| 金矿立体地球化学探测模型与深部钻探验证 |
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| 关键词:geochemistry 3D geochemical pattern drilling verification deep-drilling exploration |
| 基金项目:国家重点研发计划项目“穿透性地球化学勘查技术”(编号: 2016YFC0600600) |
| 作者 | 单位 | E-mail | | 王学求 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | wangxueqiu@igge.cn | | 张必敏 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 于学峰 | 山东省地质科学研究院, 自然资源部金矿成矿过程与资源利用重点实验室,山东省金属矿产成矿地质过程与资源利用重点实验室 | | | 杨德平 | 山东省地质科学研究院, 自然资源部金矿成矿过程与资源利用重点实验室,山东省金属矿产成矿地质过程与资源利用重点实验室 | | | 夏勇 | 中国科学院地球化学研究所矿床地球化学国家重点实验室 | | | 谭亲平 | 中国科学院地球化学研究所矿床地球化学国家重点实验室 | | | 刘耀文 | 河南省地质矿产勘查开发局第一地质矿产调查院
河南省金银多金属成矿系列与深部预测重点实验室 | | | 张苏坤 | 河南省地质矿产勘查开发局第一地质矿产调查院
河南省金银多金属成矿系列与深部预测重点实验室 | | | 田密 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 刘汉粮 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 李瑞红 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 韩志轩 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 熊玉新 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 吴慧 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | | | 张宝云 | 自然资源部地球化学探测重点实验室, 中国地质科学院地球物理地球化学勘查研究所 | |
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| Three-dimension Geochemical Patterns of Gold Deposits:Implications for the Discovery of Deep-seated Orebodies |
| The research on geochemical exploration for deep-seated ore deposits in covered terrains is centralized on understanding of long-distance vertical migration of mineralization and associated elements and 3D geochemical patterns. This paper provides an insight into 3D metal dispersion patterns of the buried gold ore deposits by sampling drill core rocks and surface soils. The 3D geometric pattern of the alteration type gold deposit in Jiaodong shows that the highest values of Au, S and Hg are in good correlation with the gold orebody, suggesting that the fluids migrated during the process of gold minerlization formation along the hosting fault channels, whereas Au and Hg exhibit vertical anomalies from the deep-seated orebody to the surface, implying that the elements with vertical dispersion of fluids were permeable upwards through the microfractures or rock pores, as supported by finding nanometer-sized particles of gold in wall rock microfractures. The 3D geometric pattern of the Carlin-type gold deposits in Guizhou shows that high values of Au, As, Sb, Hg, Tl and S are enriched in unconformity, which controls the distribution of deep-seated layer-bedded gold orebody, whereas anomalies of Sb, Hg and Au occur at the surface, implying vertical migration through the microfractures of the wall rocks. The geochemical patterns provide predicting methodology for the deep-seated orebody. A deep-seated orebody was discovered in the depths of 2428~3234 m by followup drilling exploration in the soil covered locations of gold anomalies delineated by fine-fraction soil sampling at Wujiazhuang of Jiaodong. An orebody of Au-Ag-Pb-Zn at a depth of 1312 m was discovered by drilling exploration based on fault gouge sampling at Shanggong, Henan. A reserve of 203 tones of gold in the depths of 300~1500 m was discovered according to the targets delineated by geochemical sampling of fine-fraction soils at Shuiyindong of Guizhou Province. |
| WANG Xue-qiu,ZHANG Bi-min,YU Xue-feng,YANG De-ping,XIA Yong,TAN Qin-ping,LIU Yao-wen,ZHANG Su-kun,TIAN Mi,LIU Han-liang,LI Rui-hong,HAN Zhi-xuan,XIONG Yu-xin,WU Hui,ZHANG Bao-yun.2020.Three-dimension Geochemical Patterns of Gold Deposits:Implications for the Discovery of Deep-seated Orebodies[J].Acta Geoscientica Sinica,41(6):869-885. |
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