湘东北地区金矿成矿规律及找矿方向探讨
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摘要
湘东北地区位于江南造山带中段,是雪峰-九岭巨型弧形金成矿带的重要组成部分。本文在综合前人研究成果的基础上,结合本单位多年来在本地区的勘查工作,认为本地区蓟县系坪原组为金的矿源层;近东西向的韧性剪切带为成矿前构造,北东向长平深大断裂为导矿构造,北西(西)、近东西向断裂为容矿构造;北东向次级构造为成矿后构造;燕山期岩浆岩为湘东北金矿的成矿作用提供了部分成矿流体和成矿物质,并提供了能量;本区金矿体向深部延伸稳定,据此,本文认为万古金矿床和黄金洞金矿床的深部具有较好的找矿前景。
Northeastern Hunan Province, which is recognized as an important part of the huge arc Xuefeng-Jiuling Au metallogenic belt, is located in the middle segment of the Jiangnan Orogenic Belt.Based on a comprehensive study of the previous work and prospecting in this area over the past years,the Pingyuan Formation of the Jixian System is interpreted as the source bed for gold. The E-trending ductile shear zones are interpreted as pre-ore structures, while the NE-trending Changping Fault is interpreted as passable structure and NW-to WNW-and nearly E-trending structures as host structures.The secondary NE-trending structures are recognized as post-ore structures. Yanshanian granites might have provided part of the ore-forming elements and ore fluids during the ore-forming process, as well as energy. Au orebodies extend stably to the deep crust, showing good prospecting potential for the Dawan and Huangjindong gold deposits.
Northeastern Hunan Province, which is recognized as an important part of the huge arc Xuefeng-Jiuling Au metallogenic belt, is located in the middle segment of the Jiangnan Orogenic Belt.Based on a comprehensive study of the previous work and prospecting in this area over the past years,the Pingyuan Formation of the Jixian System is interpreted as the source bed for gold. The E-trending ductile shear zones are interpreted as pre-ore structures, while the NE-trending Changping Fault is interpreted as passable structure and NW-to WNW-and nearly E-trending structures as host structures.The secondary NE-trending structures are recognized as post-ore structures. Yanshanian granites might have provided part of the ore-forming elements and ore fluids during the ore-forming process, as well as energy. Au orebodies extend stably to the deep crust, showing good prospecting potential for the Dawan and Huangjindong gold deposits.
引文
[1]邓会娟,夏浩东,息朝庄,崔银亮.2013.湖南平江童源-和尚坡金矿区成矿流体地球化学特征[J].矿物学报,33(5):691-697.
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[3]韩凤彬,常亮,蔡明海.2010.湘东北地区金矿成矿时代研究[J].矿床地质,29:563-571.
[4]贺转利.2009.江南造山带湖南段金多金属成矿动力学特征及成矿模式[D].中国科学院研究生院(广州地球化学研究所).
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[6]李杰,陈必河,安江华,谭仕敏,张孝国,姚宇军.2011.湖南黄金洞金矿成矿流体包裹体特征[J].华南地质与矿产,27(2):163-168.
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[10]罗献林,易诗军,梁金城.1984.论湘西沃溪金锑矿床的成因[J].地质与勘探,20(3):1-10.
[11]罗献林.1988.论湖南黄金洞金矿床的成因及成矿模式[J].桂林冶金地质学院学报,(8).
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[14]马东升,刘英俊.1991.江南金成矿带层控金矿的地球化学特征和成因研究[J].中国科学:B辑.424-433.
[15]毛景文,李红艳.1997.江南古陆某些金矿床成因讨论[J].地球化学.71-81.
[16]许德如,董国军,邓腾,宁钧陶,王智琳,邹凤辉.2015.湘东北地区大规模金成矿作用及地球动力学背景[J].矿物学报.
[17]叶传庆,戴文剑,刘荫椿,韩秀军.1988.试论黄金洞金矿床成因及找矿意议[J].黄金地质科技,02:24-36.
[18]张乾,曹裕波,张宝贵,潘家永.1992.湖南黄金洞金矿床的稀土与微量元素地球化学--矿石成因证据[J].地质与勘探,28(11):12-17.
