The geochemistry and oxidation state of podiform chromitites from the mantle section of the Oman ophiolite: A review
Journal article
Rollinson, Hugh and Adetunji, Jacob 2015. The geochemistry and oxidation state of podiform chromitites from the mantle section of the Oman ophiolite: A review. Gondwana Research. 27 (2), pp. 1-12. https://doi.org/10.1016/j.gr.2013.07.013
| Authors | Rollinson, Hugh and Adetunji, Jacob |
|---|---|
| Abstract | Data are presented for mantle podiform chromitites from eight localities over 350 km strike length of the Oman ophiolite. Chromitite compositions form a continuum from cr# = 0.501 to 0.769, although this conflates a number of different magmatic ‘events’. The Oman mantle chromitites record a wide range of Fe3 +/ΣFe ratios (as determined by Mössbauer spectroscopy) extending from low values (close to those of MORB) to values higher than currently found in arc magmas and calculated oxygen fugacities for the chromites are about 1.8 log units above the QFM buffer, higher than found in the MORB source. Calculated TiO2 and Al2O3 contents for the parental melts to the Oman chromitites show that they had low TiO2 contents (0.23–0.96 wt.%) but a range of Al2O3 contents (11.8–15.8 wt.%). The variable Al2O3 content implies a range of parental magma compositions, probably formed at different temperatures, and the range of TiO2 compositions indicates that some melts were modified by reaction during their transit through the mantle. The range of compositions observed is not consistent with either a MORB or Arc source but is thought to reflect a range of melts derived from a compositionally evolving source during subduction initiation in a forearc environment |
| Keywords | Ophiolite; Chromitite; Geochemistry; Petrogenesis; Oman |
| Year | 2015 |
| Journal | Gondwana Research |
| Journal citation | 27 (2), pp. 1-12 |
| Publisher | Elsevier |
| ISSN | 1342-937X |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.gr.2013.07.013 |
| Web address (URL) | https://www.sciencedirect.com/science/article/pii/S1342937X13002402?via%3Dihub |
| hdl:10545/621578 | |
| Output status | Published |
| Publication dates | 01 Aug 2013 |
| Publication process dates | |
| Deposited | 02 May 2017, 15:12 |
| Accepted | 05 Jul 2013 |
| Contributors | University of Derby |
| File | File Access Level Restricted |
Permalink -
https://repository.derby.ac.uk/item/933ww/the-geochemistry-and-oxidation-state-of-podiform-chromitites-from-the-mantle-section-of-the-oman-ophiolite-a-review
56
total views0
total downloads4
views this month0
downloads this month
Export as
Related outputs
The significance of water in the genesis of ophiolitic chromitites
Rollinson, H. 2025. The significance of water in the genesis of ophiolitic chromitites. Lithos. 502–503. https://doi.org/10.1016/j.lithos.2025.108022Do all Archaean TTG rock compositions represent former melts
Rollinson, H. 2025. Do all Archaean TTG rock compositions represent former melts. Precambrian Research. 367, pp. 1-13. https://doi.org/10.1016/j.precamres.2021.106448Zircon trace element geochemistry of the neoarchaean late-granite suites along the southern margin of the Zimbabwe craton, Zimbabwe
Chagondah, G. S., Elburg, M. A., Hofmann, A., Rollinson, H., Ueckermann, H. and Vorster, C. 2025. Zircon trace element geochemistry of the neoarchaean late-granite suites along the southern margin of the Zimbabwe craton, Zimbabwe. Journal of African Earth Sciences. 228, pp. 1-13. https://doi.org/10.1016/j.jafrearsci.2025.105619Neoarchaean and Palaeoproterozoic tectono-metamorphic events along the southern margin of the Zimbabwe craton: Insights from muscovite 40Ar/39Ar geochronology from rare-metal pegmatites, Zimbabwe
Chagondah, G. S., Kramers, J. D., Hofmann, A. and Rollinson, H. 2024. Neoarchaean and Palaeoproterozoic tectono-metamorphic events along the southern margin of the Zimbabwe craton: Insights from muscovite 40Ar/39Ar geochronology from rare-metal pegmatites, Zimbabwe. Journal of African Earth Sciences . 217, pp. 1-12.Magma mingling in plagiogranites of the Oman ophiolite suggests an origin by fractional crystallisation
