山西中条山洞沟铜矿地质特征及找矿前景分析

赋存在方解石脉中的铜矿不是铜矿的主要类型,但世界上与碳酸岩和幔源岩浆作用有关的铜矿不仅存在,而且可以达到大型以上的规模.中条山地区曾经是中国铜矿主要产地之一,除了产出沉积变质型铜矿和斑岩型铜矿之外,含铜方解石脉也广泛出现,但以往的地质工作对其找矿前景均给予了"潜力不大"的评价.根据近年来在洞沟方解石脉型铜矿的深部发现独立金矿和独立银矿的事实,结合初步的成因矿物学研究和综合分析,文章认为,中条山铜矿带洞沟方解石脉型铜矿,其成因与胡家峪一篦子沟明显不同,但具有幔源岩浆流体直接成矿的可能性,其深部具有进一步找矿的前景.该研究为区域上重新评价老矿点、开拓找矿思路、拓展找矿空间提供了依据.

Geological characteristics and ore_search prospects of Donggou copper deposits in Zhongtiaoshan area, Shanxi Province

Although copper deposits hosted in calcite veins do not constitute the main type of copper deposits, copper deposits related to carbonatite and mantle-derived magmatism do exist and in some cases can even reach large size in scale. Zhongtiaoshan area was once one of the main producing areas of copper resources in China. Besides the metamorphic sedimentary type and the ancient porphyry type copper deposits, there are abundant copper-bearing calcite veins. However, previous geological work all gave an assessment of "poor potential for prospecting" for these veins. Based on recent discovery of independent gold deposits and silver ore bodies at the depth of the Donggou calcite vein type copper deposit, in combination with a preliminary genetic mineralogy study and comprehensive analysis, the authors consider that the genesis of the Donggou calcite vein type copper deposit is distinctively different from that of the Hujiayu and the Bizigou copper deposits. The Donggou deposit might have resulted from direct mineralization by mantle-derived magmatic fluids, and hence it not only is of remarkable significance as an independent ore type but also has great potential for further prospecting at its depth. In addition, it provides reference for reevaluating the old deposits, broadening the prospecting thought and expanding the prospecting space in Zhongtiaoshan area.