基于透射电镜的香肠构造流变计研究  

RESEARCH ON RHEOLOGY GAUGE IN PINCH-AND-SWELL STRUCTURE BY TEM

作　　者：樊春[1] 曾佐勋[1] Franz Neubauer 杨光明[3] Johann Genser 

机构地区：[1]中国地质大学地球科学学院 [2]萨尔茨堡大学地质与古生物系 [3]中国地质大学测试中心,湖北武汉430074

出　　处：《地质科技情报》2002年第4期41-44,共4页Geological Science and Technology Information

基　　金：国家自然科学基金资助项目(49972068)

摘　　要：采用透射电镜(TEM)对采自奥地利东阿尔卑斯和北京西山的香肠构造中的香肠体和相应基质的样品进行了超微构造分析。结果表明细粒基质中的位错密度较粗颗粒香肠体中的位错密度明显低很多。故认为香肠体的变形机制以位错蠕变为主,而基质的变形机制则以扩散蠕变为主。这从一个侧面为香肠构造流变计的这一假设提供了超微观研究的依据。The paper analyzes the supermicroscopic characters of some boudins and their relative matrices by means of transmission electron microscopy (TEM).The samples are collected from East Alps, Austria and Xishan, Beijing, China,respectively. The results indicate that the dislocation density of the matrix with smaller grains is lower than that of boudins with bigger grains. The authors suggest the dislocation creep is the main deformation mechanism in the boudins, and the diffusion creep is the main deformation mechanism in the matrix. This supplies a basis for the rheology gauge in pinchandswell structure.

关 键 词：透射电镜 香肠构造 位错密度 位错蠕变 扩散蠕变 阿尔卑斯山 西山 变形机制 

分 类 号：P542[天文地球—构造地质学]