Results 141 to 150 of about 7,541 (160)
Some of the next articles are maybe not open access.
Dating of neovolcanic MORB using (226Ra/230Th) disequilibrium
Earth and Planetary Science Letters, 1990Abstract A method for determining ages of Mid Ocean Ridge Basalts (MORB) erupted within the last 8000–10,000 years is presented and assessed. This technique employs radioactive disequilibrium between the U-series parent/daughter isotopes 230 Th and 226 Ra.
K.H. Rubin, J.D. Macdougall
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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:
openaire +1 more source
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