杨真亮, 徐韶辉, 高书剑, 薛冰, 刘向东, 王慧. 胶东焦家超巨型金矿床三维空间特征及赋矿规律[J]. 地质通报, 2022, 41(6): 958-967. DOI: 10.12097/j.issn.1671-2552.2022.06.004
    引用本文: 杨真亮, 徐韶辉, 高书剑, 薛冰, 刘向东, 王慧. 胶东焦家超巨型金矿床三维空间特征及赋矿规律[J]. 地质通报, 2022, 41(6): 958-967. DOI: 10.12097/j.issn.1671-2552.2022.06.004
    YANG Zhenliang, XU Shaohui, GAO Shujian, XUE Bing, LIU Xiangdong, WANG Hui. 3D spatial characteristics and ore-host regularity of Jiaojia super giant gold deposit in Jiaodong[J]. Geological Bulletin of China, 2022, 41(6): 958-967. DOI: 10.12097/j.issn.1671-2552.2022.06.004
    Citation: YANG Zhenliang, XU Shaohui, GAO Shujian, XUE Bing, LIU Xiangdong, WANG Hui. 3D spatial characteristics and ore-host regularity of Jiaojia super giant gold deposit in Jiaodong[J]. Geological Bulletin of China, 2022, 41(6): 958-967. DOI: 10.12097/j.issn.1671-2552.2022.06.004

    胶东焦家超巨型金矿床三维空间特征及赋矿规律

    3D spatial characteristics and ore-host regularity of Jiaojia super giant gold deposit in Jiaodong

    • 摘要: 胶东地区近年深部找矿取得重大突破。研究金矿床的三维空间特征对于深化成矿规律认识、指导深部找矿具有重要意义。在基于500个钻孔资料建立的胶东焦家地区三维地质模型的基础上,分析了金矿床的三维空间特征。通过三维透明化分析发现,以往作为独立金矿床勘查、开采的多个浅部矿区,其主要矿体向深部连为一体,构成资源量超过1000 t的同一个超巨型金矿床,矿床主要由3个矿体组成。赋矿的焦家断裂在三维空间上起伏波动较大,沿倾向呈铲式阶梯状形态,在断裂倾角由陡变缓的下部主矿体厚度较大。矿体厚度的三维分布图出现数处厚度较大区域,沿矿体走向和倾向厚度呈现厚-薄相间变化,矿体品位与厚度相关系数为0.337,矿化强度的三维分布显示有4处矿化富集区。分析表明,矿化富集区与断裂倾角变化部位相吻合,且矿体主要富集在倾角较缓部位。认为深部找矿应重视对断裂构造三维空间变化的分析及阶梯模式的应用。

       

      Abstract: In recent years, the deep prospecting in Jiaodong area has made great breakthroughs.It is of great significance to study the 3D spatial characteristics of gold deposits for deepening the understanding of metallogenic regularity and guiding deep prospecting.Based on the data of 500 boreholes, a 3D model of Jiaojia area in Jiaodong is established, and the three-dimensional spatial characteristics of gold deposits are analyzed.Through three-dimensional transparency analysis, it is found that the main ore bodies of several shallow mining areas, which used to be independent gold deposit exploration and mining, are connected to the deep, forming the same super giant gold deposit with a resource of more than 1000 t.The deposit is mainly composed of three ore bodies.The Jiaojia fault, which is the host of ore, fluctuates greatly in three-dimensional space and presents a shovel ladder shape along the dip.The main ore body locates at parts of turning point lower of the fracture inclination.3D distribution map of orebody thickness shows that there are several high value areas.Along the strike and dip of ore body, the thickness presents the alternation of thick and thin.The correlation coefficient between ore body grade and thickness is 0.337.The 3D distribution of ore body mineralization intensity shows that there are four mineralization enrichment areas.The analysis shows that the mineralization enrichment area is consistent with the fault dip angle change position, and the ore body is mainly concentrated in the lower dip angle position.It is considered that deep prospecting should pay attention to the analysis of the 3D spatial variation of fault structure and the application of ladder model.

       

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