地学前缘 ›› 2009, Vol. 16 ›› Issue (4): 320-325.

• 论文 • 上一篇    下一篇

大吉山钨矿控矿断裂系统复杂性

  

  1. 1中国地质大学 地质过程与矿产资源国家重点实验室, 北京 100083
    2中国地质大学(北京) 地球科学与资源学院, 北京 100083

  • 出版日期:2009-08-01 发布日期:2009-08-01
  • 作者简介:刘宁强(1980—),男,博士研究生,主要从事成矿作用动力学及复杂性研究。Email: lnqcug@yahoo.cn
  • 基金资助:

    中国地质大学(北京)地质过程与矿产资源国家重点实验室开放基金资助项目(GPMR200842)

Complexity of ore controlling fractures of Dajishan tungsten deposit.

  1. 1State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
    2School of Earth Sciences and Resources, China University of Geosciences (Beijing),Beijing 100083, China

  • Online:2009-08-01 Published:2009-08-01

摘要:

为了解大吉山钨矿控矿断裂系统发展演化的复杂性,对采自江西省全南县大吉山钨矿不同深度的样品进行岩石声发射实验,表明岩石声发射事件序列特征明显,一般经历发生、平静和突发3个过程;矿区断裂系统的发生与发展演化具有崩塌间断平衡的分形谱系结构,是极不连续的,其断裂过程的能量释放也是不连续的,随深度增加而变小,反映成矿作用发展过程。运用复杂性理论研究认为,断裂系统的发生与发展和成矿系统的演化具有相似的动力学特征,通过随机行为耦合而发生自组织、系统之间相互作用产生相干行为,进而达到协同同步化,跨越临界转变点,走向自组织临界性,二者均为成矿物质运动与时间、空间三者耦合与相互作用的结果。大吉山脉状钨矿的形成与控矿断裂系统的临界破裂及其串级崩塌间歇平衡的分形生长有着紧密的联系,即大吉山脉状钨矿床成矿模式遵循广义的“五层楼”成矿模式。

关键词: 关键词:断裂系统;声发射;阵发;崩塌间断平衡;成矿作用

Abstract:

To understand the complexity of the development and evolution of orecontrolling fracture system in Dajishan tungsten deposit, Quannan County, Jiangxi Province, we collected rock samples at different depth of deposit, and performed experiments on rock acoustic emission. The results showed that the sequence of rock acoustic emission events has a distinctive feature, and generally goes through three processes of occurrence, quiescence and burst. The onset and development of fracture system has a cascade of avalanchespunctuated equilibrium hierarchic fractal structure. The breaking process is extremely discontinuous in time, and the energy release in the process is also discontinuous and decreasing with depth, which reflects the development of mineralization. The author applies the theory of complexity to studying the orecontrolling fractures of the veintype tungsten ore deposits in Dajishan. The following conclusions were drawn. The dynamics of the onset and development of fracture system is similar to that of the oreforming system; that is, it consists of the selforganization arising from the coupling of random motion, the coherent behavior produced by interaction between subsystems, the realization of cooperative synchronization, the occurrence of critical transition point, and the attainment of selforganized criticality. All of them result from the coupling and interaction of physical movement of minerals, time and space. The formation of veintype tungsten ore deposit in Dajishan is closely related to critical rupture of orecontrolling fracture system and its avalanchespunctuated equilibrium cascade fractal growth, i.e., the metallogenic model of veintype tungsten ore deposit in Dajishan follows the generalized “fivestoreyed type” metallogenic model.

Key words:

Key words: fracture system; acoustic emission(AE); burst; avalanchespunctuated equilibrium; metallogenesis

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