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A型花岗岩的实质是什么?
引用本文:张旗,冉皞,李承东.A型花岗岩的实质是什么?[J].岩石矿物学杂志,2012,31(4):621-626.
作者姓名:张旗  冉皞  李承东
作者单位:1. 中国科学院地质与地球物理研究所,北京,100029
2. 中国地质大学地球科学与资源学院,北京,100083
3. 中国地质调查局天津地质矿产研究所,天津,300170
基金项目:国家自然科学基金重大研究计划资助项目(91014001,90714007,90714011)
摘    要:A型花岗岩是富碱、贫水的花岗岩类,地球化学上以贫Al、Sr、Eu、Ba、Ti、P为特征,形成于低压高温条件下,对源岩没有选择。A型花岗岩的实质为:在低压下部分熔融形成的花岗岩类,大多产于地壳伸展减薄的构造背景中。

关 键 词:A型花岗岩  实质  低压  构造背景

A-type granite: what is the essence?
ZHANG Qi , RAN Hao , LI Cheng-dong.A-type granite: what is the essence?[J].Acta Petrologica Et Mineralogica,2012,31(4):621-626.
Authors:ZHANG Qi  RAN Hao  LI Cheng-dong
Affiliation:1.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;2.Faculty of Geosciences and Resources,China University of Geosciences,Beijing 100083,China;3.Tianjin Institute of Geology and Mineral Resources,China Geological Survey,Tianjin 300170,China)
Abstract:A-type granites are alkali-rich and water-poor granitoids characterized geochemically by poor Al,Sr,Eu,Ba,Ti and P.A-type granite was formed under the low pressure and high temperature conditions,and their source rocks had no choice.The essence of the A-type granites is that granitic magma melted under low pressure,and they were mostly produced in the tectonic setting of crustal extension and thinning.
Keywords:A-type granite  essence  low pressure  tectonic setting
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