关键词: 沙尔布拉克地区, 南明水组, 烃源岩, 有机地球化学

Abstract: According to the organic geochemical analysis including rock pyrolysis, residual organic carbon content, kerogen carbon isotope, organic maceral, vitrinite reflectance, gas chromatography of saturated hydrocarbon, etc. , a comprehensive study on organic matter abundance, type and maturity of Lower Carboniferious Nanmingshui Formation mudstone and shale outcrop samples in Shaerbulake region of Fuyun County was made, and the original sedimentary environment and bio-inputs of organic matter were discussed. The results show that the second and third member of Nanmingshui Formation with organic carbon in relatively high content belong to good source rocks. The organic matter in the second member is type Ⅱ₂and type Ⅲ, and that in the third member is type Ⅲ. The organic matter has a high degree of thermal evolution and is at the high-mature and over-mature stage. The source rocks are deposited in an open water of strong reduction and high salty. The organic matters are mainly derived from terrestrial higher plant, and mixed with few input of aquatic low organisms.

Key words: Shaerbulake region, Nanmingshui Formation, source rock, organic geochemistry