西昆仑地区卡兰古MVT型铅锌矿床成矿作用和成矿物质来源探讨

METALLOGENESIS OF KALANGU MVT TYPE LEAD ZINEDEPOSIT AND SOURCES OF MINEROGENETIC MATERIALS IN WESTERN KUNLUN

卡兰古MVT型铅锌矿区,在大地构造位置上,处于西昆仑造山带与塔里木板块交接部位的晚古生代奥依塔格—库尔良裂陷槽的北段,属于西昆仑地区库斯拉甫—他龙铅锌成矿带的一部分。作者通过详实的野外考察和综合室内测试、岩矿鉴定等研究资料分析,认为其成矿物质主要来源于古老基底以及早古生代奥陶系;在成矿作用过程中,喜马拉雅期逆冲推覆褶皱作用所引发的大规模热卤水运移、循环(特别是油田卤水与深层流体的混合),导致了矿质的进一步富集、沉淀。

Kalangu MVT type lead zinc deposit is situated to the tectonic connection of the west Kunlun orogenic belt and Tarimu block, belongs to the north section of Late Palaeozoic Aoyitage Kuerliang fractured trough, is one part of the west Kunlun Kusilafu Talong lead zinc copper minerogenetic belt. Based on the abundant information from detailed field investigation, measuring and indoor rock mineral identifying,the authors regard that the minerogenetic matters come from the old basement and Early Palaeozoic Ordovician system. During the minerogenetic process, a large scale of hot brine moving, circulating caused by Himalayan reversed napped folds, especially when the oil field brine mixed with deep flquids, causes minerogenetic materials to be enriched and precipitated.