Cenozoic volcanism and intraplate subduction at the northern margin of the Tibetan Plateau
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Developed in the Mt. Kunlun orogenic belt at the northern margin of the Tibetan Plateau is an active Cenozoic volcanic zone which is more than 1000km in length and some ten to hundred kilometers in width. It extends east-westwards and is roughly parallel to the strike of Mt. Kunlun. The Cenozoic volcanic rocks are divided into the northern (N-) and southern (S-) subzones. Eruptions of volcanic lavas in the S-subzone are related to an initial rift zone within the north Qiangtang terrane, but the volcanic rocks in the N-subzone are relatively close to the contact zone between the Mt. Kunlun and the Tarim terrane. The space-time distribution, petrological and geochemical features can be explained by a model of southward intraplate subduction of the Tarim terrane.
KeywordsTibetan Plateau Volcanic Rock Instrumental Neutron Activation Analysis Tarim Basin Northern Margin
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- Deng Wanming (1978) A preliminary study on the petrology and petrochemistry of the Quaternary volcanic rocks of northern Tibet.Acta Geobgica Sinica,52 (2), 148–162 (in Chinese ).Google Scholar
- Deng Wanming ( 1989 ) Cenozoic volcanic rocks in northern Tibet (Xizang ).Acta Petrologica Sinica, (3), 1–11 (in Chinese).Google Scholar
- Ewart, A. (1982) The mineralogy and petrology of Tertiary-recent orogenic volcanic rocks with special reference to the andesitic-basaltic compositional range. In: ANDESITES: orogenic andesites and related rocks. edited by R. S. Thorpe, 25–87.Google Scholar
- Hsü, K. J. (1979) Thin-skinned plate tectonics during neo-Alpine orogenesis.American Journal of Science,279, 353–366.Google Scholar
- Mattauer, M. (1986) Intracontinental subduction, crust-mantle decollement and crustal-stacking wedge in the Himalayas and other collision belt. In: Collision Tectonics.Geological Society Special Publication, (19 ), 37–50.Google Scholar
- Shu Peiyi, Liang Shanhong and Zhang Liming (1989) The deep structure of the northern part of the Karakoram and Kunlun mountains.Journal of Natural Resources,4 (3), 228–233 (in Chinese).Google Scholar