准噶尔盆地基底构造与地壳分层结构  

Basements and Crust Structures in Junggar Basin

作　　者：曲国胜[1] 马宗晋[2] 邵学钟[2] 张先康[3] 

机构地区：[1]中国地震应急搜救中心,北京100049 [2]中国地震局地质研究所,北京100029 [3]中国地震局地球物理探测中心,郑州450002

出　　处：《新疆石油地质》2008年第6期669-674,共6页Xinjiang Petroleum Geology

基　　金：国家自然科学基金项目(40572116);新疆油田公司科技项目共同资助

摘　　要：基于4条盆地转换波剖面、1条人工地震深反射-折射剖面和重磁反演以及相关深部探测结果,将准噶尔盆地地壳结构划分为3个构造层,即沉积盖层、古生界褶皱基底层和结晶地壳层,确定了B、G、C(1或G1)、C和M界面及其参数特征。盆地具褶皱基底与结晶基底的"双层基底"构造特征,为陆壳性质。现今总体表现为东侧、北侧和西侧埋深较浅,盆地中部由北往南呈倾斜加深;褶皱基底北厚南薄,三个泉凸起带以北厚度为4～10km,以南为0～4km,昌吉凹陷一带最薄,为0～1km.盆地的莫霍面存在卡拉麦里-乌伦古北西西向上地幔隆起区、卡拉麦里-帐北和加依尔-四棵树南北向上地幔隆起区以及由此分割的凹陷区和斜坡带。On the basis of preview associated with basement research progress and the problems about Junggar basin, the crust in this basin is divided into three structural layers including sedimentary cap rock, Palaeozoic folded basement and crystal basement, according to the deep exploration results which include 4 exploration profiles by method of DSCW and one seismic reflection/refraction profile and inversion of gravity and magnetism, ascertaining B, G, C1 （or G1）, C and M interfaces with their parameters. The 3D model results show that the folded and crystal basement has ＂double basement＂ feature, belonging to continental crust. The present structure is buried shallower on the eastern, northern and western sides of it, and its middle part runs dip and deep from north to south. The thickness of folded basement is thicker in the north than in the south. The thickness of Sangequan swell is about 4-10 km in the north and 0-4 km in the south, and Changji sag is the thinnest between 0 km and 1 km. NWW-trending Kelameili-Wulungu upper mantle uplift, SN-treuding Karameli-Zhangbei and Zayier-Sikeshu upper mantle uplift as well as sags and slopes in Junggar basin are all presented in this paper.

关 键 词：准噶尔盆地 褶皱基底 结晶基底 陆壳性质 地壳分层 

分 类 号：TE111.2[石油与天然气工程—油气勘探]