扬子地台西缘内带大型铜矿床的“叠加裂谷─多源─热水”成矿作用  

SUPERIMPOSITION RIFT-POLY SOURCES-HYDROTHERMAL MINERALIZATION OF LARGE COPPER DEPOSITS IN THE INNER BELT ALONG THE WESTERN EDGE OF THE YANGTZE PLATFORM

作　　者：吴健民[1] 黄永平[1] 黎功举[1] 

机构地区：[1]中国有色金属工业总公司矿产地质研究院,中国有色金属工业总公司西南地勘局

出　　处：《矿产与地质》1996年第1期17-21,共5页Mineral Resources and Geology

摘　　要：扬子地台西缘的绝大多数大型铜矿床集中在西缘内带，成矿构造环境属川滇叠加裂谷系，它经历了复杂的地质构造演化，产生了“四层楼式”裂谷型铜矿床序列；成矿物质铜以深源为主（上地幔或下地壳），次为浅源（上地壳）和陆源；从元古宙到显生宙，铜矿床由地幔型向幔壳型→壳幔型→壳源型演化；成矿流体包含火山次火山热液、喷流热液、循环热（卤）水和变质－构造热液等多种热水。Most of the large copper deposits along the western edge of the Yangtze platform are in the inner belt where the tectonic setting of mineralization is in the Sichuan-Yuennan superimpostion rift system with complex geological and structural evolution,in which minerogenetic series of the rift type of copper deposits occur as'four floors style'.As for the ore-forming materials,copper was mainly from deep source(upper mantle or lower crust),secondarily from shallow source(upper crust)and continental source.Copper deposits were evolved from mantle type→mantle crust type→crust mantle type→to crust source type.Mineralization fluids included volcanic-subvolcanic hydrothermal fluid, fumarolic effusive hydrothermal fluid, cyclic hot brine and metamorphicstructural hydrothermal fluid etc.

关 键 词：叠加裂谷 多源 热水 扬子地台 铜矿床 成矿作用 

分 类 号：P618.410.5[天文地球—矿床学]