非海相前陆盆地含煤沉积层序地层分析——以柴达木盆地大煤沟侏罗系剖面为例

THE SEQUENCE STRATIGRAPHIC ANALYSIS OF COALBEARING STRATA IN NONMARINE FORELAND BASN ——IN CASE OF JURASSIC SECTION OF DAMEIGOU,QAIDAMBASIN

以柴达木盆地东北缘大煤沟侏罗系剖面为例，探讨了非海相前陆盆地层序地层发育的控制因素、湖平面变化、体系域划分等。将研究区下中侏罗统划分为３个构造层序和７个３级层序。指出煤层与体系域在时间序列和空间配置上存在一定联系。其研究有助于资源分布的预测。

Based on the study of the Jurassic section of Dameigou in norheastem margin of Qaidam Basin,some problems such as the controling factors of sequence fomation,the change of lake level and the division of the system tracts in nonmarine foreland basin are discussed.Three tectonosequences and seven 3thsequences are divided in the Lower and Middle Jurassic of this area.It is pointed out that a certain of relationship is existed between the coal seams and the system tracts in temporal order and spatial disposition.This study is contributed to the prediction of the resource distrbution.