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Radiogenic Argon Released By Stepwise Heating of Glauconite and Illite: The Influence of Composition and Particle Size

Published online by Cambridge University Press:  28 February 2024

A. A. Hassanipak  and
J. M. Wampler
A. A. Hassanipak
Affiliation:
Department of Mining Engineering, Faculty of Engineering, Tehran University, Tehran, Iran
J. M. Wampler
Affiliation:
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332-0340
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Abstract

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Various size fractions of several samples of glauconitic clay and illite were heated stepwise under vacuum for extended periods to: 1) evaluate radiogenic-argon (Ar) yields in relation to composition and size range; and 2) investigate the kinetics of radiogenic-Ar release. Each sample was heated at 250, 375, 500 and 1000 °C.

The radiogenic-Ar release patterns are nearly the same for the various size fractions of each sample. The Ar yields are not functions of particle size, at least not in these size ranges. This observation suggests that the kinetics of radiogenic-Ar release from these materials under these experimental conditions may be controlled by some mechanism other than diffusion.

The experiments show distinct differences in yield of radiogenic Ar from glauconitic clay and illite, which were most evident in the 375 and 500 °C steps. The yield (relative to the total amount of radiogenic Ar in the sample) at a particular temperature is inversely related to potassium (K) content, and there appears to be a direct dependence of yield on the iron (Fe) content. Because the literature provides evidence that Ar release during heating of phyllosilicates under vacuum is controlled by dehydroxylation and also provides evidence that dehydroxylation of clay may follow first-order kinetics, the kinetic data on Ar release from these samples were compared to simulated first-order reactions. To match the obser- vational data requires more than 2 activation energies in each simulation, which is consistent with the known mineralogical heterogeneity of such samples.

Keywords

ArgonDehydroxylationGlauconiteIllite
Type
Research Article
Information
Clays and Clay Minerals , Volume 44 , Issue 6 , December 1996 , pp. 717 - 726
Copyright
Copyright © 1996, The Clay Minerals Society

