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青海省三江源成矿带,是近年来资源评价和矿产勘查的重点,青海省玉树藏族自治州曲麻莱县多索岗日铜矿在该成矿带的西延部分,具有很好的成矿前景,测区1∶5万水系沉积物测量常特征组合为Zn、Pb、Hg、Ag、Cu元素,伴有Sb、As等元素,各异常的含量明显提高。1∶1万土壤测量异常重现性好,并圈定出5个综合异常,以Cu、Ag元素异常为主,伴有Pb、Zn异常。岩样结果元素组合反映Cu、Ag有一定相关性,铜银含量高,Cu最大值达28 200×10-6,平均值2 298.6×10-6,Ag最大值达6.299×10-6,平均值为0.665×10-6,主要在紫红色砂岩、灰白色砂岩中含矿。初步圈定出铜矿体7条,Cu品位0.72%~2.28%,矿体累计厚24m,平均品位0.743%。),根据铜银铅锌多金属成矿带的地质特征,并通过岩石测量、土壤测量及工程验证在测区取得了较好的找矿效果。本文通过对该矿点的地球化学特征叙述,对该区成矿特征进行了初步总结,为该带寻找同类型矿床提供具有参考意义的资料。
The Sanjiangyuan metallogenic belt in Qinghai Province is the focus of resource evaluation and mineral exploration in recent years. The Doxoxangli copper deposit in Qumalai County, Yushu Tibetan Autonomous Prefecture, Qinghai Province, has a good mineralization in the westward extension of the metallogenic belt In the foreground, the usual feature combinations of sediment measurements of 1: 50000 water area are Zn, Pb, Hg, Ag and Cu elements with Sb, As and other elements, and the content of each abnormality obviously increases. 1: 10,000 soil survey showed good reproducibility, and delineated five general anomalies, mainly Cu and Ag anomalies, accompanied by abnormal Pb and Zn. The results show that the elemental combinations of Cu and Ag show some correlations. The copper and silver content is high, the maximum value of Cu is 28 200 × 10-6, the average value is 2 298.6 × 10-6 and the maximum value of Ag is 6.299 × 10-6. The average The value of 0.665 × 10-6, mainly in the purple sandstone, gray sandstone containing ore. Preliminary delineation of copper ore body 7, Cu grade 0.72% ~ 2.28%, the cumulative thickness of 24m ore body, the average grade of 0.743%. ). According to the geological characteristics of the Cu-Ag-Pb-Zn polymetallic metallogenic belt, better prospecting results have been obtained in the survey area by means of rock measurement, soil measurement and engineering verification. Based on the description of the geochemical characteristics of the ore deposit, this paper summarizes the metallogenic characteristics of the ore deposit and provides reference materials for finding the same deposit.