与近海型盆地相比，伸展构造背景下的陆相煤系沉积过程中，气候变化不仅通过流域内降雨量控制着绝对湖平面变化，还通过控制物源区植被发育影响沉积物供给速率，并使煤系表现为沼泽和陆源碎屑两种矛盾沉积体系的交替更迭。为了揭示陆相煤系沼泽、陆源碎屑体系交替沉积特征与古气候变化间的作用关系，以柴达木盆地北缘大煤沟剖面早、中侏罗世煤系为主要研究对象，应用碎屑岩石英/长石比，泥质岩和煤层孢粉、有机质惰质组分碳同位素等作为煤系沉积期高分辨率构造活动、古植物、古气候（湿度、温度）和沉积环境演化的指示参数。通过层序格架内构造活动，古植物、古气候和沉积环境间综合对比分析，围绕聚煤作用（全球碳存储）发生、终止原因和陆源碎屑体系废弃、复活机制两个科学问题，提出陆相煤系层序格架内沼泽、陆源碎屑体系交替演化与古气候变化关系模式。

Compared with offshore basin，during the sedimentary history of stretching Terrestrial basin paleoclimate changes not only controls the absolute changes of lake level by rainfall in the basin, but also affects the rate of sediments supply through controlling of the development of plants, which have make the two kinds of contradiction sedimentary systems, namely swamp and terrigenous clastic system deposited alternately. To reveal the relationship between the alternating evolution of swamp and terrigenous system and paleoclimate changes, a early to middle Jurassic coal measure from Dameigou area in Qaidam basin will be studied. Some genetic geological parameters, such as ratio of rock /feldspar of clastic rock, sporopollen of argillaceous rock and coal seam, carbon isotope of inertinite in organic matter, et al. will be employed as the indication index for tectonic activities, paleoplants, paleoclimate(humidity and temperature). The relationship among tectonic activities, paleoplants, paleoclimate and sedimentary evolution will be analyzed based on two scientific issues, namely occurrence and termination cause of coal accumulation and abandon and resurrection mechanism of terrigenous clastic system, to find the relationship model between the alternating evolution of swamp and terrigenous system and paleoclimate changes in Terrestrial coal measures.