摘要
通过系统的野外剖面测量和样品采集，并运用岩石热解、有机碳测试、干酪根分析、镜质体反射率、饱和烃气相色谱、透射光照射等技术进行室内样品测试，综合评价了南祁连盆地三叠系碳酸盐岩和泥岩露头样品的有机质丰度、类型和成熟度，探讨了有机质的原始沉积环境和生源特征。结果表明：尕勒得寺组（T3g）属于好烃源岩，有机质类型为Ⅰ～Ⅱ型，大加连组（T_2d）为Ⅱ～Ⅲ型；有机质演化程度高，处于高一过成熟阶段；碳酸盐岩和泥质岩沉积环境分别为海陆过渡相和陆源为主；碳酸盐岩与泥岩有机质生源分别为生物降解的水毕毕物和陆堆毕物．
According to the outdoor profile survey, collection of samples in systematic and the organic geochemical analysis technique including rock pyrolysis, residual organic carbon content, kerogen analysis, organic maceral, vitrinite reflectance, gas chromatography of saturated hydrocarbon and transmitted light microscopy, the authors discussed organic matter abundance, type and maturity of Tag carbonate and TEd mudstone outcrop samples in the Southern Qilian Basin, the original sedimentary environment and bio-inputs of organic matter. The results show that Tag carbonate belong to good source rocks, the organic matter is type ~ -II and TEd mudstone is type II -III. The organic matter has a high degree of thermal evolution and is at the high and over mature stage. They are deposited in transitional and mainly terrestrial facies. Organic matters are mainly derived from aquatic plant and errestrial life biodegradation.
出处
《北京大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第6期1034-1040,共7页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家重点基础研究发展计划(2003CB214601,2002CCC01400)资助
关键词
有机地球化学
烃源岩
南祁连盆地
三叠系
organic geochemistry
source rock
the Southern Qilian Basin
Triassic