Rollinson, H. 2024. Magma mingling in plagiogranites of the Oman ophiolite suggests an origin by fractional crystallisation. Lithos. 482-483, pp. 1-12. https://doi.org/10.1016/j.lithos.2024.107725The late Archaean granite paradox: A case study from the Zimbabwe Craton
Rollinson, H., Chagondah, G. and Hofmann, A. 2024. The late Archaean granite paradox: A case study from the Zimbabwe Craton. Precambrian Research. 410, pp. 1-11. https://doi.org/10.1016/j.precamres.2024.107491Ferric iron in chrome-bearing spinels: implications for microprobe correction procedures
Rollinson, H. and Adetunji, J. 2023. Ferric iron in chrome-bearing spinels: implications for microprobe correction procedures. Mineralogical Magazine. 87 (5), pp. 702-710.. https://doi.org/10.1180/mgm.2023.68The growth of the Zimbabwe craton during the Neoarchaean
Rollinson, H. 2023. The growth of the Zimbabwe craton during the Neoarchaean. Contributions to Mineralogy and Petrology. 178, pp. 1-16. https://doi.org/10.1007/s00410-022-01978-7The rare earth element geochemistry of mafic granulites from the Neoarchaean northern marginal zone of the Limpopo Belt
Rollinson, H. 2022. The rare earth element geochemistry of mafic granulites from the Neoarchaean northern marginal zone of the Limpopo Belt. Journal of African Earth Sciences. 186, pp. 1-12. https://doi.org/10.1016/j.jafrearsci.2021.104434The origin of the Earth’s continental crust
Rollinson, H. 2021. The origin of the Earth’s continental crust. Teaching Earth Sciences. 46, pp. 38-43.No plate tectonics necessary to explain Eoarchean rocks at Isua (Greenland)
Rollinson, H. 2021. No plate tectonics necessary to explain Eoarchean rocks at Isua (Greenland). Geology. 50 (2), p. 147–151. https://doi.org/10.1130/G49278.1The eastern French Pyrenees: from mountain belt to foreland basin
Satterfield, Dorothy, Rollinson, H. and Suthren, Roger 2019. The eastern French Pyrenees: from mountain belt to foreland basin. Geology Today. 35 (6), pp. 228-240. https://doi.org/10.1111/gto.12291Polymineralic inclusions in mantle chromitites from the Oman ophiolite indicate a highly magnesian parental melt
Rollinson, H., Mameri, L. and Barry, T. 2018. Polymineralic inclusions in mantle chromitites from the Oman ophiolite indicate a highly magnesian parental melt. Lithos. 310–311, pp. 381-391. https://doi.org/10.1016/j.lithos.2018.04.024
Trevorite: Ni-rich spinel formed by metasomatism and desulfurization processes at Bon Accord, South Africa?
O'Driscoll, Brian, Clay, Patricia L., Cawthorn, R. Grant, Lenaz, Davide, Adetunji, Jacob and Kronz, Andreas 2014. Trevorite: Ni-rich spinel formed by metasomatism and desulfurization processes at Bon Accord, South Africa? Mineralogical Magazine. https://doi.org/10.1180/minmag.2014.078.1.11UK pension changes in 2015: some mathematical considerations
Stubbs, John and Adetunji, Jacob 2016. UK pension changes in 2015: some mathematical considerations. The Mathematical Gazette. https://doi.org/10.1017/mag.2016.55Explainer: what dust from the Sahara does to you and the planet
Adetunji, Jacob 2016. Explainer: what dust from the Sahara does to you and the planet. The Conversation.Low temperature, authigenic illite and carbonates in a mixed dolomite-clastic lagoonal and pedogenic setting, Spanish Central System, Spain
Huggett, Jennifer, Cuadros, Javier, Gale, Andrew S., Wray, David and Adetunji, Jacob 2016. Low temperature, authigenic illite and carbonates in a mixed dolomite-clastic lagoonal and pedogenic setting, Spanish Central System, Spain. Applied Clay Science. https://doi.org/10.1016/j.clay.2016.06.01657Fe Mössbauer spectroscopy investigations of iron oxidation states in the Harmattan dust nutrient contribution to West African soils
Adetunji, Jacob 2014. 57Fe Mössbauer spectroscopy investigations of iron oxidation states in the Harmattan dust nutrient contribution to West African soils. Atmospheric Environment. https://doi.org/10.1016/j.atmosenv.2014.09.025