南襄盆地及邻域壳幔结构地球物理特征与油气条件分析  

Geophysical signature of crust and mantle structures in Nanxiang Basin and adjacent regions and analysis of oil and gas conditions

作　　者：杨冬[1] 王典[2] 刘殿秘[2] 王兆国[2] 贾建秀[2] 王世煜[2] 

机构地区：[1]吉林大学地球科学学院 [2]吉林大学地球探测科学与技术学院,长春130061

出　　处：《世界地质》2008年第1期48-52,共5页World Geology

基　　金：中国石化集团公司科技项目"中国东部陆缘中区区域构造成盆规律综合研究"(P00002-02)

摘　　要：位于秦岭—大别造山带中部的南襄盆地,主要由泌阳凹陷、南阳凹陷和襄樊凹陷组成。该盆地及邻域的壳幔结构主要特点是中部地壳明显比两侧地带厚,而上部地壳和下部地壳薄于两侧;Moho界面起伏较大,盆地中部Moho界面深约30 km,盆地边缘约35 km;Moho界面起伏与盆地呈"镜像关系";地震软流圈顶部在盆地一带表现为凸起"柱状"形态,最浅约70 km。根据该盆地内控制凹陷的断层形态以及泌阳凹陷油气条件,预测该盆地具有良好的油气前景。Nanxiang Basin is located in the middle of the Qinling-Dabie orogenic belt, consisting of Miyang, Nanyang and Xiangfan depressions. The main characters of the crust and mantle in the studied area are that the middle crust is much thicker than both sides, and the upper part and lower parts of the crust are thinner than both sides; the Moho interface more undulated with about 30 km in depth in the middle basin and about 35 km at the margin of the basin, The undulation of the Moho interface shows mirror image relation with the bottom interface of the basin, The top of the seismology asthenosphere presents ＂column＂ in shape in the basin area, and the lowest is about 70 kin. According to the shape of the faults controlling depressions as well as the oil and gas condition of the Miyang depression, it is predicted that the Nanxiang Basin has good oil and gas prospect.

关 键 词：南襄盆地 地球物理特征 壳幔结构 油气条件 

分 类 号：P618.130[天文地球—矿床学] P315.2[天文地球—地质学]