Skip to main content Accessibility help
×
Home

Hydrothermal reactivity of K-smectite at 300°C and 100 bar: dissolution-crystallization process and non-expandable dehydrated smectite formation

  • R. Mosser-Ruck (a1), M. Cathelineau (a1), A. Baronnet (a2) and A. Trouiller (a3)

Abstract

The hydrothermal reactivity of a smectite saturated with K was studied experimentally at 300°C and 100 bar in (Na,K) chloride solutions (Na/K = 0, 50 and 100, liquid/solid ratio = 10/1). X-ray diffraction, TEM and microprobe results show: (1) a partial to total dissolution of the initial smectite layers; and (2) the crystallization of newly-formed euhedral I-S. Random I-S is formed after 7 days, but an ordered mixed-layer I-S containing <30% expandable layers formed in the longest runs (112 days). The I-S is characterized by non-expandable layers of two distinct types: dehydrated smectite and illite. The Si content is lower in the I-S than in the initial smectite, thus creating a charge deficit, mostly compensated by the introduction of Na to the interlayer space, and yielding a silica release to the solution and subsequent crystallization of quartz and cristobalite.

Copyright

References

Hide All
Baronnet, A., Amouric, M. & Chabot, B. (1976) Mécanismes de croissance, polytypisme et polymorphisme de la muscovite hydroxylée synthétique. J. Cryst. Growth, 32, 3759.
Bird, G.W. (1979) Possible buffer materials for use in a nuclear waste vault. Atomic Energy of Canada Limited Technical Record, TR-72.
Bird, G.W. & Cameron, D.J. (1982) Vault sealing research for the Canadian nuclear fuel waste management program. Atomic Energy of Canada Limited Technical Record, TR-145.
Boles, J.R. & Franks, S.G. (1979) Clay diagenesis in Wilcox sandstones of southwest Texas: implication of smectite diagenesis on sandstone cementation. J. Sed. Pet. 49, 5570.
Boutiche, M. (1995) Stabilité physico-chimique des smectites et de I'illite en presence de solutions chargées en electrolytes: étude experiméntale a 150°C. PhD thesis, FNPL Nancy, France.
Cathelineau, M., Ruck, R. & Baronnet, A. (1993) Hydrothermal reactivity of Ca, Na and K-smectite transformation. Proc. 4th Int. Symp. Hydrothermal Reactions, Nancy.
Cuadros, J. & Linares, J. (1995) Experimental kinetic study of the smectite-to-illite transformation. Geochim. Cosmochim. Acta, 60, 3, 439453.
Debrabant, P., Delbart, S. & Lemaguer, D. (1985) Microanalyses géochimiques de minéraux argileux de sediments prélevés en Atlantique Nord (forages du DSDP). Clay Miner. 20, 125145.
Eberl, D. (1978) Reaction series for dioctahedral smectites. Clays Clay Miner. 26, 327340.
Eberl, D. & Hower, J. (1976) Kinetics of Mite formation. Geol. Soc. Am. Bull. 87, 13261330.
Eberl, D. & Hower, J. (1977) The hydrothermal transformation of sodium and potassium smectite into mixed-layer clay. Clays Clay Miner. 25, 215227.
Eberl, D. & Środoń, J. (1988) Ostwald ripening and interparticle-diffraction effects for Mite crystals. Am. Miner. 73, 13351345.
Fritz, B. (1981) Etude thermodynamique et modélisation des reactions hydrothermales et diagénétiques. Mém. Sci. Géol. 65.
Hoffmann, J. & Hower, J. (1979) Clay mineral assemblages as low grade metamorphic geothermometers: application to the thrust faulted distributed Belt of Montana, USA. Soc. Econ. Pal. Spec. Pub. 26, 5579.
Howard, J.J. & Roy, D.M. (1985) Development of layer charge and kinetics of experimental smectite alteration. Clays Clay Miner. 33, 8188.
