| 青海果洛龙洼金矿床矿化元素组合特征及找矿意义 |
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| 引用本文： | 贾福聚,高建国,周家喜,郭跃进.青海果洛龙洼金矿床矿化元素组合特征及找矿意义[J].地质找矿论丛,2017,32(3):360-366. |
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| 作者姓名： | 贾福聚 高建国 周家喜 郭跃进 |
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| 作者单位： | 1. 昆明理工大学国土资源工程学院,昆明,650093;2. 中国科学院地球化学研究所,贵阳,550002;3. 云南华联矿产勘探有限责任公司,云南曲靖,655000 |
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| 摘 要： | 青海果洛龙洼金矿床位于东昆仑造山带东段沟里地区,具有多元素共生特征,这些共生元素不仅具有综合利用价值,也是重要的找矿指示元素。文章依据工作中系统采集的81件样品的11种元素(Au、Hg、V、Mo、Ni、Cu、As、Co、Ag、W、Pb)测试数据,进行了元素的相关分析、聚类分析和因子分析,并分块段将各因子得分与矿体Au品位进行了对比研究,结合矿区地质情况进行了解译。结果表明,主成矿元素Au与Ag、Pb、Cu、Mo显著正相关,与Hg、W、As弱正相关。伴生元素中As与Hg、Pb与Ag为强正相关,Pb与Cu、Cu与Ag、W与Mo为正相关,Ni、Co与V元素呈弱正相关。因子分析结果显示,11种元素可分为四个因子组Au-Cu-Ag-Pb(F1)、W-Mo(F2)、Hg-As(F3)和Ni-Co-V(F4)。F1因子为中温多金属硫化物元素组合,在矿床主成矿阶段形成,该因子得分情况在矿区西部区域与矿体Au品位变化规律完全一致,因此,Au-Cu-Ag-Pb组合异常对矿区西部区域找矿具有指示意义。F2因子属高温岩浆热液元素组合,该因子上Au有一定载荷,推测矿区华力西-印支期花岗闪长岩对Au成矿具有重要意义。F3为低温热液元素组合,矿区自西往东分段统计结果显示,该因子得分变化情况与矿体Au品位变化规律具一致性,可运用As-Hg组合异常进行成矿预测。F4因子与地层中的基性火山组分有关,与其它元素具有不同的地球化学演化过程。因子得分统计结果显示,矿区中部是与Au相关多元素富集中心,该区段为多种成矿因素复合叠加的中心,应加强该处的勘查工作。
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| 关 键 词： | 果洛龙洼金矿床 地质统计学 矿化元素 元素组合特征 找矿方向 青海省 |
| 收稿时间： | 2016/4/28 0:00:00 |
Characterisitics of ore elements association and the prospecting significance in Guoluolongwa gold deposit, Qinghai province |
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| JIA Fuju,GAO Jianguo,ZHOU Jiaxi and GUO Yuejin.Characterisitics of ore elements association and the prospecting significance in Guoluolongwa gold deposit, Qinghai province[J].Contributions to Geology and Mineral Resources Research,2017,32(3):360-366. |
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| Authors: | JIA Fuju GAO Jianguo ZHOU Jiaxi and GUO Yuejin |
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| Institution: | Department of Earth Sciences, Kunming University of Science and Technology, Kunming 650093, China,Department of Earth Sciences, Kunming University of Science and Technology, Kunming 650093, China,Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China and Yunnan Hualian Mine Exploration Company, Yunnan, Qujing 655000, China |
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| Abstract: | Guoluolongwa gold deposit is located at Gouli area in Eastern Kunlun orogenic belt,Qinghai province and is characterized by symbiosis of multi-elements.The associated elements are not only valuable for comprehensive utilization but also the important prospecting indicators.81 samples were collected and 11 elements (Au,Hg,V,Mo,Ni,Cu,As,Co,Ag,W and Pb)were analyzed.The correlation analysis,cluster analysis and factor analysis were carried out on the results.The sampling area is divided into blocks.Factor scores of each block are comparatively studied with Au grade distribution of ore bodies and relation between the elements are interpreted based on the local geology.Au is strongly correlated with Ag,Pb,Cu,Mo,and weakly with Hg,W,As.Among the elements As and Hg,Pb and Ag is strongly correlated,Pb and Cu,Cu and Ag,W and Mo positively correlated,Ni、Co weakly with V.Factor analy-sis results show that 11 elements can be divided into four associations,Au-Cu-Ag-Pb(F1),W-Mo (F2),Hg-As (F3) and Ni-Co-V(F4).Factor F1 is a association of mesothermal metal sulfides representing the main mineralization stage.variation of the factor score in the western of the mining area is consistent with the change of the Au grade of the ore body thus the association Au-Cu-Ag-Pb anomaly in the western region of the mining area could be indicator for Au prospecting of the region.F2 represents high temperature magmatic hydrothermal metal element association with a few factor loads of Au indicating that Variscan-Indosinian granitic diorite is of significance to the ore-forming process.F3 represens low temperature metal association with the factor score range in consistent with the change of the Au grade of the ore body in the mining area and As-Hg association anomaly can be used to ore prediction.F4 group represents mafic volcanic rocks in the strata and its element association differs from other element association in geochemical evolution.Factor score statistics shows that the central region of the mining area is the enrichment center of multi elements correlated with Au and multiple metallogenic factors overprinted here thus the exploration work should be strengthened. |
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| Keywords: | guoluolongwa gold deposit geological statistics ore element characteristics of element association prospecting direction Qinghai province |
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