Olivine basalts from southern Egypt were studied by 57Fe Mössbauer spectroscopy at 297 and 77 K, and by optical microscopy and X-ray diffraction. The 57Fe Mössbauer spectra show three-magnetic sextets, three doublets of ferrous (Fe2+), and a weak ferric (Fe3+) doublet that is attributable to a nanophase oxide (npOx). The magnetic sextets relate to titanomagnetite and the Fe2+ doublets to olivine, pyroxene, and ulvöspinel. Variations in the hyperfine parameters of the various Fe components are attributed to changes in the local crystal chemistry. The intensity of oxidation (Fe3+/ΣFe) in the rocks varies from 20-27% with the oxidized iron largely residing in the titanomagnetite.
If the inline PDF is not rendering correctly, you can download the PDF file here.
Agresti, D. (2012). Temperature dependence of the quadrupole splitting of olivine and pyroxene from Plains of Gusev Crater on Mars. Hyperfine Interactions, 208(1-3), 117-121. DOI: 10.1007/s10751-011-0405-6.
Audunnson, H., Levi, S., & Hodges, F. (1992) Magnetic property zonation in a thick lava flow. Journal of Geophysical Research, 97(B4), 4349-4360. DOI: 10.1029/91JB01508.
Cadogan, J.M., & Devlin, E.J. (2012). Mössbauer study of the Ordinary-Chondrite meterorite Thylacine Hole-001. Hyperfine Interactions, 208(1-3), 91-94 (2012). DOI: 10.1007/s10751-011-0417-2.
Christie, D.M., Carmichael, I.S.E., & Langmuir, C.H. (1986). Oxidation states of mid-ocean ridge basalt glasses. Earth and Planetary Science Letters, 79, 397-411. http://dx.doi.org/10.1016/0012-821X(86)90195-0.
Egyptian Geological Survey and Mining Authority (1982). Geological map of Egypt, scale 1:2,000,000. Abbasyia, Cairo, Egypt: Geological Survey and Mining Authority.
Franz, G., Puchelt, H., & Pasteels, P. (1983). Petrology, geochemistry and age relations of Triassic and Tertiary volcanic rocks from SW Egypt and NW Sudan. Journal of African Earth Sciences, 6, 335-352. http://dx.doi.org/10.1016/0899-5362(87)90077-7.
Gunnlaugsson, H.P., Rasmussen, H., Kristjánsson, L., Steinthorsson, Helgason, Ö., Nørnberg, P., Madsen, M.B., & Mørup, S. (2008). Mössbauer spectroscopy of magnetic minerals in basalt on Earth and Mars. Hyperfine Interactions, 182(1-3), 87-101. DOI: 10.1007/s10751-008-9714-9.
Hassan, K.M. (2009b). Characterization of granites by 57Fe Mössbauer spectroscopy. Mineralogia, 40(1-4), 95-106. DOI: 10.2478/v10002-009-0008-x.
Hassan, K.M. (2010). Valences and site characteristics of iron in radioactive magmatic veins (Egypt): A Mössbauer and chemical study. Mineralogia, 41(1-2), 23-33. DOI: 10.2478/v10002-010-0003-2.
Hill, R.E.T., & Roeder, P.L. (1974). The crystallization of spinel from basaltic liquid as a function of oxygen fugacity. Journal of Geology, 82, 709-729.
Ingalls, R. (1964). Electric-field gradient tensor in ferrous compounds. Physical Review, 133(3A), 787-795. DOI: 10.1103/PhysRev.133.A787.
Kress V.C., & Carmichael I.S.E. (1991). The compressibility of silicate liquids containing Fe2O3 and the effect of composition, temperature, oxygen fugacity and pressure on their redox states. Contributions to Mineralogy and Petrology, 108, 82-92. DOI: 10.1007/BF00307328.
List, F.K., El-Gaby, S., & Tehrani, R. (1989). The basement rocks in the Eastern and Western Deserts and Sinai. In M. Hermina, E., Klitzsch & S. List (Eds.), Stratigraphic lexicon and explanatory note to the geologic map of Egypt 1:500000 (pp. 33-56). Cairo, Egypt: Egyptian General Petroleum Corporation.
McCanta, C., Rutherford, M.D., Dyar, M.D., & Delaney, J.S. (2003). Fe3+/ΣFe ratios in pigeonite as a function of ƒO2: a preliminary investigation. Proceedings - 34th Lunar and Planetary Science Conference, 17-21 March 2003 (Abstract 1361). Lunar and Planetary Institute. League City, Texas, U.S.A.
Menzies, O.N., Bland, P.A., & Berry, F.J. (2001). An 57Fe Mössbauer study of the olivine solid solution series: Implications for meteorite classification and deconvolution of unequilibrated chondrite spectra. Proceedings -32nd Lunar and Planetary Science Conference, 12-16 March 2003 (Abstract 1622). Lunar and Planetary Institute. League City, Texas, U.S.A.
Morris, R.V., McKay, G.A., Agresti, D.G., & Li, L. (2008). Mössbauer and electron microprobe studies of density separates of Martian Nakhlite MIL03346: Implications for interpretation of Mössbauer spectra acquired by the Mars exploration rovers. Proceedings - 39th Lunar and Planetary Science Conference, 10-14 March 2008 (Abstract 2458). Lunar and Planetary Institute. League City, Texas, U.S.A.
O'Reilly, W. (1984). Rock and mineral magnetism. Glasgow and London/ New York: Blackie/Chapman and Hill.
Patrusheva, D.G., Oshtrakh, M.I., Petrova, E.V., Grokhovsky, V.I., & Semionkin, V.A. (2010). 57Fe hyperfine interactions in M1 and M2 sites of olivine from Omolon meteorite: study using Mössbauer spectroscopy. Hyperfine Interactions, 197(1-3), 295-300. DOI: 10.1007/s10751-010-0188-1.
Satir, M., Morteani, G., & Fuganti, A. (1991). K-Ar ages, Sr-isotopic compositions and chemistry of late Cretaceous-Tertairy basalts from the Nubian Desert (northern Sudan). European Journal of Mineralogy, 3, 943-955.
Soresu, M., Xu, T., Wise, A., Diaz-Míchelens, M., & McHenry, M.E. (2012). Studies on structural, magnetic and thermal properties of xFe2TiO4-(1−x)Fe3O4 (0≤x≤1) Pseudo-binary System. Journal of Magnetism and Magnetic Materials, 324, 1453-1462. http://dx.doi.org/10.1016/j.jmmm.2011.12.012.
Wikipedia Foundation, Inc. (2013). Ulvöspinel. Retrieved March 29, 2013, from http://en.wikipedia.org/wiki/Ulvöspinel.
Žák, T., & Jirásková, Y. (2006). Confit: Mössbauer spectra fitting program. Surface and Interface Analysis, 38(4), 710-714. DOI: 10.1002/sia.2285.