高黎贡山岩群矽线黑云石英片岩岩相学特征及其意义  

PETROGRAPHIC AND MINERALOGICAL CHARACTERISTICS OF SILLIMANITE-BIOTITE-QUARTZ SCHIST INTHEGAOLIGONGSHAN ROCK GROUP

作　　者：田素梅 吴嘉林 刘军平 李序贵 李蓉 TIAN Su-mei;WU Jia-lin;LIU Jun-ping;LI Xu-gui;LI Rong(Yunnan Institute of Geological Survey,Kunming 650216;MNR Key Laboratory ofSanjiang Metallogeny and Resources Exploration and Utilization,Kunming 650051)

机构地区：[1]云南省地质调查院,云南昆明650216 [2]自然资源部三江成矿作用及资源勘查利用重点实验室,云南昆明650051

出　　处：《云南地质》2024年第S01期58-63,共6页Yunnan Geology

摘　　要：高黎贡山岩群其原岩及变质变形期次存在较大争议。本文以杨家寨岩组中矽线黑云石英片岩为研究对象,野外调查和显微镜下观察发现岩石中见劈理域和微劈石。微劈石内残留透镜状、岩条状早期绢云千枚岩和千枚状变质石英砂岩。推断岩石具两期面理构造,经历了三期热变质作用和三期变形作用。推测岩石变质演化过程:(砂质)泥岩→千枚岩→矽线黑云片岩、泥质石英砂岩→千枚状变质石英砂岩→矽线黑云石英片岩。为进一步研究高黎贡山岩群变形变质演化历史、原岩恢复提供重要的岩相学依据。Theprotolith and metamorphic deformation period of Gaoligongshan rock group are controversial.In this paper,the sillimanite-biotite-quartz schist in the Yangjiazhai Formation is taken as the research object.The cleavage domain and microlithon were found in the rock by field investigation and microscopic observation.Lenticular and striped early sericite phyllite and phyllitic metamorphic quartz sandstone remain in the microlithon.It is inferred that the rock has a two-stage foliation structure,and has undergone three stages of thermal metamorphism and three stages of deformation.It is speculated that the metamorphic evolution process of rock is as follows:(sandy)mudstone→phyllite→sillimanite-biotite schist,argillaceous quartz sandstone→phyllitic metamorphic quartz sandstone→sillimanite biotite quartz schist.The findings in this paper provide an important petrographic basis for further research on the deformation and metamorphic evolution history and the restoration of the original rocks of the Gaoligongshan rock group.

关 键 词：高黎贡山岩群 矽线黑云石英片岩 原岩 岩相学 云南保山 

分 类 号：P586[天文地球—岩石学]