Oxidation states of mid-ocean ridge basalt glasses

@article{Christie1986OxidationSO,
  title={Oxidation states of mid-ocean ridge basalt glasses},
  author={D. M. Christie and I. Carmichael and C. Langmuir},
  journal={Earth and Planetary Science Letters},
  year={1986},
  volume={79},
  pages={397-411}
}
Abstract Precise new analyses of ferrous and total iron for 78 hand-picked mid-ocean ridge basalt (MORB) glasses constrain the redox states of MORB magmas, and the systematics of those redox states with respect to geography and chemistry. The data indicate that MORB magmas at the point of eruption include some of the most reduced terrestrial lavas yet analyzed. Irrespective of their tectonic setting, geographic setting or chemical type, quench glasses from the outer surfaces of MORB lavas have… Expand
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One-atmosphere melting experiments are used to assess the role of clinopyroxene in producing the compositional variations observed in mid-ocean-ridge basalts (MORBs) from the North Atlantic. AnalogExpand
Primary differences in oxygen fugacity and depth of melting in the mantle source regions for oceanic basalts
Most abyssal basalt can be divided into two groups based on major and minor element compositions of the glassy rinds of pillow lavas. Crystal differentiation models cannot relate one group to theExpand
Petrogenesis of basalts from the FAMOUS area: Mid-Atlantic Ridge
Abstract Fresh basalt glasses most of which have Mg/(Mg + Fe 2+ ) of 0.66–0.72 from outcrops within 3 km of one other in the rift valley at the Project FAMOUS locality have been analyzed for major,Expand
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A well established data base exists for the oxidation-reduction (redox) states of basalts on the Earth and on the Moon; the former equilibrate along the fayalite-magnetite-quartz buffer curve, andExpand
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Abstract Consideration of geochemical data from basalts formed near major Atlantic and Pacific transform faults reveals two significant sets of observations. First, compared to basalts formed farExpand
Carbon and its isotopes in mid-oceanic basaltic glasses
Abstract Three carbon components are evident in eleven analyzed mid-oceanic basalts: carbon on sample surfaces (resembling adsorbed gases, organic matter, or other non-magmatic carbon speciesExpand
Compositional variation in normal MORB from 22°–25°N: Mid‐Atlantic Ridge and Kane Fracture Zone
Basalts collected by dredging between 23°N and 25°N include samples from the active spreading ridges, median valley walls, and older walls of the Kane Fracture Zone transform fault at about 24°N.Expand
An estimate of the juvenile sulfur content of basalt
Sulfur analyses by X-ray fluorescence give an average content of 107 ppm for 9 samples of fresh subaerially-erupted oceanic basalt and 680 ppm for 38 samples of submarine erupted basalt. ThisExpand
Influence of degassing on oxidation states of basaltic magmas
Intrinsic oxygen fugacity measurements on minerals from mafic rocks that cool at pressures greater than one atmosphere indicate that the Earth's interior is in a more reduced state than are theExpand
Compositional variations of young basalts in the Mid-Atlantic Ridge rift valley near lat 36°49′N
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