黔西北五指山地区铅锌矿床研究新进展:成矿带归属的启示
New advances in the study of Pb-Zn deposits in the Wuzhishan district of the northwestern Guizhou: enlightenment on the attribution of metallogenic belt
查看参考文献71篇
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文摘
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黔西北成矿区为川滇黔接壤矿集区的重要组成部分之一,但该地区以往未见有大型以上铅锌矿的报道。近些年来,贵州科技工作者在五指山地区取得重大的找矿突破,发现多个大中型铅锌矿床,提交铅锌金属资源量超过250万吨。为了使地质工作者更好地认识该矿田铅锌矿成矿作用,并为研究区及邻区找矿预测提供理论依据,本文系统总结五指山地区铅锌矿近些年的研究进展,并与川滇黔与湘西-黔东地区铅锌矿床从地质、地球化学以及成矿时代进行对比,尝试探讨五指山地区铅锌矿成矿带归属。地质和地球化学的综合研究表明,五指山地区的铅锌矿床的成矿物质主要来源于变质基底,水岩反应作用致使围岩贡献了少量的成矿物质,成矿流体具有多源性,主要为低温、中高盐度的卤水,可能混入少量的地层水,矿床成因类型属于MVT型铅锌矿床。年代学数据揭示,五指山地区铅锌矿成矿时代为(458.2±2.9) Ma,可能与武夷—云开陆内造山事件有关,暗示湘西—黔东地区同时代的铅锌成矿作用可能延伸到该地区。通过系统的地质和地球化学对比发现,五指山矿田内铅锌矿床与川滇黔接壤地区典型的铅锌矿床存在差异明显,而与湘西—黔东铅锌成矿带内典型矿床相似,故暂将其划分到该成矿带。 |
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其他语种文摘
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The northwestern Guizhou metallogenic zone is one of the important parts of the Sichuan-Yunnan-Guizhou (SYG) metallgenic province, though none of the large sized Pb-Zn deposit has been discovered before 2010. Recently, a breakthrough of the Pb-Zn exploration has been made in the Wuzhishan district by Guizhou geologists. Several large and/or median sized Pb-Zn deposits have been discovered in the area with over 2.50 Mt of newly increased Pb-Zn resources. In order to better understand the Pb-Zn mineralization in the Wuzhishan district and to provide a theoretical basis for ore exploration in the Wushishan and adjacent areas, in this paper, we have systematically reviewed recent advances in studies of Pb-Zn deposits in the Wuzhishan district made a comparison between Pb-Zn deposits in the the SYG and those in the Western Hunan-Eastern Guizhou (WHEG) district, China in terms of geology, geochemistry, and geochronlogy, and discussed the attribution of the Wuzhishan Pb-Zn metallogenic belt. Comprehensively geological and geochemical studies suggest that the ore-forming metals could be mainly derived from the metamorphic basement with a small contribution from host rocks due to the fluid-rock interaction. The ore-forming fluids could be mainly sourced from the low temperature medium-high salinity brines mixed with a small amount of formation water. All these Pb-Zn deposits should be ascribed to the MVT-type deposit. Additionally, geochronological dataset has revealed that the Pb-Zn mineralization of various deposits in the Wuzhishan, formed at 458.2±2.9 Ma, may be associated with the Wuyi-Yunkai intracontinental orogenic event, indicating the possible extention of the comtemporary Pb-Zn mineralization in the WHEG area. By systematically geological and geochemical comparison, it is found that the characteristics of Pb-Zn deposits in the Wuzhishan orefield are similar to those of the typical deposits in the WHEG Pb-Zn metallogenic belt, but are obviously different to those of the typical Pb-Zn deposits in the SYG triangle. Therefore, the Wuzhishan orefield is temporarily assigned to the WHEG me tallogenic belt. |
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来源
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矿物学报
,2020,40(4):394-403 【核心库】
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DOI
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10.16461/j.cnki.1000-4734.2020.40.028
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关键词
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川滇黔地区
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铅锌成矿作用
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成矿物质及流体来源
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成矿时代
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矿床成因
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地址
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中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵州, 贵阳, 550081
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中国科学院大学, 北京, 100049
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贵州省地质矿产勘查开发局贵州省地质调查院, 贵州, 贵阳, 550081
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语种
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中文 |
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文献类型
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综述型 |
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ISSN
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1000-4734 |
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学科
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地质学 |
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基金
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国家自然科学基金项目
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贵州省项目
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国家重点研发计划
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贵州省项目
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文献收藏号
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CSCD:6778279
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