大兴安岭西坡德尔布干断裂地球物理特征与构造属性
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摘要
对1:250万重力异常向上延拓不同高度并分别计算135°方向水平导数,德尔布干断裂表现为北东向延伸的重力场分界线,采用基于DCT法欧拉反褶积对1:10万高精度重磁数据向上延拓O～20 km追踪断裂轨迹,并进行l:100万大地电磁测深反演和海拉尔盆地地震剖面解释,识别出德尔布干断裂具有向南东倾斜,切割深度至下地壳的特征.结合实测地质剖面和显微构造研究,认为德尔布干断裂的构造属性不是地块之间和不同时期造山带之间的拼接带,而是在晚侏罗世一早白垩世切割至下地壳北东向延伸的大型伸展变形带,也是晚中生代隆起区与根河-拉不大林-海拉尔盆地之间的控盆边界断裂带.
The upward continuation of 1:2500000 gravity anomalies was calculated for different heights,and direction of 135° horizontal derivatives respectively,the Derbugan fault showed as a gravity field demarcation line of NE extension,Through calculating the 0 ～ 20 km upward continuation by the Euler deconvolution,based on the method of DCT (Discrete Cosine Transform),of the 1:100000 high-precision gravity and magnetic data to track the fault trajectory,and combining 1:1000000 magnetotelluric sounding inversion and the geological interpretation of seismic profiles of Hailar basin,we identified Derbugan fault with the characteristics of southeast direction dip and cutting lower crust.Combining the study of the measured geological section and the microstructure,it is considered that tectonic attribute of the Derbugan fault is not the matching belt between massif and massif,orogenic belt and orogenic belt in different periods,but it is a NE extending,large-scale extensional deformation zone cutting lower crust in Late Jurassic-Early Cretaceous.And it is also the boundary fault zone of control basin between the uplift region and the basin in Genhe,Labudalin and Hailar in Late Mesozoic era.
The upward continuation of 1:2500000 gravity anomalies was calculated for different heights,and direction of 135° horizontal derivatives respectively,the Derbugan fault showed as a gravity field demarcation line of NE extension,Through calculating the 0 ～ 20 km upward continuation by the Euler deconvolution,based on the method of DCT (Discrete Cosine Transform),of the 1:100000 high-precision gravity and magnetic data to track the fault trajectory,and combining 1:1000000 magnetotelluric sounding inversion and the geological interpretation of seismic profiles of Hailar basin,we identified Derbugan fault with the characteristics of southeast direction dip and cutting lower crust.Combining the study of the measured geological section and the microstructure,it is considered that tectonic attribute of the Derbugan fault is not the matching belt between massif and massif,orogenic belt and orogenic belt in different periods,but it is a NE extending,large-scale extensional deformation zone cutting lower crust in Late Jurassic-Early Cretaceous.And it is also the boundary fault zone of control basin between the uplift region and the basin in Genhe,Labudalin and Hailar in Late Mesozoic era.
引文
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[26] 邵济安,张履桥,贾文等.内蒙古喀喇沁变质核杂岩及其隆升机制探讨.岩石学报,2001,17(2) :283～290 Shao J A,Zhang L Q,Jia W,et al.Harkin metarnorphic core complex in Inner Mongolia and its upwelling mechanism.Acta Petrologica Sinica (in Chinese),2001,17(2) :283～290
[27] Davis G A,Darby B J,Zheng Y et al.Geometric and temporal evolution of an extensional detachment fault,Hohhot metarnorphic core complex,Inner Mongolia,China.Geology,2002,30(11) :1003～1006
