摘要
采用扫描电镜(SEM)、超高压透射电镜(HTEM)及电子探针等手段研究了主高黎贡断裂带糜棱岩的显微构造特征,提出长石经历了碎粒流动和部分固态塑性流变过程;而石英晶粒经历了动态重结晶和静态回复阶段。认为高黎贡剪切带是在相当于高绿片岩相—低角闪岩相的变质条件下形成的,是晚第三纪右旋走滑活动的产物。
This paper deals with the microstructures of the mylonites in the Main Gaoligongshan fault zone by SEM, HTEM and EPMA. It is considered that the feldspar minerals in the mylonites have undergone cataclastic flow and partly solid plastic flow processes, whearas the quartz grains dynamic and steady state recrystallizatioon. The Main Gaoligong shear zone was formed under the metamorphic conditions equivalent to high greenshist to low amphibolite facies during the Neogene dextral strike slip movement.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第3期65-72,T001,共9页
Acta Petrologica Sinica
基金
国家自然科学基金<滇西古特提斯构造演化>
关键词
糜棱岩
显微构造
剪切带
Mylonite
Microstructure
Ductile shear zone: Main Gaoligongshan fault zone
