物化探资料在大兴安岭富西里地区找矿中的应用

发布时间：2018-10-17 09:49

【摘要】：富西里地区位于黑龙江省北部大兴安岭新林区境内，处于多宝山—黑河Cu-Mo-Au-Fe-Zn成矿带内。砂金资源丰富，早期探明的有倭勒根河、兴隆沟、富西里等大型砂金矿，已知岩金矿床只有80年代发现的瓦拉里-黑龙沟。研究区属大兴安岭森林沼泽景观区，植被覆盖较厚，岩金找矿一直没有大的突破。本次研究在1:5万富西里地区区域地质矿产调查基础上，优选了库纳森河上游西侧的1:5万水系沉积物HS-15、HS-16号异常，开展了1:2万土壤地球化学测量、1:2万地面高精度磁法测量、1:2万激电中梯测量和激电测深综合找矿工作。通过综合找矿及综合研究，在库纳森河西查证区圈定了2处高磁异常，4处视电阻率异常，5处视极化率异常及7处土壤异常，其中的Au-2、Au-5、Au-6号土壤异常和ρs-3视电阻率、ηs-3号视极化率异常成矿条件较好，为金及多金属找矿靶区。对物化探异常的套合部位进行槽探工程揭露，发现了库纳森山东金银矿点，在土壤Au-6号异常发现1条金银矿体，经刻槽取样分析，金品位为1.17×10-6，银品位为213×10-6；在土壤Au-2号异常高值点发现1条矿化蚀变带，蚀变带内发现1条金矿（化）体，，依据激电测深成果，在112线、120线分别布设钻孔对矿化蚀变带进行深部控制，发现在ZK11201中14.54-15.54m处，金品位达到1.95×10-6；在土壤Au-5号异常处发现1条矿化蚀变带，蚀变带内发现1条金矿（化）体，平均品位为0.26×10-6，最高品位为0.38×10-6。由此说明在森林覆盖区采用大比例尺的物化探综合方法查证水系沉积物异常在岩金或多金属找矿中的可行性，同时说明该区找矿前景较好，值得今后工作中进一步深入研究。
[Abstract]:The Fuxi area is located in the new forest area of Daxinganling in the north of Heilongjiang Province and is located in the Cu-Mo-Au-Fe-Zn metallogenic belt of Dobaoshan-Heihe River. The placer gold resources are abundant, and the early discovered gold deposits include the Wullergen River, Xinglonggou, Fuxili, etc. The known rock gold deposits are only Varari-Hailonggou discovered in the 1980s. The study area belongs to the forest and swamp landscape of Daxing'anling with thick vegetation cover and no great breakthrough in the prospecting of rock gold. On the basis of the investigation of regional geology and mineral resources in the area of 1: 50, 000 Fusili, this study has selected the HS-15,HS-16 anomaly in the western side of the upper reaches of the Cunaldson River. The geochemistry survey of 1: 20 million soil, the high precision magnetic survey of 1: 20 000 ground surface, the 1: 20 000 intermediate ladder survey and the comprehensive prospecting of IP sounding are carried out. Through comprehensive prospecting and comprehensive study, two high magnetic anomalies, four apparent resistivity anomalies, five apparent polarizability anomalies and seven soil anomalies have been delineated in the survey area west of Kunan River. The Au-2,Au-5,Au-6 soil anomaly, 蟻 s-3 apparent resistivity and 畏 s-3 apparent polarizability anomaly have good metallogenic conditions and are the gold and polymetallic prospecting targets. In the case of geophysical and geochemical anomalies, the gold and silver ore points of Shandong Province were discovered, and one gold and silver ore body was found in the soil Au-6 anomaly. The gold grade was 1.17 脳 10 ~ (-6) and the silver grade was 213 脳 10 ~ (-6). A mineralization alteration zone was found at the high value point of soil Au-2 anomaly, and a gold ore (mineralization) body was found in the alteration zone. According to the results of IP sounding, the deep control of the mineralization alteration zone was carried out in 112-line and 120-line respectively, and it was found at 14.54-15.54m in ZK11201. The gold grade is 1.95 脳 10 ~ (-6), and one mineralization alteration zone is found in the soil Au-5 anomaly, and one gold (mineralization) body is found in the alteration zone. The average grade is 0.26 脳 10 ~ (-6) and the highest grade is 0.38 脳 10 ~ (-6). It is shown that it is feasible to use large scale geophysical and geochemical prospecting method in the forest cover area to verify the feasibility of water system sediment anomaly in the prospecting of rock gold or polymetallic deposits. At the same time, the prospect of prospecting in this area is good, which is worthy of further study in the future work.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631;P632

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