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[31] 任建业,李思田,焦贵浩.二连盆地群伸展构造系统及其发育的深部背景.地球科学-中国地质大学学报,1998,23(6) :567～572 Ren J Y,Li S T,Jiao G H.Extensional tectonic system of Erlian fault basin group and its deep background.Earth Science-Journal of China University of Geosciences (in Chinese),1998,23(6) :567～572
[2] 祝洪臣,张炯飞,权恒.大兴安岭中生代两期成岩成矿作用的元素、同位素特征及其形成环境.吉林大学学报(地球科学版),2005,35(4) :436～442 Zhu H C,Zhang J F,Quan H.Two stages of Mesozoic lithogenesis and mineralization in Daxing anling mountains.Journal of Jilin University ( Earth Science Edition) (in Chinese),2005,35(4) :436～442
[3] 祁进平,陈衍景,Franco Pirajno.东北地区浅成低温热液矿床的地质特征和构造背景.矿物岩石,2005,25(2) :47～59 Qi J P,Chen Y J,Pirajno F.Geological characteristics and tectonic setting of the epithermal deposits in the northeast China.J Mineral Petrol (in Chinese),2005,25(2) :47～59
[4] 权恒,张炯飞,武广等.德尔布干有色、贵金属成矿区、带划分.地质与资源,2002,11(1) :38～42 Quan H,Zhang J F,Wu G,et al.Division of Derbugan metallogenic provinces and belts of nonferrous and precious metals.Geology and Resources(in Chinese),2002,11(1) :38～42
[5] 刘财,孟令顺等.东北地球物理场与地壳演化.北京:地质 出版社,2010,82～88,116～117,183～190 Liu C,Meng L S.Geophysical Fields and Crustal Evolution in Northeast,China (in Chinese).Beijing:Geological Publishing House,2010,82～88,116～117,183～190
[6] 杨宝俊,穆石敏,金旭等.中国满洲里绥芬河地学断面地球物理综合研究.地球物理学报,1996,39(6) :772～782 Yang B J,Mu S M,Jin X,et al.Synthesized Study of the Geophysics of Manzhouli-Suifenhe geoscience transect.Chinese J.Geophys.(in Chinese),1996,39(6) :772～782
[7] 傅维洲,杨宝俊,刘财等.中国满洲里绥芬河地学断面地震学研究.长春科技大学学报,1998,28(2) :206～212 Fu W Z,Yang B J,Liu C,et al.Study on the seismology in Manzhouli-Suifenhe geoscience transect of China,journal of Changchun University of Science and Technology (in Chinese),1998,28(2) :206～212
[8] 刘志宏,万传彪,任延广等.海拉尔盆地乌尔逊-贝尔凹陷的地质特征及油气成藏规律.吉林大学学报(地球科学版),2006,36(4) :527～534 Liu Z H,Wan C B,Ren Y G,et al.Geological features and the rule of oil and gas accumulation of Urxun-Beier depression in Hailaer basin.Journal of Jilin University (Earth Science Edition) (in Chinese),2006,36(4) :527～534
[9] 曹瑞成,朱德丰,陈均亮等.海拉尔塔木察格盆地构造演化特征.大庆石油地质与开发,2009,28(5) :39～43 Cao R C,Zhu D F,Chen J L,et al.Structural evolution features of Hailaer-Tamtsag basin.Petroleum Geology and Oilfield Development in Daqing (in Chinese),2009,28(5) :39～43
[10] 杨振升,徐仲元,刘正宏等.高级变质区地质调查与综合研究方法.北京:地质出版社,2008． 61～93 Yang Z S,Xu Z Y,Liu Z H,et al.The Geological Survey and Comprehensive Study Technique of the High-grade Metamorphic Terrain (in Chinese).Beijing:Geological Publishing House,2008． 61～93
[11] 刘正宏,徐仲元,杨振声等.变质构造岩类型及其特征.吉林大学学报(地球科学版).2007． 37(1) :24～30 Liu Z H,Xu Z Y,Yang Z S,et al.Metamorphic tectonite types and their characteristics.Journal of Jilin University (Earth Science Edition) (in Chinese),2007,37(1) :24～30
[12] 刘正宏,徐仲元,王可勇.大青山高级变质岩中复晶石英条带成因的显微构造和流体包裹体证据.中国科学(D辑),2007,37(4) :488～494 Liu Z H,Xu Z Y,Wang K Y.Evidence of microstructure and fluid inclusion of origin of multi-crystal quartz band in high-grade metamorphic rock in Daqingshan area.Science in China (D) (in Chinese),2007,37(4) :488～494
[13] 李春昱.中国板块构造轮廓.中国科学院院报,1980,2(1) :11～22 Li C Y.A preliminary study of plate tectonics of China.Acta Geoscientia Sinica (in Chinese),1980,2(1) :11～22
[14] 曹生儒.对内蒙古板块构造轮廓的新认识.中国区域地质,1993,(3) :211～216 Cao S R.The framework of plate tectonics of Inner Mongolia.Regional Geology of China (in Chinese),1993,(3) :211～216
[15] 王鸿祯,何国琦,张世红.中国与蒙古之地质.地学前缘,2006,13(6) :1～13 Wang H Z,He G Q,Zhang S H.The geology of China and Mongolia.Earth Science Frontiers (in Chinese),2006,13(6) :1～13
