 | | Journal (article/letter/editorial) | | minerals: an example from a Devonian bauxite deposit, Timan, Russia L. E. MORDBERG* Russian Research Geological...(VSEGEI), Sredny Pr. 74, St Petersburg 199106, Russia ABSTR ACT A Th-rich mineral of the crandallite...the weathering profile of the Schugorsk bauxite deposit, Timan, Russia. It occurs within thin (up to...0.5 mm) organic-rich veinlets together with βleucoxeneβ in the form of small shapeless grains which vary...simplified formula Fe2+ThSiO4(OH)2. K EY WORDS : bauxite, weathering, crandallite, woodhouseite, goyazite |  | | Journal (article/letter/editorial) | | trace elements in bauxites: the Devonian Schugorsk deposit, Russia L. E. MORDBERG1,2,3, C. J. STANLEY2 AND...Institute (VSEGEI), Sredny pr 74, St. Petersburg, Russia The Natural History Museum, Cromwell Road, London...deposition of more than 30 chemical elements during bauxite formation and epigenesis have been studied on specimens...specimens from the Devonian Schugorsk bauxite deposit, Timan, Russia. Chemical analyses of the minerals...the accessory minerals in both parent rock and bauxite is from 1 to 40 mm. However, even within these |
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