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C-O-H ratios of silicate melt inclusions in basalts from the Galapagos Spreading Center near 95 deg W - A laser decrepitation mass spectrometry studyRatios 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.
Document ID
19900033162
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yonover, Robert N.
(Hawaii Univ. Honolulu, HI, United States)
Sinton, John M.
(Hawaii, University Honolulu, United States)
Gibson, Everett K.
(NASA Johnson Space Center Houston, TX, United States)
Sommer, Michael A.
(Hawaii Univ. Honolulu, HI, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1989
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 53
ISSN: 0016-7037
Subject Category
Geophysics
Accession Number
90A20217
Funding Number(s)
CONTRACT_GRANT: NGT-12-004-801
CONTRACT_GRANT: NSF OCE-87-01118
CONTRACT_GRANT: NSF OCE-83-16547
Distribution Limits
Public
Copyright
Other

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