贵州西南部红土型金矿成矿背景及其控制因素

Geological Settting and Controls for Latentic Gold Mineralization in Southwestern Guizhou

分布在贵州西南部的红土型金矿，是90年代初发现的一种新的金矿类型，产于扬子陆块内部的造山带外带，系金及其相关元素的高背景区，面型隆升的喀斯特高原地貌及上、下二叠统之间的喀斯特不整合。其主要控矿因素是：丰富的卡林型金矿作为矿源母岩，新生代以来温暖潮湿的气候，下二叠统石灰岩构成的喀斯特及其地貌，缓慢抬升的地壳及其相对平缓稳定的环境，以及特定地文期和有利的水文地质动态系统。

The latentic gold dePOSits in the eastern Yun-Gui plateau between Yunnan andGuizhou, which were discovered during the early 1990s - subsequently, it came into the time thatthey were extensively explored and in mass produced, are another type in the karstically well-developed mountainous areas following the discovery of the Carlin-type gold depoSits. This new type of golddeposits can be identified as two groups in genesis: karst-collapse-originated gold laterites and para-au- tochthonous and/or autochthonous gold latentes. The orebodies composed of soil-like ores occur assheets or lens confined by single hole, in which gold is free and invisible. The author's studies suggestthat there is a combination necessary to form this type of gold dePOSits, including abundance of primary Carlin-type gold deposits served as the source of ore-forming material, topography characterized bydisconformable basement of the lower Permian limestones subject to karstification, and a favorable hydrogeologic system for oxidation which took place in mild and humid conditions during the early Cenozoic and under tectonic setting with a slow uplift of relatively-stabilized crust.