地壳演化与成矿作用——以川滇地洼系“四层楼”铜矿床序列为例

EVOLUTION OF THE EARTH'S CRUST AND METALLOGENESIS——TAKING THE "FOUR FLOORS" MINEROGENETIC SERIES OF COPPER DEPOSITS IN THE SICHUAN YUNNAN DIWA SYSTEM AS AN EXAMPLE

提出川滇地洼系“四层楼”铜矿床序列的形成与陆壳演化的成生关系,是与本区陆壳由前地槽-地槽-地台-地洼演化各阶段与之相匹配的成矿作用的产物。与此同时,并总结了本区“四层楼”铜矿床序列的成矿作用具有明显的继承性、新生性、旋回性及层控性四大特点和多因复成矿床的成矿模式。

The genetic relation of evolution of continental crust to the formation of minerogenetic series of the copper deposits with 'four hoots' in Sichun-Yunnan Diwa system was suggested in this paper. It is the corresponding result of metallogenesis at each stage of evolution from pregeosyncline-geosyncline-platform to diwa of the earth's crust in this region. There occurred copper deposits of four generations, namely, the well known Dahongshan-type marine volcanic Cu-Fe deposits of early Proterozoic, the Dahongshan-type Cu deposits of middle Proterozoic, which are stratified deposits occurring in dolomite beds, the Lanniping sand-conglomerate copper deposits of late Proterozoic and the continental red-bed sand-shale copper deposits of Mesozoic. Meanwhile, it is summarized that the metallogenesis of the 'four floors' minerogenetic series of the copper deposits shows four obvious characteristics: interited, neogenesis, polycycle and strata-bound, and that the metallogenetic model is complex polygenetic one.