Geochemical Characteristics of Carboniferous Source Rocks and Distribution in the Eastern Part of Junggar Basin

The organic matter types for Carboniferous source rocks in Junggar basin are humic and mixing of humic and sapropelic.The Carboniferous source rocks in this area have the large thickness and high TOC,and are fallen within the high thermal maturity.Thus,the source rocks are prone to be moderate-good scope in the source rock classification.The sedimentary environment and tectonic movements greatly constrained the abundance of organic matter and thermal evolution and caused the difference of the quality of Carboniferous source rocks in the vertical and horizontal directions.For example,the Batamayi Formation has the high quality of source rock in vertical direction,in contrast that the Wucaiwan and Beisantai Formations have the high quality of source rock in horizontal areas.