滇东北会泽地区发现铝土质泥岩铜矿

Discovery of a bauxitic mudstone-hosted copper deposit in the Huize area, northeastern Yunnan, China.

最新研究显示,位于云南会泽县的大黑山层状铜矿的矿化分布于上二叠统峨眉山玄武岩顶部间断面(假垫合面)之上的宣威组底部,明显受铝土质泥岩层位的控制。对矿床地质特征的研究及与国内典型砂岩铜矿的对比显示,该矿床在成矿背景、赋矿围岩岩性和成矿地质特征上,有别于中国南方川滇地区的砂岩／页岩铜矿,是一种新的铜矿类型。根据赋矿围岩和沉积层控等宏观地质特征,暂定为“铝土质泥岩铜矿”

R.ecent study shows that mineralization of the Daheishan stratiform copper deposits, in Huize County, Yunnan, occurs at the bottom of the Xuanwei Formation above the hiatus surface （disconformity） on the top of the Upper Permian Emeishan basalt and is obviously controlled by horizons of bauxitic mudstone. The geological characteristics of the deposit and its comparison with typical sandstone-hosted copper deposits in other areas of China suggest that this deposit is a new type of copper deposit, different from sandstone- or shale-hosted copper deposits in Sichuan and Yunnan, southern China, with respect to the metallogenic setting, host rocks and metallogenic-geological characteristics. According to its macroscopic geological characteristics such as the host rocks and stratabound sedimentary character, it is tentatively termed the ＂bauxitic mudstonehosted copper deposit＂.