Effects of fluid boiling on Au and volatile element enrichment in submarine arc-related hydrothermal systems

Jan J. Falkenberg,Manuel Keith,Karsten M. Haase,Wolfgang Bach,Reiner Klemd,Harald Strauss,Isobel A. Yeo,Kenneth H. Rubin,Bettina Storch,Melissa O. Anderson

Geochimica et Cosmochimica Acta（2021）

Cited 24|Views26

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Abstract

•Decoupling of volatile element enrichment and magmatic volatile influx.•Multiple sulfide generations with distinct trace element signatures.•Boiling-induced pyrite precipitation revealed by textures and Tl/Pb, Sb/Pb and Bi/Pb ratios.•Boiling-induced Au, electrum and Bi-telluride colloids lead to high Au grades.•Metals sources: shallow upflow- (60–80%) and deep reaction (20–40%) zone.

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Key words

Submarine hydrothermal systems,Black smoker,in-situ trace elements of pyrite, sphalerite and chalcopyrite,S and Pb isotopes,LA-ICP-MS,volatile and precious elements,Gold enrichment,Fluid boiling,Phase seperation,Tonga arc,boiling-induced trace element fraktionation,hydrothermal sulfides,Niua South,Niua volcano

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