新疆北山地区三架山韧性剪切带构造变形特征及控矿意义
|
摘要
为进一步查明北山造山带北缘三架山韧性剪切带的构造运动学特征及控矿意义,在充分收集前人工作成果的基础上,通过开展系统的野外地质调查工作,基本查明了韧性剪切构造带的空间分布、物质组成、力学性质,在充分分析研究典型构造现象的宏观及显微构造变形特征基础上结合韧性剪切带内卷入地层变质特征和剪切带内岩石组合特征,认为三架山韧性剪切带属中浅部构造相,总体上反应出逆冲—左行走滑的特征。结合带内已发现的产于前寒武系变质基底的铅锌矿和韧性剪切带内的金矿赋矿特征,认为该韧性剪切带对前寒武系变质结晶基底的活化、古生代火山—沉积盖层的改造起到了至关重要的作用,具有明显的导矿、控矿作用。
To further investigate the tectonic movement and ore-controlling significance of the Sanjiashan ductile shear zone on the northern margin of the Beishan orogenic belt,on the basis of fully collecting the results of previous work, through carrying out the systematic field geological surveys, the spatial distribution,material composition and mechanical properties of the ductile shear zone are basically identified. After the analysis of the macroscopic and microstructural deformation characteristics of the typical tectonic phenomena, combined with the metamorphic characteristics and shearing of the stratigraphic shear zone,the characteristics of the in-band rock combination,it is considered that the Sanjiashan ductile shear zone belongs to the middle—shallow tectonic facies and generally reflects the characteristics of thrust—left—slip. Combined with the gold deposits in the lead-zinc deposits and ductile shear zones of the Precambrian metamorphic basement discovered in the belt,it is believed that the ductile shear zone plays an important role in the activation of the Precambrian metamorphic crystalline basement and the transformation of the Paleozoic volcano-sedimentary caprock,with obvious guiding and ore-controlling effects.
To further investigate the tectonic movement and ore-controlling significance of the Sanjiashan ductile shear zone on the northern margin of the Beishan orogenic belt,on the basis of fully collecting the results of previous work, through carrying out the systematic field geological surveys, the spatial distribution,material composition and mechanical properties of the ductile shear zone are basically identified. After the analysis of the macroscopic and microstructural deformation characteristics of the typical tectonic phenomena, combined with the metamorphic characteristics and shearing of the stratigraphic shear zone,the characteristics of the in-band rock combination,it is considered that the Sanjiashan ductile shear zone belongs to the middle—shallow tectonic facies and generally reflects the characteristics of thrust—left—slip. Combined with the gold deposits in the lead-zinc deposits and ductile shear zones of the Precambrian metamorphic basement discovered in the belt,it is believed that the ductile shear zone plays an important role in the activation of the Precambrian metamorphic crystalline basement and the transformation of the Paleozoic volcano-sedimentary caprock,with obvious guiding and ore-controlling effects.
引文
[1]聂凤军,江思宏,白大明,等.北山地区金属矿床成矿规律及找矿方向[M].北京:地质出版社,2002,1-408.NIE Fengjun,JIANG Sihong,BAI Daming,et al.Metallogenic studies and ore prospecting in the conjunction area of Inner Mongolia autonomous region,Gansu province and Xinjiang Uygur autonomous region(Beishan Mt.),Northwest China[M].Beijing:Geological Publishing House,2002,1-408.(in Chinese)
[2]龚全胜,刘明强,李海林,等.甘肃北山造山带类型及基本特征[J].西北地质,2002,35(3):28-34.GONG Quansheng,LIU Mingqiang,LI Hailin,et al.The type and basic characteristics of Beishan orogenic belt,Gansu[J].Northwestern Geology,2002,35(3):28-34.(in Chinese with English abstract)
