| 湘西沃溪金锑钨矿床分形成矿动力学 |
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| 引用本文： | 谢焱石,谭凯旋,陈广浩.湘西沃溪金锑钨矿床分形成矿动力学[J].地学前缘,2004,11(1):105-112. |
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| 作者姓名： | 谢焱石 谭凯旋 陈广浩 |
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| 作者单位： | 1. 中国科学院,广州地球化学研究所,广东,广州,510640
2. 南华大学,建筑与资源环境学院,湖南,衡阳,421001 |
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| 基金项目： | 国家自然科学基金资助项目“地球化学和成矿体系中的非线性耦合与自组织”( 70 1710 5 7) |
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| 摘 要： | 随着分形理论的建立与发展 ,应用分形理论研究矿床分布及元素的分布与富集规律已经成为研究成矿作用的一个有力的新工具。文中对湘西沃溪金锑钨矿床金品位空间变化进行了分形与混沌吸引子分析 ,结果表明 ,该矿床金品位分布具有分形结构特征 ,并都呈双分形关系 ,分叉处的金品位与其平均品位相当 ,分维值可以指示成矿流体的运移方向。其金品位空间变化为混沌序列 ,在相空间维数为 8～ 1 0时 ,出现一个混沌吸引子 ,吸引子的维数变化于 1 .5 3～ 4 .72之间 ;表明其成矿流体的演化及金元素的沉淀富集成矿过程为混沌动力学过程 ,描述或控制本矿区金品位变化的独立变量至少需要 8～ 1 0个。总之 ,成矿物质的沉淀过程是一个复杂的非线性动力学过程 ,矿物在热液体系中通过构造应力、流体流动、流体岩石反应等之间的复杂非线性反馈作用 ,最终在合适部位沉淀下来 ,形成了各种具分形与混沌特征的矿床和品位分布
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| 关 键 词： | 金品位 分形 分维 混沌吸引子 成矿动力学 湘西沃溪金锑钨矿床 |
| 文章编号： | 1005-2321(2004)01-0105-08 |
| 修稿时间： | 2003年10月28 |
THE FRACTAL STRUCTURE OF GOLD-GRADE IN WOXI Au-Sb-W DEPOSIT IN NW HUNAN, CHINA:APPLICATION TO THE MINERALIZATION DYNAMICS |
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| XIE Yan-shi,TAN Kai-xuan,CHEN Guang-hao.THE FRACTAL STRUCTURE OF GOLD-GRADE IN WOXI Au-Sb-W DEPOSIT IN NW HUNAN, CHINA:APPLICATION TO THE MINERALIZATION DYNAMICS[J].Earth Science Frontiers,2004,11(1):105-112. |
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| Authors: | XIE Yan-shi TAN Kai-xuan CHEN Guang-hao |
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| Institution: | XIE Yan-shi~1,TAN Kai-xuan~2,CHEN Guang-hao~1 |
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| Abstract: | Along with the arising and developing of fractal theory, it has become a new powerful tool for the study of mineralization through the fractal analyses of distribution of deposits and elements. In this paper, the fractal analyses and the chaotic attractor computations of spatial variation of Au grade of Woxi Au-Sb-W deposit in NW Hunan Province have been done. It indicates that the distribution of Au grade has a fractal structure and shows a bifractal relation. The Au grade at breakpoint is about equal to the average values of Au grade. The fractal dimension can denote the moving direction of ore-forming fluid. The spatial variation of Au grade shows a chaotic series. When the phase space dimension approaches 8～10, a chaotic attractor appears and its dimension varies from 1.53 to 4.72. It suggests that the evolution of ore-forming fluid and the enrichment and deposition of Au element is a chaotic dynamic process and it needs at least 8～10 independent parameter to control the variation of Au grade of Woxi Au-Sb-W deposit in NW Hunan Province. In general, the mineral deposition is a complex nonlinear dynamic process. Minerals in hydrothermal system will finally deposit at appropriate place through a complex nonlinear feedback effect among the structural stress, fluid flow and fluid-rock reaction and lead to the fractal and chaotic characteristics of deposits and grade distribution. |
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| Keywords: | gold grade fractal fractal dimension chaotic attractor mineralization dynamics Woxi Au-Sb-W deposit in NW Hunan Province China |
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