摘要
每一地质环境都具有特定的岩浆－构造系列，对于花岗岩的类型与构造环境的关系一直是人们研究的热点之一。该文在综合同位素（Ｒｂ－Ｓｒ和Ｕ－Ｐｂ）和地球化学数据基础上，结合微观构造研究方法对康定西部沿鲜水河大型韧性平移剪切带分布的大型折多山花岗岩体的花岗岩类型及其相关的构造环境进行了细致的研究，并讨论了该岩体的侵位机制。研究表明，折多山花岗岩属地壳局部熔融产物，为Ｓ型花岗岩，它的侵位时间距今１２．８±１．４Ｍａ，是鲜水河大型韧性左行平移的同构造产物，并以不连续的方式侵位。
Syntectonic granite is an interesting topic. The Zheduoshan granite is a syntectonic granite located in the Xianshuihe fault zone. The characters of isotope (Rb Sr,U Pb) and petrochemical (such as REE) indicate that it is a S type granite, which was formed by partial melting of upper crust at 12 8±1 4 Ma. The syntectonic granite intruded during the deformation of the Xianshuihe fault zone, which began deforming at 15 Ma. The deformation has continued to now. Its character of deformation is coordinate with its country rocks.
出处
《成都理工学院学报》
CSCD
1997年第1期48-55,共8页
Journal of Chengdu University of Technology
基金
地质矿产部"八五"重大基础研究课题资助
关键词
花岗岩
成因
构造环境
syntectonic granite
tectonic setting
Xianshuihe fault zone
