摘要
与碱性岩有关的斑岩型铜金矿床具有较高的经济价值,是矿床学研究的热点。本文以位于澳大利亚拉克兰造山带东带内的与碱性岩有关的卡迪亚里奇韦斑岩型铜金矿床为例,通过研究该矿床的地质特征,总结出该矿床的成矿岩体为富碱富钾的钾玄质中性侵入岩,矿床矿化类型以石英脉型为主,钾化蚀变发育且与主矿化期的关系密切。对比认为该矿床在构造背景、矿化蚀变、成矿元素、矿化类型等方面与典型的斑岩型铜金矿床有显著差别。通过区域对比,总结该类矿床的主要控矿因素,认为该类铜、金矿床在我国东部地区也具有较好的找矿前景。
Alkaline-related gold-copper deposit has been gradually becoming a highlight in the research domain of ore deposit geology for its high economic value. Cadia-Ridgeway porphyry gold-copper deposit that located in the eastern Lachlan fold belt in Eastern Australia, is a typical alkaline intrusive rocks-related porphyry deposit. Focusing on its geology and metallogenetic characteristics, we identified that the metallogenetic rock body in the ore deposit is alkaline-rich and potassic-rich shoshonitic intermediate intrusive rocks with quartz vein as the major mineralization type, and the well development of potassic alteration is closely associated with major mineralization stages. The alkaline rocks-related copper and gold deposits showed significant distinction from the typical porphyry deposits in the tectonic setting, alteration, metallogenetic elements and mineralization type. In combination with regional contrast, we concluded the major ore-controlling factors in the ore deposits and proposed a favorable ore-searching prospect in eastern China.
出处
《中国西部科技》
2015年第9期24-29,共6页
Science and Technology of West China
基金
中国地质调查局"西南太平洋重要成矿带矿床地质背景
成矿作用和找矿潜力研究"(项目编号:科[2014]04-021-015)资助
