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Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994e%26psl.128..731c&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 128, no. 3-4, p. 731-733

Computer Science

1

Basalt, Boron, Chemical Composition, Earth Mantle, Geochemistry, Interstellar Chemistry, Magma, Porosity, Rocks

Scientific paper

Chen-Feng You questions some of our interpretations of the B contents and delta B-11 values of oceanic basalts. His comments can be summarized in three points: (1) He emphasizes the importance of sediments as a B carrier, which should be taken into account in any budget calculation. He suggests that our estimated amount of boron subducted into the mantle is incorrect. (2) He quotes unpublished experimental results indicating that sedimentary boron is partly leached from a hemi-pelagic sediment at moderate temperatures (T less than or = 150 C) leaving a B-depleted residue isotopically fractionated to low delta B-11 values. (3) He further argues that Boron abundance and delta B-11 values at both Hawaii and the Halmahera arc could be explained by the incorporation of such fluids (i.e., released during subduction). Although we do think that the type of experiment described by You is effectively lacking at the moment and is of great potential for the understanding of B geochemical cycle, we also think that: (1) the experiments of You are insufficient to elucidate the behavior of B during subduction; and (2) two points of our work were misunderstood. We discuss successively the three points raised by You.

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