[1] Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA
[2] Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA
[3] Univ Oregon, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA
[4] Univ Hawaii Manoa, Dept Earth Sci, Honolulu, HI 96822 USA
[5] Univ South Carolina, Sch Earth Ocean & Environm, Columbia, SC 29208 USA
[6] Univ Clermont Auvergne, Lab Magmas & Volcans, CNRS IRD OPGC, F-63170 Aubiere, France
[7] Woods Hole Oceanog Inst, Dept Marine Chem, Woods Hole, MA 02543 USA
[8] Lehigh Univ, Dept Biol Sci, Bethlehem, PA 18015 USA