Results 251 to 260 of about 211,728 (301)
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Physical Review E, 2002
We present some experimental and numerical results based on a simple model designed to give an estimate for the width of a shear zone. We conclude that the observed finite size of the shear zone can be associated with the propagation of the force lines inside the medium.
Bertrand, Francois +2 more
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We present some experimental and numerical results based on a simple model designed to give an estimate for the width of a shear zone. We conclude that the observed finite size of the shear zone can be associated with the propagation of the force lines inside the medium.
Bertrand, Francois +2 more
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Laminar flow in shear zones: the Pernambuco Shear Zone, NE-Brazil
Journal of Structural Geology, 1995Abstract The Pernambuco Shear Zone (PSZ) is a 700 km long branch of one of the largest and best-exposed Precambrian strike-slip shear zone systems in the world. The shear zones are part of the eroded record of a large-scale collision zone. Foliation and lineation orientations along the shear zone indicate that local deformation perturbations have ...
Ian Davison +4 more
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Géotechnique, 2008
The behaviour of landslides in clay is essentially governed by a shear zone located at the base of the soil mass. While some data regarding the shear zones of slides are available, information is rather poor about the shear zones of mudslides. The paper reports some results of investigations on the shear zone located at the base of a mudslide, showing
COMEGNA, Luca, PICARELLI, Luciano
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The behaviour of landslides in clay is essentially governed by a shear zone located at the base of the soil mass. While some data regarding the shear zones of slides are available, information is rather poor about the shear zones of mudslides. The paper reports some results of investigations on the shear zone located at the base of a mudslide, showing
COMEGNA, Luca, PICARELLI, Luciano
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Geological Magazine, 2022
AbstractThe Singhbhum Shear Zone in eastern India hosts several Fe oxide–Cu–Au (IOCG)-type polymetallic deposits, mined primarily for U, Cu and apatite, with elevated concentrations of rare earth elements, Ni, Co, Mo, Te and Au in association with low-Ti magnetite. Although the main stages of hydrothermal U, Cu and rare earth element mineralization are
Dipak C Pal +2 more
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AbstractThe Singhbhum Shear Zone in eastern India hosts several Fe oxide–Cu–Au (IOCG)-type polymetallic deposits, mined primarily for U, Cu and apatite, with elevated concentrations of rare earth elements, Ni, Co, Mo, Te and Au in association with low-Ti magnetite. Although the main stages of hydrothermal U, Cu and rare earth element mineralization are
Dipak C Pal +2 more
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The South Armorican Shear Zone
Journal of Structural Geology, 1980Abstract The main lithological features and structural relations of the South Armorican Shear Zone (S.A.S.Z.) are described and the evolution of physical conditions during deformation is outlined. Age constraints on the timing of shearing deformation are discussed and an attempt is made to place the S.A.S.Z. in its regional geodynamic context.
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Journal of Geophysical Research: Oceans, 1978
At Geochemical Ocean Sections Study station 28, in the basin east of the Newfoundland Ridge, dramatic evidence for the ‘underthrusting’ of the benthic boundary layer was encountered. Results from the continuous temperature, salinity, and nephel measurements and from discrete water samples are presented in order to document that strong shearing within ...
Wallace S. Broecker, Arnold Bainbridge
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At Geochemical Ocean Sections Study station 28, in the basin east of the Newfoundland Ridge, dramatic evidence for the ‘underthrusting’ of the benthic boundary layer was encountered. Results from the continuous temperature, salinity, and nephel measurements and from discrete water samples are presented in order to document that strong shearing within ...
Wallace S. Broecker, Arnold Bainbridge
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Restraining bends in high temperature shear zones: The “Central Cameroon Shear Zone”, Central Africa
Journal of African Earth Sciences, 2008Abstract A detailed structural study of the Central Cameroon Shear Zone (CCSZ) segment, in the Bamoun plateau (BP) and the Tikar plain (TP) (West Cameroon), reveals a complex strain geometry of this shear zone. It shows thick mylonite bands wrapping around lenses of various country rock types, at small, medium and large scales. The mylonite foliation
Njonfang, E. +4 more
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Deformation in a complex crustal-scale shear zone: Errabiddy Shear Zone, Western Australia
Geological Society, London, Special Publications, 2004Abstract Detailed mapping of four areas representing different geological units with varying formation histories within the crustal-scale Errabiddy Shear Zone shows an apparently simple temporal progression from foliation and mineral lineation development to folding and then to brittle deformation across the shear zone. However, in detail the
Occhipinti, Sandra, Reddy, Steven
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Ductile Shearing in Attur Shear Zone and its Relation with Moyar Shear Zone, South India
Gondwana Research, 2000Abstract In the eastern part of southern Peninsular India, the charnockitic hills of the Madras block are cut across by the E-W trending Attur shear zone (ASZ) which is characterised by a thick (1 to 1.5 km) phyllonite zone, showing intense mylonitisation due to ductile shearing.
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Maximum entropy and shear strain of shear zone
Mathematical Geology, 1992The principle of maximum entropy can be used to determine the shear strain in natural shear zones. When the margin of a shear zone is assumed, the principle leads to the truncated exponential distribution of the shear strain. Ifx is the distance remote from the shear zone center, which possesses the maximum shear strain, the shear strain γ (x) is given
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