[16] 潘桂棠,肖庆辉,陆松年等.中国大地构造单元划分.中国地质,2009,36(1) :1～28 Pan G T,Xiao Q H,Lu S N,et al.Subdivision of tectonic units in China.Geology in China (in Chinese),2009,36(1) :1～28
[17] 郑常青,周建波,金巍等.大兴安岭地区德尔布干断裂带北段构造年代学研究.岩石学报,2009,25(8) :1989～2000 Zheng C Q,Zhou J B,Jin W,et al.Geochronology in the north segment of the Derbugan fault zone,Great Xing an Range,NE China.Acta Petrologica Sinica (in Chinese),2009,25(8) :1989～2000
[18] 张贻侠,孙运生,张兴洲等.中国满洲里绥芬河地学断面.北京:地质出版社,1999． 6～19 Zhang Y X,Sun Y S,Zhang X Z,et al.Manzhouli to Shuifenhe of China Global Geoscience Transect (GGT) (in Chinese).Beijing:Geological Publishing House,1999． 6～19
[19] 姚伯初,万玲.中国南海海域岩石圈三维结构及演化.北京:地质出版社,2006． 40～64 Rao B C,Wan L.The Three-dimensional Structure of Lithosphere and Its Evolution in the South China Sea (in Chinese).Beijing:Geological Publishing House,40～64
[20] 张国伟,张本仁,袁学诚等.秦岭造山带与大陆动力学.北京:科学出版社,2001． 336～351 Zhang G W,Zhang B Y,Yuan X C,et al.The Qinling Orogenic Belt and Continental Dynamics (in Chinese).Beijing:Science Press,2001． 336～351
[21] 肖序常,刘训,高锐.新疆南部地壳结构和构造演化.北京:商务印书馆,2004． 16～34 Xiao X C.Liu X,Gao Lui.The crustal structure and tectonic evolution of southern Xinjiang,China (in Chinese).Beijing:Commercial Press,2004． 16～34
[22] 武广,权恒,张炯飞等.德尔布于成矿区黑山头以北地区重、磁、遥构造解译.地质与资源,2002,11(1) :53～58 Wu G,Quan H,Zhang J F,et al.The structural intepretation of gravity field,magnetic field and remote sensing of the northern Heishantou in the Derbugan metallogenic province.Geology and Resources (in Chinese),2002,11(1) :53～58
[23] 陈均亮,吴河勇,朱德丰等.海拉尔盆地构造演化及油气勘探前景.地质科学,2007,42(1) :147～159 Chen J L,Wu H Y,Zhu D F,et al.Tectonic evolution of the Hailaer basin and its potentials of oil-gas exploration.Chinese Journal of Geology (in Chinese),2007,42(1) :147～159
[24] Zorin Y A.Geodynamics of the western part of the Mongolia-Okhotsk collisional belt,Trans-Baikal region (Russia) and Mongolia.Tectonophysics,1999,306:33～56
[25] Dongskaya T V,Windley B F,Mazukabzov AM,et al.Age and evolution of late Mesozoic metarnorphic core complexes in southern Siberia and northern Mongolia.Journal of the Geological Society,2008,165:405～421
[26] 邵济安,张履桥,贾文等.内蒙古喀喇沁变质核杂岩及其隆升机制探讨.岩石学报,2001,17(2) :283～290 Shao J A,Zhang L Q,Jia W,et al.Harkin metarnorphic core complex in Inner Mongolia and its upwelling mechanism.Acta Petrologica Sinica (in Chinese),2001,17(2) :283～290
[27] Davis G A,Darby B J,Zheng Y et al.Geometric and temporal evolution of an extensional detachment fault,Hohhot metarnorphic core complex,Inner Mongolia,China.Geology,2002,30(11) :1003～1006
[28] 邵济安,张履桥,肖庆辉等.中生代大兴安岭的隆起一一种可能的陆内造山机制.岩石学报,2005,21(3) :789～794 Shao J A,Zhang L Q,Xiao Q H,et al.Rising of Daxing' anling mountains in Mesozoic;A possible mechanism of intracontinental orogeny.Acta Petrologica Sinica(in Chinese),2005,21(3) :789～794
[29] Meng Q R.What drove late Mesozoic extension of the northern China-Mongolia tract?Tectonophysics,2003,369:155～174
[30] Meng Q R,Hu J M,Jin J Q,et al.Tectonics of the late Mesozoic wide extensional basin system in the China-Mongolia border region.Basin Research,2003,15:397～415
[31] 任建业,李思田,焦贵浩.二连盆地群伸展构造系统及其发育的深部背景.地球科学-中国地质大学学报,1998,23(6) :567～572 Ren J Y,Li S T,Jiao G H.Extensional tectonic system of Erlian fault basin group and its deep background.Earth Science-Journal of China University of Geosciences (in Chinese),1998,23(6) :567～572
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