 | | Journal (article/letter/editorial) | | ilmenite, NYG-related aplite dyke, Tibchi complex, Kalato, Nigeria E. M. SAKOMA* AND R. F. MARTIN Department...zone of the Tibchi granite, exposed at Kalato, in the Tibchi ring-complex, northern Nigeria. Inclusions...‘ferropseudobrookite’ may well have stabilized it at Kalato. Ultimately, it is transformed to hematite + rutile...fugacity, ring complex, Tibchi, northern Nigeria. Introduction THE Kalato area, in northern Nigeria, lies within...south-central part of the Mesozoic Tibchi ring complex, in the contact zone of the Tibchi A-type biotite granite |  | MacDonald, Ray, Nejbert, Krzysztof, Bagiński, Bogusław, Jurewicz, Edyta (2018) Ti–Zr–Nb-bearing accessory minerals in high-K trachyandesitic rocks from the Western Outer Carpathians, Moravia, Czech Republic. European Journal of Mineralogy, 30 (1) 135-147 doi:10.1127/ejm/2017/0029-2693 | Journal (article/letter/editorial) | | accessory minerals in igneous parageneses are complex. Even within a relatively restricted range of host-rock...microanalysis at the Inter-Institute Analytical Complex at IGMiP Faculty of Geology, University of Warsaw...Fe2þ is recalculated as Fe3þ. For compositionally complex minerals, such as chevkinite, the recalculation...on 22 oxygen basis Ca 1.274 1.058 La 1.216 1.599 Ce 1.244 1.254 Pr 0.089 0.076 Nd 0.194 0.113 Sm 0.000...4.032 0.000 4.032 3.999 0.018 4.017 S cations Ce/Ce* 13.16 1.07 13.22 0.88 13.18 1.07 13.20 0.93 |
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