Composition of chromian diopside megacryst in DSDP Leg 37 basalts (Table 2, 3)
Cobertura |
MEDIAN LATITUDE: 37.017700 * MEDIAN LONGITUDE: -34.160233 * SOUTH-BOUND LATITUDE: 36.878700 * WEST-BOUND LONGITUDE: -35.198700 * NORTH-BOUND LATITUDE: 37.295700 * EAST-BOUND LONGITUDE: -33.641000 * DATE/TIME START: 1974-06-17T00:00:00 * DATE/TIME END: 1974-07-18T00:00:00 * MINIMUM ELEVATION: -3188.0 m * MAXIMUM ELEVATION: -1806.0 m |
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Data(s) |
16/12/1977
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Resumo |
Refractory megacrysts of olivine, plagioclase, chromian diopside and Cr-Al spinel, which were not in equilibrium with the host oceanic tholeiite on eruption, are present in samples from several dredge sites and DSDP drill sites in the Atlantic and Pacific Oceans. They have multiple origins: (1) cognate or accidental mantle fragments; (2) relict fragments from fractional crystallization of parental liquids considerably more primitive than oceanic tholeiite; and most commonly (3) the fractional crystallization products of such liquids mixed with oceanic tholeiite magma. Melt inclusions in chrome-spinel phenocrysts provide evidence for this postulated Mg- and Ca-rich magma which has counterparts in the Scottish Tertiary Province and in west Greenland. |
Formato |
text/tab-separated-values, 46 data points |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.708792 doi:10.1594/PANGAEA.708792 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Donaldson, Colin H; Brown, Roy W (1977): Refractory megacrysts and magnesium-rich melt inclusions within spinel in oceanic tholeiits: indicators of magma mixing and parental magma composition. Earth and Planetary Science Letters, 37(1), 81-89, doi:10.1016/0012-821X(77)90148-0 |
Palavras-Chave | #37-332A; 37-332B; 37-335; Aluminium oxide; Calcium oxide; Chromium; Chromium(III) oxide; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Elevation of event; Enstatite; Event label; Ferrosilite; Glomar Challenger; Iron oxide, Fe2O3; Iron oxide, FeO; Latitude of event; Leg37; Lithology/composition/facies; Longitude of event; Magnesium number; Magnesium oxide; Manganese oxide; North Atlantic; North Atlantic/VALLEY; ODP sample designation; Potassium oxide; Sample code/label; Silicon dioxide; Sodium oxide; Titanium oxide; Wollastonite |
Tipo |
Dataset |