地幔热柱及其成矿作用研究

Mantle Plume and its Mineralization

成矿作用研究表明 ,在地球的演化历史中 ,成矿数量有从少到多 ,聚矿能力有由弱到强的演化趋势。中生代为全球规模的成矿大爆发阶段 ,究其原因可能与地球的发展演化密切相关。地球形成的早期 ,由于地球物质尚未充分分异 ,成矿强度不大。当然 ,有部分在地球演化早期形成的矿床 ,在后来的多次构造改造过程中被改造迁移 ,甚至消失。中生代地球进入了一个强烈的地幔热柱活动时期 ,聚集于D”层及外核的成矿物质可通过地幔热柱多级演化向上迁移 ,并在幔枝构造的有利构造扩容带中成矿 。

The study of metallization have shown that metallogenic gauntly and ability of gathering ore has been more and more with evolution of the earth. The reason for the global-scale Mesozoic metallogenic explosion may be relation to development of the Earth.The early of the Earth evolution, the intensity of metallogenesis is weak, owing to the Earth's materials was not differentiated fully. Without doubt, formed deposits during the early of the earth evolution perhaps has been changed, migrated, even lost. The Earth has get into strong active stage of mantle plume since Mesozoic, ore-foring materials gathered in D ″and outer of the Earth moved up through the multiple evolution of mantle plume, and formed deposits in structural spreading zone of mantle branch structure. Thus mantle branch have came main ore-forming and ore-controlling structural type for Mesozoic