四川石棉大水沟碲矿床稀土元素地球化学特征

摘要

通过对大水沟碲矿床矿体与围岩稀土元素地球化学组成及特征研究表明，矿体与围岩的稀土元素特征截然不同，表明它们形成于同一地质时期和地质环境。大水沟碲矿床受岩浆作用改造，成矿物质应源于岩浆岩，且围岩与矿体存在氧化还原地球化学界面；稀土元素球粒陨石标准化分配模式图显示，大水沟赋矿围岩、贫碲矿石稀土元素具有大陆拉斑玄武岩的稀土元素特征，表明该碲矿床成因与峨眉山玄武岩有关。%Study of REE geochemistry for the ore and wall rock from the Dashuigou Te deposit indicates that ore material was derived from magmatic rock. The chondrite-normalized REE patterns for the wall rock and lean ore are characteristic of continent tholeiite which indicates that this deposit is related to the Emeiahn basalt in origin.