[19]Deng T,Xu DR,Chi GX,Wang ZL,Jiao QQ,Ning JT,Dong GJ,Zou FH.2017.Geology,geochronology,geochemistry and ore genesis of the Wangu gold deposit in northeastern Hunan Province,Jiangnan Orogen,South China.Ore Geology Review,88:619-637.
[20]Mao JW,Kerrich R,Li HY,Li YH.2002.High 3He/4He ratios in the Wangu gold depoit,Hunan province,China:implications for mantle fluids along the Tanlu deep fault zone.Geochem.J.36,197-208.
[21]Xu DR,Deng T,Chi GX,Wang ZL,Zou FH,Zhang JL,Zou SH.2017.Gold mineralization in the Jiangnan Orogenic Belt of South China:Geological,geochemical and geochronological characteristics,ore deposit-type and geodynamic setting.Ore Geology Review,88:565-618.
[2]董国军,许德如,王力,陈广浩,贺转利,符巩固,吴俊,王智琳.2008.湘东地区金矿床矿化年龄的测定及含矿流体来源的示踪---兼论矿床成因类型[J].大地构造与成矿,32(4):597-611.
[3]韩凤彬,常亮,蔡明海.2010.湘东北地区金矿成矿时代研究[J].矿床地质,29:563-571.
[4]贺转利.2009.江南造山带湖南段金多金属成矿动力学特征及成矿模式[D].中国科学院研究生院(广州地球化学研究所).
[5]胡瑞英,程景平,郭士伦,郝秀红.1995.裂变径迹法在金矿研究中的应用[J].地球化学,24(2):188-192.
[6]李杰,陈必河,安江华,谭仕敏,张孝国,姚宇军.2011.湖南黄金洞金矿成矿流体包裹体特征[J].华南地质与矿产,27(2):163-168.
[7]刘亮明,彭省临,吴延之.1999.湘东北地区脉型金矿床的活化转移[J].中南工业大学学报(自然科学版),(1):4-7.
[8]刘荫椿.1989.黄金洞金矿床地球化学特征[J].地质与勘探,(11).
[9]刘英俊,季峻峰.1994.低温含金辉锑矿的某些特征[J].矿物学报,14(1):68-73.
[10]罗献林,易诗军,梁金城.1984.论湘西沃溪金锑矿床的成因[J].地质与勘探,20(3):1-10.
[11]罗献林.1988.论湖南黄金洞金矿床的成因及成矿模式[J].桂林冶金地质学院学报,(8).
[12]罗献林.1990.论湖南前寒武系金矿床的成矿物质来源[J].桂林冶金地质学院学报,(1).
[13]罗献林.1989.论湖南前寒武系金矿床的形成时代[J].桂林冶金地质学院学报,9(1):25-34.
[14]马东升,刘英俊.1991.江南金成矿带层控金矿的地球化学特征和成因研究[J].中国科学:B辑.424-433.
[15]毛景文,李红艳.1997.江南古陆某些金矿床成因讨论[J].地球化学.71-81.
[16]许德如,董国军,邓腾,宁钧陶,王智琳,邹凤辉.2015.湘东北地区大规模金成矿作用及地球动力学背景[J].矿物学报.
[17]叶传庆,戴文剑,刘荫椿,韩秀军.1988.试论黄金洞金矿床成因及找矿意议[J].黄金地质科技,02:24-36.
[18]张乾,曹裕波,张宝贵,潘家永.1992.湖南黄金洞金矿床的稀土与微量元素地球化学--矿石成因证据[J].地质与勘探,28(11):12-17.
[19]Deng T,Xu DR,Chi GX,Wang ZL,Jiao QQ,Ning JT,Dong GJ,Zou FH.2017.Geology,geochronology,geochemistry and ore genesis of the Wangu gold deposit in northeastern Hunan Province,Jiangnan Orogen,South China.Ore Geology Review,88:619-637.
[20]Mao JW,Kerrich R,Li HY,Li YH.2002.High 3He/4He ratios in the Wangu gold depoit,Hunan province,China:implications for mantle fluids along the Tanlu deep fault zone.Geochem.J.36,197-208.
[21]Xu DR,Deng T,Chi GX,Wang ZL,Zou FH,Zhang JL,Zou SH.2017.Gold mineralization in the Jiangnan Orogenic Belt of South China:Geological,geochemical and geochronological characteristics,ore deposit-type and geodynamic setting.Ore Geology Review,88:565-618.