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Contributions to Mineralogy and Petrology

, Volume 113, Issue 4, pp 492–501 | Cite as

Effects of F, B2O3 and P2O5 on the solubility of water in haplogranite melts compared to natural silicate melts

  • François Holtz
  • Donald B. Dingwell
  • Harald Behrens
Article

Abstract

The effects of F, B2O3 and P2O5 on the H2O solubility in a haplogranite liquid (36 wt. % SiO2, 39 wt. % NaAlSi3O8, 25 wt. % KAlSi3O8) have been determined at 0.5, 1, 2, and 3 kb and 800, 850, and 900°C. The H2O solubility increases with increasing F and B content of the melt. The H2O solubility increase in more important at high pressure (2 and 3 kb) than at low pressure (0.5 kb). At 2 kb and 800°C, the H2O solubility increases from 5.94 to 8.22 wt. % H2O with increasing F content in the melt from 0 to 4.55 wt. %, corresponding to a linear H2O solubility increase of 0.53 mol H2O/mol F. With addition of 4.35 wt. % B2O3, the H2O solubility increases up to 6.86 wt. % H2O at 2 kb and 800°C, corresponding to a linear increase of 1.05 mol H2O/mol B2O3. The results allow to define the individual effects of fluorine and boron on H2O solubility in haplogranitic melts with compositions close to that of H2O-saturated thermal minima (at 0.5–3 kb). Although P has a dramatic effect on the phase relations in the haplogranite system, its effect on the H2O solubility was found to be negligible in natural melt compositions. The concominant increase in H2O solubility and F can not be interpreted on the basis of the available spectroscopic data (existence of hydrated aluminofluoride complexes or not). In contrast, hydrated borates or more probably boroxol complexes have been demonstrated in B-bearing hydrous melts.

