青海五龙沟金矿幔枝构造成矿与深部矿源
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摘要
文章论述了五龙沟金矿田的区域幔枝构造特征、矿区幔枝构造特征、矿床幔枝构造特征及其成矿过程,进一步通过硫、铅、氢、氧、碳同位素特征及流体包裹体特征的分析,认为矿田位于可可西里-巴颜喀拉地幔亚热柱东昆仑幔枝构造区,受五龙沟变质核杂岩构造的控制,变质核杂岩是幔枝构造活动晚期阶段在地表的表现形式,岩浆侵入以及南北向应力作用形成变质核杂岩构造及其北西向的韧脆性断裂系统。矿质来源为深部幔源,深切地幔的超岩石圈韧性断裂沟通了深部及地表,金银多金属矿源随岩浆沿北西向韧性断裂侵入而向地表运移,在构造扩容段成矿。超岩石圈韧性断裂其深部表现为韧性剪切变形,浅部表现为脆性断裂,金银多金属矿含矿热液在韧性剪切带与脆性断裂的构造转换部位成矿,受北西向的韧脆性断裂控制,主成矿时代为幔枝构造产物变质核杂岩构造活动的印支期,其余阶段为次要成矿阶段,不具备主导地位。
This paper discussed the regional mantle branch structure characteristics,mine field mantle branch structure characteristics and deposit mantle branch structure characteristics of Wulonggou gold deposit and its metallogenic process,conducted detail anylsis on isotope characteristics of sulfur,lead,hydrogen,oxygen and carbon and characteristics of fluid inclusions,and then concluded that the ore field is located in the Kekexili-Bayankala Sub-mantle plume area and is controlled by Wulonggou metamorphic core complex structure; the metamorphic core complex in the mine field is in the late stage mantle branch structure activity' results which appear on ground; the metamorphic core complex structure and NW ductile-brittle fracture system formed under the forces of the magma intrusion and NS stresses. In addition,it has been concluded that the ore-forming sources came from deep mantle,the translithospheric ductile fracture in deep mantle passed from deep to surface,the gold and silver polymetallic magma intruded into NW ductile fracture and migrated towards the surface and formed ores in the expansion area.The deep part of the translithospheric ductile fracture is characterized as ductile shear deformation,while the shallow part is characterized as brittle fracture. The gold and silver polymetallic ore-bearing hydrothermal transformed into ores in the conversion site of ductile shear zone and brittle fracture,where is controlled by the NW ductile-brittle fracture. The main metallogenic epoch is indo-chinese period when the mantle branch structure resulted in the metamorphic core complex tectonic activities. Other secondary mineralization stages do not have the leading position in ore-forming.
This paper discussed the regional mantle branch structure characteristics,mine field mantle branch structure characteristics and deposit mantle branch structure characteristics of Wulonggou gold deposit and its metallogenic process,conducted detail anylsis on isotope characteristics of sulfur,lead,hydrogen,oxygen and carbon and characteristics of fluid inclusions,and then concluded that the ore field is located in the Kekexili-Bayankala Sub-mantle plume area and is controlled by Wulonggou metamorphic core complex structure; the metamorphic core complex in the mine field is in the late stage mantle branch structure activity' results which appear on ground; the metamorphic core complex structure and NW ductile-brittle fracture system formed under the forces of the magma intrusion and NS stresses. In addition,it has been concluded that the ore-forming sources came from deep mantle,the translithospheric ductile fracture in deep mantle passed from deep to surface,the gold and silver polymetallic magma intruded into NW ductile fracture and migrated towards the surface and formed ores in the expansion area.The deep part of the translithospheric ductile fracture is characterized as ductile shear deformation,while the shallow part is characterized as brittle fracture. The gold and silver polymetallic ore-bearing hydrothermal transformed into ores in the conversion site of ductile shear zone and brittle fracture,where is controlled by the NW ductile-brittle fracture. The main metallogenic epoch is indo-chinese period when the mantle branch structure resulted in the metamorphic core complex tectonic activities. Other secondary mineralization stages do not have the leading position in ore-forming.
