湖南香花岭锡多金属矿田通天庙花岗岩体地球化学特征及成因  

Geochemical characteristics and genesis of Tongtianmiao granite in Xianghualing tin-polymetallic ore field,Hunan province

作　　者：潘世语 曾庆友 鲁诗阳 胡波 俞寒飞 彭蜀涛 PAN Shiyu;ZENG Qingyou;LU Shiyang;HU Bo;YU Hanfei;PENG Shutao(Jiangxi Nonferrous Metal Geology and Mineral Resources Exploration and Exploitation Institute,Nanchang 330001,China)

机构地区：[1]江西有色地质矿产勘查开发院,南昌330001

出　　处：《有色金属（矿山部分）》2024年第2期141-148,共8页NONFERROUS METALS(Mining Section）

基　　金：国家矿产资源储量技术标准体系建设项目(CB2017-4-12)。

摘　　要：通天庙花岗岩体位于南岭成矿带的香花岭锡多金属矿田西南部,通过对其开展地球化学分析研究表明,主量元素具有高硅、富铝、富碱、贫铁、贫镁、贫钛、高铝饱和指数的特点,稀土元素总量高,轻重稀土无明显分馏,Eu具极强的负异常,微量元素具有富高场强元素,大离子亲石元素,高10 000×Ga/Al,亏损Sr、Ba、Ti元素的特征,均与典型的A型花岗岩相似,说明通天庙花岗岩体应属于过铝质钙碱性-高钾钙碱性A型花岗岩,形成于造山后拉伸环境下,这一认识为了解通天庙花岗岩体成因及构造演化提供了理论依据。The Tongtianmiao granites are located in the southwestern part of Xianghualing tin-polymetallic ore field.Through a series of geochemical analysis,the major elements of the Tongtianmiao show high SiO 2,rich in Al 2O 3 and Alkali,deleption of Fe,Mg,Ti,and high A/CNK;The rare earth elements show high∑REE,no fractionation between light and heavy rare earth elements,and very strong negative Eu anomalies;the trace elements are rich in HFSE such as Nb、Ta、Zr、Hf、Th、U and LILE such as Cs、Rb,high 10000×Ga/Al,depletion of Sr、Ba and Ti,which are similar to the A-type granite.In conclusion,the Tongtianmiao granite are peraluminous calc-alkaline-high-potassium calc-alkalin A-type granite which is formed in the post-orogenic extensional environment,which provides the theoretical basis for the understanding of the genesis and tectonic evolution of the Tongtianmiao granite.

关 键 词：地球化学 花岗岩 通天庙 香花岭 湖南 

分 类 号：P595[天文地球—地球化学] TD164[天文地球—地质学]