喜马拉雅造山带东、西构造结的地质特征与对比

郑来林; 金振民; 潘桂棠; 孙志民; 耿全如

Volume 29 Issue 3

May 2004

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ZHENG Lai-lin, JIN Zhen-min, PAN Gui-tang, SUN Zhi-min, GENG Quan-ru, 2004. A Geological Comparison between the Eastern and Western Himalayan Syntaxes. Earth Science, 29(3): 269-277.

Citation:

ZHENG Lai-lin, JIN Zhen-min, PAN Gui-tang, SUN Zhi-min, GENG Quan-ru, 2004. A Geological Comparison between the Eastern and Western Himalayan Syntaxes. Earth Science, 29(3): 269-277.

ZHENG Lai-lin, JIN Zhen-min, PAN Gui-tang, SUN Zhi-min, GENG Quan-ru, 2004. A Geological Comparison between the Eastern and Western Himalayan Syntaxes. Earth Science, 29(3): 269-277.

Citation:

ZHENG Lai-lin, JIN Zhen-min, PAN Gui-tang, SUN Zhi-min, GENG Quan-ru, 2004. A Geological Comparison between the Eastern and Western Himalayan Syntaxes. Earth Science, 29(3): 269-277.

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A Geological Comparison between the Eastern and Western Himalayan Syntaxes

1.
Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, China
2.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Received Date: 2003-09-18
Publish Date: 2004-05-25

Abstract

Abstract

There are two syntaxes, where orogenic structures turn sharply. They occurred in the eastern and western ends of the Himalayan belt respectively, and are the ideal places to discuss the evolution of the belt. The comparison of geological data from the eastern and the western syntaxes shows that they have: (1) similar geography, (2) similar geological features and evolution (both lost the Himalayan sediments of Cambrian-Tertiary), (3) similar high-pressure metamorphic rocks overprinted by the re-melting of crust and migmatization younger than 10 Ma, (4) similar rapid uplifting experience since 25 Ma, especially since 10 Ma, (5) similar ages of the collision between India and Eurasia (75 Ma and 65 Ma in eastern and western syntaxes respectively) and much earlier than other places within the belt. The similarities suggest that: (1) detachment and surface processes (especially river process) would be the main reasons resulting in rapid denudation, and (2) the melts derived from the partial melting rocks in middle to low crust due to the denudation flowed and focused would play important roles on the evolutions of the syntaxes.
- geological feature,
- syntax,
- orogenic belt of Himalaya.

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References(43)

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