Results 261 to 270 of about 123,575 (347)
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Journal of the Geological Society of India, 2019
ABSTRACT Granites are important components of the Earth's continental crust and represent the net effect of thermochemical processes that operate during partial melting, magma extraction, ascent, emplacement and crystallization. Compositional and isotopic variations in granites arise from source heterogeneities, mixing in the source, and
C. Yakymchuk
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ABSTRACT Granites are important components of the Earth's continental crust and represent the net effect of thermochemical processes that operate during partial melting, magma extraction, ascent, emplacement and crystallization. Compositional and isotopic variations in granites arise from source heterogeneities, mixing in the source, and
C. Yakymchuk
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Friction on a granite to granite interface
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1989Direct shear tests were conducted on a granite to granite interface for the purpose of tracing the evolution of frictional resistance as the initially smooth and polished surface wears during continuing shearing displacement. At the moment when sliding on the freshly manufactured interface starts (first slip), the friction angle is very low, between 15°
E. Z. Lajtai, A. M. Gadi
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A-type granites in northeastern China: age and geochemical constraints on their petrogenesis
Chemical Geology, 2002Fu-Yuan Wu, De-You Sun, Bor-Ming Jahn
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S-type granites: Their origin and distribution through time as determined from detrital zircons
, 2020A global compilation of 6911 detrital zircon U-Pb ages and trace element data from 52 major rivers shows secular variations in the relative contributions of I-type and S-type granites through time.
Ziyi Zhu +3 more
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Special Publications, 2019
The classical S–I–A-type granites from the Lachlan Orogen, SE Australia, formed as a tectonic end-member of the accretionary orogenic spectrum, the Paleozoic Tasmanides. The sequence of S- to I- to A-type granite is repeated at least three times. All the
W. Collins +3 more
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The classical S–I–A-type granites from the Lachlan Orogen, SE Australia, formed as a tectonic end-member of the accretionary orogenic spectrum, the Paleozoic Tasmanides. The sequence of S- to I- to A-type granite is repeated at least three times. All the
W. Collins +3 more
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Oxygen fugacity of Yanshanian granites in South China and implications for metallogeny
Ore Geology Reviews, 2017Xingyuan Li, Guoxiang Chi
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Journal of Asian Earth Sciences, 2019
The occurrence of A-type granites following adakitic granites can provide unique insights into the tectonic evolution of subduction zone. This paper presents a comprehensive study of zircon U-Pb-Hf isotopes and whole-rock geochemistry on the ...
Yu Zhu +6 more
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The occurrence of A-type granites following adakitic granites can provide unique insights into the tectonic evolution of subduction zone. This paper presents a comprehensive study of zircon U-Pb-Hf isotopes and whole-rock geochemistry on the ...
Yu Zhu +6 more
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The dual origin of I-type granites: the contribution from experiments
Special Publications, 2019New laboratory experiments using granulite xenoliths support a dual origin for I-type granites as primary and secondary. Primary I-type granites represent fractionated liquids from intermediate magma systems of broadly andesitic composition. Fluid-fluxed
A. Castro
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Lithos, 2018
The Shirenzhang tungsten deposit is a classic wolframite-quartz vein-type deposit located in northern Guangdong Province, eastern segment of the Nanling W-Sn polymetallic belt.
Hai Jiang +4 more
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The Shirenzhang tungsten deposit is a classic wolframite-quartz vein-type deposit located in northern Guangdong Province, eastern segment of the Nanling W-Sn polymetallic belt.
Hai Jiang +4 more
semanticscholar +1 more source