高海东, 胡宝群, 吕古贤, 郭涛, 申玉科, 李旺超. 山东玲珑金矿50号脉三维构造蚀变岩地球化学特征及深部预测[J]. 地质通报, 2020, 39(11): 1793-1806.
    引用本文: 高海东, 胡宝群, 吕古贤, 郭涛, 申玉科, 李旺超. 山东玲珑金矿50号脉三维构造蚀变岩地球化学特征及深部预测[J]. 地质通报, 2020, 39(11): 1793-1806.
    GAO Haidong, HU Baoqun, Lü Guxian, GUO Tao, SHEN Yuke, LI Wangchao. Geochemical characteristics and deep prediction of tectonic alteration rocks in No. 50 vein of the Linglong gold deposit, Shandong Province[J]. Geological Bulletin of China, 2020, 39(11): 1793-1806.
    Citation: GAO Haidong, HU Baoqun, Lü Guxian, GUO Tao, SHEN Yuke, LI Wangchao. Geochemical characteristics and deep prediction of tectonic alteration rocks in No. 50 vein of the Linglong gold deposit, Shandong Province[J]. Geological Bulletin of China, 2020, 39(11): 1793-1806.

    山东玲珑金矿50号脉三维构造蚀变岩地球化学特征及深部预测

    Geochemical characteristics and deep prediction of tectonic alteration rocks in No. 50 vein of the Linglong gold deposit, Shandong Province

    • 摘要: 玲珑金矿深部找矿一直是矿床科研生产的难点,经济有效的矿体深部预测,是矿山可持续发展的必要手段。通过对玲珑金矿50号脉地质特征观察及已开采的不同中段的穿脉、沿脉按过矿剖面取样,并取未蚀变岩体作为背景样,测试主量元素及14个微量元素,以过矿剖面为单位,对比矿体及两侧围岩的地球化学特征,并计算元素间的相关性、聚类分析,统计不同蚀变岩体和矿体中微量元素平均值、标准值等,应用地球化学原生晕的方法在平面和纵切剖面上做原生晕地球化学图,从三维构造蚀变岩地球化学方法对50号脉深部进行成矿预测。结果表明:①50号脉As、Ag、Bi、Co、Mo为Au的最佳指示元素;②从围岩到矿体,Au、Ag、As、Cu、Pb、Bi、Mo等元素明显增高;③50号脉原生晕垂直分带序列自上而下为Mn→Mo→As→V→Bi→Co→Au→Ni→Cu→Ag→Pb→Sb→Zn,表现为"反分带"序列,预测50号脉体在深部有较好的成矿前景。

       

      Abstract: The deep prospecting of the Linglong gold deposit is always a difficult point in the scientific research and production of the deposit. In this paper, through the observation of geological characteristics of No. 50 vein and the sampling of cross vein and following-vein in different middle sections and with the undisturbed rock mass as the background sample, the authors determined the major elements and 14 trace elements. The geochemical characteristics of the orebody and surrounding rocks on both sides were compared by taking the ore-passing section as the unit, the correlation and cluster analysis of elements were conducted, and different altered rock masses and orebodies were counted. According to the average and standard values of trace elements, the geochemical primary halo method was used to map the primary halo on the plane and along the longitudinal section, and the metallogenic prognosis of No. 50 vein was carried out by using the geochemical method of three-dimensional structural altered rocks. The results are as follows: ①As, Ag, Bi, Co, Mo are the best indicator elements for Au in vein No. 50; ②The values of Au, Ag, As, Cu, Pb, Bi and Mo obviously increase from surrounding rocks to the orebody; ③The vertical zonation sequence of primary halo of No.50 vein is Mn→Mo→As→V→Bi→Co→Au →Ni→Cu→Ag→Pb→Sb→Zn from top to bottom, showing "reverse zonation" sequence. Based on the above research results and geological analysis, it is predicted that No. 50 vein body has a good metallogenic prospect in the deep part.

       

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