摘要
包裹体地球化学研究表明，四川冕宁稀土矿床中存在着岩浆成因的萤石、重晶石和方解石，它们的微量元素地球化学特征与热液成因对应矿物有明显差别：岩浆成因重晶石相对富集亲石元素，贫亲硫元素；无论是岩浆成因重晶石，还是萤石均明显富集挥发分。稀土元素地球化学研究显示，不同成因萤石、重晶石在稀土元素总量、ＬＲＥＥ／ＨＲＥＥ、（Ｌａ／Ｙｂ）Ｎ、δＥｕ及δＣｅ等一系列稀土元素地球化学参数上都存在明显的差异。该项研究还揭示了岩浆成因萤石、重晶石是在相对还原和酸性体系内结晶而成的。
The study on inclusion geochemistry shows that there exist magmatogenetic minerals, such as fluorite, barite, calcite in the Miannin REE deposit, Sichuan Province. The geochemical characteristics of their trace elements are different from those of hydrothermal minerals. The Miannin deposit has higher content of trace elements in fluorite than hydrothermal those. The magmatogenetic barite is rich in lithophile elements but poor in sulfophile ones.Both magmatogenetic barite and fluorite are extremely rich in volatile components. Barite and fluorite possess different REE geochemical characteristics depending on their origin. Magmatogenetic fluorite and barite crystallize in an acidic and reducing environment.
出处
《地球化学》
CAS
CSCD
北大核心
1995年第3期287-293,共7页
Geochimica
基金
国家自然科学基金
