Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T20:36:20.311Z Has data issue: false hasContentIssue false
  • English
  • Français

Nano-scale microstructure of Fe3+-, OH−-bearing crystalline inclusions in experimentally oxidized olivine from a mantle nodule

Published online by Cambridge University Press:  05 July 2018

N. R. Khisina ,
K. Langer ,
M. Andrut ,
A. V. Ukhanov  and
R. Wirth
N. R. Khisina*
Affiliation:
Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygin st. 19, 117975 Moscow, Russia
K. Langer
Affiliation:
Institut für Angewandte Geowissenschaften, TU Berlin, Ernst-Reuter Pl. 1, D-10587 Berlin, Germany
M. Andrut
Affiliation:
Institut für Petrologie, Universität Wien, Geozentrum, Althanstraβe 14, A-1090 Wien, Austria
A. V. Ukhanov
Affiliation:
Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygin st. 19, 117975 Moscow, Russia
R. Wirth
Affiliation:
GeoForschungsZentrum Potsdam, Telegrafenberg C-120, D-14473 Potsdam, Germany
*
*E-mail: urusov@geol.msu.ru
Get access Rights & Permissions [Opens in a new window]

Abstract

An olivine grain from peridotite nodule 9206 (Udachnaya kimberlite) was heated in air at 700°C for 9 h. It was investigated by EMPA, by IR and UV spectroscopy and by TEM. The TEM examination reveals hexagon-like inclusions up to several hundred nm in size with a core and rim structure. The AEM data show that the inclusions contain only Mg, Fe and Si as cations. The rims have almost the same composition as the olivine matrix whereas the cores are enriched in iron and depleted in Mg. Electron diffraction data, SAED and CBED, indicate that the rims are composed of a ‘secondary’ olivine while the cores are composed of coexisting feroxyhite FeOOH, bernalite Fe(OH)3 and β-cristobalite SiO2. The presence of nm-sized inclusions in minerals is expected to influence the interpretation of spectroscopic results if spectroscopy is carried out without knowledge of the microstructure.

It is speculated that the complex microstructure of the inclusions is a result of a solid state transformation of a precursor phase, probably a hydrous magnesian silicate, during the experimental heating and oxidation.

