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。
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.
出处
《沉积与特提斯地质》
CAS
CSCD
2000年第2期62-67,共6页
Sedimentary Geology and Tethyan Geology
关键词
层序地层
克拉通盆地
西藏东部
三叠纪
sequence stratigraphy
sequence correlation
cratonic basin
eastern Xizang