[3]孙新春,张雨莲,高永伟.甘蒙北山北带古生代地壳演化与成矿作用[J].甘肃地质,2011,20(2):45-50.SUN Xinchun,ZHANG Yulian,GAO Yongwei.Paleozoic crustal evolution and mineralization of the northern Beishan in Gansu[J].Gansu Geology,2011,20(2):45-50.(in Chinese with English abstract)
[4]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.ZUO Guochao,HE Guoqi.Plate tectonics and metallogenic regularities in Beishan region[M].Beijing:Peking University Press,1990.(in Chinese)
[5]左国朝,冯永忠,刘春燕,等.甘蒙北山中南带新发现燕山早期走滑挤压推覆构造带[J].地质科学,1992,(4):309-316.ZUO Guochao,FENG Yongzhong,LIU Chunyan,et al.A new discovery of early Yanshanian strike-slip compressional Nappe zones on middle-southern segment of Beishan Mts.,Gansu[J].Scientia Geologica Sinica,1992,(4):309-316.(in Chinese with English abstract)
[6]左国朝,李茂松.甘蒙北山地区早古生代岩石圈形成与演化[M].兰州:甘肃科学技术出版社,1996.ZUO Guochao,LI Maosong.Formation and evolution of the early Paleozoic lithosphere in the Beishan area,Gansu-Inner Mongolia,China[M].Lanzhou:Gansu Science and Technology Press,1996.(in Chinese)
[7]龚全胜,刘明强,梁明宏,等.北山造山带大地构造相及构造演化[J].西北地质,2003,36(1):11-17.GONG Quansheng,LIU Mingqiang,LIANG Minghong,et al.The tectonic facies and tectonic evolution of Beishan orogenic belt,Gansu[J].Northwest Geology,2003,36(1):11-17.(in Chinese with English abstract)
[8]陈柏林.甘新北山金窝子韧性剪切带型金矿床成因[J].矿床地质,2010,29(6):972-982.CHEN Bolin.A discussion on origin of Jinwozi ductile shear zone type gold deposit in Beishan area of Gansu and Xinjiang[J].Mineral Deposits,2010,29(6):972-982.(in Chinese with English abstract)
[9]左国朝,郑亚东.1990年北山岩石圈研究野外调研取得重大突破:发现八条区域性韧性剪切带及特大型推覆构造[J].甘肃地质科技情报,1991,(1):1-4.ZUO Guochao,ZHENG Yadong.A major breakthrough in the field research of the Beishan lithosphere research:the discovery of eight regional ductile shear zones and extra-large Nappe structures[J].Gansu Geological Science and Technology Information,1991,(1):1-4.(in Chinese)
[10]陈柏林,吴淦国,刘晓春,等.北山地区发现韧性剪切带型金矿床[J].中国区域地质,2000,19(3):336.CHEN Bolin,WU Ganguo,LIU Xiaochun,et al.Discovery of a ductile shear zone type gold deposit in the Beishan Mountain area[J].Regional Geology of China,2000,19(3):336.(in Chinese with English abstract)
[11]杨合群,李英,杨建国,等.北山造山带的基本成矿特征[J].西北地质,2006,39(2):78-95.YANG Hequn,LI Ying,YANG Jianguo,et al.Main metallogenic characteristics in the Beishan orogen[J].Northwestern Geology,2006,39(2):78-95.(in Chinese with English abstract)
[12]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 Guochao,LIU Yike,LIU Chunyan.Framework and evolution of the tectonic structure in Beishan area across Gansu Province,Xinjiang autonomous region and Inner Mongolia autonomous region[J].Acta Geologica Gansu,2003,12(1):1-15.(in Chinese with English abstract)
[13]李锦轶.新疆东部新元古代晚期和古生代构造格局及其演变[J].地质论评,2004,50(3):304-322.LI Jinyi.Late Neoproterozoic and Paleozoic tectonic framework and evolution of eastern Xinjiang,NW China[J].Geological Review,2004,50(3):304-322.(in Chinese with English abstract)
[14]夏天,陈晔.复杂褶皱构造对新疆北山地区清白山铅锌矿床的影响[J].新疆地质,2017,35(4):470-473.XIA Tian,CHEN Ye.Influence of complex fold tectonic on Qinbaishan lead-zinc deposit in Beishan area,Xinjiang[J].Xinjiang Geology,2017,35(4):470-473.(in Chinese with English abstract)
[15]陈柏林,董法宪,李中坚.韧性剪切带型金矿成矿模式[J].地质论评,1999,45(2):186-192.CHEN Bolin,DONG Faxian,LI Zhongjian.Ore-forming model of ductile shear zone type gold deposits[J].Geological Review,1999,45(2):186-192.(in Chinese with English abstract)
[2]龚全胜,刘明强,李海林,等.甘肃北山造山带类型及基本特征[J].西北地质,2002,35(3):28-34.GONG Quansheng,LIU Mingqiang,LI Hailin,et al.The type and basic characteristics of Beishan orogenic belt,Gansu[J].Northwestern Geology,2002,35(3):28-34.(in Chinese with English abstract)
