长江中下游成矿带陆内斑岩型矿床的成岩成矿作用

周涛发, 王世伟, 袁峰, 范裕, 张达玉, 常印佛, Noel C WHITE. 长江中下游成矿带陆内斑岩型矿床的成岩成矿作用[J]. 岩石学报, 2016, 32(2): 271-288.
引用本文: 周涛发, 王世伟, 袁峰, 范裕, 张达玉, 常印佛, Noel C WHITE. 长江中下游成矿带陆内斑岩型矿床的成岩成矿作用[J]. 岩石学报, 2016, 32(2): 271-288.
ZHOU TaoFa, WANG ShiWei, YUAN Feng, FAN Yu, ZHANG DaYu, CHANG YinFo, Noel C WHITE. Magmatism and related mineralization of the intracontinental porphyry deposits in the Middle-Lower Yangtze River Valley Metallogenic Belt[J]. Acta Petrologica Sinica, 2016, 32(2): 271-288.
Citation: ZHOU TaoFa, WANG ShiWei, YUAN Feng, FAN Yu, ZHANG DaYu, CHANG YinFo, Noel C WHITE. Magmatism and related mineralization of the intracontinental porphyry deposits in the Middle-Lower Yangtze River Valley Metallogenic Belt[J]. Acta Petrologica Sinica, 2016, 32(2): 271-288.

长江中下游成矿带陆内斑岩型矿床的成岩成矿作用

  • 基金项目:

    本文受国家自然科学基金项目(41320104003、41172086、41172084、40830426)、中国地质调查局地质调查工作项目(1212011121115、1212011220243、12120114039701)、国家"深部探测技术与实验研究专项计划"专题(SinoProbe-03-02-05)和安徽省公益性地质工作项目(2011-20)联合资助.

Magmatism and related mineralization of the intracontinental porphyry deposits in the Middle-Lower Yangtze River Valley Metallogenic Belt

  • 陆内环境斑岩型矿床的发现对斑岩成矿理论的完善具有重要意义。长江中下游成矿带作为中国东部重要的陆内成矿带之一,成矿带内发育多个重要的斑岩型矿床,如铜山口Cu-Mo矿床、鸡冠嘴Cu-Au矿床、白云山Cu矿、城门山Cu-Mo矿床、武山Cu-Mo矿床、丰山洞Cu-Au矿床、丁家山Cu矿、洋鸡山Au矿、沙溪Cu-Au矿床、冬瓜山Cu-Au矿床、舒家店Cu矿床和安基山Cu矿床等。本文选取成矿带内典型的、具有代表性的斑岩型矿床,对其地质特征(地层、构造、含矿斑岩、脉体特征和围岩蚀变)、成岩成矿年代、成矿岩体的岩石化学和成岩成矿地球化学等方面的研究资料和成果进行了系统总结,讨论和试图阐明长江中下游成矿带陆内斑岩型矿床的成岩成矿作用与成矿模式。研究显示,长江中下游成矿带形成于燕山期陆内造山过程,成矿斑岩岩浆活动和成矿作用主要发生于149~105Ma之间,进一步可以分为早、中、晚三阶段:149~135Ma、133~125Ma和123~105Ma,三阶段岩浆活动和成矿作用主要发生于成矿带中的断隆区,早阶段(149~135Ma)和晚阶段(123~105Ma)多为斑岩-矽卡岩型矿化,中阶段(133~125Ma)矿化为典型的斑岩型矿化。长江中下游成矿带内斑岩型矿床的含矿斑岩为高钾钙碱性-钙碱性系列岩石,大部分具有埃达克岩的地球化学特征,可能为源自富集地幔的岩浆和加厚下地壳部分熔融的岩浆混合的产物,源自富集地幔的基性岩浆对成矿具有至关重要的作用,它的混入使得混合岩浆富水、硫和金属(Cu、Au)等。进一步通过与岩浆弧环境的斑岩型矿床对比研究发现,长江中下游成矿带斑岩型矿床一般不发育高级泥化岩帽(advanced argillic liithocaps)以及浅部的高-中硫矿化蚀变系统,含矿岩浆源区性质和成矿物质来源等与岩浆弧环境的斑岩型矿床明显不同。
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出版历程
收稿日期:  2014-10-30
修回日期:  2015-03-27
刊出日期:  2016-02-29

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