Results 201 to 210 of about 87,357 (239)
The geology and geochemistry of the Pilot-Smuggler shear zone, Rice Lake area, Manitoba
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Pure and Applied Geophysics, 1998
A brief outline is given on experimental studies carried out in the Minnesota Mineral and Rock Physics Laboratory of microstructural evolution and rheology of mantle mineral aggregates or their analogues, using a simple shear deformation geometry.
Shun-Ichiro Karato, D L Kohlstedt
exaly +3 more sources
A brief outline is given on experimental studies carried out in the Minnesota Mineral and Rock Physics Laboratory of microstructural evolution and rheology of mantle mineral aggregates or their analogues, using a simple shear deformation geometry.
Shun-Ichiro Karato, D L Kohlstedt
exaly +3 more sources
Tectonophysics, 1997
Abstract A geostatistical approach is used to analyze the spatial distribution of fracture density in shear zones. The methodology proposed is illustrated with data obtained from the mapping of drift walls at the Henderson mine in the Chibougamau mining district, Quebec.
Denis Marcotte
exaly +2 more sources
Abstract A geostatistical approach is used to analyze the spatial distribution of fracture density in shear zones. The methodology proposed is illustrated with data obtained from the mapping of drift walls at the Henderson mine in the Chibougamau mining district, Quebec.
Denis Marcotte
exaly +2 more sources
Predictions of shear-wave velocities in southern California using surface geology
Bulletin of the Seismological Society of America, 1998AbstractA new model of the average shear-wave velocity in the uppermost 30 m has been generated by extrapolation of discrete velocity profiles using surface geology at several scales. Statistical methods have been applied to create a map that is no more complicated than is supported by the velocity data; several geologic units with similar responses ...
Stephen Park, Scott Elrick
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International Journal of Earth Sciences, 2009
The Higher Himalayan Shear Zone (HHSZ) in the Sutlej section reveals (1) top-to-SW ductile shearing, (2) top-to-NE ductile shearing in the upper- and the lower strands of the South Tibetan Detachment System (STDSU, STDSL), and (3) top-to-SW brittle shearing corroborated by trapezoid-shaped minerals in micro-scale. In the proposed extrusion model of the
Soumyajit Mukherjee, Hemin Koyi
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The Higher Himalayan Shear Zone (HHSZ) in the Sutlej section reveals (1) top-to-SW ductile shearing, (2) top-to-NE ductile shearing in the upper- and the lower strands of the South Tibetan Detachment System (STDSU, STDSL), and (3) top-to-SW brittle shearing corroborated by trapezoid-shaped minerals in micro-scale. In the proposed extrusion model of the
Soumyajit Mukherjee, Hemin Koyi
exaly +3 more sources
A Site-Conditions Map for California Based on Geology and Shear-Wave Velocity
Bulletin of the Seismological Society of America, 2000One simple way of accounting for site conditions in calculating seismic hazards is to use the shear-wave velocity in the shallow subsurface to classify materials. The average shear-wave velocity to 30 m ( V 30s) has been used to develop site categories that can be used for modifying a calculated ground motion to account for site conditions.
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Geology and genesis of Nalunaq Palaeoproterozoic shear zone-hosted gold deposit, South Greenland
Transactions of the Institution of Mining and Metallurgy Section B-Applied Earth Science, 2000AbstractThe Nalunaq deposit is a shear zone-hosted gold deposit characterized by very high grades (up to 5240 g Au/t over 0.8 m). The host rocks are Palaeoproterozoic metabasic rocks of the Nanortalik Nappe, which is part of the Ketilidian Mobile Belt. The Nanortalik Nappe consists of bedded massive pyrrhotite/graphitic chert horizons overlain by fine ...
K. Kaltoft, D. M. Schlatter, L. Kludt
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Bulletin of Engineering Geology and the Environment, 2018
The shear strength of soils is influenced by various geological parameters. Following the shear strength study of Norwegian tills by Opsal (2017), this study presents test results of a selection of such parameters, i.e., particle size distribution, particle shape, and the mineralogical composition, of 33 till samples (fractions
Øystein Lid Opsal +1 more
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The shear strength of soils is influenced by various geological parameters. Following the shear strength study of Norwegian tills by Opsal (2017), this study presents test results of a selection of such parameters, i.e., particle size distribution, particle shape, and the mineralogical composition, of 33 till samples (fractions
Øystein Lid Opsal +1 more
exaly +2 more sources
New Zealand Journal of Geology, and Geophysics, 2019
ABSTRACT Ore deposits are formed by a variety of processes, and mineralised host rocks possess unusual petrophysical properties in contrast to un‐mineralised country rock. Mineralised systems can therefore be identified directly in geophysical data via anomalous geophysical responses.
Casey C Blundell +2 more
exaly +3 more sources
ABSTRACT Ore deposits are formed by a variety of processes, and mineralised host rocks possess unusual petrophysical properties in contrast to un‐mineralised country rock. Mineralised systems can therefore be identified directly in geophysical data via anomalous geophysical responses.
Casey C Blundell +2 more
exaly +3 more sources