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Facies dependence of the mineralogy and geochemistry of altered volcanic ash beds: An example from Permian-Triassic transition strata in southwestern China

VolcanologyEngineeringIgneous PetrogenesisGeologyMineral DepositGeochemistryPermian-triassic Transition StrataSouthwestern ChinaMesozoic TectonicsEarth ScienceFacies Dependence