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。
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.
作者
袁和
许云鹏
邵华
黄昊
王磊
罗先熔
Yuan He;Xu Yunpeng;Shao Hua;Huang Hao;Wang Lei;Luo Xianrong(Liaoning Fourth Geological Team Co.,Ltd.,Fuxin 123000,China;College of Earth Sciences,Guilin University of Technology,Guilin 541004,China)
出处
《金属矿山》
CAS
北大核心
2019年第3期147-155,共9页
Metal Mine
基金
"十三五"国家重点研发计划项目(编号:2016YFC0600603-3)
关键词
金多金属矿
土壤地球化学特征
分形理论
找矿前景
Au-polymetallic deposit
Soil geochemical characteristics
Fractal theory
Prospecting potential
