白云鄂博矿区周围火成碳酸岩岩墙地质特征

SYSTEMATIC GEOLOGICAL INVESTIGATION ON CARBONATITE DYKES IN BAYAN OBO, INNER MONGOLIA, CHINA

首次填出白云鄂博矿区周围火成碳酸岩岩墙的分布图，深入系统地研究了岩墙的地质产状、主矿物类型、岩石结构、人工重砂矿物组成、稀土元素含量等特征。反映了白云鄂博矿区周围火成碳酸岩岩墙的岩浆演化分异过程存在差异。对于研究白云鄂博矿区铁与稀土的矿化提供了物质来源的证据。

The geological map showing distribution of carbonatite dykes around the Bayan Obo NbREEFe mine was firstly presented. A systematic study on occurrence, mineralogical type, rock texture, mineral component and REE content of those carbonatite dykes has been carried out. The results indicate that there existed differences of magmatic evolution during the formation of those carbonatite dykes. It implicates that the carbonatite magma may be a source for NbREEFemineralization of the Bayan Obo deposit.