| 广西高龙金矿鸡公岩矿段地质特征和构造地球化学找矿 |
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| 引用本文： | 陈宏毅,钱建平,刘青.广西高龙金矿鸡公岩矿段地质特征和构造地球化学找矿[J].地质科技情报,2012,31(3):89-97. |
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| 作者姓名： | 陈宏毅 钱建平 刘青 |
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| 作者单位： | 桂林理工大学地球科学学院,广西桂林,541004 |
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| 基金项目： | 广西隐伏金属矿产勘查重点实验室基金，中国科学院地球化学研究所矿床地球化学国家重点实验室开放基金，广西黄金局地质找矿项目 |
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| 摘 要： | 对矿区地表至960m中段共计6个中段平面系统采集构造地球化学样品,共采集地层和构造蚀变岩样品184件,测试了Au、Ag、As、Sb、Cu、Pb、Zn、Sn、Mo、Mn、Co、Ni、Cr、V、Ti 15种微量元素的含量,编制了各元素地球化学纵剖面图和单个矿脉元素含量曲线图,综合地球化学图件分析法和格里戈良分带指数法确定了元素的纵向、横向和轴向分带序列,建立了原生晕地球化学三维分带模式。综合地质地球化学资料分析得到:硅化砂泥岩、构造蚀变岩中Au、As、Sb、Ag元素含量高,是地壳的数倍到数百倍,变异系数大,表明这些元素卷入了成矿作用,硅化泥岩是主要的富矿围岩,而矿体大部分赋存于由于成矿热液多期次强烈活动而形成的石英岩和构造角砾岩中。矿区原生晕轴向分带序列为:As、Pb、Mo、Sn、Cu、Au、Ag、Mn、Zn、Sb。与矿体北西向侧伏规律一致,矿区地球化学异常体亦具向北西侧伏的趋势。根据元素地球化学纵剖面图中主成矿元素异常高值带向下延伸未封闭,矿体向下未尖灭、特征前缘晕元素Sb和成矿晕元素Zn出现在矿尾晕等特征说明,矿体向下仍有一定的延伸,已知矿体北西侧深部是下一步找矿勘探的重点区域。
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| 关 键 词： | 金矿 构造地球化学 原生晕地球化学分带 高龙 广西 |
Geological Characteristics and Tectonic Geochemical Exploration in Jigongyan Ore Section of Gaolong Gold Mining,Guangxi |
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| CHEN Hong-yi
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QIAN Jian-ping
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LIU Qin.Geological Characteristics and Tectonic Geochemical Exploration in Jigongyan Ore Section of Gaolong Gold Mining,Guangxi[J].Geological Science and Technology Information,2012,31(3):89-97. |
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| Authors: | CHEN Hong-yi QIAN Jian-ping LIU Qin |
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| Institution: | CHEN Hong-yi,QIAN Jian-ping,LIU Qin(College of Earth Science,Guilin University of Technology,Guilin Guangxi 541004,China) |
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| Abstract: | The concentrations of 15 trace elements(Au,Ag,As,Sb,Cu,Pb,Zn,Sn,Mo,Mn,Co,Ni,Cr,V,Ti) were determined from 184 samples collected from the surface and five sections of underground mine in Gaolong mining area,ranging from strata to tectonic rocks.Element geochemical profile and profile of content of elements of mining vein of all 15 elements were compiled.A three-dimensional zoning pattern of primary halo was established based on analysis of geochemical profiles and Gregorian’s zoning index calculation method.The longitudinal,transverse,and vertical zoning sequence of elements were determined.Geological and geochemical data show that the concentrations of metallogenic elements,i.e.Au,As,Sb,and Ag are high and from several times to hundredfold more in the silicified clastic and tectonic rocks than crust of the earth.So those elements were involved in the mineralization.The mudstone is the main re-hosting rock.The orebodies is located in tectonic quartzites and tectonic breccias.The longitudinal zoning sequence of primary halo in mining area is As,Pb,Mo,Sn,Cu,Au,Ag,Mn,Zn,and Sb.Geochemical profiles of ore veins show high value zones inclining northwestward,which is consistent with the lateral trending of orebodies.The high value zones of main ore-forming elements were not closed downward extension.The orebodies were not thinned out downward and the typical front halo element of Sb and metallogenic halo element of Zn are in the rear halo.These characteristics show that the orebodies had some extension downward.The northwest of depth of the known orebodies is the key region of next exploration. |
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| Keywords: | gold mine tectonic geochemistry geochemical zoning of primary halo Gaolong Guangxi |
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