延吉盆地构造地质特征及其含油性  

CHARACTERISTICS OF STRUCTURAL GEOLOGY AND ITS OIL POTENTIAL IN YANJI BASIN

作　　者：张之一[1] 高品文 

机构地区：[1]西安地质学院 [2]中国地质大学

出　　处：《石油与天然气地质》1989年第4期398-405,共8页Oil & Gas Geology

摘　　要：这个中、新生代沉积盆地面积约1000km^2,基底最大埋深3400m。盆内主要沉积为白垩系,其有机质丰度高,且已成熟,具有一定生油潜力。盆内可分为三个一级构造单元,其中部坳陷带内的中央凸起带,是最有利的油气聚集带。Yanji Basin,located in the east part of Jilin Province with an area of1000km^2,is a Meso-Cenozoic basin formed on Hercynian granite and metamorphic rocks during late Indosinian movement.The greatest burieddepth of the basement is 3400m.The basin in geotectonic position belongs to Yongji-Aohan fault-foldedbelt of Tianshan-Xinganling fault-folded System.X-shaped and H-shaped faultsystems controlled the formation and development of the basin.Three first-order structural units can be divided within the basin.Besides,a secondarystructural belt—central uplift belt has been discovered by interpretation oflandsat photographs and aeromagnetie data.Through the analysis of paleotectonic stress field,the basin is determinedto be stretch origin;the activities of Hegang-Qingjin fault belt have playeda leading role in its formation.The basin contains mainly Cretaceous sediments,then Tertiary depositsand great deal Jurassic volcanic rocks,in which asphalt sandstone,asphalticvein and geochemical exploration abnormality have been found.According to the analysis of the source rock,the authors considered thatsandy shale member of the Lower Cretaceous Dalazi Formation that containsabundant organic matter and is matured has oil forming potential to someextent.So it is inferred that the most favourable place for oil enrichment isthe central uplift belt.

关 键 词：盆地 构造 地质特征 含油性 

分 类 号：P618.130.2[天文地球—矿床学]