Deterministic modelling for driving factors of mineralization in Shanggong gold deposit (China)

Sukun Zhang , Cuihua Chen , Junqiang Xu , Xing Jin , Hui Wang , Shaoping Feng , Xinhui Liang
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Abstract

1. Three-dimensional (3D) deterministic modeling is crucial for analyzing the controlling factors of mineralization. The Shanggong gold deposit, situated in the southern margin of North China Craton, represents a magmatic hydrothermal deposit. To construct the 3D deterministic model, boreholes, cross-sections, and geochemistry assays are integrated based on the geological characteristics of the Shanggong gold deposit. This paper summarizes its contents as follows: 1) GoCAD software can be utilized to build a 3D geology model encompassing faults and ore bodies; 2) Geostatistics and discrete smooth interpolation (DSI) can be employed to create a 3D attribute model involving grade and Au/Pb ratio. The findings reveal that: 1) High-value zones are associated with NE and NNE trending cross faults; 2) Deterministic modeling, such as grade model and Au/Pb ratio model, effectively elucidates the metallogenic process mechanism.

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上宫金矿床成矿驱动因素的确定性模型(中国)
1.三维(3D)确定性建模对于分析成矿控制因素至关重要。上宫金矿床位于华北克拉通南缘,是一个岩浆热液矿床。为了构建三维确定性模型,根据上宫金矿床的地质特征,对钻孔、横断面和地球化学化验进行了整合。本文内容概述如下:1)利用 GoCAD 软件建立包括断层和矿体在内的三维地质模型;2)利用地质统计学和离散平滑插值法(DSI)建立涉及品位和金/铅比(Au/Pb ratio)的三维属性模型。研究结果表明1)高价值区与 NE 和 NNE 走向的交叉断层有关;2)品位模型和 Au/Pb 比率模型等确定性模型可有效阐明成矿过程机制。
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