澳大利亚Cloncurry地区铁矿化岩石与铜金矿化的时空关系  

Spatial and temporal relations between ironstones and Cu-Au mineralization in the Cloncurry district,Australian

作　　者：张德贤[1,2] 戴塔根[2] 侯林慧[2] 马伟东[2] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083 [2]中南大学"有色金属成矿预测"教育部重点实验室,地球科学与信息物理学院,长沙410083

出　　处：《地质找矿论丛》2013年第3期448-453,共6页Contributions to Geology and Mineral Resources Research

基　　金：中南大学博士后基金;新疆中亚造山带大陆动力学与成矿预测实验室资金(编号:XJDX1102-2011-05);澳大利亚Xstrata-JCU-ARC Collaborative project资金联合资助

摘　　要：澳大利亚Cloncurry地区大部分被元古宙地层所覆盖,其中赋存有大量世界级的成矿热液系统。大型热液系统大都与含磁铁矿或赤铁矿等铁氧化物的铁矿化岩石密切相关。铁氧化物和铜金矿化的矿物学、地球化学及年代学特征反映出成矿过程可能涉及到多种流体间的作用和水岩反应。对Cloncurry地区典型矿床和区域Na-Ca热液系统的研究表明,含铁氧化物的铁矿化岩石与铜金矿化之间的关系可分为4类:①贫磁铁矿或赤铁矿的"Kiruna-型"铁矿化岩石;②铜金矿化赋存于含铁氧化物的铁矿化岩石中;③与铁氧化物有关的铜金矿化;④少量或者不含铁氧化物的铜金矿化。该分类提供了一些与铁氧化物有关的铜金矿化成因联系、矿物学和矿化类型信息。Cloncurry district is underlain by Proterozoic rocks in which many world-scale hydrothermal systems occur. The large hydrothermal systerms are closely associated with magnetite or hematite-bearing ironstone. Mineralogy, geochemistry and choronology of oxidation of iron and Cu, Au mineralization indi- cate that interaction of several fluids and different water/rock reractions during formation of the ores. Study on Na-Ca system of typical ore deposits and areas in Cloncurry district shows that relation of iron oxide-mineralized rock to Cu-Au minerlization can be divided into 4 types： （1） Kiruna type mineralization in which magnetite pr hematite is poor; （2） Cu,Au mineralizatrion occurs in Iron oxide mineralized rocks; （3） Cu, Au mineral; ization related to iron oxides; （4） Cu, Au mineralization with less iron oxides or without iron oxides. This classification reveals some genetic relation of Cu, Au mineralization to iron ox- ides and provides information about mineralogy and mineralization type.

关 键 词：Cloncurry地区铁矿化岩石 铜金矿化 时空关系 澳大利亚 

分 类 号：P588.32[天文地球—岩石学] P618.5[天文地球—地质学]