藏南柯月铅锌多金属矿床Ⅱ号矿化体原生晕特征

Characteristics of Primary Halo in No Ⅱ Orebody of the Keyue Lead-Zinc Polymetallic Deposit in Southern Tibet

摘要:

国内外大量的原生晕理论研究及应用表明，原生晕测量是地球化学中一种有效的研究地球化学特征、寻找金属矿床、追踪隐伏矿体的方法。柯月铅锌矿床Ⅱ号矿化体已完成钻探及槽探施工，在此基础上研究其元素原生晕轴向分带特征，并与扎西康铅锌锑银多金属矿床原生晕特征对比，可为柯月Ⅱ号矿化体深部成矿预测提供依据。通过采取柯月Ⅱ号矿化体8号勘探线ZK0801，ZK0802，ZK0803，ZK0804号共4个钻孔及TC0801号探槽的岩石样品；选取Pb,Zn,Sb,Ag,W,Bi,As,Mo,Cu,In,Cd,Au,Mn共13种元素作为分析元素；对Ⅱ号矿化体进行原生晕研究。研究结果表明，成矿异常及原生晕主要集中于海拔4660m左右，成矿过程中可能经历了有限的叠加作用，认为Ⅱ号矿化体深部可能存在隐伏矿体。

Abstract:

As showed by a large number of primary halo theory and its application, primary halo measurement is an effective method to study geochemical characteristics, find the metal deposits and track the concealed orebodies. Drilling and trenching work has been carried out in No.2 orebody of Keyue lead-zinc deposit. On these basis, the vertical zoning characteristics of the primary halos about geochemical elements have been studied, and compared with the primary halo characteristics of Zhaxikang lead-zinc antimony silver polymetallic deposit. It will provide evidences for predicting deep ore bodies of Keyue No.2 mineralization body. In this paper, by using the sock samples from four drill holes of ZK0801，ZK0802，ZK08 03 and ZK0804，and rock samples of TC0801, choosing 13 kinds of metallogenic elements, such as Pb,Zn,Sb,Ag,W,Bi,As,Mo,Cu,In,Cd,Au,Mn as the analysis elements, primary halo study of No.Ⅱ orebody has been carried out. It is showed that the elements anomalies and primary halo mainly concentrate above the altidude of 4660m, and the mineralization may have experienced limited additive effects. It is believed that hidden orebody may exist in the deep part of No Ⅱorebody.