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Socorro Island, Mexico, still volcanically active, is an alkaline and peralkaline volcanic island in the eastern Pacific Ocean located on a mid-ocean ridge spreading center that was abandoned at ~3.5 Ma. Gas and water samples collected on the island in 1999 from the dome fumaroles and hot springs of Everman volcano have been analyzed for major components, H-O-C-S, He and Ar isotopic composition, and...
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