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胶东昆嵛山二长花岗岩副矿物成因矿物学研究
引用本文:陈光远,孙岱生.胶东昆嵛山二长花岗岩副矿物成因矿物学研究[J].现代地质,1996,10(2):175-186.
作者姓名:陈光远  孙岱生
作者单位:China University of Geosciences,Beijing,100083
摘    要:根据胶东昆嵛山二长花岗岩主要的副矿物组合(磁铁矿、榍石、绿帘石、褐帘石、磷灰石、锆石及自然金等)及相应的含量,结合有关矿物的形态、成分,特别是326粒锆石群形态学的研究,对岩石成因与金矿化的关系等,提出了矿物学标志。确定昆嵛山岩体为岩浆成因,岩浆物质来源为胶东群部分重熔,物质组成以壳源为主,为Ⅰ型磁铁矿系列花岗岩类;确定岩体结晶温度跨度大,因而富含水分,岩体富含S及其他挥发分,富含碱质,早期矿物结晶处于较氧化碱性环境,以上条件对形成金矿有利。对胶东三大主要含金岩体,即昆嵛山、郭家岭及玲珑岩体副矿物特点进行了对比。

关 键 词:胶东,昆嵛山二长花岗岩,副矿物,锆石群形态学,岩石成因,含金性

TYPOMORPHIC SIGNIFICANCE OF ACCESSORY MINERALS OF GOLD-HOSTING KUNYUSHAN MONZONITIC GRANITE IN JIAODONG,CHINA
Chen Guangyuan, Sun Daisheng,Shao Yue.TYPOMORPHIC SIGNIFICANCE OF ACCESSORY MINERALS OF GOLD-HOSTING KUNYUSHAN MONZONITIC GRANITE IN JIAODONG,CHINA[J].Geoscience——Journal of Graduate School,China University of Geosciences,1996,10(2):175-186.
Authors:Chen Guangyuan  Sun Daisheng  Shao Yue
Abstract:n the basis of the association of accessory minerals of Kunyushan monzonitic granite in Jiaodong including magnetite, titanite, epidote, allanite, apatite, zircon, native gold,pyrite and other sulfides together with their morphology and composition as well as the typology study of 326 grains of zircon, the authors find that the monzonitic granite is magmatic and belongs I type granitoids of magnetite series generated from partial remelting of metavolcanics of the Late Archaean Jiaodong group with assimilation of metasediments of the Lower Proterozoic Jingshan group.It is rich in water as revealed by the range of crystallization temperature of zircon lasting from 900℃ to 600℃ and rich in sulfur as revealed by the presence of pyrite and other sulfides of base metals. It is also rich in other volatiles like F and Cl as revealed by the presence of fluorite and their content in biotite and rich in alkali as revealed by the presence of alkali in all accessory minerals and their content in the feldspars. The minerals of the early stage crystallized under high oxygen fugacity. All conditions mentioned above are favourable for the formation of gold deposits. The presence of native gold as the accessory minerals is the direct criterion to indicate the potentiality of hosting gold deposits.
Keywords:iaodong  Kunyushan monzonitic granite  accessory minerals  zircon topology  petrogenesis  gold mineralization  
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