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    Evolution of the basalts from three back-arc basins of southwest Pacific

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    Geo-Mar_Lett_18_305.pdf (562.0Kb)
    Date
    1999
    Author
    Mudholkar, A.V.
    Paropkari, A.L.
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    Abstract
    Petrography, petrochemistry, and mineral chemistry of basalts from the Woodlark, Manus, and Lau basins from the southwest Pacific have been studied to understand their magmatic evolution. Basalt from the western Woodlark Basin (Dobu Seamount) indicates mixing of a near-primitive magma with fractionated basaltic melt in shallow magma chambers. Basalts from Manus Basin and Central Lau Spreading Center (Lau Basin) are typical N-MORBs, and they exhibit olivine fractionation under high oxidizing conditions while basalts from Mangatolu Triple Junction (Lau Basin) are enriched in Al sub(2) O sub(3), K sub(2) O, and Zr indicative of a contribution from a subducting plate
    URI
    http://drs.nio.org/drs/handle/2264/1789
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