References

Amouric, M. and Parron, C.. 1985. Structure and growth mechanism of glauconite as seen by high-resolution transmission electron microscopy. Clays Clay Miner 33: 473–482.CrossRefGoogle Scholar
Aronson, J.L. and Douthitt, C.B.. 1986. K/Ar systematics of an acid-treated illite/smectite: Implications for evaluating age and crystal structure. Clays Clay Miner 34: 473–482.CrossRefGoogle Scholar
Aronson, J.L. and Hower, J.. 1976. Mechanism of burial metamorphism of argillaceous sediment: 2. Radiogenic argon evidence. Geol Soc Am Bull 87: 738–744.2.0.CO;2>CrossRefGoogle Scholar
Bray, C.J., Spooner, E.T.C., Hall, C.M., York, D., Bills, T.M. and Krueger, H.W.. 1987. Laser probe 40Ar/39Ar and conventional K/Ar dating of illites associated with the McClean unconformity-related uranium deposits, north Saskatchewan, Canada. Can J Earth Sci 24: 10–23.CrossRefGoogle Scholar
Brindley, G.W. and Nakahira, M.. 1957. Kinetics of dehydroxylation of kaolinite and halloysite. J Am Ceram Soc 40: 346–350.CrossRefGoogle Scholar
Burst, J.F.. 1958. Mineral heterogeneity in “glauconite” pellets. Am Mineral 43: 481–497.Google Scholar
Dong, H., Hall, C.M., Peacor, D.R. and Halliday, A.N.. 1995. Mechanisms of argon retention in clays revealed by laser 40Ar-39Ar dating. Science 267: 355–359.CrossRefGoogle ScholarPubMed
Evernden, J.F., Curtis, G.H., Kistler, R.W. and Obradovich, J.. 1960. Argon diffusion in glauconite, microcline, sanidine, leucite, and phlogopite. Am J Sci 258: 583–604.CrossRefGoogle Scholar
Evernden, J.F., Curtis, G.H., Obradovich, J. and Kistler, R.. 1961. On the evaluation of glauconite and illite for dating sedimentary rocks by the potassium-argon method. Geochim Cosmochim Acta 23: 78–99.CrossRefGoogle Scholar
Hower, J.. 1961. Some factors concerning the nature and origin of glauconite. Am Mineral 46: 313–334.Google Scholar
Hurley, P.M.. 1966. K-Ar dating of sediments. In: Schaeffer OA, Zähringer J, compilers. Potassium argon dating. New York: Springer-Verlag. p 134–151.Google Scholar
Killingsley, J.S. and Day, S.J.. 1990. Dehydroxylation kinetics of kaolinite and montmorillonite from Queensland Tertiary oil shale deposits. Fuel 69: 1145–1149.CrossRefGoogle Scholar
Levy, J.H.. 1990. Effect of water vapor pressure on the dehydration and dehydroxylation of kaolinite and smectite isolated from Australian Tertiary oil shales. Energy Fuels 4: 146–151.CrossRefGoogle Scholar
Liewig, N., Mossmann, J.-R. and Clauer, N.. 1987. Datation isotopique K-Ar d'argiles diagénétiques de réservoirs gréseux: mise en évidence d'anomalies thermiques du Lias inférieur en Europe nord-occidentale. CR Acad Sci Ser II 304: 707–711.Google Scholar
McDougall, I. and Harrison, T.M.. 1988. Geochronology and thermochronology by the 40Ar/39Ar Method. New York: Oxford Univ Pr. 212 p.Google Scholar
Merriman, R.J., Roberts, B. and Peacor, D.R.. 1990. A transmission electron microscope study of white mica crystallite size distribution in a mudstone to slate transitional sequence, North Wales, UK. Contrib Mineral Petrol 106: 27–40.CrossRefGoogle Scholar
Odin, G.S. and Bonhomme, M.G.. 1982. Argon behaviour in clays and glauconies during preheating experiments. In: Odin, G.S., editor. Numerical dating in stratigraphy. Chichester, UK: J Wiley. p 333–343.Google Scholar
Odin, G.S. and Dodson, M.H.. 1982. Zero isotopic age of glauconies. In: Odin, G.S., editor. Numerical dating in stratigraphy. Chichester, UK: J Wiley. p 277–305.Google Scholar
Odin, G.S. and Fullagar, P.D.. 1988. Geological significance of the glaucony facies. In: Odin, G.S., editor. Green marine clays: oolitic ironstone facies, verdine facies, glaucony facies and celadonite-bearing facies—a comparative study. Amsterdam: Elsevier Science. p 295–332.CrossRefGoogle Scholar
Polevaya, N.I., Murina, G.A. and Kazakov, G.A.. 1961. Utilization of glauconite in absolute dating. Ann NY Acad Sci 91: 298–310.CrossRefGoogle Scholar
Reuter, A. and Dallmeyer, R.D.. 1987a. Significance of 40Ar/39Ar age spectra of whole-rock and constituent grain-size fractions from anchizonal slates. Chem Geol (Isot Geosci) 66: 73–88.CrossRefGoogle Scholar
Reuter, A. and Dallmeyer, R.D.. 1987b. 40Ar/39Ar dating of cleavage formation in tuffs during anchizonal metamorphism. Contrib Mineral Petrol 97: 352–360.CrossRefGoogle Scholar
Sardarov, S.S.. 1961. Bond energy and retention of radiogenic argon in micas. Geochemistry for 1961. p 33-44 (Translated from Geokhimiya 1961. p 30-38).Google Scholar
Sardarov, S.S.. 1963. Preservation of radiogenic argon in glauconites. Geochemistry for 1963. p 937-944 (Translated from Geokhimiya 1963. p 905-911).Google Scholar
Sedivy, R.A., Wampler, J.M. and Weaver, C.E.. 1984. Potassium-argon. In: Weaver CE and Associates. Shale-slate metamorphism in southern Appalachians. Amsterdam: Elsevier Science. p 153–183.CrossRefGoogle Scholar
Smith, P.E., Evensen, N.M. and York, D.. 1993. First successful 40Ar/39Ar dating of glauconies: Argon recoil in single grains of cryptocrystalline material. Geology 21: 41–45.2.3.CO;2>CrossRefGoogle Scholar
Środoń, J., Andreoli, C., Elsass, F. and Robert, M.. 1990. Direct high-resolution transmission electron microscopic measurement of expandability of mixed-layer illite/smectite in bentonite rock. Clays Clay Miner 38: 373–379.CrossRefGoogle Scholar
Środoń, J., Morgan, D.J., Eslinger, E.V., Eberl, D.D. and Karlinger, M.R.. 1986. Chemistry of illite/smectite and end-member illite. Clays Clay Miner 34: 368–378.CrossRefGoogle Scholar
Stoch, L.. 1984. Significance of structural factors in dehydroxylation of kaolinite polytypes. J Therm Anal 29: 919–931.CrossRefGoogle Scholar
Stoch, L.. 1991. Explosive thermal dehydration of solids. J Therm Anal 37: 1415–1429.CrossRefGoogle Scholar
Suitch, P.R.. 1986. Mechanism for the dehydroxylation of kaolinite, dickite, and nacrite from room temperature to 455 °C. J Am Ceram Soc 69: 61–65.CrossRefGoogle Scholar
Thompson, J.R. and Hower, J.. 1973. An explanation for low radiometric ages from glauconite. Geochim Cosmochim Acta 37: 1473–1491.CrossRefGoogle Scholar
Thompson, J.R. and Hower, J.. 1975. The mineralogy of glauconite. Clays Clay Miner 23: 289–300.CrossRefGoogle Scholar
Veblen, D.R., Guthrie, G.D. Jr., Livi, K.J.T. and Reynolds, R.R. Jr. 1990. High-resolution transmission electron microscopy and electron diffraction of mixed-layer illite/smectite: Experimental results. Clays Clay Miner 38: 1–13.CrossRefGoogle Scholar
Wampler, J.M.. 1973. Age dating of rocks to assist in understanding the geological history of Georgia Piedmont area. Atlanta: Georgia Institute of Technology. Unpublished technical report for Project No. G-35-602.Google Scholar
Wampler, J.M., Thoroman, M.C. and Padan, A.. 1985. A microanalytical technique for potassium-argon analysis of clay. Geol Soc Am Abstr Programs 17: 411.Google Scholar
Weaver, C.E. and Wampler, J.M.. 1970. K, Ar, illite burial. Geol Soc Am Bull 81: 3423–3430.CrossRefGoogle Scholar
Zimmermann, J.-L. and Odin, G.S.. 1977. Cinétique de la libération de l'argon de l'eau et des composés carbonés dans le matériel de référence glauconite GL-O. Bull Minéral 102: 48–55.CrossRefGoogle Scholar
Zimmermann, J.-L. and Odin, G.S.. 1982. Kinetics of the release of argon and fluids from glauconies. In: Odin, G.S., editor. Numerical dating in stratigraphy. Chichester, UK: J Wiley. p 345–362.Google Scholar