caa a22 4500 475825969 CHVBK 20180406123828.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1007/PL00008910 doi (NATIONALLICENCE)springer-10.1007/PL00008910 Lava bubble-wall fragments formed by submarine hydrovolcanic explosions on Lō'ihi Seamount and Kīlauea Volcano [Elektronische Daten] [David A. Clague, Alice S. Davis, James L. Bischoff, Jacqueline E. Dixon, Renee Geyer]  Glassy bubble-wall fragments, morphologically similar to littoral limu o Pele, have been found in volcanic sands erupted on Lō'ihi Seamount and along the submarine east rift zone of Kīlauea Volcano. The limu o Pele fragments are undegassed with respect to H2O and S and formed by mild steam explosions. Angular glass sand fragments apparently form at similar, and greater, depths by cooling-contraction granulation. The limu o Pele fragments from Lō'ihi Seamount are dominantly tholeiitic basalt containing 6.25-7.25% MgO. None of the limu o Pele samples from Lō'ihi Seamount contains less than 5.57% MgO, suggesting that higher viscosity magmas do not form lava bubbles. The dissolved CO2 and H2O contents of 7 of the limu o Pele fragments indicate eruption at 1200±300 m depth (120±30 bar). These pressures exceed that generally thought to limit steam explosions. We conclude that hydrovolcanic eruptions are possible, with appropriate pre-mixing conditions, at pressures as great as 120 bar. Springer-Verlag Berlin Heidelberg, 2000 Key words Lava bubble-wall fragments nationallicence Lō'ihi Seamount nationallicence Kīlauea Volcano nationallicence Clague David A. Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039-0628, USA e-mail: clague@mbari.org, US aut Davis Alice S. Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039-0628, USA e-mail: clague@mbari.org, US aut Bischoff James L. U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, USA, US aut Dixon Jacqueline E. Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA, US aut Geyer Renee Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA, US aut https://doi.org/10.1007/PL00008910 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00008910 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Clague David A. Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039-0628, USA e-mail: clague@mbari.org, US aut NATIONALLICENCE 700 1- Davis Alice S. Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039-0628, USA e-mail: clague@mbari.org, US aut NATIONALLICENCE 700 1- Bischoff James L. U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, USA, US aut NATIONALLICENCE 700 1- Dixon Jacqueline E. Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA, US aut NATIONALLICENCE 700 1- Geyer Renee Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer