中文摘要：

总有机碳含量（TOC）、有机质碳稳定同位素（δ^13C）、氢指数（HI）和有机质类型是进行古湖泊学研究的良好替代性指标,本研究以岩石热解分析数据和总有机碳测试数据为替代指标来综合反映松辽盆地青山口组二—三段晚期集水盆地的气候、湖泊生产力和湖泊底部水体环境等古湖泊学特征。指标显示：青山口组二—三段晚期集水盆地的古气候经历了温暖-冷-暖湿-温暖而干燥-干冷的演化过程;1933～1932m沉积时期,有机质以湖相为主,湖底为弱氧化环境,古湖泊初始生产力最高,其它阶段,有机质以陆源为主,虽然TOC含量高,但古湖泊初始生产力并不高;TOC值随深度减小而降低,δ^13C值随深度变浅而偏正,而且δ^13C值正向偏移量最大的时期晚于TOC值最高的时期;暖期时,TOC值较高,HI值较高,δ^13C值偏负;冷期时,TOC值较低,HI值较低,δ^13C值偏正。

英文摘要：

Total organic carbon （TOC）, organic carbon stable isotope （δ^13C）, hydrogen index （HI） and organic matter types are the effective proxies for the study of paleolimnology. This work discusses paleolacustrine characteristics （climeate, paleoproductivity and the lacustrine bottom water environments） of the upper 2nd and 3rd members of Qingshankou Formation in Songliao Basin by analyzing rock pyrolysis parameters and the data of total organic carbon. The proxies indicated that the climate changed from warm, colder, wet warm, warm but dry to dry cold periods. Sedimentary period of 1933 to 1932 m is characterized by organic lastrine facies and a high initial productivity of the lake, with a weak oxidation environment at the bottom of the lake. During other stages, the periods were dominated by organic matter with terrestrial origin; despite high content of TOC, the initial productivity of the lake is not high. TOC decreased with decreasing depth while δ^13C showed a positive shift. The period of δ^3C value reaching to its highest value is later than that in which TOC reached to the biggest value. During the warm stage, both TOC and HI value were higher, but δ^13C value tended to be negative excursion; during the cold period, both HI and TOC value became lower, but δ^3C values were positive. Therefore, these proxies can be employed to speculate paleolimnological condition and sedimentary environment.