引文
陈柏林,邓元良,陈建林,等.2016.青海五龙沟金矿田两种控矿构造识别及其找矿意义[J].大地构造与成矿学,40(2):224-236.
崔廷军,雷延军,傅星.2012.青海五龙沟金矿田成因模式浅析[J].矿产勘查,3(5):644-648.
韩玉,陈柏林,邓元良,等.2017.青海五龙沟金矿田两期蚀变作用及其找矿意义[J].地质学报,91(3):561-570.
寇林林,罗明非,钟康惠,等.2010.青海五龙沟金矿矿集区Ⅰ号韧性剪切带40Ar/39Ar年龄及地质意义[J].新疆地质,28(3):330-333.
李厚民,沈远超,胡正国,等.2001.青海东昆仑五龙沟金矿床成矿条件及成矿机理[J].地质与勘探,37(1):65-69.
李厚民,钱壮志,胡正国,等.1999.青海省都兰县五龙沟地区金矿化类型[J].青海地质,8(1):36-41.
李厚民,沈远超,胡正国,等.2001.青海五龙沟金矿床矿石、矿物含金性及金的赋存状态[J].矿物学报,21(1):89-94.
李磊,钟康惠,田承胜,等.2010.青海省五龙沟地区红旗沟金矿床地质特征[J].科协论坛(下半月),(01):114-116.
刘世宝,魏占浩,窦光源,等.2016.青海省都兰县五龙沟金矿床矿体富集规律及其预测效果[J].华南地质与矿产,32(01):43-50.
刘增铁,任家琪,杨永征,等.2005.青海金矿[M].北京:地质出版社,187-211.
刘振锋,石灵.2013.青海五龙沟淡水沟-红旗沟金矿床研究[J].地球,(7):88+86.
陆露,张延林,吴珍汉,等.2013.青海省都兰县五龙沟金矿主断裂带断层泥K-Ar定年[J].地质力学学报,19(04):385-391+446.
马福贵,田承盛,马国栋,等.2016.青海五龙沟金矿成矿时代的进一步研究和确定[J].地质与资源,25(05):449-453.
马国栋,贾建团,韩玉,等.2016.青海五龙沟金矿矿床成因及成矿模式探讨[J].西北地质,49(04):172-178.
钱壮志,李厚民,胡正国.1997.青海五龙沟地区金矿控矿构造研究[J].西安地质学院学报,增刊,19(9):27-32.
石金友.1997.青海省都兰县五龙沟金矿成矿地质特征及找矿标志[J].前寒武纪研究进展,20(02):29-36.
王守良,王荆程.2014.青海省都兰县五龙沟金矿区韧性剪切带分析[J].地球,(2):48-49.
王铜,吕古贤.2013.青海东昆仑中段五龙沟金矿构造特征与矿床学研究[J].矿物学报,增刊:970-971.
王铜.2015.青海五龙沟金矿床地质特征与成因研究[D].中国地质大学(北京)硕士学位论文,1-75.
魏占浩,孙凤舟,陈苏龙,等.2015.青海五龙沟金矿集区Ⅺ矿带构造叠加晕特征与深部预测[J].地质找矿论丛,30(04):614-622.
徐新文,段建华,路耀祖,等.2017.鄂拉山幔枝构造成矿与深部矿源[J].矿产与地质,31(2):220-233.
徐新文,路耀祖,段建华.2017.青海白日其利金矿幔枝构造控矿特征及成矿预测[J].现代矿业,33(05):1-8+25.
徐新文,路耀祖,段建华.等.2015.青海中东部鄂拉山幔枝构造特征的初步探讨[J].青海国土经略(06):62-66.
许玉豪,刘建栋,杨波.2013.青海五龙沟金矿矿床地质特征[J].地球,(7):93-94.
袁万明,王世成,王兰芬.2000.东昆仑五龙沟金矿床成矿热历史的裂变径迹热年代学证据[J].地球学报,21(4):389-395.
钟财丽,钟康惠,冉凤琴.2017.青海五龙沟地区岩金沟金矿床地质特征[J].四川有色金属,(1):32-34+43.
周轶群,胡道功.2012.青海五龙沟金矿区蚀变矿物光谱特征与找矿应用[J].地质力学学报,18(03):331-338.
