摘要
胶南造山带经历了长期韧性变形作用的改造，形成以糜棱岩和变晶糜棱岩为代表的构造岩。两类构造岩形成的温压条件不同，岩石化学成分的变异特点及变异机制也存在显著的差异。通过对比构造岩变形前后岩石化学成分的变异特征，糜棱岩类构造岩的成分变异主要由体积的亏损引起（亏损率达５０％～６０％）；变晶糜棱岩类构造岩的成分变异除由较大的体积亏损（亏损率达５７．１％～７０％）之外，尚存在大量的渗流流体作用。
During a long time of deformative action in Jiaonan orogenic belt,tectonites of mylonites and blastomylonites were formed These two kinds of tectonites were fromed under the different conditions of temperatuer and pressure,so that their characters and mechanisms of variation of their chemical compositions are also different Through comparing the variations of chemical composition before and after deformation of tectonetes,it was found that the variation of chemical composition in mylonites was mainly deduced by volume loss(lost ratio reach to 50%￣60%),in contrast with that the variation of chemical composition in blastomylonites was deduced exceptly by volume loss (lost ratio reach to 57 1%￣70%),also by heavy petmeable fluid effect
出处
《矿物岩石》
EI
CAS
CSCD
北大核心
1998年第1期10-16,共7页
Mineralogy and Petrology
基金
国家自然科学基金
