凤-太多金属矿集区主要金属矿床成矿系列与找矿方向
The Main Metal Deposits Metallogenic Series and Exploration Direction in Feng-Tai Ore Cluster Region, Shaanxi Province
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摘要: 通过对凤-太多金属矿集区区域地质背景及地球化学、地球物理特征的综合研究,结合区内已知矿床的系统分析,把凤-太多金属矿集区主要金属矿床划分为3个成矿系列,即泥盆纪碳酸岩盐容矿的铅锌矿床成矿系列、泥盆纪沉积改造型铜矿床成矿系列和中生代与造山作用有关的金矿床成矿系列。提出长沟-洞沟地区、凤州七里坪地区、苇子坪洞沟-剪子沟地区等为近期的找矿重点地区,并对长沟-洞沟地区、梯子崖—三角崖地区指出了具体的找矿方向,认为长沟-洞沟地区的已知铅锌矿带与八卦庙金矿床处于同一次级热水沉积盆地中,其范围大致与河-2异常吻合,成矿条件良好,长沟背斜南翼(倒转翼)、倾伏端和洞沟背斜长沟—八卦庙段是下一步铅锌金的重要找矿地段。这些对该区的找矿工作具有重要的指导意义。Abstract: On the base of comprehensively researching regional geological background, geochemical and geophysical characteristics in Feng-Tai multi-metal ore cluster region and combined with systematicly analyzing discovered mineral deposits here, there could be divided into three metallogenic series, including Devonian carbonate rock-hosted lead and zinc deposit metallogenic series, Devonian sedimentary reformation typed copper deposit metallogenic series, and Mesozoic orogenesis-related gold deposit metallogenic seried. It is concluded that Changgou-Donggou,Qiliping in Fengzhou and Weiziping-Donggou-Jianzigou region are very important for exploration in the nearfuture,and point clear prospecting direction for Changgou-Donggou,Tiziya-Sanjiaoya region. It is considered that discovered lead and zinc zone in Changgou-Donggou located in the same secondary hydrothermal sedimentary ba sin with Baguamiaogold deposit,which range coincide with that of He-2 anomaly,where hase good metallogen ic condition. South limb(overturned limb)and plunging end of Changgou anticline and Changgou-Baguamiao segment of Donggou anticline are animportan texploration target for lead,zinc and gold. These have important significance to guide exploration work in Feng-Tairegion.
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