2. Data Report: Petrology and Geochemistry of Fresh, Recent Dacite Lavas at Pual Ridge, Papua New Guinea, from an Active, Felsic-Hosted Seafloor Hydrothermal System1

D.J. Miller,2 D.A. Vanko,3 and H. Paulick4

ABSTRACT

Leg 193 was the fourth Ocean Drilling Program expedition focusing on understanding subseafloor hydrothermal systems. This program was the first to combine studies of the volcanology, structure, hydrology, mineralization, and microbiology of a subseafloor hydrothermal system hosted by felsic rocks by coring at the PACMANUS hydrothermal field in the Manus Basin, Papua New Guinea. The study examines only the petrology and bulk rock and mineral chemistry of the freshest and most morphologically youthful lava flows recovered from the shallowest drill cores at the four sites occupied during Leg 193. There are subtle but distinct petrographic and geochemical variations between the closely spaced sites.

1Miller, D.J., Vanko, D.A., and Paulick, H., 2006. Data report: Petrology and geochemistry of fresh, recent dacite lavas at Pual Ridge, Papua New Guinea, from an active, felsic-hosted seafloor hydrothermal system. In Barriga, F.J.A.S., Binns, R.A., Miller, D.J., and Herzig, P.M. (Eds.), Proc. ODP, Sci. Results, 193: College Station, TX (Ocean Drilling Program), 1–31. doi:10.2973/odp.proc.sr.193.208.2006

2Integrated Ocean Drilling Program, Texas A&M University, 1000 Discovery Drive, College Station TX 77845-9574, USA. miller@iodp.tamu.edu

3Department of Physics, Astronomy, and Geosciences, Towson University, 8000 York Road, Towson MD 21252-0001, USA.

4Mineralogisches und petrologisches Institut, Universitšt Bonn, Poppelsdorfer Schloss, 53115 Bonn, Germany.

Initial receipt: 16 October 2003
Acceptance: 16 July 2006
Web publication: 27 November 2006
Ms 193SR-208

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