State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development;
Beijing 100083;
China;
College of Energy;
Chengdu University of Technology;
Chengdu 610059;
China;
College of Environment and Civil Engineering;
Chengdu University of Technology;
Chengdu 610059;
China;
Cyclostratigraphy; Floating astronomical time scale; Early Silurian; Organic matter accumulation;