通过广西金山金银矿区现场地质调查和构造编图,系统总结了矿区构造控矿规律.在此基础上针对主控矿断裂开展地球化学找矿研究.矿区兼有产于主控矿断裂带中的蚀变岩型金矿和侧羽状张裂带中的石英脉型金矿两种类型,不同的构造环境控制不同的矿化类型,可互为找矿标志;矿体受构造界面控制,控矿断裂成矿期不均一张开导致矿化分段富集;成矿期的构造活动表现为主断裂上盘向南西斜滑,相应地矿体向南西侧伏、倾斜延深明显大于延长;矿体中部厚、两侧薄,11号勘探线为矿化富集中心.随热液蚀变的增强,Ag、Au、Cu、Pb和Zn含量逐渐增高.因子分析表明,矿区主成矿元素组合为Ag、Au、Cu、Pb和Zn,可作为找矿的指示元素.元素分布型式、元素组合分析和分形分维统计显示,本区Ag、Au成矿具多阶段性.矿区构造地球化学原生晕分带序列自上而下为Au-Hg-As-Bi-Sn-Sb→W-Co-Cr-Ti-Ni-Ag-V-Mn→Cu-Zn-Pb-Mo,显示该矿床为-浅剥蚀矿床.在综合分析成矿构造、岩浆活动、蚀变特征和构造地球化学原生晕分带资料的基础上,认为矿区深部和外围仍有较好的找矿前景.其中矿区深部找矿重点在11线南西侧.%Through the field investigation and structural maping of the Jinshan Au-Ag mining area in Cuangxi Province, the ore-controlling structural regularities have been summarized. On this basis, the prospecting study of geochemistry was carried out in the main ore-controlled fault zone. There are two deposit types in the mining area, one is altered rock type gold deposit which was hosted in the main ore-controlled fault zone, and the other is quartz vein type gold deposit which was hosted in the flank pinnate tension fracture. The different mineralization types were controlled by the different tectonic environment, and they can be a prospecting criteria for each other. The orebody was controlled by the tectonic interface. The mineralization have obviously sub-enrichment regularity because the ore-controlling fault opened heterogeneously in the mineralization period. The tectonic activities in mineralization period shows the hanging wall of the main fault oblique-slipped toward southeast, accordingly the orebody is SW-Iateral trending and its depth is greater than extension. The middle of orebody is thicker than both sides, and the exploration line No. 11 is the enrichment center of mineralization. The concentrations of metallogenic elements, Ag, Au, Cu, Pb, and Zn increased with increasing alteration. Factor analysis show the main metallogenic elements association is Ag, Au, Cu, Pb, and Zn, which can be used as indicator elements. The elements distribution patterns, combination analysis and fractal dimension statistics show that multistage silver and gold mineralization. The zoning sequence of tectono-geochemical primary halo is Au-Hg-As-Bi-Sn-Sb→Mn-V-Ag-Ni-Ti-Cr-Co-W→Mo-Pb-Zn-Cu from upper to down, which shows that the deposit is a shallow denudated deposit and may be superimposed by late-stage hydrothernal fluids. On the basis of the analysis of ore-forming structures, the magmatic activities, the characteristics of alteration zone and tectono-geochemical primary halo zoning, it can be proposed that the deep and periphery of the mining area have still better prospecting potential. The key zone of prospecting is in the southwest of the exploration line No. 11.
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