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Subdivision of the Mg-suite noritic rocks into Mg-gabbronorites and Mg-norites.

Journal of Geophysical Research

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Abstract

The rocks of these two groups differ in ratios of high-Ca pyroxene to total pyroxene, compositions of pyroxene and plagioclase, assemblages of Ti-, Nb- and Zr-bearing minerals, compositions of chrome spinel, bulk-rock Ti/Sm and Sc/Sm, and measured ages. Two hypotheses are offered for differences in composition of the parent magmas: 1) compositional heterogeneity of the mantle source areas; 2) variations in extent of partial melting of mantle source regions and variations in extent of assimilation of the anorthosite and highly differentiated residual liquid that were produced during the primordial lunar differentiation.-P.Br.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Subdivision of the Mg-suite noritic rocks into Mg-gabbronorites and Mg-norites.
Series title:
Journal of Geophysical Research
Volume
88
Issue:
Supplement
Year Published:
1983
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article