摘要
在对北羌塘拗陷侏罗系地层发育特征分析基础上,通过典型剖面沉积相、层序界面特征、准层序叠置序列、体系域构成等研究,将侏罗系地层划分为5个三级层序。其中第1层序(SQ1)对应于雀莫错组地层,第2层序(SQ2)对应于布曲组中下部地层,第3层序(SQ3)对应于布曲组上部和夏里组下部地层,第4层序(SQ4)对应于夏里组中上部和索瓦组下部地层,第5层序(SQ5)对应于索瓦组上部和雪山组地层。在此基础上,开展了北羌塘拗陷内侏罗系层序地层对比。研究区层序地层的划分与对比研究,对羌塘盆地地层划分与对比、分析盆地古地理微地貌、预测盆地埋藏区生储盖发育特征等都具有重要意义。
New research, based on sedimentary facies, sequence boundary, stacking patterns and systems tracts, has led to a division of the Jurassic strata into five third-order sequences for the representative measured sections in the northern Qiangtang depression, northern Xizang. These third-order sequences are involved in SQ1 corresponding to the Middle to Lower Jurassic Qoimaco Formation, SQ2 corresponding to the middle to lower parts of the Buqu Formation, SQ3 corresponding to the upper part of the Buqu Formation and lower part of the Xiali Formation, SQ4 corresponding to the middle and upper parts of the Xiali Formation and lower part of the Suowa Formation, and SQ5 corresponding to the upper part of the Suowa Formation and Xueshan Formation. Sequence stratigraphic division and correlation of the Jurassic strata in the northern Qiangtang depression are significant to the refinement of the Jurassic strata, examination of palaeogeographic framework, prediction of the source-reservoir-seal association development in the Jurassic strata from the northern Qiangtang depression, and geophysical interpretation and basin modeling for the Qiangtang Basin.
出处
《沉积与特提斯地质》
CAS
CSCD
2015年第2期1-7,共7页
Sedimentary Geology and Tethyan Geology
关键词
典型剖面
层序划分
北羌塘拗陷
三级层序
representative section
sequence division
northern Qiangtang depression
third-order sequence
