Structure of different types of coal metamorphism by HTEM  

作　　者：LI Xiaoming CAO Daiyong LIU Demin 

机构地区：[1]College of Safety Engineering, North China Institute of Science and Technology, Beijing 101601, China [2]College of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China

出　　处：《Mining Science and Technology》2010年第6期835-838,共4页矿业科学技术（英文版）

基　　金：support for this work, provided by the National Natural Science Foundation of China (No40872105);the Scientific Research Foundation of the North China Institute of Science Technology (NoA08002)

摘　　要：In order to discuss the effect of tectonic stress on the structural evolution of coal, given the importance attached to High-resolution Transmission Electron Microscopy (HTEM), we investigated several aspects of material structures of high-rank Carboniferous period coal, located in the northern foreland basin of the Dabie orogenic belt in eastern China. High powered crystal lattice images of Bright Fields (BF) and Selected Area Diffraction patterns (SAD) of different types of metamorphism in coal were obtained. The results show that the Basic Structural Units (BSU) become increasingly more compact as a function of rising tem-perature and pressure. Under pressure, the local orientation of molecules is strengthened, the arrangement of BSU speeds up and the degree of order is clearly enhanced.In order to discuss the effect of tectonic stress on the structural evolution of coal, given the importance attached to High-resolution Transmission Electron Microscopy （HTEM）, we investigated several aspects of material structures of high-rank Carboniferous period coal, located in the northern foreland basin of the Dabie orogenic belt in eastern China. High powered crystal lattice images of Bright Fields （BF） and Selected Area Diffraction patterns （SAD） of different types of metamorphism in coal were obtained. The results show that the Basic Structural Units （BSU） become increasingly more compact as a function of rising tem- perature and pressure. Under pressure, the local orientation of molecules is strengthened, the arrangement of BSU speeds up and the degree of order is clearly enhanced.

关 键 词：Dabie orogenic belt high-rank coal high-resolution transmission electron microscopy tectonic stress 

分 类 号：P618.130.2[天文地球—矿床学] TQ531[天文地球—地质学]