滇西金厂河金铜多金属矿集区成矿模式与综合找矿模型

金厂河金铜多金属矿集区是滇西保山-镇康多金属成矿带的重要组成部分。通过地质、物探、化探综合调查与典型矿床对比,系统总结了矿集区内成矿关键控矿因素及矿床类型,在此基础上初步建立矿集区成矿模式及综合找矿模型。研究表明,矿集区成矿受"地层+构造"双重控制明显,分为矽卡岩型、中低温热液(脉)型、热液-矽卡岩复合型三种矿床类型。地物化综合找矿信息是寻找矿集区金铜多金属矿的有效标志,依据不同矿床类型的最佳找矿方法组合建立了在成因与空间上有一定联系的"金厂河"式、"打厂凹-核桃坪"式、"黑牛凹"式、"黑岩凹"式、"黄家地"式、"山乡"式六种找矿模式,并优选打厂凹-核桃坪、陡崖矿区深部作为寻找"金厂河"式矿床的有利靶区。目前已在打厂凹矿区深部新发现"金厂河"式隐伏矿床,这对该区下步的找矿工作具有重要的指导意义。

Metallogenic models and prospecting criteria for the Jinchanghe Au-Cu polymetallic ore-concentration area in western Yunnan

The Jinchanghe gold-copper polymetallic ore-concentration area is an important part of the Baoshan-Zhengkang polymetallic metallogenic belt in western Yunnan. Through a comprehensive survey of geology, geophysics and geochemistry and comparison with typical deposits, this paper summarizes the critical ore-controlling factors and deposit types, and establishes the metallogenic models and prospecting criteria for this area. The research shows that the metallogenesis of the area is subjected to a dual control of strata + structure obviously. It hosts three types of deposits: skarn, medium and low-temperature hydrothermal (vein), and hydrothermal - skarn complex. Analysis of geological, geophysical, and geochemical data can provide effective indicators for prospecting gold-copper polymetallic deposits. Based on combination of the best prospecting methods for different types of deposits, six types of prospecting criteria are established, which have correlated in genesis and space, including the "Jinchanghe" type, "Dachangwa-Hetaoping" type. "Heniuwa" type, "Heiyanwa" type, "Huangjiadi" type and "Shanxiang" type, In addition, the deep part of Dachangwa-Hetaoping and Douya mining areas is considered a favorable target for searching for "Jinchanghe" type deposits. At present, a hidden deposit of "Jinchanghe" type has been discovered beneath the Dachangwa mining area, which is of great guiding significance to future prospecting in this area.