摘要
晚侏罗世索瓦组沉积时期羌塘盆地为一套海相沉积 ,主要发育有三角洲、碳酸盐台地、深水沉积等沉积体系。盆地由北向南水体逐渐加深 ,依次出现海陆过渡三角洲相、局限台地相、开阔台地相、台缘滩(礁 )相和盆地相沉积。主要物源来自盆地北部隆起区 ,盆地中央隆起区为次要物源区。有机地球化学分析表明 ,该区盆地相、局限台地相和开阔台地相带中烃源岩有机质丰度较高 ,母质类型以 2 型为主 。
Upper Jurassic Suowa formation in Qiangtang basin is composed of delta,carbonate platform and deep water depositional systems Water becomes more and more deeper from the north of Qiangtang basin to the south margin,and the sedimentary facies vary from delta facies to restricted platform facies,open platform facies,shoal(reef) facies on the edge of platform and basin facies The primary provenance comes from the north uplift of Qiangtang basin,and the secondary provenance is the central uplift Organic geochemical analysis shows that source rocks from the basin facies,restricted platform facies and open platform facies have high organic matter abundance,the type of major parent material is mainly I 2 and the basin has good potential of hydrocarbon generation
出处
《江汉石油学院学报》
EI
CSCD
北大核心
2001年第1期5-8,共4页
Journal of Jianghan Petroleum Institute
关键词
海相沉积
沉积相
岩相古地理
生物岩
生烃潜力
羌塘盆地
晚侏罗世
油气地质
marine deposit
sedimentary facies
lithofacies and paleogeography
source rock
genetic potential
Qiangtang basin
Late Jurassic
