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。
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.
出处
《地质科技情报》
CAS
CSCD
北大核心
1992年第1期29-34,共6页
Geological Science and Technology Information
基金
地质行业科学技术发展基金
国家自然科学基金资助项目
关键词
花岗岩
成岩作用
形成
环境
granitoids, petrogenesis, tectonic setting, two-component covariance plots,enclave classification
