Majoritic garnets in Hawaiian Xenoliths: Preliminary results

Majoritic garnets in Hawaiian Xenoliths: Preliminary results

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,...

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Veröffentlicht in:Geophysical research letters 2001-09, Vol.28 (18), p.3509-3512
Hauptverfasser: Keshav, Shantanu, Sen, Gautam
Format: Artikel
Sprache:eng
Schlagworte:
Crystalline rocks
Earth sciences
Earth, ocean, space
Exact sciences and technology
Igneous and metamorphic rocks petrology, volcanic processes, magmas
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Zusammenfassung: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 (
ISSN:0094-8276
1944-8007
DOI:10.1029/2001GL012950