张宝林, 吕古贤, 余建国, 王翠芝, 贾文臣. 胶东玲珑金矿田不同矿段构造变形岩相带特征与深部找矿预测[J]. 地质通报, 2020, 39(11): 1681-1691.
    引用本文: 张宝林, 吕古贤, 余建国, 王翠芝, 贾文臣. 胶东玲珑金矿田不同矿段构造变形岩相带特征与深部找矿预测[J]. 地质通报, 2020, 39(11): 1681-1691.
    ZHANG Baolin, LÜ Guxian, YU Jianguo, WANG Cuizhi, JIA Wenchen. A comparative study of the characteristics of tectonic deformation lithofacies belts in different ore blocks of the Linglong gold orefield in Jiaodong and the deep ore-prospecting prognosis[J]. Geological Bulletin of China, 2020, 39(11): 1681-1691.
    Citation: ZHANG Baolin, LÜ Guxian, YU Jianguo, WANG Cuizhi, JIA Wenchen. A comparative study of the characteristics of tectonic deformation lithofacies belts in different ore blocks of the Linglong gold orefield in Jiaodong and the deep ore-prospecting prognosis[J]. Geological Bulletin of China, 2020, 39(11): 1681-1691.

    胶东玲珑金矿田不同矿段构造变形岩相带特征与深部找矿预测

    A comparative study of the characteristics of tectonic deformation lithofacies belts in different ore blocks of the Linglong gold orefield in Jiaodong and the deep ore-prospecting prognosis

    • 摘要: 大规模勘探结果表明,胶东主要金矿田深部存在第二富集带,显示深部找矿潜力巨大。"深部第二富集带"受什么因素控制,深部预测的目标是什么,成矿边界在哪里,这些关键问题值得深入研究。结合"岩浆核杂岩隆起-拆离凹陷"构造系统和"米字型"构造控矿模式,提出将"构造变形岩相带"作为深部找矿预测目标和成矿边界,建立新的深部找矿预测标志。以玲珑矿田为例,综合对比各矿段3个主要方向(NEE、NE、NNE)构造变形岩相带的空间分布、物质成分、结构构造、形成时间、成岩成矿深度等特征,总结矿化富集规律及其向深部的变化趋势,探讨不同方向构造变形岩相带的时空演化关系。从"深部第二富集带"发育程度看,这些已知构造变形岩相带的深部都有找矿潜力,其外围可能存在平行的、更大深度的构造变形岩相带。

       

      Abstract: Large-scale exploration results show that there are the second enrichment zones in the deep part of the main gold orefields in Jiaodong, indicating great potential for deep exploration. What factors control the "deep second enrichment zone"? What are the goals of deep prediction? Where is the metallogenic boundary? These key questions deserve further study. In this paper, combined with the tectonic system of "uplift and depression detachment of magmatic core complex" and the ore-controlling model of "米-type" structure, it is proposed to take "tectonic deformation lithofacies belt" as the prediction target and ore-forming boundary of deep ore-prospecting and establish a new prediction indicator of deep ore-prospecting. Taking the Linglong gold orefield as an example, the authors conducted the comprehensive comparison of the spatial distribution, material composition, structure characteristics, formation time, diagenetic mineralization depth of tectonic deformation facies belts in three main directions (NEE, NE, NNE) in different blocks of the orefield, with the summary of deep mineralization enrichment regularity and its variation trend. The spatial-temporal evolution relations of tectonic deformation facies belts in different directions were discussed. From the development degree of the "deep second enrichment zone", it can be seen that these known tectonic deformation lithofacies belts have ore-prospecting potential in the deep part, and there may be parallel and deeper tectonic deformation lithofacies belts in the periphery.

       

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