西藏朱诺斑岩铜矿床发现的重大意义及启示

The discovery of the Zhunuo porphyry copper deposit in Tibet and its significance

朱诺斑岩铜矿床位于冈底斯火山岩浆弧之中西部,它是在原区域化探成果中无任何有编号异常的情况下,通过对原始化探数据进行重新处理时发现的,是迄今为止品位最富的大型斑岩铜矿床。它的发现“使冈底斯斑岩铜矿带的勘查区域向西延伸了数百km,有望发展成为巨型斑岩铜矿带”,自此揭开了在冈底斯西部寻找斑岩铜矿的序幕。该成果入选2004年全国地质调查工作重大新闻第二名(地质成果第一名),这是创新思维与科学找矿的范例。文章在较系统介绍了该矿床的成矿背景、矿化特征、发现过程及勘查新进展的同时,客观展示了笔者运用新的找矿思路对原有化探数据进行二次开发、赋予各种信息以客观的地质内涵、进行异常筛选及成矿预测研究的全过程;特别是在找矿难度越来越大的今天,对于启迪人们的找矿思路及降低勘查风险、快速缩小找矿靶区等方面具有非常重大的理论及现实意义。

The Zhunuo porphyry copper deposit, situated ma arc, is the richest porphyry copper deposit yet found cessing primitive regional geochemical data that had no in the mid-western part of the Gangdise volcano-magwithin the arc. This deposit was discovered by reproindication of abnormality. Its discovery extends the prospecting region of the Gangdise porphyry copper belt several hundred kilometers westward, and illustrates the belt potential for being a major zone of porphyry copper mineralization. The discovery of the Zhunuo deposit was selected as the second most important finding for the China Geological Survey in 2004. This paper introduces the mettallogenic background and mineralization characteristics of the Zhunuo deposit, and describes in detail both the discovery process and new developments in prospecting. Other topics include reprocessing of the primitive geochemical survey data, anomaly filtrating, and ore-forming prediction. This discovery is of great significance both in theory and in practice for enlightening people on approaches to ore-finding, for reducing exploration risk, and for quickly shrinking ore target areas for detailed prospecting.