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Sanidine megacrysts occur in a number of dacite lava domes of young volcanic edifices in the Central Andes of Northern Chile. Trace element variations within a sanidine crystal erupted in a 14.1±1.4 ka old dacite lava dome from Taapaca volcano are studied here to decipher its crystal growth chronology using trace element diffusion systematics. The trace element concentration profiles were determined...
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