| 云南北衙斑岩-矽卡岩金铜矿床三维可视化建模与应用 |
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| 引用本文： | 周放,王保弟,贺娟,郝明,王鹏.云南北衙斑岩-矽卡岩金铜矿床三维可视化建模与应用[J].中国地质,2022,49(1):241-252. |
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| 作者姓名： | 周放 王保弟 贺娟 郝明 王鹏 |
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| 作者单位： | 中国地质调查局成都地质调查中心 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）项目（2016YFC0600305,2018YFC060410603）资助~~; |
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| 摘 要： | 研究目的]位于金沙江—红河巨型构造-岩浆成矿带中段的北衙超大型矿床(已探明金151.28 t,铜22.17万t),是三江特提斯成矿域东段典型的斑岩-矽卡岩型金多金属矿床.近年来,矿床浅部地质结构与资源状况已得到初步揭示,但是其深部地质结构、深部控矿构造及深部找矿潜力还不清楚,制约了深部的找矿发现.研究方法]本研究以...
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| 关 键 词： | 斑岩-矽卡岩金铜矿床 三维建模 矿床可视化 建模应用 金沙江—红河成矿带 矿产资源勘查工程 北衙 云南 |
| 收稿时间： | 2019/7/16 0:00:00 |
| 修稿时间： | 2020/2/20 0:00:00 |
3D visualization modeling and application study of porphyry-skarn gold-copper deposits in Beiya Area, Yunnan Province |
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| ZHOU Fang,WANG Baodi,HE Juan,HAO Ming,WANG Peng.3D visualization modeling and application study of porphyry-skarn gold-copper deposits in Beiya Area, Yunnan Province[J].Chinese Geology,2022,49(1):241-252. |
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| Authors: | ZHOU Fang WANG Baodi HE Juan HAO Ming WANG Peng |
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| Institution: | Chengdu Center of Geological Survey, CGS. Chengdu 610081, Sichuan, China |
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| Abstract: | This paper is the result of mineral exploration engineering.Objective]Beiya supergiant deposit (explored Au:151.28 t, Cu:0.2217 Mt)located in the large-scale Jinsha river-Red river tectonic-magma-metallogenic belt, which is the typical porphyry Au polymetallic deposit in the southeastern margin area of Sanjiang -Tethys metallogenic domain. For the past few years, the shallow geological structure and resources of the deposit have been preliminarily revealed. However, its deep geological structure, deep ore-controlling structure and deep ore prospecting potential are still unclear, which restricts the prospecting and discovery of deep orebody. Methods]In this paper, the shallow spatial geological body at 1000 m of Wandongshan ore block of the Beiya gold polymetallic deposit is taken as the research object. We choosing the "block modeling method" and the "double-sided method" to establish 3 D visualization of Wandongshan ore block and orebody model of Au deposit by using the SKUA-GOCAD platform. Further, Kriging interpolation was employed to acquire grade distribution model of Au based on analytical of spatial variation distribution characteristics and analog variogram. Results]In the light of grade distribution model and orebody model, 246 t gold resource was assessed. Meanwhile, a dominant Au-enrichment belt was revealed along the 40° direction of Wandongshan ore block. Conclusions]Compared with the "slice method", the "double-sided method" can quickly and accurately establishes the three-dimensional model of the ore body. It is believed that the NE trending (40°) gold-grade preponderant enrichment zone is manifested in the shallow part of the hidden deep and large fault, which demonstrate Au is not only enrichment in the contact-alteration zone between intrusion and carbonate, but also concentrated in buried fracture at a certain distance from the intrusion, which is a favorable spots for future deep ore prospecting.Highlights: Au resource was assessed in light of geological model which demonstrates tiny deviation (<10%) from reserve report; We speculate that there is a deep buried fracture in Wandongshan strike parallel to 40°(220°) which promise bright future for deep prospecting; The "double-sided method" is more suitable for complex layered precious metal modeling according to the outcome of orebody modeling in this paper. |
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| Keywords: | porphyry skarn gold copper deposits 3D geological modeling deposit visualization modeling application Jinsha river-Red river metallogenic belt mineral resources exploration engineering Beiya Yunnan Province |
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