塔西南山前晚新生代构造生长地层与变形时代  

Growth strata and the deformation time of the late Cenozoic along front belts of Pamir-western Kunlun-southwest Tianshan in China

作　　者：刘胜[1] 汪新[2] 伍秀芳[2] 邱斌[1] 

机构地区：[1]石油大学,北京102249 [2]浙江大学地球科学系,浙江杭州310027

出　　处：《石油学报》2004年第5期24-28,共5页Acta Petrolei Sinica

基　　金：中国石油天然气集团公司"十五"重点科技攻关项目(99 1 1 1 0 3 0 1 )

摘　　要：通过野外观测和二维地震测线研究发现 ,帕米尔 西昆仑山 西南天山山前发育生长地层和生长不整合。通过确定生长地层和生长不整合的层位 ,结合磁性地层年代学资料 ,初步判定西南天山山前阿图什背斜、喀什背斜开始变形的时间在距今 1 0 7Ma以内 ,帕米尔北麓乌泊尔断层变形时代为晚更新世 ,西昆仑山北麓苏盖特背斜形成于上新世 (距今 4 0Ma) ,英吉莎背斜形成于晚更新世 (距今在 1 0Ma以内 ) ,阿克陶背斜形成于更新世末期 ,柯克亚背斜、固满背斜形成于晚上新世—早更新世 (距今 2 14～ 1 8Ma)。由此推断 ,帕米尔 西昆仑 西南天山山前变形发生在上新世—第四纪。The detailed research of outcrops and 2D seismic profiles of the western Tarim Basin indicate that there are growth strata and growth unconformity along the northern front belt of Pamir-western Kunlun and the southern front belt of southwest Tianshan.By identifying the exact layer of growth strata and growth unconformity and applying the magnetostratigraphic data,it is found that the time of main tectonic deformation was within 1 07 million years before present at Atushi anticline and Kashi anticline on the southern front belt of southwest Tianshan,and it was the late Pleistocene at Wupoer Fault on the north flank of Pamir.On the north flank of western Kunlun,the deformation of Sugaite anticline started in Pliocene (about 4 0 million years before present).Yingjisha anticline started in the late Pleistocene.Aketao anticline started in the end of the late Pleistocene,and Kekeya anticline and Guman anticline started in the late Pliocene-early Pleistocene (from 2 14 to 1 8 million years before present).Hence,it is deduced that the tectonic deformation mainly took place from the Pliocene to the Quaternarg along the front belts of Pamir-western Kunlun-southwest Tianshan in China.

关 键 词：塔西南山前 生长地层 变形时代 磁性地层 晚新生代 

分 类 号：TE111.2[石油与天然气工程—油气勘探]