Browsing by Author "Hamilton, Christopher Charles"

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    The petrography, phase chemistry and petrology of South-West Indian Ridge basalts dredged beween 16 and 26 degrees east
    (1988) Hamilton, Christopher Charles; Le Roex, Anton
    Basaltic rocks dredged from the Southwest Indian Ridge (SWIR) between 16 and 26°E were investigated by petrographic microscope, electron microprobe and X-ray fluorescence analysis. Basalts are olivine tholeiites with geochemical characteristics similar to normal, depleted mid-ocean ridge basalts (MORB) from the SWIR between 0 and 11° East (le Roex et al., 1983). The suite consists predominantly of aphyric or microporphyritic olivine- and olivine-plagioclase basalts. Several porphyritic lavas are also present.