Characteristics and the Tectonic Significance of Ashetuoque Monzonite Granite-Porphyfy in the Area between Suojia and Zhiduo,the East of Qiangtang
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摘要: 啊聂托确二长花岗斑岩体,岩石类型单一,其单颗粒锆石U-Pb年龄为126±3.8Ma,形成于早白垩世.低铝(Al2O3<15%),低钛,低钠,属轻稀土元素富集型,富集大离子亲石元素K,Ba,Rb,高场强元素Th,Nb,Ta,P,略显亏损,Ti,Y较强亏损.εSr(t)为107.6~80,εNd(t)为1.9~3.1.具有壳幔混合产物的特征.构造背景为火山弧花岗岩.
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