Results 171 to 180 of about 72,842 (206)
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Picrites as parental magma of MORB-type tholeiites
Nature, 1982Recent experimental work on peridotites and basalts1–3 and a reappraisal of ophiolite complexes4 supports the concept that basalts are derived from picritic parents5–7. The occurrence of a density minimum in the liquid line of descent8–10 explains why mid-ocean ridge tholeiites fall in a restricted compositional range, and parental picrites can only be
D. J. Beets +4 more
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2000
Macquarie Island is an exposure above sea level of the Macquarie Ridge Complex, on the boundary between the Australian and Pacific plates south of New Zealand. Geodynamic reconstructions show that at ca. 12-9.5 Ma, oceanic crust of the Macquarie Island region was created at this plate boundary within a system of short spreading-ridge segments linked by
Rick Varne +2 more
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Macquarie Island is an exposure above sea level of the Macquarie Ridge Complex, on the boundary between the Australian and Pacific plates south of New Zealand. Geodynamic reconstructions show that at ca. 12-9.5 Ma, oceanic crust of the Macquarie Island region was created at this plate boundary within a system of short spreading-ridge segments linked by
Rick Varne +2 more
openaire +1 more source
MORB-like mantle beneath Lanzerote Island, Canary Islands
Russian Journal of Earth Sciences, 2012Our newly obtained data on the He-Ar and Sr-Nd isotopic systematics of mantle xenoliths and their host basalts suggest the absence of a mantle plume beneath Lanzerote Island. The R/Ra ratio of the xenoliths lies within the range typical of MORB. The He isotopic composition of basalts from Lanzerote Island provides evidence of the mixing of two sources:
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The oxidation state of Fe in MORB glasses and the oxygen fugacity of the upper mantle
Earth and Planetary Science Letters, 2011Elizabeth Cottrell, Katherine A Kelley
exaly
Die Harnbestandtheile bei Morb. Addisonii
Archiv für Pathologische Anatomie und Physiologie und für Klinische Medicin, 1872openaire +1 more source
II. Untersuchungen zu den Krankheitsbüchern Morb. II, Morb. III und Int
1975openaire +1 more source