Evolution of the Qinling orogenic belt
Article Abstract:
Geological, geophysical, and geochemical analysis of the Qinling orogenic belt identifies it as a tectonic wedge composed of six thrust sheets. Its initial development stage involved the North and South China block collision resulting in the Qinling trough closure and an asymmetric fanlike structure across the belt. Large-scale contraction indicated by southward thrust sheet displacement occured in the second stage, which involved several sequences of collapse and thrusting. Granitization and metamorphism bear out basement rifting and partial melting.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1992
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Granulites in the Tongbai area, Qinling belt, China: geochemistry, petrology, single zircon geochronology, and implications for the tectonic evolution of eastern Asia
Article Abstract:
The Qinling granulites are categorized between 470 and 435 Ma, and they represent a high-grade metamorphic event during which these rocks are transferred to the lower continental crust. Moreover, these rocks are characterized as two-pyroxene granulites and garnet granulites which formed at temperatures of 757 to 840 degrees Celsius, and are now found as xenoliths in granodioritic gneisses. Lastly, the granulites represent an unknown phase of early Silurian crustal thickening.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1993
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Late orogenic carboniferous extensions in the Variscan French Massif Central
Article Abstract:
Studies validate the presence of a late Carboniferous-Early Permian extensional stress field in the Variscan French Massif Central. Stretching in the NE-SW direction is attributed as a major factor in, among other things, forming pull-apart troughs along the tear faults and for brittle faulting rampant in the upper plate metamorphic rocks.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1995
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