[3]孙新春,张雨莲,高永伟.甘蒙北山北带古生代地壳演化与成矿作用[J].甘肃地质,2011,20(2):45-50.SUN Xinchun,ZHANG Yulian,GAO Yongwei.Paleozoic crustal evolution and mineralization of the northern Beishan in Gansu[J].Gansu Geology,2011,20(2):45-50.(in Chinese with English abstract)
[4]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.ZUO Guochao,HE Guoqi.Plate tectonics and metallogenic regularities in Beishan region[M].Beijing:Peking University Press,1990.(in Chinese)
[5]左国朝,冯永忠,刘春燕,等.甘蒙北山中南带新发现燕山早期走滑挤压推覆构造带[J].地质科学,1992,(4):309-316.ZUO Guochao,FENG Yongzhong,LIU Chunyan,et al.A new discovery of early Yanshanian strike-slip compressional Nappe zones on middle-southern segment of Beishan Mts.,Gansu[J].Scientia Geologica Sinica,1992,(4):309-316.(in Chinese with English abstract)
[6]左国朝,李茂松.甘蒙北山地区早古生代岩石圈形成与演化[M].兰州:甘肃科学技术出版社,1996.ZUO Guochao,LI Maosong.Formation and evolution of the early Paleozoic lithosphere in the Beishan area,Gansu-Inner Mongolia,China[M].Lanzhou:Gansu Science and Technology Press,1996.(in Chinese)
[7]龚全胜,刘明强,梁明宏,等.北山造山带大地构造相及构造演化[J].西北地质,2003,36(1):11-17.GONG Quansheng,LIU Mingqiang,LIANG Minghong,et al.The tectonic facies and tectonic evolution of Beishan orogenic belt,Gansu[J].Northwest Geology,2003,36(1):11-17.(in Chinese with English abstract)
[8]陈柏林.甘新北山金窝子韧性剪切带型金矿床成因[J].矿床地质,2010,29(6):972-982.CHEN Bolin.A discussion on origin of Jinwozi ductile shear zone type gold deposit in Beishan area of Gansu and Xinjiang[J].Mineral Deposits,2010,29(6):972-982.(in Chinese with English abstract)
[9]左国朝,郑亚东.1990年北山岩石圈研究野外调研取得重大突破:发现八条区域性韧性剪切带及特大型推覆构造[J].甘肃地质科技情报,1991,(1):1-4.ZUO Guochao,ZHENG Yadong.A major breakthrough in the field research of the Beishan lithosphere research:the discovery of eight regional ductile shear zones and extra-large Nappe structures[J].Gansu Geological Science and Technology Information,1991,(1):1-4.(in Chinese)
[10]陈柏林,吴淦国,刘晓春,等.北山地区发现韧性剪切带型金矿床[J].中国区域地质,2000,19(3):336.CHEN Bolin,WU Ganguo,LIU Xiaochun,et al.Discovery of a ductile shear zone type gold deposit in the Beishan Mountain area[J].Regional Geology of China,2000,19(3):336.(in Chinese with English abstract)
[11]杨合群,李英,杨建国,等.北山造山带的基本成矿特征[J].西北地质,2006,39(2):78-95.YANG Hequn,LI Ying,YANG Jianguo,et al.Main metallogenic characteristics in the Beishan orogen[J].Northwestern Geology,2006,39(2):78-95.(in Chinese with English abstract)
[12]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 Guochao,LIU Yike,LIU Chunyan.Framework and evolution of the tectonic structure in Beishan area across Gansu Province,Xinjiang autonomous region and Inner Mongolia autonomous region[J].Acta Geologica Gansu,2003,12(1):1-15.(in Chinese with English abstract)
[13]李锦轶.新疆东部新元古代晚期和古生代构造格局及其演变[J].地质论评,2004,50(3):304-322.LI Jinyi.Late Neoproterozoic and Paleozoic tectonic framework and evolution of eastern Xinjiang,NW China[J].Geological Review,2004,50(3):304-322.(in Chinese with English abstract)
[14]夏天,陈晔.复杂褶皱构造对新疆北山地区清白山铅锌矿床的影响[J].新疆地质,2017,35(4):470-473.XIA Tian,CHEN Ye.Influence of complex fold tectonic on Qinbaishan lead-zinc deposit in Beishan area,Xinjiang[J].Xinjiang Geology,2017,35(4):470-473.(in Chinese with English abstract)
[15]陈柏林,董法宪,李中坚.韧性剪切带型金矿成矿模式[J].地质论评,1999,45(2):186-192.CHEN Bolin,DONG Faxian,LI Zhongjian.Ore-forming model of ductile shear zone type gold deposits[J].Geological Review,1999,45(2):186-192.(in Chinese with English abstract)