摘要
笔者通过对广西德保铜-锡矿床氧化带次生矿物的研究,发现了14种砷酸盐矿物,其中多数为国内首次发现。这些砷酸盐矿物主要是铜的砷酸盐矿物,次为铜和铅的砷酸盐矿物,还有少量铁、铅、钡的砷酸盐矿物。根据这些矿物的共生组合关系,把它们划分为如下组合系列:(1)光线石-橄榄铜矿-墨绿砷铜石-羟砷铜石-德保石-硅砷铜石组合;(2)臭葱石-砷铅铁矿-砷菱铅矾-乳砷铅铜石-砷铜铅石组合;(3)臭葱石-含钡毒铁石-绿砷钡铁石组合。砷酸盐矿物一般形成于温湿多雨的热带—亚热带、pH为6—8,并有大量毒砂和碳酸盐岩存在的硫化物矿床氧化带中。
Through the study of the oxidized zone of the Dabao skarn-type Cu-Sn deposit in Guangxi by the authors, 14 arsenate minerals have been found and most of them are for the first time reported in China. They are mainly Cu arsenate minerals with subordinate Cu-Pb arsenate minerals and Fe-Pb-Ba arsenate minerals.
Based on the relationship of mineral associations the minerals may be divided into the following series: (1) the clinoclasite-olivenite-eornwallite-cornubite-debaoite-copper silicarsenate association; (2) the scorodite-carminite-beudantite-bayldonite-duftite association, and (3) the scorodite-Ba-bearing pharmacosiderite-dussertite association.
Arsenate minerals are formed generally in the oxidized zone of the sulfide-type deposits where in the warm, humid and rainy torrid-subtropical zone with pH 6—8 and a medium of the neutral-weak alkalinity, a large amount of arsenic pyrite and carbonatite exist.
出处
《地质学报》
EI
CAS
CSCD
北大核心
1990年第4期337-343,共7页
Acta Geologica Sinica
