Boron isotopic composition of fumarolic condensates from some volcanoes in Japanese island arcs

Details Boron isotopic composition of fumarolic condensates from some volcanoes in Japanese island arcs Boron isotopic composition of fumarolic condensates from some volcanoes in Japanese island arcs

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.2403n&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Issue 11, pp.2403-2406

Mathematics

Logic

5

Scientific paper

Boron samples from 40 fumarolic condensates from volcanoes in the Ryukyu arc (Satsuma Iwo-jima and Shiratori Iwo-yama) and the North-east Japan arc (Usu-shinzan, Showa-shinzan, Esan and Issaikyo-yama) all have 11 B / 10 B ratios close to 4.07. Higher values, from 4.09 to 4.13, were only observed in condensates from volcanoes in the southernmost end of the North-east Japan arc (Nasu-dake), the northern part of the Izu-Bonin arc (Hakone), and the North Mariana arc (Ogasawara Iwo-jima). These higher values suggest geological interaction of the magmas with sea-water enriched in 11 B.

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