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Volcán Popocatépetl (Popo) is a Quaternary stratovolcano located 70 km SE of Mexico City in the Trans-Mexican Volcanic Belt. The summit crater of Popo is the site of recent ash eruptions, degassing bursts, and dacite-dome growth. Fresh pumice samples collected on the flanks of Popo contain sparse, very fine-grained, base- and precious-metal phases that crystallized from magmatic volatiles trapped...
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