湘中雪家坡脆韧性剪切构造岩地球化学特征

详细信息

GEOCHEMICAL FEATURES OF BRITTLE-DUCTILE TECTONITE AT XUEJIAPO ,CENTRAL HUNAN

Regional Geological Survey,Hunan Bureau of Geology and Mineral Resources,Xiangtan,Hunan

摘要: 在１∶５万黄材幅区调中，对脆韧性剪切构造岩进行的岩石化学、微量元素、稀土元素研究表明，由中细粒含斑二云母二长花岗岩改造为糜棱岩化花岗岩、初糜棱岩、绢云母糜棱岩、硅化糜棱岩、千糜岩、糜棱片岩等，其化学成分发生了不同程度的改变。化学元素的分散、聚集或不变，既受原岩控制（继承性），又受变形强度和流体的成分、性质、活动性等控制（变化性）。
Abstract: The petrochemical and trace element and rare earth element geochemical features of brittle ductile tectonite were studied during the 1∶50 000 scale regional geological survey of the Huangcai Sheet.The study indicates that,when medium fine grained porphyritic two mica monzonitic granites are modified into mylonitized granite,protomylonite,sericite mylonite,silicified mylonite,phyllonite and mylonite schist,their chemical composition changes to different degrees.The dispersion,accumulation or stability of chemical elements are controlled not only by the protoliths （inheritance）but also by the deformation intensity of the composition, properties and mobility of the fluids（variability）.
- brittle ductile shear zone /
- tectonite /
- geochemical characteristics