State Key Laboratory of Continental Dynamics of Ministry of Geology;
Northwest University;
Xi'an 710069;
Shaanxi;
China;
Department of Geology;
Northwest University;
Xi'an 710069;
Shaanxi;
China;
Petro China Zhejiang Oilfield Company;
Hangzhou310023;
Zhejiang;
China;
Energy and Geoscience Institute;
University of Utah;
Salt Lake City;
UT 84108;
USA;
State Key Laboratory of Sedimentary Basin and Energy Resources&Faculty of Earth Resources;
China University of Geosciences;
Wuhan 430074;
Hubei;
China;
geochemical; index; organic-matter; enrichment; paleogeography; hydrothermal; fluid; Sichuan; Basin;