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金属矿山 ›› 2019, Vol. 48 ›› Issue (03): 147-155.

• 地质与测量 • 上一篇    下一篇

藏南邦卓玛地区金多金属矿土壤地球化学特征及找矿前景

袁和1,2,许云鹏1,邵华1,黄昊1,王磊1,罗先熔2   

  1. 1. 辽宁省第四地质大队有限责任公司,辽宁 阜新 123000;2. 桂林理工大学地球科学学院,广西 桂林 541004
  • 出版日期:2019-03-25 发布日期:2019-04-30
  • 基金资助:

    * “十三五”国家重点研发计划项目(编号:2016YFC0600603-3)。

Soil Geochemical Characteristics and Prospecting Potential of Au-polymetallic Deposit in Bangzhuoma Area,South Tibet

Yuan He1,2,Xu Yunpeng1,Shao Hua1,Huang Hao1,Wang Lei1,Luo Xianrong2   

  1. 1. Liaoning Fourth Geological Team Co.,Ltd.,Fuxin 123000,China;2. College of Earth Sciences,Guilin University of Technology,Guilin 541004,China
  • Online:2019-03-25 Published:2019-04-30

摘要: 藏南邦卓玛地区地处特提斯喜马拉雅中东部,位于藏南江孜—隆子金锑多金属成矿带上,该区域成矿潜力巨大,是寻找金锑多金属矿的有利地区。为在邦卓玛地区实现找矿突破,在该区开展了地质找矿工作,以1∶10 000土壤地球化学测量数据为基础,采用元素变异系数、Cv1和Cv1 /Cv2变异系数解释图与分形理论相结合的方法,对Au、Pb、W、Sb、Cu、Zn、Mo、Ba、Sn 9种元素进行了分析,揭示了各元素在空间上的富集分布规律及其成矿潜力。在此基础上,结合区内成矿地质条件和元素异常特征对该区进行了成矿预测。研究表明:①Cu、Zn、Mo、Ba、Sn成矿潜力较小,Au、Pb、W、Sb成矿潜力较大,运用分形理论得出了各元素的异常下限,其中Au为7.24×10-9,Pb为53.83×10-6,W为6.12×10-6,Sb为4.14×10-6;②根据多元素套合关系在区内圈定了3处找矿靶区,其中1#靶区内主攻矿种Au的异常强度为36.4×10-9,2#、3#靶区内Au的异常强度分别为49.8×10-9、47.3×10-9;③经过对1#靶区进行探槽工程验证,发现了1条长150 m、厚0.30 m的含金石英脉,Au品位为(3.64~4.78)×10-6;2#、3#靶区内Au的异常强度均高于1#靶区Au的异常强度,表明邦卓玛地区具有较好的找矿前景。

关键词: 金多金属矿, 土壤地球化学特征, 分形理论, 找矿前景

Abstract: Bangzhuoma area in Southern Tibet is located in the east-central part of Tethys Himalayas and situated in the Jiangzi-Longzi gold-antimony polymetallic metallogenic belt in Southern Tibet.Bangzhuoma area in Southern Tibet has great metallogenic potential and it is a favorable area for the exploration of gold-antimony polymetallic deposits.In order to achieve prospecting breakthrough in the area,some relative geological prospecting work is conducted,based on 1∶10 000 soil geochemical measurement data of the area,the integration method of element variation coefficient,variation coefficient interpretation diagram of Cv1 and Cv1 /Cv2,and fractal theory is adopted to analyze the nine elements of Au,Pb,W,Sb,Cu,Zn,Mo,Ba and Sn,the spatial enrichment distribution regularity and metallogenic potential of them are revealed.Based on the above discussion results,metallogenic prediction work is done based on metallogenic geological condition and element anomaly characteristics.The study results show that:①metallogenic potential of Cu,Zn,Mo,Ba and Sn is less than that of Au,Pb,W and Sb,and the abnormal lower limit values of the elements are obtained with value of Au 7.24×10-9,value of Pb 53.83×10-6,value of W 6.12×10-6,value of Sb 4.14×10-6;②according to element correlation relationship,three prospecting target areas in the Bangzhuoma area are delineated,Au is the main mineral in 1# prospecting target area,and its abnormal strength is 36.4×10-9,abnormal strength of Au in 2# and 3# prospecting target area are 49.8×10-9 and 47.3×10-9;③through trench engineering verification of 1# prospecting target area,a gold-bearing quartz vein with length of 150 m and thickness of 0.30 m is found,with Au grade of (3.64~4.78)×10-6;Au abnormal strength in 2# and 3# prospecting target area are both higher than that of 1# prospecting target area,which further show that prospecting potential in Bangzhuoma area is good.

Key words: Au-polymetallic deposit, Soil geochemical characteristics, Fractal theory, Prospecting potential