ...
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Influence of double idealized shear flow zones on the torsional resistance in fibrous normal strength concrete beams
... Under-reinforced fibrous normal strength concrete beams were tested under pure torsional moment. The Universal Testing Machine of 500 kN capacity in the Structural Laboratory in the School of Civil Engineering was used ...
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Maritime War Zones & Exclusion Zones
... 34 In reality the German submarine logistical strategy, which began with a smaller submarine fleet, in 1914, than that of the United Kingdom (28 for Germany and 56 for Great Br[r] ...
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Evolution of Free Economic Zones: A Functional Taxonomy
... of zones go beyond simple trading to include manufacturing, services and finally the modern all-in-one zones that combine all these operations and residential ...of zones, time frame and stage of ...
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