【摘要】 利用准噶尔盆地及周边地区1∶200000重磁异常,采取多种处理与分析方法,在准噶尔盆地内共确定主要断裂48条,其中一级断裂7条、二级断裂6条、三级断裂35条。尤其是通过详细的资料处理,并结合盆地盖层沉积特点确定了基底南北、东西向断裂F6、F1的存在。研究认为,准噶尔盆地可划分为Ⅰ(南部)、Ⅱ(中部)、Ⅲ(北部)3个一级构造区,其中Ⅱ(中部)构造区可进一步划分为4个亚区并构成盆地内部的4个象限,而其中的每个象限又可划分出若干个次一级的构造单元。这4个象限的结构、密度分布、磁化强度各不相同,形成空间与时间上的差异特征。更多还原

【Abstract】 Based on the 1:200 000 gravitational and magnetic anomalies, the 48 faults in Junggar basin including 7 of first class, 6 of second class and 35 of third class have been determined, by means of multi-processing and analyses. In particular, the fault F6 in EW orientation and the fault F1 in SN orientation have been determined by detailed data processing and combining with crystalline basement deposition feature of the basin. The study shows that Junggar basin can be classified into such three first tectonic regions as Region Ⅰ (southern part), Region Ⅱ (middle part) and Region Ⅲ (northern part). The Region Ⅱ can be further divided into 4 sub-regions, forming a four-phase pattern. The each phase can be also divided into several further secondary geotectonic units. The structure, density and magnetic intensity are different in each phase, composing some differences in time and space.更多还原