Sequence stratigraphic division, correlation and geological significance of the Jurassic strata in the northern Qiangtang depression, northern Xizang

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.