Abstract
IT has been proposed1–5 that the low Ce/Pb ratio of subduction-related basalts, relative to their oceanic counterparts, arises by the preferential transfer of lead to the mantle wedge (overlying the subducting slab) by non-magmatic processes. Fluxing of the mantle wedge by low-Ce/Pb fluids, generated by the dehydration of sub-ducted oceanic crust, is one mechanism favoured for this process (see, for example, ref. 5). Here we report the results of a series of high-pressure experiments, which confirm that low-Ce/Pb fluids coexist with the dominant mineral phases (garnet and clinopyroxene) produced during high-pressure dehydration of altered basalt. Our results show that the production of subduction-zone magmas from mantle sources fluxed by basalt-derived fluid is a mechanism by which relatively lead-rich, cerium-poor, mantle-derived material is added to the continents. The lead enrichment of the Earth's continental crust is thus a continuing process occurring at conver-gent margins.
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References
Hofmann, A. W., Jochum, K. P., Seufert, M. & White, W. M. Earth planet. Sci. Lett. 79, 33–45 (1986).
Newsom, H. E., White, W. M., Jochum, J. P. & Hofmann, A. W. Earth planet. Sci. Lett. 80, 299–313 (1986).
Hofmann, A. W. Earth planet. Sci. Lett. 90, 297–314 (1988).
Peucker-Ehrenbrink, B., Hofmann, A. W. & Hart, S.R. Earth planet. Sci. Lett. 125, 129–142 (1994).
Miller, D. M., Goldstein, S. L. & Langmuir, C. H. Nature 368, 514–520 (1994).
Brenan, J. M., Shaw, H. F., Ryerson, F. J. & Phinney, D. L. Geochim. cosmochim. Acta. 59, 3331–3350 (1995).
Meen, J. K., Eggler, D. H. & Ayers, J. C. Nature 340, 301–303 (1989).
Mysen, B. O. Am. Mineral. 64, 274–287 (1979).
Mysen, B. O. Neues Jb. Miner. Abh. 146, 41–65 (1983).
Beattie, P. Geochim. cosmochim. Acta 57, 47–55 (1993).
Blundy, J. & Wood, B. Nature 372, 452–454 (1994).
Ben Othman, D., White, W. M. & Patchett, P. J. Earth planet. Sci. Lett. 94, 1–21 (1989).
Martin, H. Geology 14, 753–756 (1986).
Rapp, R. P., Watson, E. B. & Miller, C. F. Precambr. Res. 51, 1–25 (1991).
Beard, J. S. & Lofgren, G. E. J. Petrol. 32, 365–401 (1991).
Rushmer, T. Contr. Miner. Petrol. 107, 41–59 (1991).
Wolf, M. B. & Wyllie, P. J. Contr. Miner. Petrol. 115, 369–383 (1994).
Weaver, B. L. & Tarney, J. Earth planet. Sci. Lett. 51, 279–296 (1980).
Brenan, J. M., Shaw, H. F., Ryerson, F. J. & Phinney, D. L. Earth planet. Sci. Lett. (in the press).
McDermott, F. M. & Hawkesworth, C. M. Earth planet. Sci. Lett. 104, 1–15 (1991).
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Brenan, J., Shaw, H. & Ryerson, F. Experimental evidence for the origin of lead enrichment in convergent-margin magmas. Nature 378, 54–56 (1995). https://doi.org/10.1038/378054a0
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DOI: https://doi.org/10.1038/378054a0
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