云南先锋硅藻土矿床地质特征及成因分析

GEOLOGICAL CHARACTERISTICS AND GENETIC ANALYSIS OF XIANFENG DIATOMACEOUS DEPOSIT IN YUNNAN PROVINCE

先锋硅藻土矿床发育在一小型山间地盆内,时代为晚第三纪中新世,属水体平静,适温内陆湖相沉积。成矿物质来源于晚二叠世峨嵋山玄武岩地层和早寒武世磷块岩。先锋硅藻土矿床,蛋白石含量低,烧失量高,但是,硅藻土矿厚度大,储量大,充分利用先锋硅藻土矿有深远的重要性。

Xianfeng diatomaceous deposit developed in a small intermountain basin in Miocene Period of Upper Tertiary belongs to the sediment of in land lake facies with calm water and well temperature. The minerogenic material originates from basalt formation of Upper Permian in Emei Mountain and phosphate rock of Lower Cambrian.Although the opal content of Xianfeng diatomaceous deposit is low and burning loss is high,its thickness and reserve are big,therefore, fully using this diatomaceous deposit is very imurotant.