| Cenozoic Volcanism and Intraplate Subduction at the Northern Margin of the Tibetan Plateau |
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| 作者姓名： | 邓万明 |
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| 作者单位： | LaboratoryofLithosphereTectonicEvolution,InstituteofGeology,ChineseAcademyofScience |
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| 摘 要： | 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 parallet 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.
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| 关 键 词： | 新生代 火山作用 火山岩 昆仑山 青藏高原 内陆板块 |
Cenozoic volcanism and intraplate subduction at the northern margin of the Tibetan Plateau |
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| Deng Wanming.Cenozoic Volcanism and Intraplate Subduction at the Northern Margin of the Tibetan Plateau[J].Chinese Journal of Geochemistry,1991,10(2):140-152. |
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| Authors: | Deng Wanming |
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| Institution: | (1) Laboratory of Lithosphere Tectonic Evolution, Institute of Geology, Chinese Academy of Sciences, China |
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| Abstract: | 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. |
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