Keywords

SiO2 Hydrate Silicate Boron Borate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bea F, Fershtater G, Corretge LG (1992) The geochemistry of phosphorus in granite rocks and the effect of aluminium. Lithos (in press)Google Scholar
  2. Behrens H, Holtz F, Dingwell DB, Taylor RP (1991) Compositional dependence of water solubility in haplogranitic melts. EOS 72:533–534Google Scholar
  3. Bénard F, Moutou P, Pichavant M (1985) Phase relations of tourmaline leucogranites and the significance of tourmaline in silicic magmas. J Geol 93:271–291Google Scholar
  4. Burnham CW (1981) The nature of multicomponent aluminosilicate melts. In: Richards DT, Wickman FE (eds) Chemistry and geochemistry of solutions at high temperatures and pressures, physics and chemistry of the earth. Pergamon, New York, pp 197–229Google Scholar
  5. Burnham CW, Nekvasil H (1986) Equilibrium properties of granite pegmatite magmas. Am Mineral 71:239–263Google Scholar
  6. Chorlton LB, Martin RF (1978) The effect of boron on the granite solidus. Can Mineral 16:239–244Google Scholar
  7. Day HW, Fenn PM (1982) Estimating the P-T-X(H2O) conditions during crystallization of low calcium granites. J Geol 90:485–507Google Scholar
  8. Dingwell DB (1987) Melt viscosities in the system NaAlSi3O8−H2O−F2O-1. In: Mysen BO (ed) Magmatic processes: physicochemical principles. The Geochemical Society, Spec Publ 1:423–431Google Scholar
  9. Dungwell DB, Knoche R, Webb SL (1992a) The effect of fluorine on the density of haplogranite melt. Am Mineral (in press)Google Scholar
  10. Dingwell DB, Knoche R, Webb SL, Pichavant M (1992b) The effect of B2O3 on the viscosity of haplogranitic liquids. Am Mineral 77:457–461Google Scholar
  11. Dingwell DB, Harris DM, Scarfe CM (1984) The solubility of H2O in melts in the system SiO2−Al2O3−Na2O−K2O at 1 to 2 kbar. J Geol 92:387–395Google Scholar
  12. Dingwell DB, Scarfe CM, Cronin DJ (1985) The effect of fluorine on viscosities of melts in the system Na2O−Al2O3−SiO2: Implications for phonolites, trachytes and rhyolites. Am Mineral 70:80–87Google Scholar
  13. Franz H (1966) Solubility of water vapour in alkali borate melts. J Am Ceram Soc 49:473–477Google Scholar
  14. Gan H, Hess PC (1992) Phosphate speciation in potassium aluminosilicate glasses. Am Mineral 77:495–506Google Scholar
  15. Hamilton DL, Oxtoby S (1986) Solubility of water in albite-melt determined by the weight-loss method. J Geol 94:626–630Google Scholar
  16. Harrison TM, Watson EB (1984) The behaviour of apatite during crustal anatexis: equilibrium and kinetic considerations. Geochim Cosmochim Acta 48:1468–1477Google Scholar
  17. Holtz F, Behrens H, Dingwell DB, Taylor RP (1992a) Water solubility in aluminosilicate melts of haplogranite compositions at 2 kbar. Chem Geol 96:289–302Google Scholar
  18. Holtz F, Pichavant M, Barbey P, Johannes W (1992b) Effects of H2O on liquidus phase relations in the haplogranite system at 2 and 5 kbar. Am Mineral 77:1223–1241Google Scholar
  19. Kohn SC, Dupree R, Mortuza MG, Henderson CMB (1991) NMR evidence for five- and six-coordinated aluminum fluoride complexes in F-bearing aluminosilicate glasses. Am Mineral 76:309–312Google Scholar
  20. Koster van Groos AF, Wyllie PJ (1968) Melting relationships in the system NaAlSi3O8−NaF−H2O to 4 kilobars pressure. J Geol 76:50–70Google Scholar
  21. Lapham KE, Holloway JR, Delaney JR (1984) Diffusion of H2O and D2O in obsidian at elevated temperatures and pressures. J Non-Cryst Solids 67:179–1912Google Scholar
  22. London D (1987) Internal differentiation of rare-element pegmatites: effects of boron, phosphorus, and fluorine. Geochim Cosmochim Acta 51:403–420Google Scholar
  23. London D, Hervig RL, Morgan GB VI (1988) Melt-vapor solubilities and elemental partitioning in peraluminous granite-pegmatite systems: experimental results with Macusani glass at 200 MPa. Contrib Mineral Petrol 99:360–373Google Scholar
  24. London D, Morgan GB VI, Hervig RL (1989) Vapor-undersaturated experiments with Macusani glass + H2O at 200 MPa, and the internal differentiation of granitic pegmatites. Contrib Mineral Petrol 102:1–17Google Scholar
  25. London D, Loomis JL, Huang W, Morgan GB VI (1990) Behavior and effects of phosphorus in the system Ab−Or−Qz−H2O at 200 MPa (H2O). Geol Soc Am Abstr with Prog: 302Google Scholar
  26. Manning DAC (1981) The effect of fluorine on liquidus phase relationships in the system Qz−Ab−Or with excess water at 1 kbar. Contrib Mineral Petrol 76:257–262Google Scholar
  27. Manning DAC, Hamilton DL, Henderson CMB, Dempsey MJ (1980) The probable occurrence of intersticial Al in hydrous, F-bearing and F-free aluminosilicate melts. Contrib Mineral Petrol 75:257–262Google Scholar
  28. McMillan P, Holloway JR (1987) Water solubility in aluminosilicate melts. Contrib Mineral Petrol 97:320–332Google Scholar
  29. Morgan GB VI, London D, Kirkpatrick RJ (1990) Reconnaissance spectroscopic study of hydrous sodium aluminum borosilicate glasses. Geol Soc Am Abstr with Prog 22:A167Google Scholar
  30. Mysen BO, Ryerson FJ, Virgo D (1981) The structural role of phosphorus in silicate melts. Am Mineral 66:106–117Google Scholar
  31. Oxtoby S, Hamilton DL (1978) The discrete association of water with Na2O and SiO2 in NaAl silicate melts. Contrib Mineral Petrol 66:185–188Google Scholar
  32. Pichavant M (1981) An experimental study of the effect of boron on a water-saturated haplogranite at 1 kbar pressure: geological applications. Contrib Mineral Petrol 76:430–439Google Scholar
  33. Pichavant M (1983) Melt-fluid interaction deduced from studies of silicates-B2O3−H2O systems at 1 kbar. Bull Mineral 106:201–211Google Scholar
  34. Pichavant M (1987) Effects of B and H2O on liquidus phase relations in the haplogranite system at 1 kbar. Am Mineral 72:1056–1070Google Scholar
  35. Pichavant M, Manning DAC (1984) Petrogenesis of tourmaline granites and topaz granites; the contribution of experimental data. Phys Earth Planet Inter 35:31–50Google Scholar
  36. Pichavant M, Boher M, Stenger JF, Aissa M, Charoy B (1987a) Relations de phase des granites de Beauvoir à 1 et 3 kbar en conditions de saturation en H2O. In: Cuney M, Autran A (eds) Géologie de la France. Mémoire GPF vol 1, no 2-3, pp 77–86Google Scholar
  37. Pichavant M, Valencia Herrera J, Boulmier S, Briqueu L, Joron JL, Juteau M, Marin L, Michard A, Sheppard SMF, Treuil M, Vernet M (1987b) The macusani glasses, SE Peru: evidence of chemical fractionation in peraluminous magmas. In: BO Mysen (ed) Magmatic processes: physicochemical principles. The Geochemical Society, Spec Publ 1:359–373Google Scholar
  38. Pichavant M, Holtz F, McMillan P (1992a) Phase relations and compositional dependence of H2O solubility in quartz-feldspar melts. Chem Geol 96:303–320Google Scholar
  39. Pichavant M, Montel JM, Richard LR (1992b) Apatite solubility in peraluminous liquids: experimental data and an extension of the model of Harrison and Watson (1984). Geochim Cosmochim Acta 56:3855–3861Google Scholar
  40. Schaller T, Dingwell DB, Keppler H, Knöller W, Merwin L, Sebald A (1992) Fluorine in silicate glasses: a multinuclear nuclear magnetic resonance study. Geochim Cosmochim Acta 56:701–707Google Scholar
  41. Sorapure R, Hamilton DL (1984) The solubility of water in melts of albite composition with varying additions of fluorine. In: Henderson CMB (ed) Progress in experimental petrology. NERC Prog Exp Pet 6:28–29Google Scholar
  42. Tuttle OF, Bowen NL (1958) Origin of granite in the light of experimental studies in the system NaAlSi3O8−KAlSi3O8−SiO2−H2O. Geol Soc Am Mem 74:1–156Google Scholar
  43. Webster JD (1990) Partitioning of F between H2O and CO2 fluids and topaz rhyolite melt. Contrib Mineral Petrol 104:424–438Google Scholar
  44. Westrich HR (1987) Determination of water in volcanic glasses by Karl-Fischer titration. Chem Geol 63:335–340Google Scholar

Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • François Holtz
    • 1
  • Donald B. Dingwell
    • 2
  • Harald Behrens
    • 3
  1. 1.CNRS-CRSCMOrleansFrance
  2. 2.Bayerisches GeoinstitutUniversität BayreuthBayreuthGermany
  3. 3.Institut für MineralogieUniversität HannoverHannover 1Germany

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