| 花岗岩的成岩作用和形成环境——存在的问题和解决的途径 |
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| 引用本文： | 马昌前.花岗岩的成岩作用和形成环境——存在的问题和解决的途径[J].地质科技情报,1992(1). |
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| 作者姓名： | 马昌前 |
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| 作者单位： | 中国地质大学 武汉430074 |
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| 摘 要： | 本文针对当前花岗岩研究中存在的一些问题,结合笔者等近年来的工作,概述了进一步研究花岗岩成岩作用和形成环境的新思路。主要包括:(1)利用成分协变图,结合岩石包体成因类型的认识,探讨花岗岩化学演化进程;(2)在全面考察花岗岩的构造样式、岩石组合、岩浆演化和区域地壳不均一性基础上,分析花岗岩形成的构造背景。
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| 关 键 词： | 花岗岩 成岩作用 构造环境 成分协变图 包体分类 |
PETROGENESIS AND TECTONIC SETTING OF GRANITOIDS : PROBLEMS AND APPROACH |
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| Ma Changqian.PETROGENESIS AND TECTONIC SETTING OF GRANITOIDS : PROBLEMS AND APPROACH[J].Geological Science and Technology Information,1992(1). |
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| Authors: | Ma Changqian |
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| Abstract: | This paper reports the progress in current studies of petrogenesis and tectonic discrimination of granitoids. First, it is shown how the chemical evolution of granitoids can be discriminated by using two -component covariance plots, combined with the study of enclaves in the intrusion. Then enclaves are classified according to the relationship between them and the host rocks. The enclaves are divided into epienclave(epixenolith), inherited enclave(hypoxenolith) and syngenetic enclave, the last group comprises restitic, mingled, mixed, cumulate, derivative magmatic, immiscible and chilled border enclaves. Finally, four discrimination criteria of the relation between granitoids and tectonic evolution are suggested ; structural patterns and mode of emplacement, rock association, magma evolution and regional granitoid geochemistry. |
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| Keywords: | granitoids petrogenesis tectonic setting two-component covariance plots enclave classification |
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