Majoritic garnets in Hawaiian xenoliths: preliminary results

Details Majoritic garnets in Hawaiian xenoliths: preliminary results Majoritic garnets in Hawaiian xenoliths: preliminary results

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3509k&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 18, p. 3509-3512

Physics

6

Geochemistry: Composition Of The Crust, Mineralogy And Petrology: Igneous Petrology, Mineralogy And Petrology: Major Element Composition, Mineral Physics: Optical, Infrared, And Raman Spectroscopy

Scientific paper

In this report we present chemical, textural, and spectroscopic information on some mantle garnets from Oahu, Hawaii that have recorded the pyroxene<==>garnet transformation. Their textural and compositional characteristics indicate a high pressure origin, consistent with a depth range of 180-270 km, which is much deeper than previously thought (<100 km). One eclogitic xenolith is particularly interesting because its textural and compositional characteristics suggest an origin in the deep upper mantle or the transition zone.

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