| 云南个旧高松矿田花岗岩侵位形态复杂度与矿体产出定量评价 |
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| 关键词:Gejiu Gaosong ore-field emplacement morphological complexity ore-body occurrence correlation coefficient |
| 基金项目:自然资源部三江重点实验室开放课题项目(编号: ZRZYBSJSYS2021001);云南科技计划昆明理工大学“双一流”科技专项项目(编号: 202202AG050006);云南锡业股份有限公司校企合作项目(编号: GF-2021-14) |
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| Quantitative Evaluation of the Granite Emplacement Morphological Complexity and Ore-body Output in the Gaosong Ore Field, Gejiu Tin Polymetallic Deposit, Yunnan Province |
| The emplacement of Late Yanshanian Gejiu granite results in the formation of skarn-type and altered granite-type deposits. The occurrence of these deposits has a specific genetic relationship with the emplacement form of granite. In recent years, the continuous development of three-dimensional (3D) quantitative prediction methods has played a significant role in promoting the positioning and quantitative prediction of concealed ore bodies. Based on previous work, we first determined the overall distribution and burial depth of granite in the Gaosong ore field and the occurrence characteristics and metallogenic pattern of sulfide ore bodies in the contact zone. We then established high-precision 3D surface models of ore bodies and rock masses in the ore field in combination with tunnel logging and drilling databases. The area, gradient, and divergence coefficient were taken as the three-dimensional shape indicators of granite. Finally, we calculated the correlation coefficient between these indicators and the ore volume and grade of the ore bodies. We then quantitatively evaluated the relationship between the morphological complexity of emplaced granite and the occurrence of ore bodies. We argue that the complex granite shape is conducive to the formation of the ore bodies. The correlation was highest in the Gaofengshan ore section, followed by the Daqingdong ore section, and was weakest in the Axizhai ore section. In view of the abovementioned findings, we believe that the distribution of divergence coefficients is similar in the eastern depression zone of the footwall of the Lutangba fault and the uplift zone of Daqingdong, indicating that a particular prospecting potential. We developed a quantitative mineralization evaluation method based on 3D geological model information and correlation analysis technology. This method has certain guiding significance for the prediction of deep and peripheral concealed ore deposits of the same type of magmatic hydrothermal deposits during geological prospecting. |
| LU Lei,JIANG Xiao-jun,LIU Xiao,MAO Du,ZHENG Wei.2023.Quantitative Evaluation of the Granite Emplacement Morphological Complexity and Ore-body Output in the Gaosong Ore Field, Gejiu Tin Polymetallic Deposit, Yunnan Province[J].Acta Geoscientica Sinica,44(6):1076-1086. |
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