摘要
银昆构造成矿带是亚洲巨型SN向构造成矿带───东亚一中亚壳体过渡区构造成矿带的重要组成部分。其主要特点是;①含矿的普遍性,②成矿物质的多元性;③成矿作用的多期性,④大型、超大型矿床的广泛性;⑤矿床的多因复成性。构成上述特点的原因有:①地处东部幔隆区与西部幔坳区和东部薄地壳与酉部厚地壳的过渡带,②属东部NE构造系与西部NW构造系的汇聚区;③其间还发育有多条切割不同属性构造层的壳断裂和岩石圈断裂。该带中新生代时期地幔和壳层的构造分异而导致的构造岩浆活化,造就了银昆构造成矿带。
Yinchuan-Kunming tectonic metallogenic belt is a huge one in Asia trending from the south to north,and it is the cardinal part of the transition span between East Asia crustobody and Central Asia crustobody.Its main characteristics are: (1) prevalent ore bearing ;(2) multiple ore-forming substances ; (3) multipleepoches of mineralization; (4) large and superlarge mineral deposits commonly distributed ; (5) the quality ofpolygerietic compound formation of ore-bodies. All these are due to its special geological environment, thatis, (1)the crust transition span in thickness between the eastern region of mantle uprising and the westernregion of mantle depressing ; (2) the mingling area of the eastern tectonic system trending northeast and thewestern tectonic system trending northwest ; (3) several crust faults and lithosphere faults cutting throughvarious structural layers. The belt is the result of tectono-magmatic activation triggered by the tectonic separating of the crust and mantle during the middle Cenozoic Era.
基金
中国科学院"八五"重点项目
"历史因果论大地构造学的建立及其应用"项目
关键词
成矿带
银昆构造系
成矿期
Tectonic metallogenic belt, multiple epoches, compound formation