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| 黔东八克金矿毒砂标型特征研究 | |
| 引用本文： | 郑杰,余大龙,吴文明,杨忠琴,刘阳.黔东八克金矿毒砂标型特征研究[J].现代地质,2011,25(4):750-758. |
| 作者姓名： | 郑杰 余大龙 吴文明 杨忠琴 刘阳 |
| 作者单位： | 1. 中国冶金地质总局矿产资源研究院,北京,100025 2. 贵州大学资源与环境工程学院,贵州贵阳,550003 3. 贵州省地质矿产勘查开发局105地质队,贵州贵阳,550018 4. 贵州省地质调查院,贵州贵阳,550000 |
| 摘 要： | 黔东八克金矿床以金高度富集矿体和围岩中广泛出现毒砂而与该区其他金矿有明显区别。以成因矿物学和找矿矿物学的理论和方法为指导,在前人对该矿床的地质背景、成矿条件、矿床地球化学等方面进行分析的基础上,利用现代测试技术和手段对该矿区中产出的毒砂进行了标型特征研究,从另一个角度取得了矿床成因方面的重要信息。研究表明,矿体含金毒砂粒度小,结晶程度差,晶胞参数接近理论值,热电性为N导型且热电系数均值为-195.6μV/℃,明显低于毒砂热电系数均值在近矿围岩中的-185.1μV/℃和在远矿围岩中的-174.6μV/℃。化学成分中S/As大于1,Fe/(As+S)小于0.5。电子探针形貌观察发现其颗粒较为破碎,裂隙发育,并有伴生矿物方铅矿填充。稀土元素和微量元素研究结果表明,矿体内毒砂REE含量明显低于围岩中毒砂的REE含量,铕呈现强烈的负异常。成矿流体中富集亲硫元素和LREE,亏损HFSE,为具有弱还原性的富C l型体系。通过对Y/Ho、Zr/H f、Nb/Ta和Co/N i比值的研究,推断八克金矿是一种岩浆热液型的中温矿床。 |
| 关 键 词： | 毒砂 标型特征 八克金矿 微量元素 稀土元素 黔东 |
Typomorphic Characteristics of Arsenopyrite in the Bake Gold Deposit,Eastern Guizhou Province |
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| ZHENG Jie,YU Da-long,WU Wen-ming,YANG Zhong-qin,LIU Yang.Typomorphic Characteristics of Arsenopyrite in the Bake Gold Deposit,Eastern Guizhou Province[J].Geoscience——Journal of Graduate School,China University of Geosciences,2011,25(4):750-758. | |
| Authors: | ZHENG Jie YU Da-long WU Wen-ming YANG Zhong-qin LIU Yang |
| Institution: | ZHENG Jie1,YU Da-long2,WU Wen-ming3,YANG Zhong-qin4,LIU Yang1(1.Institute of Mineral Resources Research,China Metallurgical Geology Bureau,Beijing 100025,China,2.College of Resources and Environment Engineering,Guizhou University,Guiyang,Guizhou 550003,3.Geological Party 105,Guizhou Bureau of Geology and Mineral Exploration & Development,Guizhou 550018,4.Guizhou Academy of Geologic Survey,Guizhou 550000,China) |
| Abstract: | The Bake gold deposit is characterized by high richness in gold in ore body and widely distributed arsenopyrite in surrounding rocks,which make a clear distinction with other gold deposits of this area.Based on the analysis of the geological background,regional geological conditions of mineralization,ore-forming mechanism,by applying theories and methods of minerageny and prospecting mineralogy,using the modern testing technology,the typomorphic characteristics of arsenpyrite in the Bake gold deposit were s... |
| Keywords: | arsenopyrite typomorphic characteristics Bake gold deposit trace element REE Eastern Guizhou Province |
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