Keywords

olivinelaihunitebernaliteelectron diffractionEELSperidotite
Type
Research Article
Information
Mineralogical Magazine , Volume 64 , Issue 2 , April 2000 , pp. 319 - 335
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bai, Q. and Kohlstedt, D.L. (1993) Effects of solubility and incorporation mechanism. Phys. Chem. Min., 19, 460–71.CrossRefGoogle Scholar
Banfield, I.F., Dyar, M.D. and McGuire, A.V. (1992) The defect microstructure of oxidised olivine from Dish Hill, California. Amer. Mineral., 77, 977–86.Google Scholar
Beran, A. and Putnis, A. (1983) A model of the OH-positions in olivine, derived from infrared spectroscopy investigations. Phys. Chem. Min., 9, 57–60.CrossRefGoogle Scholar
Bernal, J.D., Dasgupta, D.R. and Mackay, A.L. (1959) The oxides and hydroxides of iron and their structural relationships. Clay Miner. Bull., 4, 15–30.CrossRefGoogle Scholar
Birch, W.D., Pring, A., Reller, A. and Schmalle, H. (1992) Bernalite: a new ferric hydroxide with perovskite structure. Naturwiss., 79, 509–11.CrossRefGoogle Scholar
Birch, W.D., Pring, A., Reller, A. and Schmalle, H.W. (1993) Bernalite, Fe(OH)3, a new mineral from Broken Hill, New South Wales: description and structure. Amer. Mineral., 78, 827–34.Google Scholar
Burnley, P.C. and Navrotsky, A. (1996) Synthesis of high-pressure hydrous magnesium silicates: observations and analysis. Amer. Mineral., 81, 317–26.CrossRefGoogle Scholar
Champness, P.E. (1970) Nucleation and growth of iron oxides in olivine. Mineral. Mag., 37, 790–800.CrossRefGoogle Scholar
Dasgupta, D.R. (1961) Topotactic transformations in iron oxides and oxyhydroxides. Ind. J. Physics, 35, 401–19.Google Scholar
Drits, V.A., Sakharov, B.A. and Manceau, A. (1993) Structure of ferohyhite as determined by simulation of X-ray diffraction curves. Clay Miner., 28, 209–22.CrossRefGoogle Scholar
Dyar, M.D., Delaney, J.S., Sutton, S.R. and Schaefer, M. (1998) Fe3+ distribution in oxidised olivine: a synchrotron micro-XANES study. Amer. Mineral. 83, 1361–5.CrossRefGoogle Scholar
Eliseev, E.N. (1957) X-ray study of the minerals of the isomorphous series forsterite-fayalite. Zap. Vses. Min. Obshch., 86, 657–70 (in Russian).Google Scholar
Freund, F. and Oberheuser, G. (1986) Water dissolved in olivine: a single-crystal infrared study. J. Geophys. Res., 91, 745–61.CrossRefGoogle Scholar
Goldstein, J.I. and Williams, D.B. (1989) Quantitative X-ray analysis. Pp155–218 in: Principles of Analytical Electron Microscopy (Joy, D.C., Romig, A.D. and Goldstein, J.I, editors). Plenum Press, New York.Google Scholar
Griffiths, P.R. and de Hazeth, J.A. (1986) Fourier Transform Infrared Spectroscopy . Wiley & Sons, New York.Google Scholar
Heaney, P.E. (1994) Structure and chemistry of the low-pressure silica polymorphs. Pp. 1–40 in: Silica (Heaney, P.E., editor). Reviews in Mineralogy, 29, Mineralogical Society of America, Washington D.C. CrossRefGoogle Scholar
Janney, D.E. and Banfield, J.F. (1998) Distribution of cations and vacancies and the structure of defects in oxidised intermediate olivine by atomic-resolution TEM and image simulation. Amer. Mineral., 83, 799–810.CrossRefGoogle Scholar
Khisina, N.R., Khramov, D.A., Kolosov, M.V., Kleschev, A.A. and Taylor, L.A. (1995) Formation of ferriolivine and magnesioferrite from Mg-Fe-olivine: reactions and kinetics of oxidation. Phys. Chem. Min., 22, 241–50.CrossRefGoogle Scholar
Khisina, N.R., Khramov, D.A., Kleschev, A.A. and Langer, K. (1998) Laihunitization as a mechanism of olivine oxidation. Eur. J. Mineral., 10, 229–38.CrossRefGoogle Scholar
Khisina, N.R., Rusakov, V.S. and Kleschev, A.A. (1999) On the PO2-T conditions of laihunite formation. Geokhimiya, 9, 994–9.Google Scholar
Kitamura, M., Kondoh, S., Morimoto, N., Miller, G.H., Rossman, G.R. and Putnis, A. (1987) Planar OH-bearing defects in mantle olivine. Nature, 328, 143–5.CrossRefGoogle Scholar
Kohlstedt, D.L. and Vander Sande, J.B. (1975) An electron microscopy study of naturally occurring oxidation produced precipitates in iron-bearing olivines. Contrib. Mineral. Petrol., 53, 13–24.CrossRefGoogle Scholar
Kudoh, Y., Finger, L.W., Hazen, R.M., Prewitt, C.T., Kanzaki, M. and Veblen, D.R. (1993) Phase E: a high-pressure hydrous silicate with unique crystal chemistry. Phys. Chem. Min., 19, 357–60.CrossRefGoogle Scholar
Laihunite Research Group (1976) Laihunite - a new iron silicate mineral. Geochimica, 1976, 95–103.Google Scholar
Libowitsky, E. and Beran, A. (1995) OH defects in forsterite. Phys. Chem. Min., 22, 387–92.Google Scholar
Liu, L.-G. (1987) Effects of H2O on the phase behaviour of the forsterite-enstatite system at high pressures and temperatures and implications for the Earth. Phys. Earth Planet. Interiors, 49, 142–67.CrossRefGoogle Scholar
Matzyuk, S.S., Platonov, A.N. and Polshin, E.V. (1989) Spineloids from Mantle Rocks. Naukova Dumka, Kiev (in Russian).Google Scholar
McCammon, C.A., Pring, A., Keppler, H. and Sharp, T. (1995) A study of bernalite, Fe(OH)3, using Mössbauer spectroscopy, optical spectroscopy and transmission electron microscopy. Phys. Chem. Min., 22, 11–20.CrossRefGoogle Scholar
McCammon, C.A., Smyth, J.R., Laustsen, H.M.S. and Ross, N.L. (1999) Oxidation state of iron in hydrous silicate phases. J. Conf. Abstr., 4, 653.Google Scholar
Mernagh, T.P. and Liu, L.-G. (1998) Raman and infrared spectra of Phase E, a plausible hydrous phase in the mantle. Canad. Mineral., 36, 1217–23.Google Scholar
Miller, G.H., Rossman, G.R. and Harlow, G.E. (1987) The natural occurrence of hydroxyl in olivine. Phys. Chem. Min., 14, 461–72.CrossRefGoogle Scholar
Prewitt, C.T., Yang, H. and Frost, D.J. (1997) Current status of the DHMS alphabet phases. EOS, F729–F730.Google Scholar
Strunz, A. (1970) Mineralogische Tabellen. Akademische Verlags gesellschaft Geest & Portig K.-G, Leipzig.Google Scholar
Thompson, A.B. (1992) Water in the Earth’s upper mantle. Nature, 358, 295–302.CrossRefGoogle Scholar
Ukhanov, A.V., Ryabchikov, I.D. and Kharkiv, A.D. (1988) Lithospheric Mantle of the Yakutiya Kimberlite Province. Nauka, Moscow (in Russian).Google Scholar
Urusov, V.S., Tauson, V.L. and Akimov, V.A. (1997) Solid State Geochemistry. Moscow, GEOS’, 500 pp (in Russian).Google Scholar
van Aken, P.A., Liebscher, B. and Styrsa, V.J. (1998) Core level electron energy loss spectra of minerals: pre-edge fine structures at the oxygen K-edge. Phys. Chem. Min., 25, 494–8.CrossRefGoogle Scholar
Wirth, R. (1997) Water in minerals detectable by electron energy-loss spectroscopy EELS. Phys. Chem. Min., 24, 561–8.CrossRefGoogle Scholar
Young, T.E., Green, H.W. II, Hofmeister, A.M. and Walker, D. (1993) Infrared spectroscopy investigation of hydroxyl in -(Mg,Fe)2SiO4 and coexisting olivine: implications for mantle evolution and dynamics. Phys. Chem. Min., 19, 409–22.CrossRefGoogle Scholar