准噶尔南缘地区深层侏罗纪地层具有巨大的油气勘探潜力,然而该地区侏罗系的研究还处于探索阶段,沉积物源方向以及储层发育的主控因素都还不清楚.本文通过对该区侏罗系齐古组重矿物组合特征的分析结果结合稀土元素的分配特征,认为本区不同构造单元内存在着不同方向的物源,同一地区地层发育的早期与晚期,其物源的主控方向也在发生着变化.研究表明齐古组南缘西段四棵树凹陷北部地区存在东北部和西北部两支物源；四棵树凹陷南部地区物源为南部方向.而南缘中段地区表现为早期受南部和东部物源共同影响,晚期则主要受东北部物源影响.南缘东段离物源较近,物源区母岩类型以变质岩为主.物源特征在一定程度上决定了本区储层的发育,表现为岩石成分明显地受物源区母岩类型的影响,从而影响了储层后期的改造.%There exists great potential of oil and gas resources in deep Jurassic strata of southern Junggar basin；nevertheless,the research on Jurassic formation remains in the stage of exploration,and the provenance and main controlling factors of the reservoir development are not yet clear.Based on the study of heavy mineral combination in combination with rare earth element distribution characteristics,the authors infer that there are different provenances in different tectonic units.,and at the early and late development stage of the strata in the same area,the main direction of provenance was also varying.It is concluded that there are two provenances in northern Sikeshu depression,i.e.,the Chepaizi provenance in the northeast and the provenance in the northwest.In southern Sikeshu area,the provenance is the southern part.The provenance of Qigu Formation varied in the period of sedimentation,the southern and eastern provenances were dominant at the early stage,whereas the northern provenance gradually became dominant at the late stage.The eastern area was close to the provenance,and the parent rock was primarily metamorphic rocks.Studies show that rock debris was under the influence of parent rock types,and this further affected the development characteristics of the reservoir.
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