摘要
对准噶尔盆地基底地球物理异常和深部探测剖面以及盆地盖层断裂、构造格局、分区进行综合分析后指出,基底总体表现为北高南低,东高西低的构造格局;沉降中心在盆地南缘和加依尔山之下,盆地内部、西缘、东缘沉降中心不断变迁,构成了沉降与隆升不断变化的时空格局;基底构造格局受陆梁隆起和南缘东西向基底断裂的控制,分为北部陆梁隆起区、南部大型坳陷区,盆地南部基底构造形态为方形的基坑状坳陷区,陆梁隆起西侧为玛湖坳陷。综合褶皱基底、结晶基底构造及其组合样式,将准噶尔盆地基底构造划分为陆梁-乌伦古隆起区(Ⅰ)、玛湖坳陷区(Ⅱ)、沙湾坳陷区(Ⅲ)和昌吉坳陷区(Ⅳ),并在此基础上对准噶尔盆地现今构造进行了分区。
By the comprehensive interpretations of gravity and magnetic anomalies and seismic reflection and deep sounding profiles of basement, and studies on fault systems and structural framework and divisions of sedimentary cover rocks in Junggar basin, it is shown that the depth of basement of Junggar basin is shallow in north and east, deep in south and west, the depression centers are located in the southern margin of basin and beneath the Zayer mountain. The depression centers change the locations from inner, western and eastern margins of the basin, which form the framework of depressions and uplifts in different geological time. Controlled by Luliang uplift and E-W strike-slip faults in the southern margin of the basin, the framework of basement structure in Junggar basin is divided into Luliang uplift area in the north and huge depression area in the south. The structural style of the basin basement in the south looks like a quadrate footing groove, Mahu depression is located in west side of Luliang uplift. Based on the structures and assemblages of folded and crystal basement, the basement structures of Junggar basin can be divided into Luliang-Wulungu uplift （Ⅰ）, Mahu depression （Ⅱ）, Shawan depression （Ⅲ） and Changji depression （Ⅳ）.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2008年第1期1-6,共6页
Xinjiang Petroleum Geology
关键词
准噶尔盆地
构造格架
构造分区
Junggar basin
tectonic framework
tectonic division
