摘要
湖南东坡矿田铅锌矿床是典型的沉积-热液改造(叠加)型层控矿床。含矿岩系为中、上泥盆统。该区在早泥盆世末期就开始了拉张盆地的演化,拉张盆地的热沉降导致了成矿物质的早期富集和矿化。铅锌矿的形成经历了三个阶段:盆地演化的同生断裂阶段成矿物质的初步富集、后生断裂阶段早期铅锌矿体的形成、千里山花岗岩的侵入。
The Pb-Zn deposits in Dongpo orefield are typically sedimentary-hydrothermal reworkingstrata-bounded deposits. The rock formation of the Pb-Zn deposits is M. U. Devonian. The ore beds areclasitics and carbonates. It is proved in ds artcle that the mineralization had preformed since the eval-uation of sedimentary basin of this region in late E. Devonian. The first collection and mineralization ofpb-Zn elments resulted from the thermal subsidence of extendonal basin here. There are three phasesof Pb-Zn deposits' forming in this region:(1) Pb-Zn elements were first colected during the syn-rift stag of the evaluation of basih;(2) The early ore deposits were forming during the post-rift stage of the evaluation of basin;(3) Pb-Zn deposits of the sedimentary-hydrothermal rewoking (superimposing) were formed as theintrusion of Qianlishan granite.
关键词
铅锌矿床
成矿作用
地质
矿田
Dongpo orefield
lead-zinc ore
sedimentary-hydrothermal reworked(superimposed) deposits
extensional basin
