澜沧老厂红土型银矿床成矿条件及找矿标志

来源期刊：中南大学学报(自然科学版)2000年第3期

论文作者：陈百友 王增润 张映旭 陈伟

文章页码：195 - 198

关键词：红土型银矿床;成矿条件;找矿标志;老厂

Key words：lateritic silver deposit; metallogenic conditions; prospecting criteria; Laochang

摘    要：老厂红土型银矿床含银矿源体为中上石炭统碳酸盐岩.通过研究该矿床成矿条件,认为含银矿源体的形成与大陆边缘裂谷构造和中晚石炭世沉积喷流作用密切相关,并与早石炭世火山作用有间接联系;银的次生富集条件是温暖潮湿的古气候、相对平缓的古地貌、碳酸盐岩岩性和中上石炭统地层层位.最后提出了老厂式红土型银矿床的找矿标志.

Abstract: The silver-bearing source unit of the Laochang lateritic silver deposit is carbonate rock of middle and upper Carboniferous. This paper deals with the metallogenic conditions of the deposit. It is suggested that the formation of the silver-bearing source unit has a great deal to dowith continental marginal rift structure and sedimentary exhalation ofmiddle and late Carboniferous and has some indirect relations with early Carboniferous volcanicity. The conditions of silver secondary enrichment are warm and humid paleo-climate, relatively gentle paleo-topography, lithololgy of carbonate rock and stratigraphic horizon ofmiddle and upperCarboniferous. The prospecting criteria forLaochang-type lateritic silver depositwas put forward in the end.