藏南白垩纪—古近纪岩石地层厘定与构造地层划分

发布时间：2018-06-11 18:43

本文选题：西藏南部 + 喜马拉雅　；参考：《地学前缘》2017年01期

【摘要】：岩石地层的厘定是一件基础而重要的工作,集中体现了一个阶段对地层的综合认识水平;对一个地区而言,建立行之有效的岩石地层划分方案具有重要的意义。文中详细介绍和评述了藏南白垩纪—古近纪(含中新世)33个岩石地层单元,其中特提斯喜马拉雅南带13个、特提斯喜马拉雅北带9个、日喀则弧前盆地带9个、雅鲁藏布缝合带2个。特提斯喜马拉雅南带白垩系包括古错村组、东山组、察且拉组、冷青热组、波林夏拉组、岗巴村口组、旧堡组、遮普惹山坡组、宗山组;古近系包括基堵拉组、宗浦组、恩巴组、扎果组;特提斯喜马拉雅北带白垩系包括维美组、日朗组、甲不拉组、床得组;古近系包括宗卓组、甲查拉组、蹬岗组、桑单林组、者雅组;日喀则弧前盆地带白垩系包括桑祖岗组、昂仁组、帕达那组、曲贝亚组,古近系包括曲下组、加拉孜组、达金组;中新统包括秋乌组、大竹卡组;雅鲁藏布缝合带包括白垩系冲堆组、渐新统—中新统柳区群。文中在结合物源分析、盆地演化等研究资料基础上,划分了7个构造地层单元:其中印度-亚洲大陆碰撞后的新生代2个(TS1、TS2)、碰撞前白垩纪印度北缘3个(TSI3、TSI4、TSI5)、亚洲南缘2个(TSL3、TSL4)。
[Abstract]:The determination of lithostratigraphy is a basic and important work, which embodies the level of comprehensive understanding of strata in one stage, and it is of great significance to establish an effective lithostratigraphic division scheme for a region. In this paper, 33 lithostratigraphic units from Cretaceous to Paleogene (including Miocene) in southern Tibet are introduced and reviewed in detail, including 13 southern Tethys Himalayan belt, 9 northern Tethys Himalayan belt and 9 Xigaze forearc basin belt. Yalu Zangbu suture belt 2. The Cretaceous system of the Tethys Himalayan South Belt consists of the Gucaocun formation, the Dongshan formation, the Chayera formation, the Lengqingre formation, the Bolinshala formation, the Gambarunkou formation, the Jiubao formation, the Zongshan formation and the Zongshan formation, and the Paleogene consists of the Jixuala formation, the Zongpu formation, the Paleogene group, and the Zongpu formation. The Cretaceous system of the northern belt of Tethys Himalayas includes the Vimei formation, the Rilang formation, the Jiabula formation, the bed group, the Paleogene group including the Zongzhuo group, the Jiachara group, the pedal group, the Sangdanlin formation, the Shouya group, and the Paleogene group. The Cretaceous system of Xigaze forearc basin includes Sangzugang formation, Anren formation, Padana formation, Qubeya formation, Paleogene including Quxia formation, Kalazi formation, Dagin formation, Miocene including Qiwu formation and Dazhuka formation; The Yalu Zangbu suture zone includes the Cretaceous Chongdui formation and the Oligocene-Miocene Liu area. Based on the data of source analysis and basin evolution, seven tectonic stratigraphic units have been divided into 7 tectonic stratigraphic units: 2 Cenozoic TS1 TS-2s after the Indo-Asian continental collision, 3 TSI3 TSI4TSI4TSI5T in the northern Cretaceous of the Cretaceous before the collision, and 2 TSL3TSL4TSL4 in the southern margin of Asia.
【作者单位】：南京大学地球科学与工程学院;广西大学海洋学院;合肥工业大学资源与环境工程学院;中国科学院地质与地球物理研究所;
【基金】：国家重点基础研究发展计划“973”项目(2012CB822001) 国家杰出青年科学基金项目(41525007)
【分类号】：P535

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