南襄盆地及邻域壳幔结构地球物理特征与油气条件分析
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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 km.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.
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 km.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.
引文
①杨冬.中国东部陆缘中区区域构造成盆规律综合研究.中国石化集团公司科技项目成果报告.吉林大学,2003。
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[14]孙晓猛,张梅生,刘鹏举,等.秦岭—大别造山带北部中新生代逆冲推覆构造特征[J].长春科技大学学报,2001,31(专辑):1-5.SUN Xiao-meng,ZHANG Mei-sheng,LI UPeng-ju,etal.The features of Meso-Cenozoic Era thrust-nappe tec-tonic in the north of Qinling-Dabieshan orogenic belt[J].Journal of Changchun University of Science andTechnology,2001,31(Spec.):1-5.
[1]张国伟,孟庆任,赖绍聪.秦岭造山带的结构构造[J].中国科学(B辑),1995,25(9):994-1003.ZHANG Guo-wei,MENG Qing-ren,LAI Shao-cong.Structure and tectonic in Qinling orogeny belt[J].Sci-ence in China(Ser.B),1995,25(9):994-1003.
[2]张国伟,周鼎武,于在平.大别造山带与周口断陷盆地[C]//马杏垣主编.中国大陆构造论文集.武汉:中国地质大学出版社,1992:14-23.ZHANG Guo-wei,ZHOU Ding-wu,YUZai-ping.Dabeiorogeny belt and Zhoukou fault basin[C]//MA Xing-yuan,Editor-in-Chief.Transactions Continental Tecton-ic in China.Wuhan:China University of GeosciencesPress,1992:14-23.
[3]吴利仁,徐贵忠.东秦岭—大别山碰撞造山带的地质演化[M].北京:科学出版社,1998:97-103.WU Li-ren,XU Gui-zhong.The geological evolution ofthe eastern Qinling-Dabieshan collision-orogeny belt[M].Beijing:Science Press,1998:97-103.
[4]Wang X M,Liu J G,,Mao HK.Coesite-bearing eclog-ite fromthe Dabie Mountains in central China[J].Ge-ology,1989,17:1085-1088.
[5]Okay A L,Xu S T,Sengor A M C.Coesite fromtheDabieshan eclogite,central China[J].Eur J Mineral,1989,1(4):595-598.
[6]Xu S T,Okay A L,Ji S C,et al.Diamond fromtheDabieshan metamorphic rocks and its i mplication for tec-tonic setting[J].Science,1994,256:80-92.
[7]袁学诚,徐明才,唐文榜,等.东秦岭陆壳反射地震剖面[J].地球物理学报,1994,37(6):749-758.YUAN Xue-cheng,XU Ming-cai,TANG Wen-bang,etal.Chinese Journal of Geophysics Eastern Qinlingseismicreflection profiling[J].Chinese Journal of Geophysics,1994,37(6):749-758.
[8]朱介寿,曹家敏,李显贵,等.中国及其邻区地球三维结构初始模型的建立[J].地球物理学报,1997,40(5):627-648.ZHUJie-shou,CAO Jia-min,LI Xian-gui,et al.Thereconstruction of preli minary three-di mensional earth’smodel and its i mplications in China and adjacent regions[J].Chinese Journal of Geophysics,1997,40(5):627-648.
[9]河南省地质矿产厅.河南省区域地质志[M].北京:地质出版社,1989:50-70.Geology and mineral department of Henan Province.His-tory of the regional geology of Henan Province[M].Beijing:Geological Publishing House,1989:50-70.
[10]王定一,车自成,张树田,等.南襄盆地构造发育特征与油气远景[J].石油与天然气地质,1987,8(4):363-371.WANG Ding-yi,CHE Zi-cheng,ZHANG Shu-tian,etal.Characters of structure evolution in Nanxiang Basinand the oil-gas prospect[J].Oil&Gas Geology,1987,8(4):363-371.
[11]林中洋,蔡文伯,陈学波,等.青海门源至福建宁德地学断面1:100万说明书[M].北京:地震出版社,1992:1-5.LI NZhong-yang,CAI Wen-bo,CHEN Xue-bo,et al.The manual of geoscience transect from Qinghai-Menyuan to Fujian-Ningde with scale 1∶1 000 000[M].Beijing:Seismological Press,1992:1-5.
[12]杨宝俊.在地学断面域内用地震学方法研究大陆地壳—以中国满洲里—绥芬河地学断面为例[M].北京:地质出版社,1999:101-124.YANG Bao-jun.The research to the continental crustby using seismology methodsin the geoscience transectregion—an example as China Manzhouli-Suifenhe geo-science transect[M].Beijing:Geological PublishingHouse,1999:101-124.
[13]王椿镛,张先康,吴庆举,等.华北盆地滑脱构造的地震学证据[J].地球物理学报,1994,37(5):613-620.WANG Chun-yong,ZHANG Xian-kang,WU Qing-ju,et al.Seismic evidence of detachment in North Chinabasin[J].Chinese Journal of Geophysics,1994,37(5):613-620.
[14]孙晓猛,张梅生,刘鹏举,等.秦岭—大别造山带北部中新生代逆冲推覆构造特征[J].长春科技大学学报,2001,31(专辑):1-5.SUN Xiao-meng,ZHANG Mei-sheng,LI UPeng-ju,etal.The features of Meso-Cenozoic Era thrust-nappe tec-tonic in the north of Qinling-Dabieshan orogenic belt[J].Journal of Changchun University of Science andTechnology,2001,31(Spec.):1-5.
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