| A型花岗岩研究进展与问题讨论 |
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| 引用本文： | 周宇章.A型花岗岩研究进展与问题讨论[J].安徽地质,2011,21(3):169-175. |
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| 作者姓名： | 周宇章 |
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| 作者单位： | 安徽省公益性地质调查管理中心,安徽合肥,230001 |
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| 摘 要： | 自"A型花岗岩"的概念提出以来,经过30年的研究,有关"A型花岗岩"的岩石类型、构造环境、岩浆来源及成因等的定义与认识都发生了很大变化,目前"A型花岗岩"有扩大化现象,不少所谓的"A型花岗岩"已与A型花岗岩的原始定义相去甚远,并可能有逐渐发展为"拉张环境下形成的花岗岩都属A型花岗岩"的趋势。笔者通过资料调研和对比研究,认为"A型花岗岩"的确定需回归其原始定义,注意强调其"3A"特征,在此基础上才能正确探讨岩浆成因及其构造指示环境。
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| 关 键 词： | 问题讨论 A型花岗岩 |
Progress made in A-type granite study and discussion on some issues |
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| ZHOU Yu-zhang.Progress made in A-type granite study and discussion on some issues[J].Geology of Anhui,2011,21(3):169-175. |
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| Authors: | ZHOU Yu-zhang |
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| Institution: | ZHOU Yu-zhang(Public Geological Survey Center of Anhui Province,Hefei,Anhui 230001,China) |
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| Abstract: | Since the conception of A-type granite came into being 30 years ago,there has been a great change in definition and recognition of the rock type,structural setting,magmatic source and origin.Presently,A-type granite appears more inclusive,a number of so-called A-type granites differ greatly from the original definition and there seems to be an inevitable trend that all granites formed in extensional environment will be called A-type granites.Based on data research and comparative study,it is suggested that A-type granite determination should be strictly in line with its original definition with emphasis laid on the 3A features.Only on this basis can its magmatic origin and structural implications be discussed in a correct way. |
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| Keywords: | discussion on issues A-type granite |
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