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Pretreatment of Fithian illite for oxygen isotope analysis

  • A. J. C. Hogg (a1), M. J. Pearson (a1) and A. E. Fallick (a2)

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Oxygen isotope analysis of clay minerals presents several practical difficulties. These include their very fine grain size, the presence of both hydroxyl and non-hydroxyl oxygen, adsorbed water and, where clays from oil reservoirs are concerned, the possibility of hydrocarbon contamination. To develop routines which would minimize these problems while leaving the isotope systematics of the clay undisturbed, a series of oxygen isotope analyses were made under different running conditions of the API Standard Illite–the Fithian illite.

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Borthwick, J. & Harmon, R.S. (1982) A note regarding CIF3 as an alternative to BrF5 for oxygen isotope analysis. Geochim. Cosmoehim. Acta 46, 16651668.
Brindley, G.W. & Lemaitre, J. (1987) Thermal oxidation and reduction reactions of clay minerals. Pp. 319-370 in: Chemistry of Clays and Clay Minerals (A.C.D. Newman, Editor). Mineralogical Society, London.
Clayton, R.N. & Mayeda, T.K. (1963) The use of bromine pentaflnoride in the extraction of oxygen from oxides and silicates for isotopic analysis. Geochim. Cosmochim. Acta 27, 4352.
James, A.J. & Baker, D.R. (1976) Oxygen isotope exchange between illite and water at 22°. Geochim. Cosmochim. Acta 40, 235239.
Taylor, R.W., Burnham, A.K., Smith, G.S., Sanborn, R.H. & Gregory, L.S. (1985) Inorganic nitrogen in Green River Formation oil shale. Am. Chem. Soc., Div. Fuel Chem. 30, 338–348.
Weaver, C.E. & Pollard, L.D. (1973) The Chemistry of Clay Minerals. Elsevier, Amsterdam.

Pretreatment of Fithian illite for oxygen isotope analysis

  • A. J. C. Hogg (a1), M. J. Pearson (a1) and A. E. Fallick (a2)

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