投稿时间：2021-11-18
修订日期：2022-11-16
网络发布日期：2023-01-07
中文摘要:叶蜡石矿床是一种重要的非金属矿产，主要分布于东南沿海地区侏罗纪—白垩纪的中酸性火山岩地层中，受控于区域大规模断裂和伸展断陷盆地。文章对中国内外叶蜡石矿床的地质和矿产特征进行了综合分析，总结了浙闽地区叶蜡石矿床特征和成因。浙闽地区叶蜡石矿床的赋矿原岩为流纹质火山碎屑岩和凝灰岩等，具有高硅高铝的特点。矿床成因类型主要包括火山热液交代型和火山热液充填型。结合泰顺龟湖、青田周村和山口等典型叶蜡石矿床的实例研究，文章揭示了火山热液交代型叶蜡石矿床普遍发育硅化、叶蜡石化、明矾石化、黄铁矿化的垂直分带特征，中酸性火山岩组分在热液作用下发生交代、分解，使铝有规律的富集成矿；火山热液充填型叶蜡石矿床围岩蚀变分带不明显，从围岩中淋滤、萃取的硅铝组分沿着构造裂隙运移，在有利的空间成矿。因此，笔者认为侏罗纪—白垩纪中酸性火山岩与凝灰岩、区域断裂带和火山岩带、围岩蚀变垂直分带以及陡峭山峰是叶蜡石矿的重要找矿标志。
Abstract:The pyrophyllite deposit is an important non-metallic mineral. In China, it is mainly developed in the Jurassic-Cretaceous intermediate-acid volcanic strata along the Southeast coastal area, and the mineralization is controlled by the large-scale regional faults and extensional faulted basins. This study analyzed the geological and deposit features of the pyrophyllite deposits around the world, and summarized their mineralization mechanisms in the Zhejiang-Fujian area. The host rocks of the pyrophyllite deposits consist of rhyolitic volcaniclastic rocks and tuffs, which are characterized by high Si and Al contents. The pyrophyllite deposits can be divided into two types, including the volcanic hydrothermal metasomatic type and the filling type. According to the detailed case studies of the Guihu deposit in Taishun, Zhoucun and Shankou deposits in Qingtian, the volcanic hydrothermal metasomatic pyrophyllite deposits are characterized by vertical alteration zonings of silicification, pyrophyllitization, alunitization and pyritization which were formed by Al enrichment during the hydrothermal metasomatism of intermediate-acid volcanic materials. In comparison, the zoning patterns are absent in the volcanic hydrothermal filling pyrophyllite deposits, which were formed by enrichment and deposition of Si and Al during the hydrothermal fluid transportation along extensional faults. Therefore, the Jurassic-Cretaceous intermediate-acid volcanic rocks and tuffs, faults, vertical alteration zonings of the wall-rocks and steep mountain peaks are important indicators for exploring pyrophyllite deposits in southeastern China.
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基金项目:本文得到“浙江省叶蜡石矿资源远景调查评价”省资金项目（编号：[省资]2019006）和“浙江省青田县山口矿区外围叶蜡石矿普查”省资金项目（编号：[省资]2019001）联合资助
引用文本：
叶泽富,叶帆,缪仁谷,吴义,李伟,王磊,刘源,李奇维,赵军红.2022.浙闽地区叶蜡石矿床成矿规律研究[J].矿床地质,41(6):1258~1273YE ZeFu,YE Fan,MIAO RenGu,WU Yi,LI Wei,WANG Lei,LIU Yuan,LI QiWei,ZHAO JunHong.2022.Ore genesis of pyrophyllite deposit in Zhejiang-Fujian area[J].Mineral Deposits41(6):1258~1273
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