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羊拉大型铜矿床位于滇西北德钦县,为金沙江构造带内的代表性矿床,其矿床成因和成矿模式尚未取得统一认识。本文从地层划分、岩浆岩及其构造背景、成矿物质和成矿流体来源、成矿时代与矿床成因等方面分析了研究进展,提出了“热水沉积-岩浆热液成矿-构造热液改造”成矿模式。海西期热水沉积作用提供部分成矿物质,但未形成规模铜矿体;晚印支期岩浆热液成矿作用为最主要成矿期,形成羊拉铜矿的接触交代型主矿体,其残余岩浆浅成就位形成石英斑岩脉及斑岩型矿体;燕山-喜山期构造热液改造成矿作用使不同矿体进一步富集或贫化,并错段矿体形成不同的矿段。
Yangla large copper deposit is located in Deqin County, northwestern Yunnan, and is a representative deposit in the Jinshajiang structural belt. The genesis and metallogenic model of the ore deposit have not been unanimously recognized. In this paper, the research progresses are analyzed in terms of stratigraphic division, magmatic rocks and their tectonic setting, sources of metallogenic materials and ore-forming fluids, metallogenic epochs and genesis of ore deposits. The authors put forward the following suggestions: “hydrothermal sedimentation-magmatic hydrothermal mineralization- Liquid transformation ”metallogenic model. Hercynian hydrothermal sedimentation provided some metallogenic material, but no large-scale copper ore body was formed. Late Indosinian magmatic hydrothermal mineralization was the most important metallogenic stage, forming the contact metasomatism host ore of Yangla copper deposit , And the remnant magma formed into a quartz porphyry vein and a porphyry in a shallow succession. The Yanshan-Himalayan tectono-hydrothermal mineralization enhanced the enrichment or depletion of different ore bodies and formed different ore bodies in the wrong segment Mining section.