Abstract
Volatiles can be transferred from slabs to wedge asthenosphere either by silicate melts of by hydrous fluids. Experiments defining the nature of these agents, and expected ratios of transported elements, are not well-constrained, especially for fluids. Phase equilibria of basaltic slab material and probable geotherms suggest that slabs devolatilize or melt, or both, at depths shallower than the average 136 km beneath arc fronts. Volatiles probably are transported into immediately overlying asthenosphere and then carried by flow beneath arcs. Simple addition of probable fluid to MORB or OIB-type asthenosphere cannot explain observed H2O and K2O to asthenosphere and more complicated histories of melt generation; the melts generated at 100–140 km beneath arcs bear little chemical relation to arc basalts. Volatiles thus must pass numerous “filters” before they emerge in arc volcanics.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Arculus R.J. and Johnson R.W. (1978) Earth Planet. Sci. Lett. 39, 118–126.
Baker D.R. and Eggler D.H. (1987) Amer. Mineral.
Brophy J.G. and Marsh B.D. (1986) J. Petrol. 217, 763–789.
Byers C.D., Garcia M.O. and Muenow D.W. (1979) Earth Planet. Sci. Lett. 79, 9–20.
Delaney J.M. and Helgeson H.C. (1978) Amer. J. Sci. 278, 638–686.
Eggler D.H. (1987) in: Menzies M.A. and Hawkesworth C.J. (eds.) Mantle Metasomatism, pp. 21–41.
Garcia, M.O., Lui N.W.K. and Muenow D.W. (1979) Geochim. Cosmochim. Acta 43, 305–31.
Grove T.L. and Baker M.B. (1984) J. Geophys. Res. 89, 3253–3274.
Gust D.A. and Perfit M.R. (1987) Contrib. Mineral. Petrol.
Jakes P. and Gill J.B. (1970) Earth Planet. Sci. Lett. 9, 17–28.
Kuno, H. (1966) Bull. Volc. 29, 195–222.
McBirney A.R. (1978) Ann. Rev. Earth Planet. Sci. 6, 437–456.
McBirney A.R., Baker B.H. and Wilson R.H. (1985) J. Volc. Geotherm. Res. 14, 1–24.
Marsh B.D. (1982) in: Thorpe, R.S. (ed.) Andesites. pp. 9–114.
Moore J.G. (1970) Contrib. Mineral. Petrol. 28, 272–279.
Myers, J.D., March B.D. and Sinha A.K. (1985) Contrib. Mineral. Petrol. 91, 221–234.
Nye C.J. and Reid M.R. (1986) J. Geophys. Res. 91, 10271–10287.
Olafsson M. and Eggler D.H. (1983) Earth Planet. Sci. Lett. 64, 305–315.
Perfit M.R., Gust D.A., Bence A.E., Arculus R.J. & Taylor S.R. (1980) Chem. Geol. 30, 227–256.
Ringwood A.E. (1974) J. Geol. Soc. Lond. 130. 183–204.
Schneider M.E. and Eggler D.H. (1986) Geochim. Cosmochim. Acta 50, 711–724.
Tatsumi Y., Sakuyama M., Fukuyama H. and Kushiro I. (1983) J. Geophys. Res. 88, 5815–5825.
Tatsumi Y. and Hamilton D.H. (1986) J. Volc. Geotherm. Res. 29, 293–310.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Kluwer Academic Publishers
About this chapter
Cite this chapter
Eggler, D.H. (1989). Influence of H2O And CO2 on Melt and Fluid Chemistry in Subduction Zones. In: Hart, S.R., Gülen, L. (eds) Crust/Mantle Recycling at Convergence Zones. NATO ASI Series, vol 258. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0895-6_11
Download citation
DOI: https://doi.org/10.1007/978-94-009-0895-6_11
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6891-8
Online ISBN: 978-94-009-0895-6
eBook Packages: Springer Book Archive