摘要
内蒙古额仁陶勒盖大型独立银矿床产于以安山岩－玄武岩为主的火山一次火山岩中，矿体倾断裂构造产出，主要矿体分布于南北长近10km，东西宽约15km的范围内，除银外，伴生的铅、锌、锰等均不具工业价值。该矿床已发现银的独立矿物20余种，主要与黄铁矿、菱锰矿及少量方铝矿、闪锌矿共生。地质特征显示出了矿床相对于围岩的后成特点，地球化学证据表明该矿床的形成是以火成宕（火山－次火山岩）为矿源岩的后成改造型银矿床。
The Erentaolegai large-sized independent Ag deposit in Inner Mongolia occurs in the vol-canic-subvolcanic rocks consisting mainly of andesite and basalt. The orebodies occur along the fault structure, with the major ones distributed within an area measuring about 10 km in length from south to north and 1. 5 km in width from east to west. With the exception of Ag, other asso-ciated metals such as Pb, Zn, Mn are of no commercial importance. Up to now, more than twenty independent Ag minerals have been identified in the deposit, which are chiefly associated with pyrite, rhodocrosite and minor amounts of galena and sphalerite. Its geological features show that the deposit postdated its country rocks. Geochemical evidence indicates that the ore deposit is a re-worked-type epigenetic Ag deposit with igneous rocks (volcanic-subvolcanic rocks) as the source rocks.
出处
《矿物学报》
CAS
CSCD
北大核心
1996年第2期152-157,共6页
Acta Mineralogica Sinica
基金
国家自然科学基金!49133080
关键词
成矿作用
地球化学标志
银矿床
independent Ag deposit
metallogenesis
geochemical mark
