Evidence from 10Be and U series disequilibria on the possible contamination of mid-ocean ridge basalt glasses by sedimentary material

Geochemistry, Geophysics, Geosystems

Volumn 1, Issue 8, 2000, Pages

  Bourdon, B ^a   Goldstein, S J ^b   Bourles D ^c,d   Murrell, M T ^b   Langmuir, C H ^e  

^a CNRS   (France)

^b LOS ALAMOS NATIONAL LABORATORY   (United States)

^c CENTRE DE CALCUL DE L INSTITUT NATIONAL DE PHYSIQUE NUCLEAIRE ET DE PHYSIQUE DES PARTICULES   (France)

^d CEREGE   (France)

^e Department of Earth and Environmental Sciences   (United States)

Author keywords

10Be; basalt; contamination; mid ocean ridge; U series

Indexed keywords

BASALT; GLASS; SEDIMENTOLOGY; STRUCTURAL GEOLOGY; SUBMARINE GEOLOGY;

COSMOGENIC NUCLIDES; DETECTION LIMITS; MASS-BALANCE CALCULATIONS; MID OCEAN RIDGE BASALTS; MID-OCEAN RIDGES; SAMPLE PREPARATION; U-SERIES; U-SERIES DISEQUILIBRIA;

CONTAMINATION;

EID: 84957436531     PISSN: None     EISSN: 15252027     Source Type: Journal    
DOI: 10.1029/2000GC000047     Document Type: Article

References (28)

1. 231Pa, Earth Planet. Sci. Lett., 96, 287-304.
2. 230Th disequilibrium data, Nature, 384, 231-235.
3. Bourdon, B., C. H. Langmuir, and, A. Zindler, (1996 b), Ridge-hotspot interaction along the Mid-Atlantic Ridge between 37°30′ and 40°30′N: The U-Th disequilibrium evidence, Earth Planet. Sci. Lett., 142, 175-189.
4. 9Be en milieu océanique: Application à la datation des sédiments marins, Ph.D. thesis, Univ. Paris-Sud, Orsay, France.
5. Bourlès, D., (1992), Beryllium isotope geochemistry of hydrothermally altered sediments, Earth Planet. Sci. Lett., 109, 47-56.
6. Bourlès, D. L., G. M. Raisbeck, E. T. Brown, F. Yiou, and, J. M. Edmond, (1991), Beryllium isotope systematics of submarine hydrothermal systems, Earth Planet. Sci. Lett., 105, 534-542.
7. 226Ra disequilibria in volcanics-A new insight into melting conditions, Earth Planet. Sci. Lett., 126, 61-74.
8. Claude-Ivanaj, C., B. Bourdon, and, C. J. Allègre, (1998), Ra-Th-Sr isotope systematics in Grande Comore Island: A case study of plume-lithosphere interaction, Earth Planet. Sci. Lett., 164, 99-117.
9. 238U radioactive disequilibria in tholeiites from the FAMOUS zone (Mid-Atlantic Ridge, 36°50′N): Th and Sr isotopic geochemistry, Earth Planet. Sci. Lett., 55, 247-256.
10. Elliott, T., (1997), Fractionation of U and Th during mantle melting: A reprise, Chem. Geol., 139, 165-183.
11. German, C. R., N. C. Higgs, J. Thomson, R. Mills, H. Elderfield, and, J. Blusztajn, (1993), A geochemical study of metalliferous sediments from the TAG hydrothermal mound, 26°08′N, Mid-Atlantic Ridge, J. Geophys. Res., 98, 9683-9692.
12. Goldstein, S. J., M. T. Murrell, and, D. R. Janecky, (1989), Th and U isotopic systematics of basalts from the Juan de Fuca and Gorda Ridges by mass spectrometry, Earth Planet. Sci. Lett., 96, 134-146.
13. 230Th disequilibrium, Earth Planet. Sci. Lett., 107, 25-41.
14. 230Th chronology of mid-ocean ridge basalts, Earth Planet. Sci. Lett., 115, 151-159.
15. Krishnaswami, S., and, J. K. Cochran, (1978), Uranium and thorium series nuclides in oriented ferromanganese nodules: Growth rates, turnover time and nuclide behavior, Earth Planet. Sci. Lett., 40, 45-62.
16. Lundstrom, C. C., J. Gill, Q. Williams, and, M. R. Perfit, (1995), Mantle melting and basalt extraction by equilibrium porous flow, Science, 270, 1958-1961.
17. MacDougall, J. D., R. C. Finkel, J. Carlson, and, S. Krishnaswami, (1979), Isotopic evidence for uranium exchange during low-temperature alteration of oceanic basalt, Earth Planet. Sci. Lett., 42, 27-34.
18. 238U disequilibrium and the melting processes beneath ridge, Earth Planet. Sci. Lett., 72, 149-157.
19. 235U disequilibrium in volcanic rocks, Earth Planet. Sci. Lett., 148, 259-271.
20. Pickett, D. A., M. T. Murrell, and, R. W. Williams, (1994), Determination of femtogram quantities of protactinium in geologic samples by thermal ionization mass spectrometry, Anal. Chem., 66, 1044-1049.
21. 230Th fractionation in young basaltic glasses from the East Pacific Rise, Earth Planet. Sci. Lett., 94, 199-207.
22. Schiano, P., J.-L. Birck, and, C. J. Allègre, (1997), Osmium-strontium-neodymium-lead isotopic covariations in mid-ocean ridge basalt glasses and the heterogeneity of the upper mantle, Earth Planet. Sci. Lett., 150, 363-379.
23. 231Pa during pulsed hydrothermal activity at 20°S, East Pacific Rise, Geochim. Cosmochim. Acta, 52, 669-677.
24. Sims, K. W. W., D. J. DePaolo, M. T. Murrell, W. S. Baldridge, S. J. Goldstein, and, D. A. Clague, (1995), Mechanisms of magma generation beneath Hawaii and mid-ocean ridges: Uranium/thorium and samarium/neodymium isotopic evidence, Science, 267, 508-512.
25. Spiegelman, M., and, T. Elliott, (1993), Consequences of melt transport for uranium series disequilibrium in young lavas, Earth Planet. Sci. Lett., 118, 1-20.
26. Valette-Silver, J. N., F. Tera, J. Klein, and, R. Middleton, (1987), Beryllium 10 in hydrothermal vent deposits from the east Pacific ridges: Role of sediments in the hydrothermal processes, J. Geophys. Res., 92, 11,364-11,372.
27. von Blanckenburg, F., R. K. O'Nions, N. S. Belshaw, A. Gibb, and, J. R. Hein, (1996), Global distribution of beryllium isotopes in deep ocean water as derived from Fe-Mn crusts, Earth Planet. Sci. Lett., 141, 213-226.
28. Williams, R. W., and, J. B. Gill, (1989), Effects of partial melting on the uranium decay series, Geochim. Cosmochim. Acta, 53, 1607-1619.