Hower, J., Eslinger, E.V., Hower, M.E. & Perry, E.A. (1976) Mechanism of burial metamorphism of argillaceous sediments: I. Mineralogical and chemical evidence. Geol. Soc. Am. Bull. 87, 725737.
Huang, W.H., Longo, J.M. & Peaver, D.R. (1993) An experimental derived kinetic model for the smectiteto- illite conversion and its use as a geothermometer. Clays Clay Miner. 41, 162177.
Inoue, A. (1983) Potassium fixation by clay minerals during hydrothermal treatment. Clays Clay Miner. 31, 8191.
Inoue, A., Koyama, N., Kitagawa, R. & Watanabe, T. (1988) Chemical and morphological evidence for the conversion of smectite to Mite. Clays Clay Miner. 35,2, 111120.
Lahann, R.W. & Roberson, H.E. (1980) Dissolution of silica from montmorillonites: effect of solution chemistry. Geochim. Cosmochim. Acta, 44, 19371943.
Meunier, A. & Velde, B. (1989) Solid solution in I/S mixed-layer minerals and Mite. Am. Miner. 74, 11061112.
Nadeau, P.H. & Reynolds, R.C. (1981) Burial and contact metamorphism in the Mancos shale. Clays Clay Miner. 29, 249259.
Perry, E.A. & Hower, J. (1970) Burial diagenesis in Gulf Coast pelitic sediments. Clays Clay Miner. 18, 165177.
Pollastro, R.M. (1985) Mineralogical and morphological evidence for formation of illite at the expense of illite/ smectite. Clays Clay Miner. 33, 265274.
Pusch, R. (1978) Highly compacted Na bentonite as buffer substance. KBS - Teknisk Rapport, 74, Swedish Waste Management Program, Sweden.
Pusch, R. (1980) Swelling pressure of highly compacted bentonite. KBS - Teknisk Rapport, 80-13, Swedish Waste Management Program, Sweden.
Reynolds, R.C. (1980) Interstratified clay minerals. Pp. 249-303 in Crystal Structures of Clay Minerals and their X-ray Identification (Brindley, G.W. & Brown, G., editors). Mineralogical Society, London.
Reynolds, R.C. (1985) NEWMOD®, a computer program for the calculation of basal X-ray diffraction intensities and mixed layered-clays. Reynolds, R.C. Jr, Hanover, New Hampshire.
Ransom, B. & Helgeson, H.C. (1994) A chemical and thermodynamic model of aluminous dioctahedral 2:1 layer clay minerals in diagenetic processes: Regular solution representation of interlayer dehydration in smectite. Am. J. Sci. 294, 449484.
Roberson, H.E. & Lahann, R.W. (1981) Smectite to illite conversion rates: effects of solution chemistry. Clays Clay Miner. 29, 129-135.
Small, J.S. (1994) Fluid composition, mineralogy and morphological changes associated with the smectiteto- illite reaction: an experimental investigation of the effect of organic acid anions. Clay Miner. 29, 539554.
Weaver, C.E. & Beck, K.C. (1971) Clay-water diagenesis during burial: how mud becomes gneiss. Geol. Soc. Am. Spec. Pap. 134, 96 p.
Whitney, G. (1990) Role of water in the smectite-to-illite reaction. Clays Clay Miner. 38, 4, 343350.
Whitney, G. (1992) Dioctahedral smectite reactions at elevated temperatures: effects of K-availability, Na/ K ratio and ionic strength. Appl. Clay Sci. 7, 97112.
Whitney, G. & Northrop, H.R. (1988) Experimental investigation of the smectite to illite reaction: dual reaction mechanisms and oxygen-isotope systematics. Am. Miner. 73, 7790.

Related content

Powered by UNSILO

Hydrothermal reactivity of K-smectite at 300°C and 100 bar: dissolution-crystallization process and non-expandable dehydrated smectite formation

  • R. Mosser-Ruck (a1), M. Cathelineau (a1), A. Baronnet (a2) and A. Trouiller (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.