内蒙古北山地区地球物理场特征与构造分区及深部结构研究
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摘要
内蒙古北山地区构造分区和深部结构历来为众多地质学家所关注,本研究从地球物理入手,采用有效的技术方法对区域重磁资料进行了处理分析,根据数据处理后的解释结果,将研究区划分为哈萨克斯坦板块东缘构造区和塔里木板块北缘两大Ⅰ级构造区以及6大Ⅱ级构造小区.推断划分北西向深大断裂构造带5条和北东向断裂构造7条.初步判断、圈定出多处磁性决体,并划分出基性岩体、中酸性岩体的分布若干处.结合重磁、地震和地质资料,对深部构造、莫氏界面和基底起伏进行了分析研究.研究结果深化了区域地质和深部构造认识,对研究区内成矿规律研究和矿产资源勘查具有一定的指示意义.
The structural division and deep structure of the Beishan area,Inner-Mongolia are always concerned by many geologists.This research starts with geophysics and then adopts advanced and effective methods to process regional magnetic and gravity data sets.The research area is divided into 2 Ⅰ-order structural areas and 6 Ⅱ-order structure areas in the east edge of the Kazakstan plate and north edge of Tarim plate hased on geophysical data process result.Five NW trending deep fault belts and 7 NE faults are inferred.Many magnetic block-bodies are marked off and the distribution of basic rock bodies and medium-acid rock bodies are marked off.Deep structure ,Moho interface and basement undulation are analyzed in conjunction with magnetic,gravity,seismic and geological data.The research result strengthens understanding for regional geology and deep structure and has important significance for metallogenic rules research and mineral prospecting in the research area.
The structural division and deep structure of the Beishan area,Inner-Mongolia are always concerned by many geologists.This research starts with geophysics and then adopts advanced and effective methods to process regional magnetic and gravity data sets.The research area is divided into 2 Ⅰ-order structural areas and 6 Ⅱ-order structure areas in the east edge of the Kazakstan plate and north edge of Tarim plate hased on geophysical data process result.Five NW trending deep fault belts and 7 NE faults are inferred.Many magnetic block-bodies are marked off and the distribution of basic rock bodies and medium-acid rock bodies are marked off.Deep structure ,Moho interface and basement undulation are analyzed in conjunction with magnetic,gravity,seismic and geological data.The research result strengthens understanding for regional geology and deep structure and has important significance for metallogenic rules research and mineral prospecting in the research area.
引文
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[13] 朱仁学.胡祥云.格尔木-额济纳旗地学断面岩石圈电性结构的研究[J].地球物理学报,1995,38(增刊Ⅱ):46-57． Zhu RX,Hu X Y.Study on the resistivity structure of the lithosphere along the Golmud-Ejinqi geoscience transect[J].ACTA Geophysica Sinica (in Chinese with English abstract),1995,38(Suppl.Ⅱ) :46-57．
[14] 黄增保,金霞.甘肃北山红石山蛇绿混杂岩带中基性火山岩构造环境分析[J].中国地质,2006,33(5) :1030-1037． Huang Z B,Jin X.Tectonic environment of basic volcanic rocks in the Hongshishan ophiolite m lange zone,Beishan Mountains[J],Gansu.Geology in China (in Chinese with English abstract),2006,33(5) : 1030-1037．
[15] 崔作舟,李秋生.格尔木-额济纳旗岩石圈结构与深部构造[M].北京:地质出版社,1999,1-222． Cui Z Z,Li Q S.Lithosphere framework and deep structure of the geosciecne transeiction from Golmud to Ejin Qi[M].Beijing:Geology Press (in Chinese),1999,1-222．
[16] 吴功建,肖序常,王乃文,等.格尔木-额济纳旗地学断面初步成果[J].中国地质,1995,10:25-28． Wu G J,Xiao X C,Wang N W,et al.The primary production of the geosciecne transeiction from Golmud to Ejin Qi[J].Geology in China (in Chinese),1995,10 : 25-28．
[2] 左国朝,何国琦.北山板块构造及成矿规律[M].北京:北京大学出版社,1990． 1-209． Zuo G C,He G Q.Plate tectonics .and metallogenic regularities in Beishan region[M].Beijing: Peking University Press (in Chinese),1990,1-209．
