| 花岗岩成因研究的若干问题 |
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| 引用本文： | 吴福元,李献华,杨进辉,郑永飞.花岗岩成因研究的若干问题[J].岩石学报,2007,23(6):1217-1238. |
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| 作者姓名： | 吴福元 李献华 杨进辉 郑永飞 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,岩石圈演化国家重点实验室,北京,100029
2. 中国科学技术大学,地球和空间科学学院,壳幔物质与环境重点实验室,合肥,230026 |
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| 摘 要： | 花岗岩是大陆地壳的重要组成,是地质学研究的重要课题。本文对当前花岗岩研究中的几个重要问题进行了讨论,内容包括:(1)花岗岩的成因分类,(2)花岗岩浆起源的温度与压力条件,(3)结晶分异作用与花岗岩成分变化,(4)花岗岩成因与壳幔演化,(5)花岗岩形成的构造环境等。通过分析认为,高分异花岗岩成因类型的确定是比较困难的,在有些情况甚至不可能准确分类。花岗岩的锆饱和温度和锆石钛温度计可对花岗岩浆形成的温度提供重要信息,但花岗岩浆起源的压力条件确定相对困难。花岗岩主要形成于俯冲带或碰撞造山带后造山的拉张构造背景中,在这两种情况下,挥发份和热的加入可使地壳发生部分熔融而形成花岗岩。本文还对我国近年来花岗岩研究的进展情况做了概要性叙述,并就我国东部中生代花岗岩研究的近期突破问题进行了分析。
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| 关 键 词： | 花岗岩 成因分类 成因 中生代 中国东部 |
| 文章编号： | 1000-0569/2007/023（06）-1217-38 |
| 修稿时间： | 2007-02-12 |
Discussions on the petrogenesis of granites |
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| WU FuYuan,LI XianHu,YANG JinHui and ZHENG YongFei.Discussions on the petrogenesis of granites[J].Acta Petrologica Sinica,2007,23(6):1217-1238. |
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| Authors: | WU FuYuan LI XianHu YANG JinHui and ZHENG YongFei |
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| Institution: | 1. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Key Laboratory of Crust-Mantle Materials and Enviroments, Chinese Academy of Sciences ; School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | As a major component of continental crust,granites have been served as the most important subject in geology.Based on advancements obtained during past decades,this paper provides a comprehensive overview about the issues related to granitic formation.As for genetic types,the classifications between I-,S-and A-type granites are sometimes difficult,especially for those of highly fractionated rocks.It is stated that the concentrations of zirconium in whole-rock and titanium in zircon can be used to provided information on the temperature of partial melting and magma crystallization,but the pressure under which the source partially melted is hard to estimate.The granites are mostly occurred in the subduction zones and post-orogenic extensional settings,where the inputs of volatile and heat resulted in crustal partial melting of orogenic roots,and then the formation of granites.The traditionally used geochemical diagrams for the tectonic discrimination could not get right answer in most cases.This paper also presents a concise summary about the recent achievements of granitic study in China.Finally,potential breakthroughs for the Mesozoic granites in eastern China are explored. |
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| Keywords: | Granites Genetic type Petrogenesis Mesozoic Eastern China |
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