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Mineralogy and geochemistry of a superhigh-organic-sulfur coal, Yanshan Coalfield, Yunnan, China: Evidence for a volcanic ash component and influence by submarine exhalation

Organic GeochemistryVolcanologyEngineeringEnvironmental MineralogySuperhigh-organic-sulfur CoalYanshan CoalfieldGeologySubmarine ExhalationGeochemical StudyGeochemistryPetrologyCoal BasinEarth ScienceOrganic PetrologyMineral Geochemistry