Results 151 to 160 of about 72,842 (206)
MORB chemistry along the super fast spreading EPR
Bach, W., Erzinger, J.
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A geochemically consistent hypothesis for MORB generation
Chemical Geology, 2000Abstract Geochemical observations of MORB including U-series disequilibria are used to examine the processes and timescales of MORB melt generation. Incompatible elements in MORB suggest that the MORB source region consists of a depleted lherzolite matrix interspersed with chemically enriched mafic veins.
C.C Lundstrom, J Gill, Q Williams
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Chemical variations and regional diversity observed in MORB
Chemical Geology, 2010Abstract An assemblage of MORB analyses (n = 792 samples), including a suite of new, high-precision LA-ICP-MS measurements (n = 79), has been critically compiled in order to provide a window into the chemical composition of these mantle-derived materials and their respective source region(s), commonly referred to as the depleted MORB mantle (DMM ...
Ricardo Arevalo, William F Mcdonough
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Relationship between submarine MORB glass textures and atmospheric component of MORBs
Chemical Geology, 2003Abstract We investigated the relationship between noble gas signatures and sample textures among glassy fragments. Glassy MORB fragments were classified based on their texture. By handpicking under a binocular, they were divided into three groups: (1) heterogeneous “outer” part, (2) homogeneous “middle” part, and (3) “inner” neighbors of the ...
Hidenori Kumagai, Ichiro Kaneoka
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Anomalously low sodium MORB magmas: Evidence for depleted MORB or analytical artifact?
Geochimica et Cosmochimica Acta, 1995Abstract One common characteristic of quenched natural basaltic glass is the presence of microcrystalline halos surrounding many microphenocrysts (spherulites). From our investigations of the composition of basaltic grasses in both quenched lavas and in plagioclase-hosted melt inclusions, we have discovered that quench halo portions of spherulites ...
Roger L. Nielsen +2 more
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