中文摘要：

北羌塘盆地长蛇山油页岩位于目前中国最大规模的胜利河一长蛇山海相油页岩带北东，长蛇山南麓，其剖面主要岩性为油页岩、泥晶灰岩、黑色页岩和泥灰岩。本文通过对20件样品进行多项地球化学指标测试，详细评价了长蛇山油页岩剖面烃源岩的有机质丰度、类型及成熟度等指标，并分析了其沉积环境。结果表明：长蛇山油页岩的生烃潜力最好．其次为黑色页岩和泥晶灰岩。总有机碳含量在烃源岩中为0．41％～9．49％，平均为4．02％，在油页岩内含量最高．达到4．53％～9．49％．平均为7．74％；氯仿沥青“4”含量为O．0252％～0．3403％，在油页岩内平均为0．27％，总体为中等-较好烃源岩：有机元素和有机显微组分分析显示干酪根类型以Ⅱ，型为主，少数为Ⅱ：和Ⅲ型；Ro的分布范围为1．08％～1．43％．平均值为1．27％。有机质热演化程度为成熟-过成熟，且在垂向上有机质演化程度逐渐变高。该剖面的烃源岩沉积于盐度较高的还原环境．有机质母质主要以低等水生生物为主。

英文摘要：

Located in North Qiangtang Basin in the northern part of the Shengli River-Chang＇she Mountain oil shale belt （currently the largest marine oil shale belt in China）, the Chang＇she Mountain oil shale section mainly consists of oil shale, micrite limestone, black shale and marl. In order to determine the content of total organic matter, organic matter type, thermal maturity and sedimentary environment of the source rocks along the Changshe Mountain oil shale section, the authors collected twenty samples for multiple organic geochemistry tests. The results show that the oil shale has the best hydrocarbon generation potential, followed by the black shale and micrite limestone. The total organic carbon （TOC） content varies from 0.41% to 9.49%, with an average of 4.02%, and the oil shale samples have the highest values （ranging from 4.53% to 9.49%）, with an average of 7.74%. Chloroform bitumen ＂A＂ varies from 0.0252% to 0.3403%, and the average value of the oil shale sample is 0.27%, indicating moderate to good source rocks. The kerogen types assessed from organic element composition and organic petrography data show that there is mainly type II1 kerogen, with small amounts of type II 2 and III kerogen. The distribution of Ro ranges from 1.08% to 1.43%, with an average of 1.27%, demonstrating a mature to overmature stage of the organic matter, with the Ro gradually becoming higher along the oil shale section. The source rocks along the Changshe Mountain oil shale section were deposited in a reductive and high-saline water environment, and the organic source material was mainly low-grade hydrobios.