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Journal of Geological Research
Volume 2012 (2012), Article ID 526016, 16 pages
Research Article

Applications of Vitrinite Anisotropy in the Tectonics: A Case Study of Huaibei Coalfield, Southern North China

1MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China
2Key Lab of Computational Geodynamics of Chinese Academy of Sciences and College of Earth Science, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
3Key Laboratory of Coal Resources, China University of Mining and Technology, Beijing 100083, China
4Key laboratory of Basin Structure and Petroleum Accumulation, CNPC and PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received 28 February 2012; Accepted 6 April 2012

Academic Editor: Hongyuan Zhang

Copyright © 2012 Yudong Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


29 oriented and 10 nonoriented coal samples are collected in the study from three different regions of the Huaibei coalfield, eastern China, and their vitrinite reflectance indicating surface (RIS) parameters are systematically calculated and analyzed. Using the available methods, Kilby’s transformations and RIS triaxial orientations are obtained. The magnitudes and orientations of the RIS axes of the three regions were respectively projected on the horizontal planes and vertical sections. The results show that the samples in high deformed region have significant anisotropy magnitudes (higher ??w/??max and ??am values) with a biaxial negative style, whereas the samples in the slightly deformed area have unimpressive anisotropy magnitudes with a biaxial negative style. Thermal metamorphism superposed might enhance the complication and variation of RIS style. RIS projection analysis deduced that the RIS orientation is mainly controlled by regional tectonic stress, and likely influenced by deformation mechanisms of coal.