赣东北灵山岩体地球化学特征及成矿潜力  

Prospecting Potential and Geochemical Characteristics ofLingshan Granite, Northeastern Jiangxi

作　　者：潘世语 曾庆友 曾晓建 彭蜀涛 俞寒飞 PAN Shiyu;ZENG Qingyou;ZENG Xiaojian;PENG Shutao;YU Hanfei(Jiangxi Nonferrous Metal Geology and Mineral Resources Exploration and Exploitation Institute,Nanchang 330001,Jiangxi,China)

机构地区：[1]江西有色地质矿产勘查开发院,江西南昌330001

出　　处：《中国钼业》2025年第1期15-22,共8页China Molybdenum Industry

基　　金：国家矿产资源储量技术标准体系建设项目(CB2017-4-12);江西有色地质勘查局成矿区(带)地质专项研究项目(2019-6)。

摘　　要：灵山岩体位于松树岗钽铌矿的东侧,其主要岩性由细粒钠长岩、中-细粒黑云母花岗岩等组成。灵山岩体显示出高Si,富Al,富碱,贫Ca、Ti、Mg、P,铝饱合指数高的主量元素地球化学特征,稀土元素、微量元素则显示了稀土总量低,轻、重稀土之间分馏不明显,具强烈的Eu负异常,富集Rb、Cs、Ta、Th、U、Zr、Hf,亏损Ba、Sr、Ti的特征,显示灵山岩体为弱过铝质-过铝质钙碱性-高钾钙碱性A1型花岗岩。岩石的主、微量和稀土元素地球化学特征指示,灵山岩体可能形成于陆内岩石圈拉张的伸展环境,岩体中Nb2O5含量最高可达0.1%,则暗示了区内具有寻找富Nb稀有金属矿床的潜力。Lingshan granite which is located in the east side of Songshugang Ta-Nb deposit mainly consists of albite and biotite granite.The major elements of Lingshan granite show high SiO 2,rich in Al 2 O 3 and alkali,deleption of Ca,Ti,Mg,P and high A/CNK.The rare earth elements show low∑REE,no fractionation between light and heavy rare earth elements,and very strongly negative Eu anomalies.The trace elements are rich in Rb,Cs,Ta,Th,U,Zr,Hf,and depletion of Ba,Srand Ti.The geochemical cheracteristics of the granites show that they belog to weakly peraluminous-peraluminous calc-alkaline-high-potassium calc-alkalin A-type granite.The geochemical cheracteristics of the granites also indicate that they are probably formed in the intracontinental lithospheric extensional environment and the Nb 2 O 5 content of Lingshan granite can reach up to 0.1%which shows that there is a very promising prospcting potential for Nb-rich rare metal deposit in the area.

关 键 词：地球化学 成矿潜力 A型花岗岩 灵山 赣东北 

分 类 号：P595[天文地球—地球化学]