| 广西大瑶山西北地区构造分形与成矿预测 |
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| 关键词:fractal and fractal dimension Fry fractal metallogenic prognosis |
| 基金项目:广西自然科学基金项目(编号: 2018GXNSFAA281260) |
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| Tectonic Fractal and Metallogenic Prediction in Northwest Dayao Mountain, Guangxi |
| This paper focuses on the characteristics of abundant faults and quartz vein type hydrothermal deposits in the northwest area of the Dayao Mountain and the problem as to whether there is a fractal boundary between the fault and the mineralization of hydrothermal deposits in this area. The fractal dimension analysis of fault structure with high scale (r=5～0.312 5 km) was to study the relationship between orebody attitude and fault attitude in the mining area, and the metallogenic potential of the area was comprehensively predicted by Fey analysis. The fractal dimension of the fault structure in the study area D=1.689 7, the fractal dimension value of NS-trending fault structure D=1.294 7, the fractal dimension value of NS-trending fault structure D=1.459 3, the fractal dimension value of EW-trending fault structure D=1.025 0, and the fractal dimension value of NS-trending fault structure D=1.200 3. It is held that there is a fractal boundary between fault structure and mineralization of the hydrothermal deposit in the study area, the fractal boundary of tectonic mineralization in the study area is D=1.500 0～1.800 0, the dividing line of lead-zinc mine tectonic mineralization is D=1.600 0～1.740 0, the dividing line of copper mine tectonic mineralization is D=1.500 0～1.700 0, the dividing line of gold mine tectonic mineralization is D=1.640 0～1.800 0, and the dividing line of barite tectonic mineralization is D= 1.600 0～1.740 0. The orebody pattern is strictly controlled by faulting tectonics. The NE-trending and NS-trending faulting tectonics seem to be the main ore-hosting structure. Based on comprehensive analysis, it is considered that copper deposits are distributed in the north-east direction, whereas gold deposits and lead-zinc deposits are generally distributed in the north-south direction in this area. According to the characteristics of mineral distribution, the authors delineated six metallogenic prediction targets. |
| JIANG Chao,LI She-hong,FU Song,XIE Zhuo-lin,LIAO Hong-wei.2021.Tectonic Fractal and Metallogenic Prediction in Northwest Dayao Mountain, Guangxi[J].Acta Geoscientica Sinica,42(4):514-526. |
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