Results 11 to 20 of about 52,091 (262)

Kinematics and Timing Constraints in a Transpressive Tectonic Regime: The Example of the Posada-Asinara Shear Zone (NE Sardinia, Italy)

open access: yesGeosciences, 2020
Detailed geological field mapping, integrated with meso- and microstructural investigations, kinematic of the flow and finite strain analyses, combined with geochronology, are fundamental tools to obtain information on the temperature–deformation–timing ...
Rodolfo Carosi   +5 more
doaj   +1 more source

MINERALOGY AND RADIOACTIVITY OF EL-ROSIS SHEAR ZONE, SOUTHERN SINI, EGYPT. [PDF]

open access: yesDelta Journal of Science, 2007
Ei-Rosis area is mainly covered by syeno- and alkali feldspar granites intruded into the granodiorites with sharp contacts. The alkali feldspar granite is dissected by WNW-ESE shear zone along which alteration products such as hematitization and ...
A.H.A. Bishr   +3 more
doaj   +1 more source

Quantitative Evaluation of Soil Structure and Strain in Three Dimensions under Shear Using X-ray Computed Tomography Image Analysis

open access: yesJournal of Imaging, 2021
The objective of this study is to quantitatively evaluate the soil structure behavior when under shear stress to understand the mechanism of shear zone formation using a micro-focus X-ray computed tomography (CT) scanner to visualize the internal samples
Shintaro Nohara, Toshifumi Mukunoki
doaj   +1 more source

Mesoscopic response mechanism of shear surface roughness and residual strength in gravelly sliding zone soils

open access: yesYantu gongcheng xuebao, 2021
The mechanical properties of the gravelly sliding zone soils are closely related to the meso-structure of the shear surface. The quantitative characterization of shear surface roughness is of great significance to revealing the meso-mechanism of change ...
REN San-shao 1, 2, 3, ZHANG Yong-shuang 1, 3, XU Neng-xiong 2, WU Rui-an 4
doaj   +1 more source

Impact of Shear Zone on Rockburst in the Deep Neelum-Jehlum Hydropower Tunnel: A Numerical Modeling Approach

open access: yesEnergies, 2018
Rockburst is a hazardous phenomenon in deep tunnels influenced by geological structural planes like faults, joints, and shear planes. Small-scale shear-plane-like structures have damaging impact on the boundaries of the tunnel, which act as barrier and ...
Abdul Muntaqim Naji   +3 more
doaj   +1 more source

STRESS FIELD IN A SHEAR ZONE, AND FORMATION OF THE MAIN FAULT

open access: yesГеодинамика и тектонофизика, 2021
Using the analytical approximation method, we calculated stress field parameters for cases with different relative positions of Riedel shears and loads required for shearing.
A. S. Lermontova
doaj   +1 more source

MODELLING HEAT GENERATION DURING FRICTION AND VISCOPLASTIC DEFORMATION BASED ON THE EXAMPLE OF THE YENISEI SHEAR ZONE (EASTERN SIBERIA)

open access: yesГеодинамика и тектонофизика, 2021
Deviations of the РТ parameters from the background values, corresponding to the lithostatic pressure and the standard geotherm characteristic of the neighboring crustal blocks of the Yenisei Ridge, were recorded by geothermobarometry in the zones of ...
O. P. Polyansky   +3 more
doaj   +1 more source

Refraction of Shear Zones in Granular Materials [PDF]

open access: yesPhysical Review Letters, 2007
4 pages, 3 figures, minor changes, jounal ref ...
openaire   +3 more sources

San-in shear zone in southwest Japan, revealed by GNSS observations

open access: yesEarth, Planets and Space, 2017
A right-lateral shear zone in the San-in region, southwest Japan, has been proposed by previous geological and seismological studies. It locates 350 km north of the Nankai Trough, that is, the main plate boundary between the subducting Philippine Sea and
Takuya Nishimura, Youichiro Takada
doaj   +1 more source

Geology of late-Variscan Sàrrabus pluton (south-eastern Sardinia, Italy)

open access: yesJournal of Maps, 2021
This paper deals with the geological mapping of the late-Variscan Sàrrabus pluton, (south-eastern Sardinia), a shallow multiple and composite igneous complex dominated by several generations of granodiorites, metaluminous and peraluminous granites and ...
F. Secchi   +7 more
doaj   +1 more source

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