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Geochemical characteristics and genesis of Mesozoic acid dikes in Miaoershan area
Pages: 337-344
Year: Issue:  6
Journal: Uranium Geology

Keyword:  中生代酸性脉岩地球化学壳源型岩石成因;
Abstract: 苗儿山地区中生代酸性脉岩主要为细粒白云母花岗岩和花岗斑岩,具有较高的Al2 O3、K2O、Na2O含量和较低的TiO2、MgO含量,微量元素以富集Rb、Th、U、Ta而亏损Ba、Sr为特征,稀土元素总量偏低,轻稀土富集,Eu亏损强烈.在CaO/Na2O - A12 O3/TiO2和Rb/Sr - Rb/Ba图解上,酸性脉岩具有上地壳富黏土质泥岩的特征.这些特征与豆乍山、香草坪等岩体的地球化学特征相...
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