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标识符[URL]: http://www.sciencemag.org/cgi/content/abstract/294/5547/1671
资源名[中]: 青藏高原逐步地隆起和发育
资源名[英]: Oblique stepwise rise and growth of the Tibet plateau.
创建者: Tapponnier P, Zhiqin X, Roger F, Meyer B, Arnaud N, Wittlinger G, Jingsui Y.
关键词[中]: 隆起 板块构造 构造地质
关键词[英]: Rise;Blocks;Seismic
空间范围: Tibet Plateau
联系.EMail : tappon@ipgp.jussieu.fr
联系.机构 : Institut de Physique du Globe,France
联系.地址 :

Institut de Physique du Globe, 4 Place Jussieu, 75252 Paris, France. tappon@ipgp.jussieu.fr

资源描述:

该文章主要对青藏高原逐步地隆起和发育,以及板快碰撞,挤压等做了研究性的阐述。

描述[英]:

Two end member models of how the high elevations in Tibet formed are (i) continuous thickening and widespread viscous flow of the crust and mantle of the entire plateau and (ii) time-dependent, localized shear between coherent lithospheric blocks. Recent studies of Cenozoic deformation, magmatism, and seismic structure lend support to the latter. Since India collided with Asia approximately 55 million years ago, the rise of the high Tibetan plateau likely occurred in three main steps, by successive growth and uplift of 300- to 500-kilometer-wide crustal thrust-wedges. The crust thickened, while the mantle, decoupled beneath gently dipping shear zones, did not. Sediment infilling, bathtub-like, of dammed intermontane basins formed flat high plains at each step. The existence of magmatic belts younging northward implies that slabs of Asian mantle subducted one after another under ranges north of the Himalayas. Subduction was oblique and accompanied by extrusion along the left lateral strike-slip faults that slice Tibet's east side. These mechanisms, akin to plate tectonics hidden by thickening crust, with slip-partitioning, account for the dominant growth of the Tibet Plateau toward the east and northeast.

资源类型: 论文
资源语种: 英语
资源格式: text/html
研究领域与方向: 形成、演化及环境响应
累计评价: 目前没有对此资源的评价
资源创建日期:
发布日期:
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时间范围 :
记录创建日期: 2005-08-17 14:39:29
记录更新日期: 2007-11-30 14:39:32
资源加工者:
最后修改者: wuxinnian
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