[3] 左国朝,刘义科,刘春燕.甘新蒙北山地区构造格局及演化[J].甘肃地质学报,2003,12(1) :1-15． Zuo G C,Liu Y K,Liu C Y.Framework and evolution of the tectonic structure in Beishan area across Gansu province,Xiniinag autonomous region and Inner Mongolia autonomous region[J].ACTA Geologica GANSU(in Chinese with English abstract) ,2003,12(1) :1-15．
[4] 吴泰然,何国琦.内蒙古阿拉善地块北缘的构造单元划分及各单元的基本特征[J].地质学报,1993,67(1) :97-108． Wu T R,He G Q.Tectonic units and their fundamental haracteristics on the northern margin of the Alxa block[J].Acta Geologica Sinica (in Chinese with English abstract),1993,67(1) :97-108．
[5] 王廷印,王士政,王金荣.阿拉善地区古生代陆壳的形成和演化[M].兰州:兰州大学出版社,1994,1-195． Wang T Y,Wang S Z,Wang J R.Formation and evolution of continental crust of Alxar egion [M].Lanzhou: Lanzhou University press (inChinese),1994,1-195．
[6] 严良俊,胡文宝,姚长利.重磁资料面积处理中的滤波增强技术与应用[J].勘探地球物理进展,2006,29(2) :102-104． Yan L J,Hu W B,Yao C L.Filtering enhancement of gravity and magnetic data in denseladder-like zone [J].Progress in exploration Geopysics (in Chinese with English abstract),2006,29(2) :102-104．
[7] 余钦范,楼海,胡中栋.格尔木-额济纳旗地学断面岩石圈结构的磁场分析[J].地球物理学报,1995,38(增刊Ⅰ):58-71． Yu Q F,Lou H,Hu Z D.Magnetic data interpretation of the crustal structure of the geosciecne transeiction from Golrnud to Ejin Qi[J].ACTA Geophysica Sinica (in Chinese with English abstract) ,1996,38 (Suppl.Ⅰ) :58-71．
[8] 刘雪亚,王荃.中国西部北山造山带的大地构造及其演化[J].地学研究,1995,28:37-48． Liu X Y,Wang Q,Tectonics of orogenic belts in Beishan Mrs.,western China and their evolution[J].Dixue Yanjiu (in Chinese with English abstract),1995,28 : 37-48．
[9] 赵希刚,吴汉宁,柏冠军,等.重磁异常解释断裂构造的处理方法及图示技术[J].地球物理学进展,2008,23(2) :414-421． Zhao XG,Wu H N,Bo G J,et al.Magnetic and gravity data processing method and imaging techniques for faulted structure interpretation[J].Progress in Geophysics (in Chinese with English abstract),2008,23(2) :414-421．
[10] 孟令顺,管烨,齐立.格尔木-额济纳旗地学断面及其邻区重力场与深部地质构造[J].地球物理学报,1995,38(增刊Ⅱ):36-45． Meng L S,Guan Y,Qi L.Gravity field and deep crustal structure in Golmud-Ejin Qi Geoscience trisection and nearby area[J].ACTA Geophysica Sinica (in Chinese with English abstract),1995,38(Suppl.Ⅱ): 36-45．
[11] 王泽九,吴功建,肖序常.格尔木-额济纳旗地学断面多学科综合调查研究概况[J].地球物理学报,1995,38(增刊Ⅱ):1-2． Wang Z J,Wu G J,Xiao X C.Outlines of the multidisciplinary studies along Golmud-Ejinaqi geoscience transect[J].ACTA Geophysica Sinica (in Chinese with English abstract),1995,38 (Suppl.Ⅱ):1-2．
[12] 高锐,成湘洲,丁谦.格尔木-额济纳旗地学断面地球动力学模型初探[J].地球物理学报,1995,38(增刊Ⅱ):3-14． Gao rui,Cheng xiangzhou,Ding qian.Preliminary geodynamic model of Golmud-Ejinqi geoscienee transext[J].ACTA Geophysica Sinica (in Chinese with English abstract),1995,38(supplement Ⅱ) :3-14．
[13] 朱仁学.胡祥云.格尔木-额济纳旗地学断面岩石圈电性结构的研究[J].地球物理学报,1995,38(增刊Ⅱ):46-57． Zhu RX,Hu X Y.Study on the resistivity structure of the lithosphere along the Golmud-Ejinqi geoscience transect[J].ACTA Geophysica Sinica (in Chinese with English abstract),1995,38(Suppl.Ⅱ) :46-57．
[14] 黄增保,金霞.甘肃北山红石山蛇绿混杂岩带中基性火山岩构造环境分析[J].中国地质,2006,33(5) :1030-1037． Huang Z B,Jin X.Tectonic environment of basic volcanic rocks in the Hongshishan ophiolite m lange zone,Beishan Mountains[J],Gansu.Geology in China (in Chinese with English abstract),2006,33(5) : 1030-1037．
[15] 崔作舟,李秋生.格尔木-额济纳旗岩石圈结构与深部构造[M].北京:地质出版社,1999,1-222． Cui Z Z,Li Q S.Lithosphere framework and deep structure of the geosciecne transeiction from Golmud to Ejin Qi[M].Beijing:Geology Press (in Chinese),1999,1-222．
[16] 吴功建,肖序常,王乃文,等.格尔木-额济纳旗地学断面初步成果[J].中国地质,1995,10:25-28． Wu G J,Xiao X C,Wang N W,et al.The primary production of the geosciecne transeiction from Golmud to Ejin Qi[J].Geology in China (in Chinese),1995,10 : 25-28．
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