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    Alteration of basaltic glasses from the Central Indian Ocean

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    J_Geol_Soc_India_54_609.pdf (1.046Mb)
    Date
    1999
    Author
    Iyer, S.D.
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    Abstract
    Textural, mineralogical and compositional characteristics of basaltic glasses from the Central Indian Ocean show them to be altered to varying extents through their interaction with the seawater, resulting in the formation of palagonite. The major chemical changes are the loss of Si, Mg and Ca and a gain of Na and K whilst, Fe and Ti remained immobile. It reflects that the basaltic glasses have undergone initial to intermediate stages of palagonitisation under low temperature oxidative alterations. Subsequent accretion of ferromanganese oxides over the glasses have halted the progress of alteration
    URI
    http://drs.nio.org/drs/handle/2264/1781
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