Roberts, S.; Bach, W.; Binns, R. A.; Vanko, D. A.; Yeats, C. J.; Teagle, D. A. H.; Blacklock, K.; Blusztajn, J. S.; Boyce, A. J.; Cooper, M. J.; Holland, N.; McDonald, B. (2003): Contrasting evolution of hydrothermal fluids in the PACMANUS system, Manus Basin; the Sr and S isotope evidence. Geological Society of America (GSA), Boulder, CO, United States, Geology (Boulder), 31 (9), 805-808, georefid:2003-063130

Ocean Drilling Program (ODP) Leg 193 investigated two sites of hydrothermal activity along the crest of the Pual Ridge in the eastern Manus Basin. A site of low-temperature diffuse venting, Snowcap (Site 1188), and a high-temperature black smoker site, Roman Ruins (Site 1189), were drilled to depths of 386 and 206 m below seafloor (mbsf), respectively. Although the two sites are <1000 m apart, the (super 87) Sr/ (super 86) Sr and delta (super 34) S signatures of anhydrite recovered at both sites are very different. The data suggest a complex interplay among hydrothermal fluid, magmatic fluid, and seawater during alteration and mineralization of the PACMANUS (Papua New Guinea-Australia-Canada-Manus) system. These new results significantly expand the subsurface data on seafloor hydrothermal systems and may begin to explain the earliest processes of multistage mineralization and alteration history that typify ancient massive sulfide systems.
West: 151.4000 East: 151.4100 North: -3.4300 South: -3.4400
Expedition: 193
Site: 193-1188
Site: 193-1189
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Provider: SEDIS Publication Catalogue
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