论文部分内容阅读
盆地的成生和发展塔里木曾经历三个明显的发展阶段,即前震旦纪地槽、古生代地台和中新生代盆地。它具有统一的前震旦系结晶基底,广泛的古生界基础和巨厚的中新生界盖层。基底:由太古界、元古界(不包括震旦系,下同)的中深变质岩组成。据航磁资料,可分三个区,即北部平缓负异常区(柯坪—阿瓦提—库车一带)、南部北东向宽缓正负相间异常区(北纬39°以南)、中部东西向正异常区(北纬39°—40°)。其基底埋藏深度详见表1。
The birth and development of the basin Tarim has experienced three distinct stages of development, the Pre-Sinian terrane, the Paleozoic platform and the Meso-Cenozoic basin. It has a uniform crystalline basement of the former Sinian, a wide range of Paleozoic basal and thick Mesozoic caprock. Basement: By the Archean, Proterozoic (not including the Sinian, the same below) in the deep metamorphic rocks. According to the aeromagnetic data, it can be divided into three areas, ie, the northern flat anomalous zone (Keping-Awati-Kuqa area), the south-easterly anomalous zone (39 ° south latitude) East-west positive anomaly (latitude 39 ° -40 °). The buried depth of the substrate is shown in Table 1.