初论地幔热柱与铀成矿的关系

DISCUSSION OF THE RELATIONSHIP BETWEEN MANTLE PLUME AND URANIUM MINERALIZATION

中国东南部分布着大面积的中生代中酸性火山岩，是我国重要的火山岩型铀矿产区。铀矿的分布主要受区域性的断裂构造所控制。对于本区的铀成矿机理前人已进行了系统的研究，本文将从地幔柱的角度进行探讨。在初步介绍了地幔柱的研究现状之后，认为中国东南地幔热柱不仅是中酸性火山岩形成的热动力，而且也是成矿矿化剂（ CO2）的重要来源，它与太平洋─亚欧板块碰撞是统一的，同时参与了地幔交代和岩石圈减薄。地幔柱的脉冲式运动可能是中国东南多次成矿的动力来源和矿化剂的提供者。

There is a large area of Masozoic acidic volcanic rock in southeastern China,which is an important area of volcanic uranium deposits.The display of the uranium deposits is charged by regional fault structure.Many geologists have studied the gensis of mantle plume.After talked about the mantle plume,the article concluded that the mantle plume in southeastern China is not only the heat for acidic volcanic rock,but also the source for mineralizer agent(CO2).The plume corresponds to the Pacific－Eurasia plate collision,joined the mantle－metasomatism and thinning of the lithosphere too.The pulse move of the mantle plume probably was the source of many times mineralization and mineralizer agent for the uranium in southeastern China.