The application of FAMM (Fluorescence Alteration of Multiple Macerals) analyses for evaluating rank of Paraná Basin coals, Brazil |
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| Authors: | W Kalkreuth N Sherwood G Cioccari Z Corrêa da Silva M Silva N Zhong L Zufa |
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| Institution: | a Instituto de Geociências, Univ. Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, RS 91501-970, Porto Alegre, Brazil;b CSIRO Petroleum, P.O. Box 136, North Ryde, 1670 NSW, Australia;c Department of Geoscience, University of Petroleum, Chang Ping, Beijing 102200, PR China;d School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, PR China |
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| Abstract: | Combining vitrinite reflectance (VR) and fluorescence alteration of multiple macerals (FAMM) analyses provide insights into the chemical nature of vitrinites (i.e., perhydrous vs. orthohydrous vs. subhydrous compositions) in Permian Gondwana coals of the Paraná Basin, Brazil. The FAMM-derived equivalent VR (EqVR) values and relationships with VR can be determined according to calibration curves based largely on Permian Gondwana coals of eastern Australia.The analytical results indicate that vitrinites in the Paraná Basin coals studied generally range from orthohydrous to perhydrous, with interpreted VR suppression ranging up to 0.2% absolute for the most perhydrous case. The EqVR values of the Santa Catarina coals, which range from about 0.85% to 0.95% differ from VR values by about 0.10–0.15% absolute, potentially having significant implications on coal utilization.The causes of vitrinite reflectance suppression in the Paraná Basin coals are as yet poorly understood, but are likely to be related to a combination of factors. |
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| Keywords: | Author Keywords: Paraná Basin Brazil Permian coals Rank Fluorescence alteration of multiple macerals (FAMM) Vitrinite reflectance suppression |
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