福建高山矿区明矾石^(40)Ar/^(39)Ar定年及其对寿山石成矿时代的限定  

Alunite^(40)Ar/^(39)Ar Dating of Gaoshan Deposite,Fujian Province and Its Limitation of the Mineralization Age of Shoushan Stone

作　　者：李玉娟 陈润生 杨仲 林敏 刘文元[2] 汤建荣 LI Yujuan;CHEN Runsheng;YANG Zhong;LIN Min;LIU Wenyuan;TANG Jianrong(Fujian Institute of Geological Survey,Fuzhou 350013,China;Zijin School of Geology and Mining,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福建省地质调查研究院,福建福州350013 [2]福州大学紫金地质与矿业学院,福建福州350108

出　　处：《宝石和宝石学杂志（中英文）》2022年第5期44-54,共11页Journal of Gems & Gemmology

基　　金：福建省地勘科研费项目《寿山石成矿机制研究与科普文化推广项目》资助。

摘　　要：寿山石是中国传统“四大印章石”之一,为浅成热液型富铝系列非金属矿床,但其成矿时代并不清楚。利用微区激光加热技术对产于寿山早白垩世火山盆地内最具代表性的“高山石”(田黄的原石)矿区内,呈脉状产出的明矾石(充填型)进行了^(40)Ar/^(39)Ar年龄测定。结果显示,明矾石的坪年龄为122.56±0.95 Ma,对应的^(40)Ar/^(36)Ar-^(39)Ar/^(36)Ar等时线年龄为122.55±0.95 Ma,高山矿区明矾石记录的时间代表优质充填型地开石为主寿山石成矿年龄,约束了寿山石最晚期成矿年龄约在122 Ma,综合寿山石的成矿原岩-小溪组的形成时代在132~135 Ma,表明寿山石的成矿时代介于132~122 Ma之间。Shoushan stone is one of four traditional seal stones in China,which is an epithermal nonmetallic deposit,but the age of its mineralization is unclear.In this paper,the alunite^(40)Ar/^(39)Ar age of Gaoshan Shoushan stone deposite is determined by using the micro area laser heating technology.The plateau age of alunite is 122.56±0.95 Ma,and the corresponding^(40)Ar/^(36)-^(39)Ar/^(36)Ar isochron age is 122.55±0.95 Ma.The recorded time of alunite in Gaoshan mining area represents the ore-forming age of high-quality filling-type dickie of shoushan stone,and it represents that the latest metallogenic age of Shoushan stone is about 122 Ma.In combination with the age(132-135 Ma)of the volcanic rock,from Xiaoxi formation,which is the parent rock of Shoushan stone,it indicates that the metallogenic age of Shoushan stone should be 132-122 Ma.

关 键 词：寿山石 成矿年代学 明矾石 成因研究 热液矿床 

分 类 号：TS93[轻工技术与工程]