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毕家山多金属矿床为-沉积-再造型矿床。再造成矿作用期间,构造对矿质的初步富集、活化与再造富集具有重要的控制意义。作者运用显微构造和组构研究方法,对矿区北东东向构造带的形成条件以及金属矿物变形特征的综合分析表明,该构造带的形成温度、压力条件与铅、锌等矿质活化,迁移所需要的条件相适应。断裂活动导致了区内金属物质在受控于东西构造带的初步富集的基础上,重新活化,以塑态流动方式迁移,在适当的构造部位再次富集成矿,并沿断裂带,随着变形程度和变形温度的降低,呈现出Cu、Zn、Pb物质的分带富集现象。
The Bijiashan polymetallic deposit is a sedimentary-reconstructive deposit. Reconstruction of the role of the mine during the construction of the initial mineral enrichment, activation and recycling enrichment has important significance. Using microstructures and structural studies, a comprehensive analysis of the formation conditions of the northeaster-northeast tectonic belt and the deformation characteristics of the metallogenic minerals in the mining area shows that the forming temperature and pressure conditions of the tectonic belt activate and migrate with the mineralization of lead and zinc The conditions needed to adapt. The fault activity led to the reactivation of the metal in the area under the control of the initial enrichment of the east-west tectonic belts, the migration of the metal in the mode of plastic flow, the re-enrichment of mineralization at the appropriate tectonic positions and along the fault zone The degree of deformation and the decrease of deformation temperature show the zonation enrichment phenomenon of Cu, Zn and Pb.