Results 1 to 10 of about 211,728 (301)

Water pumping in mantle shear zones [PDF]

Nature Communications, 2017
Water plays a key role in many geological processes, including weakening crystals in the crust and mantle. Here, using amphibole distribution and olivine dislocation slip-systems, the authors show that ductile flow also has a dynamic control on water ...
Jacques Précigout, Cécile Prigent, Laurie Palasse, Anthony Pochon   +3 more
doaj   +7 more sources

Refraction of shear zones in granular materials [PDF]

Physical Review Letters, 2007
We study strain localization in slow shear flow focusing on layered granular materials. A heretofore unknown effect is presented here. We show that shear zones are refracted at material interfaces in analogy with refraction of light beams in optics. This
J. Christoffersen, R. F. Craig, S. Luding, Tamás Unger   +3 more
core   +3 more sources

Local shear mechanical behavior of rock joint under constant normal load [PDF]

Scientific Reports
The shear mechanical behavior of joint surfaces is crucial for the safety and stability of rock engineering. Under constant normal load (CNL) conditions, the boundary element method is employed to calculate the distribution of normal contact forces.
Wanlin Wang, Haichun Ma, Changlin Dai, Jiazhong Qian   +3 more
doaj   +2 more sources

Evolution of shear zones in granular materials [PDF]

Physical Review E, 2014
The evolution of wide shear zones (or shear bands) was investigated experimentally and numerically for quasistatic dry granular flows in split bottom shear cells. We compare the behavior of materials consisting of beads, irregular grains (e.g.
Angenstein, Frank, Borzsonyi, Tamas, Bose, Axel, Rose, Georg, Somfai, Ellak, Stannarius, Ralf, Szabo, Balazs, Torok, Janos, Wegner, Sandra   +8 more
core   +4 more sources

Shear-Induced Graphitization in Tongyuanpu Shear Zone, Liaodong Peninsula of Eastern China: Insights from Graphite Occurrences, Nanostructures and Carbon Sources [PDF]

Nanomaterials
An in-depth study of the genetic mechanisms of graphite in shear zones is crucial for understanding crustal weakening and the origins of inorganic carbon.
Mengyan Shi, Nannan Cheng, Jianbin Li, Quanlin Hou, Qianqian Guo, Jienan Pan   +5 more
doaj   +2 more sources

Strain Partitioning along Terrane Bounding and Intraterrane Shear Zones: Constraints from a Long-Lived Transpressional System in West Gondwana (Ribeira Belt, Brazil)

Lithosphere, 2022
Shear zones are zones of localized high strain accommodating differential motion in the lithosphere and impacting the crustal rheology and deformational history of orogenic belts.
F. M. Faleiros, B. V. Ribeiro, G. A. C. Campanha, P. A. Cawood, D. I. G. Cabrita, M. T. A. G. Yogi, L. A. Milani, D. V. Lemos-Santos, V. V. Almeida, S. W. O. Rodrigues, I. S. Malta, A. J. Forero-Ortega   +11 more
doaj   +1 more source

The Borborema Strike-Slip Shear Zone System (NE Brazil): Large-Scale Intracontinental Strain Localization in a Heterogeneous Plate

Lithosphere, 2021
Large-scale strike-slip faults are fundamental tectonic elements of the continental lithosphere. They constitute plate boundaries (continental transforms), separate terranes with contrasting geological histories within accretionary orogens, or ...
Sergio P. Neves, Andréa Tommasi, Alain Vauchez, Thais Andressa Carrino   +3 more
doaj   +1 more source

Microstructures and deformation mechanisms in Opalinus Clay: insights from scaly clay from the Main Fault in the Mont Terri Rock Laboratory (CH) [PDF]

Solid Earth, 2017
The Main Fault in the shaly facies of Opalinus Clay is a small reverse fault formed in slightly overconsolidated claystone at around 1 km depth. The fault zone is up to 6 m wide, with micron-thick shear zones, calcite and celestite veins, scaly clay and ...
B. Laurich, J. L. Urai, C. Nussbaum
doaj   +1 more source

Friction of Shear-Fracture Zones [PDF]

Physical Review Letters, 2017
A shear fracture of brittle solids under compression undergoes a substantial evolution from the initial microcracking to a fully formed powder-filled shear zone. Experiments covering the entire process are relatively easy to conduct, but they are very difficult to investigate in detail. Numerically, the large strain limit has remained a challenge.
Pylväinen, J. I., Åström, J., Riikilä, Timo   +3 more
openaire   +4 more sources

A pilot Rb-Sr dating of the Suomusjärvi ultramylonite: evidence for major post-Svecofennian deformation in SW Finland [PDF]

Bulletin of the Geological Society of Finland, 1991
The Suomusjärvi shear zone in the West Uusimaa area in the Proterozoic Svecofennides of SW Finland belongs to a group of late, post-peak metamorphic structures comprising vertical shear zones and folds with vertical fold axes.
M. Ploegsma
doaj   +1 more source