CAJ | 학술논문

应用分形理论原理,采用盒维数法计算了桂东南鸡笼顶金矿田断裂、矿床断裂及矿石和围岩的显微裂隙分维值,这些断裂和裂隙都有很好的统计自相似性.鸡笼顶矿田断裂分维值(1.66)大于桂东南金银成矿带断裂分维值和华南区域背景断裂分维值,分维值越大,成矿规模越大.但在鸡笼顶矿床标度区间,断裂分维值(1.39)明显小于区域背景断裂分维值,这缘于北东向断裂分维值大于北西向断裂分维,矿床仅受北东向断裂控制.鸡笼顶③号矿体中矿石显微裂隙和围岩显微裂隙的分维值都大于宏观断裂分维值,结构更加复杂,含矿热液流体和断裂破碎带应力耦合作用更加强烈.矿石显微裂隙分维值(1.76)大于围岩显微裂隙分维值(1.68),分维值越大,构造蚀变作用越强,裂隙连通性越好,矿化和赋矿作用越强.显微裂隙分维值也是断裂破碎带矿化的重要定量指标之一.
응용분형이론원리,채용합유수법계산료계동남계롱정금광전단렬、광상단렬급광석화위암적현미렬극분유치,저사단렬화렬극도유흔호적통계자상사성.계롱정광전단렬분유치(1.66)대우계동남금은성광대단렬분유치화화남구역배경단렬분유치,분유치월대,성광규모월대.단재계롱정광상표도구간,단렬분유치(1.39)명현소우구역배경단렬분유치,저연우북동향단렬분유치대우북서향단렬분유,광상부수북동향단렬공제.계롱정③호광체중광석현미렬극화위암현미렬극적분유치도대우굉관단렬분유치,결구경가복잡,함광열액류체화단렬파쇄대응력우합작용경가강렬.광석현미렬극분유치(1.76)대우위암현미렬극분유치(1.68),분유치월대,구조식변작용월강,렬극련통성월호,광화화부광작용월강.현미렬극분유치야시단렬파쇄대광화적중요정량지표지일.
With fractal theory,the fault systems of Jilongding gold ore field in southeastern Guangxi are studied by using box-counting method.The results show that the ore field faults,deposit faults and micro-cracks in ore and wall rock possess statistical self-similarity characteristics in the scale extent studied (0.06 cm-20 km).The value of fault fractal dimension of Jilongding ore field(1.66)is greater than the value of faults in southeastern Guangxi metallogenic belt and the value of the background faults in South China.When the fractal dimension is greater,the gold mines are greater.But within the studied deposit (0.05-3.2 km),the fractal dimension(1.39)is smaller than the value of the background faults because the Jilongding gold depositis only controlled by the NE trending fault.The value of fractal dimension of micro-cracks in ore and wall rock are greater than the value of macroscopic fault.This means that the more complex structure of the micro-cracks,the stronger coupling between the ore-bearing hydrothermal fluids and structure stress in fracture zone.It is obvious that the value of the micro-cracks fractal dimension in the gold ore(1.76)is greater than the value of fractal dimension in the wall rock(1.68).The greater fractal dimension,the stronger structural alteration.With better fracture connectivity,the mineralization and ore bearing are better.Therefore the fractal dimension of micro-cracks is also one of the important quantitative indicators in mineralized fracture zone.