鄂尔多斯盆地南部环形影像特征及地质意义
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摘要
为了研究鄂尔多斯盆地中-新生代时期的演化,采用遥感技术与地球物理资料综合分析方法,对CBERS和ETM+卫星影像的处理,在鄂尔多斯盆地南部发现直径大于300 km的环形构造,环形中心位于甘肃省东部的东华池附近。该环形构造内西部为西峰油田,中东部有古生界—中生界大型煤田,东南和西北部都有铀矿的发现,4种能源矿产(石油、天然气、煤和铀)居于环中。地球物理和地震资料综合分析证明,该环形构造为一相对独立的块体,其活动既有升降,又有旋转,受深部控制,主要是中—新生代造山作用(印支运动、燕山运动和喜山运动)联合作用的结果,对多能源矿产同盆共存具有重要的控制作用。
Through processing the CBERS and ETM+satellite image,a ring structure which is about to 300km in diameter was found in the southern Ordos basin.The center of the ring approximately locates at Donghuachi in the east of Gansu province.From the point of view of topography,the main body of the ring is plus-topography,except for the southeastern part of the ring.There are four energy source mineral deposits in the ring conformation.The Xifeng oil field occurs in the western part of the ring structure,a large Mesozoic coalfield in the central-eastern,and uranium deposits both in southeastern and northwestern.It is testified that the ring has close correlation with deep-seated structure and dominated by the mantle plume in the deep of the earth through the comprehensive study of physical geography and natural earthquake.It is the result of the united effects of the orogenic activities during Mesozoic to Cenozoic period(Indo-China movement,Yanshan movement,Himalayan movement).It acts as the interior power to the coexistence of multi-energy sources in the same basin.This cognition has a very important value to study mechanism of the formation of the craton basin and guide geological exploration.
Through processing the CBERS and ETM+satellite image,a ring structure which is about to 300km in diameter was found in the southern Ordos basin.The center of the ring approximately locates at Donghuachi in the east of Gansu province.From the point of view of topography,the main body of the ring is plus-topography,except for the southeastern part of the ring.There are four energy source mineral deposits in the ring conformation.The Xifeng oil field occurs in the western part of the ring structure,a large Mesozoic coalfield in the central-eastern,and uranium deposits both in southeastern and northwestern.It is testified that the ring has close correlation with deep-seated structure and dominated by the mantle plume in the deep of the earth through the comprehensive study of physical geography and natural earthquake.It is the result of the united effects of the orogenic activities during Mesozoic to Cenozoic period(Indo-China movement,Yanshan movement,Himalayan movement).It acts as the interior power to the coexistence of multi-energy sources in the same basin.This cognition has a very important value to study mechanism of the formation of the craton basin and guide geological exploration.
引文
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[27]Crone A J,Hailer K M.Segmentation and Coseismic Behav-ior of Basin and Rage Nomal Faults:Examples from East-centralIdaho and South-western Montana,USA[J].Journalof Structural Geology,1998,13(2):151 164.
[2]邓兆伦,曹书静,崔新省.运用遥感和地学信息探讨华北地台北缘边界断裂[J].国土资源遥感,1995(2):15 22.
[3]Brandon M T,Garver.Provenance Studies of Columbia-England by Fission Tracks Analysis[J].Chemical Geology,1994,89:37 52.
[4]郝天珧,刘伊克,段昶.根据重、磁资料探讨中国东部及其邻域断裂体系[J].地球物理学报,1996,39(增刊):141 149.
[5]赵洪格.鄂尔多斯盆地西部构造特征及演化[D].西安:西北大学,2003.
[6]国家地震局地学断面编委会.上海奉贤至内蒙古阿拉善左旗地学断面[M].北京:地震出版社,1992.
[7]汪素云,Hearn T M.中国大陆上地慢顶部Pn速度结构[J].中国科学:D辑,2001,31(6):449 455.
[8]汤锡元,郭忠铭.陕甘宁盆地西缘逆冲推覆构造及油气勘探[M].西安:西北大学出版社,1992.
[9]杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社,2002.
[10]屈健鹏,朱佐全,杨国栋,等.鄂尔多斯地块西缘定边—景泰地壳、上地幔电性结构分析[J].西北地震学报,1998,20(2):70 75.
[11]赵重远,刘池阳.华北克拉通沉积盆地形成与演化及其油气赋存[M].西安:西北大学出版社,1990.
[12]王锋,刘池洋,赵红格.鄂尔多斯地块西部南北向拆离滑覆构造[J].地球科学与环境学报,2004,26(1):17 20.
[13]张抗.鄂尔多斯断块构造和资源[M].西安:陕西科学技术出版社,1989.
[14]周立发,赵重远,郭忠铭.阿拉善及邻区沉积盆地的形成与演化[M].西安:西北大学出版社,1995.
[15]邢集善,刘建华,赵晋泉.华北板内深部构造[J].山西地震,2002(4):3 12.
[16]Hayward N,Ebinger C J.Variations in the Along-axis Seg-mentation of the Afar Rift System[J].Tectonics,1996,15(2):244 257.
[17]邓晋福,苏尚国,赵海玲.华北地区燕山期岩石圈减薄的深部过程[J].地学前缘,2003,10(3):41 50.
[18]赵国春,吴福元.地慢柱构造理论研究若干问题及研究进展[J].地质科技情报,1995,14(2):1 6.
[19]程顺有,张国伟,李立.秦岭造山带岩石圈电性结构及其地球动力学意义[J].地球物理学报,2003,46(3):390 397.
[20]郑孟林,王桂梁.38°构造带及其对晚古生代煤系的控制作用[J].中国煤田地质,1995,7(4):32 35.
[21]谭永杰.鄂尔多斯盆地南缘构造性质及其控煤意义[J].中国煤田地质,1994,6(3):78 83.
[22]王双明.鄂尔多斯盆地聚煤规律及煤炭资源评价[M].北京:煤炭工业出版社,1996.
[23]钱锋,艾永峰.鄂尔多斯南部地区早古生代大陆边缘演化特征[J].西安工程学院学报,2002,24(1):18 24.
[24]党D.鄂尔多斯盆地构造沉积演化与下古生界天然气聚集关系研究[D].西安:西北大学,2003.
[25]王宏强.鄂尔多斯中生代盆地构造应力场特征及其转换与沉积构造格局[D].西安:西北大学,2001.
[26]Hendrix M S,Dumitru T A,Graham S T.Late Oligocene-earlyMiocene Unroofing in the Chinese Tian Shan:An Early Effect ofthe Indian-Asian Collision[J].Geology,1994,22:487 490.
[27]Crone A J,Hailer K M.Segmentation and Coseismic Behav-ior of Basin and Rage Nomal Faults:Examples from East-centralIdaho and South-western Montana,USA[J].Journalof Structural Geology,1998,13(2):151 164.
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