C-O-H ratios of silicate melt inclusions in basalts from the Galapagos Spreading Center near 95 deg W - A laser decrepitation mass spectrometry study

Details C-O-H ratios of silicate melt inclusions in basalts from the Galapagos Spreading Center near 95 deg W - A laser decrepitation mass spectrometry study C-O-H ratios of silicate melt inclusions in basalts from the Galapagos Spreading Center near 95 deg W - A laser decrepitation mass spectrometry study

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53.3145y&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 53, Dec. 1989, p. 3145-3154.

Computer Science

2

Basalt, Laser Spectroscopy, Mass Spectra, Carbon Dioxide, Chemical Composition, Glass Lasers, Neodymium Lasers, Volatility, Water Vapor

Scientific paper

Ratios of C, O, and H dissolved in silicate glass inclusions and pillow rind glasses in samples from the Galapagos Spreading Center near 95 deg W were analyzed (using laser volatilization and mass spectrometry), and the data were assessed in terms of mantle source compositions, oxygen fugacity, kinetic fractionation, and magmatic degassing. It was found that glass inclusions in the Galapagos failing rift lavas are higher and more variable in CO2/H2O (about 0.641) relative to inclusions in propagating rift lavas (about 0.245). This difference is considered to reflect different degrees of degassing during contrasting magmatic histories of the two regions.

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