Composition of chromian diopside megacryst in DSDP Leg 37 basalts (Table 2, 3)

DOI

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.

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

Identifier
DOI https://doi.org/10.1594/PANGAEA.708792
Related Identifier IsSupplementTo https://doi.org/10.1016/0012-821X(77)90148-0
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.708792
Provenance
Creator Donaldson, Colin H; Brown, Roy W
Publisher PANGAEA
Publication Year 1977
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 46 data points
Discipline Earth System Research
Spatial Coverage (-35.199W, 36.879S, -33.641E, 37.296N); North Atlantic/VALLEY; North Atlantic
Temporal Coverage Begin 1974-06-17T00:00:00Z
Temporal Coverage End 1974-07-18T00:00:00Z