| 西藏札达盆地形成演化与喜马拉雅山隆升 |
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| 引用本文：朱大岗,孟宪刚,邵兆刚,杨朝斌,韩建恩,余佳,孟庆伟,吕荣平.2006.西藏札达盆地形成演化与喜马拉雅山隆升[J].地球学报,27(3):193-200. |
| DOI：10.3975/cagsb.2006.03.01 |
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| 基金项目:国家自然科学基金项目(编号:40572134)，中国地质调查局项目“青藏高原第三纪重点古湖泊环境演变序列”(任务书编号:科[2005]005-02，工作项目编码:1212010511902) |
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| 中文摘要:通过野外地质调查、实测地层剖面和室内综合研究,笔者将札达盆地上新世—早更新世形成演化划分为6个阶段①盆地初始断陷阶段;②盆地加速断陷阶段;③盆地强烈断陷阶段;④盆地断陷止息阶段;⑤盆地二次初始断陷阶段;⑥盆地二次加速断陷阶段。并以札达盆地形成演化为基础将喜马拉雅山此阶段的隆升划分为5个阶段①慢速隆升阶段(5.4~4.4Ma);②中速隆升阶段(4.4~3.5Ma);③快速隆升阶段(3.5~3.2Ma);④停止隆升阶段(3.2~2.7Ma);⑤快速隆升阶段(2.7Ma)。研究表明,喜马拉雅山的隆升是一个多阶段、不等速和非均变的复杂过程。 |
| 中文关键词:西藏札达 上新世—早更新世 盆地演化 山脉隆升 喜马拉雅山 |
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| The Formation and Evolution of Zhada Basin in Tibet and the Uplift of the Himalayas |
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| Abstract:According to field geological investigation, stratigraphic section survey and indoor integrated studies, the authors have divided the evolution of Zhada basin during Pliocene_Early Pleistocene into six stages, namely, ① the initial fault depression, ② the accelerated fault depression, ③ the intense fault depression, ④ the stop of fault depression, ⑤ the second initial fault depression and ⑥ the second accelerated fault depression. On the basis of the shaping and evolution of Zhada basin, the uplift of the Himalayas has been divided into five stages, i.e., ① the slow uplift stage (5.4～4.4 Ma), ② the intermediate_speed uplift stage (4.4～3.5 Ma), ③ the high_speed uplift stage (3.5～3.2 Ma), ④ the stop of the uplift (3.2～2.7 Ma) and ⑤ the fast uplift stage (2.7 Ma). It is obviously shown that the uplift of the Himalayas is a complex process characterized by poly_stages, nonuniform velocity and nonuniformity. |
| keywords:Zhada in Tibet Pliocene—Early Pleistocene basin evolution mountain uplift the Himalayas |
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