CAJ | 학술논문

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Ⅰ2型为主，具备良好的生烃潜力。
만주라세색와조침적시기강당분지위일투해상침적，주요발육유삼각주、탄산염태지、심수침적등침적체계。분지유북향남수체축점가심，의차출현해륙과도삼각주상、국한태지상、개활태지상、태연탄(초)상화분지상침적。주요물원래자분지북부륭기구，분지중앙륭기구위차요물원구。유궤지구화학분석표명，해구분지상、국한태지상화개활태지상대중경원암유궤질봉도교고，모질류형이Ⅰ2형위주，구비량호적생경잠력。
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 I2 and the basin has good potential of hydrocarbon generation.