粤北锑矿床基本地质特征及其硅化蚀变  

The General Geological Characteristics and Silicification of Antimony Deposits in North Guangdong Province

作　　者：李雪[1] 王润婷 李梦霞 LI Xue;WANG Runtin;LI Mengxia(College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

机构地区：[1]成都理工大学地球科学院,四川成都610059

出　　处：《四川有色金属》2019年第1期50-52,共3页Sichuan Nonferrous Metals

摘　　要：本文所探讨的硅化作用是指经常看到的锑汞矿床中以碳酸盐岩等的围岩热液蚀变为主,主要是将未蚀变的岩石与蚀变产生的硅化岩的化学成分进行比较,证明是否有明显的物质置换。根据有锑矿必有硅(矽)化岩,没有硅化的灰岩就没有锑矿;含锑矿围岩地质年代不同;硅化岩与围岩整合;在白毛岭的硅化岩中发现腕足类化石;在葛藤坪、观音坐莲等地发现有石英小脉侵入灰岩裂缝中,有残余的未硅化岩体小块灰岩存在于邓家岭(乐家湾)和东官冲的硅化岩中,认为这种硅化岩不是由砂岩变质而来的"石英岩",此种硅化作用与锑矿生成有密切关系。The silicification discussed in this paper refers to the hydrothermal alteration of surrounding rocks such as carbonate rocks in antimony-mercury deposits. The chemical composition of unaltered rocks is compared with that of altered silicified rocks, which proves that there is obvious material replacement. According to the fact that there must be silicified rocks in antimony deposits, there will be no antimony deposits in limestone without silicification;the geological age of Antimony-bearing surrounding rocks is different;silicified rocks are integrated with surrounding rocks;brachiopods are found in silicified rocks in Baimaoling;quartz veins are found to intrude into limestone fractures in Getengping and Guanyinzilian, and small pieces of limestone remain in unsilicified rocks are found. The rocks exist in the silicified rocks of Dengjialing (Lejiawan) and Dongguanchong. It is believed that the silicified rocks are not "quartzite" derived from sandstone metamorphism. This silicification is closely related to the formation of antimony deposits.

关 键 词：锑矿床 围岩蚀变 硅化 

分 类 号：P618[天文地球—矿床学]