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Mineralogical and compositional characteristics of Late Permian coals from an area of high lung cancer rate in Xuan Wei, Yunnan, China: Occurrence and origin of quartz and chamosite

Xuan WeiLate Permian CoalsCompositional CharacteristicsEngineeringCoal BasinGeologyMineral DepositGeochemistrySedimentary PetrologySedimentologyPetrologyMineral Geochemistry