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

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。

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

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 SiO2, rich in Al2O3 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.