崔廷军,雷延军,傅星.2012.青海五龙沟金矿田成因模式浅析[J].矿产勘查,3(5):644-648.
韩玉,陈柏林,邓元良,等.2017.青海五龙沟金矿田两期蚀变作用及其找矿意义[J].地质学报,91(3):561-570.
寇林林,罗明非,钟康惠,等.2010.青海五龙沟金矿矿集区Ⅰ号韧性剪切带40Ar/39Ar年龄及地质意义[J].新疆地质,28(3):330-333.
李厚民,沈远超,胡正国,等.2001.青海东昆仑五龙沟金矿床成矿条件及成矿机理[J].地质与勘探,37(1):65-69.
李厚民,钱壮志,胡正国,等.1999.青海省都兰县五龙沟地区金矿化类型[J].青海地质,8(1):36-41.
李厚民,沈远超,胡正国,等.2001.青海五龙沟金矿床矿石、矿物含金性及金的赋存状态[J].矿物学报,21(1):89-94.
李磊,钟康惠,田承胜,等.2010.青海省五龙沟地区红旗沟金矿床地质特征[J].科协论坛(下半月),(01):114-116.
刘世宝,魏占浩,窦光源,等.2016.青海省都兰县五龙沟金矿床矿体富集规律及其预测效果[J].华南地质与矿产,32(01):43-50.
刘增铁,任家琪,杨永征,等.2005.青海金矿[M].北京:地质出版社,187-211.
刘振锋,石灵.2013.青海五龙沟淡水沟-红旗沟金矿床研究[J].地球,(7):88+86.
陆露,张延林,吴珍汉,等.2013.青海省都兰县五龙沟金矿主断裂带断层泥K-Ar定年[J].地质力学学报,19(04):385-391+446.
马福贵,田承盛,马国栋,等.2016.青海五龙沟金矿成矿时代的进一步研究和确定[J].地质与资源,25(05):449-453.
马国栋,贾建团,韩玉,等.2016.青海五龙沟金矿矿床成因及成矿模式探讨[J].西北地质,49(04):172-178.
钱壮志,李厚民,胡正国.1997.青海五龙沟地区金矿控矿构造研究[J].西安地质学院学报,增刊,19(9):27-32.
石金友.1997.青海省都兰县五龙沟金矿成矿地质特征及找矿标志[J].前寒武纪研究进展,20(02):29-36.
王守良,王荆程.2014.青海省都兰县五龙沟金矿区韧性剪切带分析[J].地球,(2):48-49.
王铜,吕古贤.2013.青海东昆仑中段五龙沟金矿构造特征与矿床学研究[J].矿物学报,增刊:970-971.
王铜.2015.青海五龙沟金矿床地质特征与成因研究[D].中国地质大学(北京)硕士学位论文,1-75.
魏占浩,孙凤舟,陈苏龙,等.2015.青海五龙沟金矿集区Ⅺ矿带构造叠加晕特征与深部预测[J].地质找矿论丛,30(04):614-622.
徐新文,段建华,路耀祖,等.2017.鄂拉山幔枝构造成矿与深部矿源[J].矿产与地质,31(2):220-233.
徐新文,路耀祖,段建华.2017.青海白日其利金矿幔枝构造控矿特征及成矿预测[J].现代矿业,33(05):1-8+25.
徐新文,路耀祖,段建华.等.2015.青海中东部鄂拉山幔枝构造特征的初步探讨[J].青海国土经略(06):62-66.
许玉豪,刘建栋,杨波.2013.青海五龙沟金矿矿床地质特征[J].地球,(7):93-94.
袁万明,王世成,王兰芬.2000.东昆仑五龙沟金矿床成矿热历史的裂变径迹热年代学证据[J].地球学报,21(4):389-395.
钟财丽,钟康惠,冉凤琴.2017.青海五龙沟地区岩金沟金矿床地质特征[J].四川有色金属,(1):32-34+43.
周轶群,胡道功.2012.青海五龙沟金矿区蚀变矿物光谱特征与找矿应用[J].地质力学学报,18(03):331-338.
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