Figure F97. Na2O versus TiO2 variation in the lithologies from Hole U1309D. Ti-rich oxide gabbros are not reported because they mainly plot out of this scale. A strong Ti enrichment separates the basalt-diabase trend from the gabbro trend. Gabbroic rocks are progressively enriched in the order of olivine-rich troctolites to troctolites to gabbros to gabbronorites.
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