易门式大型铜矿床构造成矿动力学模型  

A MODEL FOR DYNAMICS OF TECTONIC ORE FORMING PROCESSES FOR THE LARGE YIMEN TYPE COPPER DEPOSITS,YUNNAN

作　　者：韩润生[1] 刘丛强[2] 马德云[2] 王红才[3] 马更生[1] 

机构地区：[1]昆明理工大学,昆明650093 [2]中国科学院地球化学研究所矿床地球化学开放研究室,贵阳550002 [3]中国地质科学院地质力学研究所,北京100081

出　　处：《地质科学》2003年第2期200-213,共14页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：云南省青年自然科学基金项目 ( 97D0 0 9Q);科学技术部攀登计划预选资助项目 ( 95 预 39);云南省省院省校合作项目 ( 2 0 0 2 );中青年学术和技术带头人培养基金 ( 99D0 0 0 3G)联合资助。

摘　　要：针对金属矿床隐伏矿定位预测的关键问题 ,在提出构造成矿动力学的分支学术方向的基础上 ,以易门式大型铜矿床为例 ,从成矿地质背景、矿田构造、构造地球化学和成矿构造应力场等方面进行构造成矿动力学研究 ,阐述在构造应力场控制下成矿流体运移和聚集的规律。构造地球化学研究认为 ,构造地球化学异常反映矿体的原生晕 ;构造地球化学异常受构造控制 ,其分带特征可指示成矿流体的流向 ,并提供矿床成因和隐伏矿 (化 )体相对埋深的信息。构造应力场的控矿特征主要表现在 :构造应力场导致控矿构造的形成 ,并驱动成矿流体的运移 ;构造应力场控制了成矿能量场 ;应力和能量的高值集中区分布特点可反映某些构造型式。在此基础上建立构造成矿动力学模型 ,概括隐伏矿成矿预测准则 ,据此提出若干重点找矿靶区和靶位 ,其中部分靶区得到工程验证 ,表明构造成矿动力学方法对隐伏矿定位预测和评价具有重要的指导意义。On the basis of an academic branch, dynamics of tectonic ore forming processes, the Yimen type copper deposits were studied to solve an important problem of prognosis of concealed ores from ore field tectonics, tectono geochemistry, ore forming structural stress field,etc. The laws of migration and collection of metallogenic elements were expounded under the control of structural stress field. Our work showed the tectono geochemical anomaly field being obviously controlled by fault tectonic zones. The anomaly represented the primary halo of orebody (mineralization), and also the area where the mineralization was concentrated. The abnormalous zoning feature of tectono geochemistry was a reflection of direction of the ore forming fluid, and provided some information of ore deposit origin and relative buried depth of concealed ores.The characters of ore forming structural stress field could be summarized as follows. The stress field determining migration potential field was a reflection of the flow direction of ore forming fluid and the distribution scope of mineralization; the tectonic stress field controlled the deformation of ore field and energy fields of ore fluid, as well as the tectono geochemical field; the tectonic stress field also controlled the occurrence position of ore deposits. Based on what mentioned above, a model for dynamics of tectonic ore forming processes was set up. The criterions of metallogenic prognosis were summarized,and the important target areas put forward by the orientation prognosis of concealed ores. Some of the targets being tested and verified by the practice, indicated an important guiding significance for the orientation prognosis and appreciation of concealed ores of the Yimen type ore field and the other metallic deposits controlled by structure.

关 键 词：铜矿床 构造成矿动力学 成矿地质背景 构造地球化学 构造应力场 成矿流体 找矿方向 成矿作用 

分 类 号：P618.41[天文地球—矿床学]