Early-Middle Permian Basin-mountain Coupling Features Between Northwestern Margin of the Tarim Basin and the South Tianshan Orogen
详细信息
- 责任者：Luo JinHai(State Key Laboratory of Continental Dynamics ; Department of Geology ; Northwest University ; Xi’ an 710069 ; China) ; Che ZiCheng
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(8)
- 关键词：盆山耦合 ; basin range coupling ; 天山 ; Tianshan Mountains ; 塔里木盆地 ; Tarim Basin
- 页码：p.2506-2514
- 图表：illus.,2 tables,34 refs.
- 分类号：0300
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Analysis of Early-Middle Permian lithofacies-paleogeography, structure and magmatism in the northwestern margin of the Tarim basin and adjacent South Tianshan orogen shows that basaltic magmatisms in the northwestern margin of the Tarim result from the mantle plumes, while the contemporaneous post-collisional granites develop within the South Tianshan orogen. The Early-Middle Permian depocenters in the intermediate zone between Tarim and the South Tianshan orogen are characterized by stable depression, and the depocenters migrates gradually toward the Tarim block. Early-Middle Permian uplifting of the South Tianshan orogen because of the post-collisional extension results in intracontinental subduction of the Tarim lithosphere under the South Tianshan lithosphere, and structural surroundings which is similar to the peripheral foreland basin arises in the intermediate zone. The depocenters correspond to the foredeep of the peripheral foreland basin system. There is no clear interrelation between the Early-Middle Permian mantle plumes within the Tarim and the post-collisional extension, but the post-collisional extension of the South Tianshan orogen of Early-Middle Permian shows good coupling features with sedimentation-structure in the northwestern margin of the basin Tarim.
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