西藏地堡那木岗金铜矿区土壤地球化学特征及找矿预测

发布时间：2018-05-07 11:45

  本文选题：金铜矿 + 土壤地球化学　； 参考：《成都理工大学》2017年硕士论文

【摘要】：地堡那木岗金铜矿区位于西藏阿里改则县多龙铜多金属矿集区的西段,目前该矿区尚处于普查阶段。本文采用勘查地球化学的理论和方法及规范要求,对矿区进行了1:2.5万的土壤地球化学测量和系统采样。分别采用ES、ICP-OES、AFS、GFAAS及POL方法检测了样品的10种元素组成:Ag、Mo、As、Pb、Cu、Zn、Bi、Sb、Au、W。在获得样品数据的基础上,通过数据处理,计算了样品的浓度克拉克值、变异系数、偏度等参数,分析了元素的富集、离散和正态分布趋势,并编制了元素地球化学图。利用因子分析和聚类分析方法研究了元素的共生组合特征,从中提取三个主因子:(1)F01:Cu、Pb、Zn、As、Sb、Ag、Au;(2)F02:Pb、Mo、Bi;(3)F03:W、Bi、Ag,以及划分出5个元素共生组合:(1)Cu、Zn、Sb元素组;(2)Au、Mo、Pb元素组;(3)W、Bi元素组;(4)Ag元素;(5)As元素。在对比了传统迭代法之后,采用盒须图法求取异常下限,并结合地质成矿背景和区域地球化学特征,拟定出适合本区的元素背景值和异常下限。根据选定的异常下限,编制单元素异常图。在分析研究异常特征基础上,圈出6处以Cu、Au为主的综合异常。其中,HS-1乙2、HS-2乙2、HS-6乙2具有较大的找矿潜力。综合测区的地质地球化学条件,在圈定综合异常的基础上,从中筛选出最有希望的Ⅱ-1和Ⅱ-2两个找矿靶区:Ⅱ-1靶区以寻找铜矿和热液蚀变岩型金矿为主,靶区内部发育有两组构造破碎带,成矿地质条件优越,建议布置岩石地球化学剖面控制异常,以进一步缩小靶区范围;Ⅱ-2靶区以找寻斑岩型铜矿为主,物化探异常在此处吻合度极高,建议先实施槽探工程进行控制,再根据见矿情况实施钻探工程,揭露深部矿化情况。
[Abstract]:Dibao Namugang gold and copper mine is located in the west section of the Dulong copper polymetallic ore concentration area in Ali Ze County, Tibet. At present, the mining area is still in a general survey stage. Based on the theory, method and specification of exploration geochemistry, a soil geochemical survey of 1: 25 000 and systematic sampling has been carried out in this paper. The composition of 10 elements in the sample was determined by ESP-OESMA-AFSFAAS and POL, respectively. On the basis of the sample data, the concentration Clark value, coefficient of variation and deviation of the sample were calculated through data processing. The enrichment, dispersion and normal distribution of the elements were analyzed, and the geochemical map of the elements was compiled. The symbiotic assemblage characteristics of elements were studied by factor analysis and cluster analysis. Three main factors were extracted from the symbiotic assemblage of elements: 1 ~ (1) F ~ (01) ~ (1): CuPb ~ (1) Cu ~ (2 +) Zn ~ (1) B ~ (1) Zn ~ (2 +) B ~ (2 +) ~ (2) B _ (2) B _ (2) B _ (2) B _ (2) B _ (2) B _ (2) B ~ (2) ~ (+) ~ (3) ~ (3) ~ (3) ~ (3) ~ (5) ~ (+) ~ (1) ~ (1) Cu ~ (+) B ~ (+) ~ (3) ~ (3) ~ (3) ~ (5) ~ (-) -@@ After comparing the traditional iterative method, the lower limit of anomaly is obtained by using the box diagram method, and the element background value and anomaly lower limit suitable for this area are worked out by combining the geological metallogenic background and the regional geochemical characteristics. According to the selected exception lower limit, a single element anomaly map is compiled. On the basis of analyzing and studying the anomalous characteristics, 6 Synthetical anomalies, which are dominated by Cu-au, are set up. Among them, HS-1 and HS-2 / HS-2 / HS-6 / B2 have great prospecting potential. On the basis of delineating the comprehensive anomalies, the two most promising prospecting targets, 鈪，

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