塔里木盆地西缘航磁区域场特征与构造单元划分

Regional magnetic field characteristics and geotectonic units division of western margin of Tarim basin

文章以新疆塔里木盆地西缘高精度航磁测量的成果资料作为基础数据,对塔里木盆地西缘区域磁场特征与大地构造单元的关系进行了研究。依据航磁资料,划出3条深断裂(即磁场区分界线),分析了深断裂在航磁、地质资料上反映的特征,其中F1断裂和F2断裂与地质上划定的断裂基本吻合,F3断裂部分吻合,对其空间位置提出了新的认识。将研究区划分为4个特征各异的磁场区,并进一步划分了二级磁场区,从磁场特征、地层分布、大地构造位置、基底性质、区域场成因等方面进行了阐述。

Based on high-precision aeromagnetic data in the western margin of Tarim Basin,this paper studies the intrinsic relationship between the characteristics of regional magnetic field and the division of geotectonic units.According to aeromagnetic data,three deep faults(demarcation lines of regional magnetic fields)are delineated.The characteristics of the faults reflected in aeromagnetic and geological data are analyzed.Fault F 1 and F 2 are basically identical with the geologically delineated faults.F 3 is partly identical and a new understanding of its spatial location is put forward.This area is divided into four magnetic field regions with different characteristics and sub-magnetic fields are divided and the magnetic field characteristics,strata distribution,geotectonic location,basement properties and regional field genesis are discussed.