西藏东部昌都—类乌齐三叠纪克拉通盆地层序地层及其对比

详细信息

The Qamdo-Riwoqe Triassic cratonic basin in eastern Xizang: sequence stratigraphy and correlation

1. Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China;
2. China University of Mining Technology and Science, Xuzhou 221008, Jiangsu, China

摘要: 昌都-类乌齐地区的三叠系发育较好,尤其是上三叠统建组剖面多。以露头剖面为基础,在晚三叠世地层中可识别出4个三级层序界面,其中1个Ⅰ类界面与3个Ⅱ类界面;划分出4个三级层序,分别为1个Ⅰ类层序和3个Ⅱ类层序。笔者研究认为,该区克拉通盆地三级层序的类型、结构与数量等方面具有可对比性。
- 层序地层 /
- 层序对比 /
- 克拉通盆地 /
- 西藏东部
Abstract: The Triassic strata are widespread in the Qamdo-Riwoqe region,eastern Xizang.In the light of the outcrop sections in this region,four third-order sequence boundaries have been distinguished for the Late Triassic strata. One is assigned to the type 1 sequence boundary and the other three belong to the type 2 sequence boundary. Correspondingly,four third-order sequences are recognized:one type 1 sequence and three type 2 sequences.These third-order sequences may be correlated,and owe their origin to the interaction of inactive tectonics,increasing sediment supply and global sea-level changes.
- sequence stratig raphy /
- sequence co rrelation /
- cratonic basin /
- eastern Xizang