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Structure of different types of coal metamorphism by HTEM 被引量:6

Structure of different types of coal metamorphism by HTEM
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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.
出处 《Mining Science and Technology》 EI CAS 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)
关键词 Dabie orogenic belt high-rank coal high-resolution transmission electron microscopy tectonic stress 煤变质作用 结构单元 类型 高分辨透射电子显微镜 构造应力作用 大别山造山带 构造演化 中国东部
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