西伊犁盆地石炭—二叠系发育特征及其古地理意义

The Stratigraphic Characteristics and Their Palaeogeographic Significance of Carboniferous and Permian Systems in West Yili Basin

伊犁盆地可划分为东、西盆地,两者具有成因联系,目前对西盆地沉积特征研究很少,这不利于整个伊犁地区古地理的恢复,制约了伊犁盆地油气勘探及中国与哈萨克斯坦的油气合作。以野外地质调查资料为基础,结合盆地内地球物理资料与研究成果,通过研究西伊犁盆地石炭系、二叠系的平面发育特征与垂向发育特征,恢复西伊犁盆地石炭—二叠系的古地理环境,为今后该地区开展油气勘探提供依据。

Yili Basin can be divided into West Yili Basin and East Yili Basin,and there are close genetic relationships between these two parts. However,the study on the sedimentary environment in West Yili Basin is rare so far,which is not favorable for the paleogeographic reconstruction of Yili Basin. And it is restricting the oil- gas exploration in this territory and the China- Kazakhstan cooperation on energy. Based on the field geological survey,the geophysical data and previous works of others,the plane distribution features and the vertical superimposition features of Carboniferous and Permian Systems were studied. The paleogeographic environment in Carboniferous and Permian was reconstructed. The results could provide basis for future oil- gas exploration.