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titanian spinel

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Journal Article

Representation of compositions in complex titanian spinels and application to the De Beers kimberlite

Jill Dill Pasteris
Published: 01 April 1982
American Mineralogist (1982) 67 (3-4): 244–250.
... in the original spinel prism plot. Attempts have been presented in the literature for direct adaptation of the prism plot by replacing ferric iron endmembers with titanian ones. However, the unique structural formula of titanian spinels changes the configuration of the spinel prism. More importantly, commonly...
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Insights into the redox history of the NWA 1068/1110 martian basalt from mineral equilibria and vanadium oxybarometry

Christopher D.K. Herd
Published: 01 October 2006
American Mineralogist (2006) 91 (10): 1616–1627.
DOI: https://doi.org/10.2138/am.2006.2104
... to titanian rims, and lacks the chromite-ulvöspinel miscibility gap. Co-crystallizing olivine + pyroxene + spinel and ulvöspinel + ilmenite assemblages were identified on the basis of compositional and textural criteria, and were used to determine the oxygen fugacity from the earliest to the latest stages...
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Journal Article

Unusual titanian-chromian spinels from the Eastern Bushveld Complex

Eugene N. Cameron, Glover, Everett D. Glover, Glover
Published: 01 April 1973
American Mineralogist (1973) 58 (3-4_Part_1): 172–188.
...Eugene N. Cameron, Glover; Everett D. Glover, Glover Abstract Spinels in mafic replacement pegmatites of the eastern Bushveld Complex form an unbroken series from Ti-poor chromite to Cr-poor titanomagnetite. The series is characterized by progressive substitution of Fe and Ti for Mg, Al, and Cr...
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The Marathon Dikes; I, Zirconium-rich titanian garnets and manganoan magnesian ulvoespinel-magnetite spinels

R. G. Platt, R. H. Mitchell
Published: 01 June 1979
American Mineralogist (1979) 64 (5-6): 546–550.
...R. G. Platt; R. H. Mitchell Abstract The Marathon Dikes are a large group of predominantly Proterozoic Keweenawan dikes, of highly variable character, near Marathon, N.W. Ontario. Rare zirconium-rich titanian garnets and unusual manganoan magnesian ulvöspinel-magnetite series spinels have been...
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Journal Article

Titanian Chromite and Chromian Titanomagnetite from a Snake River Plain Basalt, A Terrestrial Analogue to Lunar Spinels

Robert N. Thompson
Published: 01 October 1973
American Mineralogist (1973) 58 (9-10): 826–830.
...Robert N. Thompson Abstract An Upper Pleistocene vitrophyric pillow basalt from the Snake River Plain, southern Idaho, contains a small amount of spinel microphenocrysts. Electron microprobe analyses show that these are continuously zoned with a composition range intermediate between the chromites...
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Back-scattered electron (BSE) images of <span class="search-highlight">spinel</span> textures in NWA 1068; ol = o...

Back-scattered electron (BSE) images of spinel textures in NWA 1068; ol = o...

Published: 01 October 2006
F igure 2. Back-scattered electron (BSE) images of spinel textures in NWA 1068; ol = olivine, px = pyroxene, pl = plagioclase (maskelynite), ilm = ilmenite. ( a ) Type 1 chromite grains in olivine core host. ( b ) Type 2 spinel with chromite core and titanian inner and outer (exsolved) rim. ( c
Journal Article

Mineralogy of the Marepalli lamproite dyke from the Nalgonda district, Telangana, Southern India

Jaspreet Saini, Parminder Kaur, Roger H. Mitchell, Gurmeet Kaur
Published: 22 June 2022
Mineralogical Magazine (2022) 86 (5): 799–813.
DOI: https://doi.org/10.1180/mgm.2022.49
..., fluorapatite and Al-poor diopside embedded in groundmass consisting mainly of poikilitic Fe-rich titanian phlogopite and potassic amphibole. Other groundmass minerals are Al-Na-poor diopside, Al-poor spinels (titanian magnesian chromites to titanian chromites), Sr-rich fluorapatite and late-stage interstitial...
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Journal Article

HYPOGENE TITANIAN, VANADIAN MAGHEMITE IN REWORKED OXIDE CUMULATES IN THE BEJA LAYERED GABBRO COMPLEX, ODIVELAS, SOUTHEASTERN PORTUGAL

Ana P. Jesus, António Mateus,