青藏羌塘地区隐伏裂陷槽的识别及油气远景

Recognition of Buried Aulacogen and Hydrocarbon Potential in Qiangtang Area of Qinghai-Tibet Plateau.

介绍了青藏高原羌塘盆地和措勤盆地的深部磁场特征，用隐伏裂陷槽的观点分析了这些特征。结合ＭＴ电性层深度图和中生界沉降带的厚度，将南北向正磁异常带（东经８９°－９０°）解释成晚古生代隐伏裂陷槽。该裂陷槽对北羌塘坳陷中生代的构造单元、沉积以及油气组合有很重要的控制作用。

The deep magnetic field characteristics in Qiangtang basin and Cuoqin basin of Qinghai-Ti-bet plateau is presented and analyzed by means of viewpoint of buried aulacogen. In terms of MT electrical shell depth map and Mesozoic subsiding belt thickness, the S-N normal magnetic anomaly belt(89°～90°)at east longitude) is interpreted as a buried aulacogen of lute Paleozoic which is of imPOrtant controllingeffects on the structural units, depositions and hydrocarbon occurrences of Mesozoic in northern Qiangtangdepression.