 | | Journal (article/letter/editorial) | | U-PbColumbite Ageof Neoproterozoic Ta-NbMineralization in Burundi ROLF L. ROMER Department of AppliedGeology, Lule•...ofcolumbite fromtheKivuvu andRuhembe pegmatites in Burundi precisely determines the ageof the mineralization...provincearelocatedin easternZaireandRwanda.Economiin Burundi callylessimportantore deposits in southern Uganda...centuryandwasfocusedon goldand eassiterite, whereas Zaire, Burundi,westernmostTanzania,and Rwandato southwolframite...riftingof the Archcan niobium-tin production of Burundi isfromsluicing of alluvial to Paleoproterozoic |  | | Journal (article/letter/editorial) | | hydrothermal quartz veins. Many deposits in the province occur in siliciclastic metasedimentary, or metabasaltic...platinum) province; and the early Neoproterozoic (1 Ga) Kibara rare metal and gold province that is the...application of modern concepts and technologies, this province is drastically underexplored. Keywords: Gold,...felsic intrusions. Geographically, this giant metal province comprises Kivu and Maniema, as well as major portions...Republic of the Congo (DRC). It also includes Burundi and Rwanda, and marginal territories of Tanzania |  | | Journal (article/letter/editorial) | | Northweststriking lineament - the Ruhembe Transfer Fault (RTF). The Ruhembe Transfer Fault is a major dextral...- Gombati Transfer Zone RF - Ruaha Fault RTF - Ruhembe Transfer Fault SOUTH AFRICAN JOURNAL OF GEOLOGY...0.0 - 53.3 3.4 0.0 - 15.0 7.2 0.0 - 16.4 Muscovite 0.0 0.0 - 0.0 0.7 0.0 - 2.7 1.1 0.0 -...content. Accessory mineral components comprise muscovite, chlorite, hornblende, garnet, epidote, apatite...points to a pre- or synorogenic intrusive origin. Muscovite and biotite occur as minor to accessory constituents |  | Graupner, T., Melcher, F., Gäbler, H.-E., Sitnikova, M., Brätz, H., Bahr, A. (2010) Rare earth element geochemistry of columbite-group minerals: LA-ICP-MS data. Mineralogical Magazine, 74 (4) 691-713 doi:10.1180/minmag.2010.074.4.691 | Journal (article/letter/editorial) | | melt. In general, CGM from each individual Ta-ore province are characterized by a predominance of one type...age; and (4) the Morrua pegmatite, Alto Ligonha Province, Mozambique, of Pan-African age. Results and discussion...pegmatite areas within the Alto Ligonha pegmatite province in Mozambique (10 samples), clearly confirms this...district, Bauchi Province, Nigeria Jantar tin mines, Kuru Camp, near Bukuru, Bauchi Province, Nigeria Lema...Kantata, Abuki polygone, Pangi, Kivu DRC Ruhembe, NW Burundi C1 (Tecklenberg) pegmatite, SW of Uis, Cape |  | | Journal (article/letter/editorial) | | analyzed columbite-tantalite. Shaded area: Yellow muscovite reflecting reducing conditions of pegmatite crystallization...ridges that have been more resistent to leaching (Ruhembe; Romer and Lehmann, 1995) 248 R.L. Romer et...Norr6, Hoting, and Rgmegt) to andalusite-biotite-muscovite-bearing rocks at lower amphibolite grade (Varutrfisk...3n, and 30 indicates the occurrence of yellow muscovite and reflects reducing crystallization conditions...obtained from muscovite, whose color changes in dependence of Fe 3 +; white to yellow muscovite is Fetot- |  | | Book | | MINERALS& GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published...page: Spessartine garnet crystal embedded in muscovite schist matrix, 4.3 cm - Bruce Cairncross specimen...of East Africa 10 East African resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological...commonly known that neighbouring Uganda, Rwanda and Burundi are also sources of some interesting material (for...overview of each of the five featured countries - Burundi, Kenya, Rwanda, Tanzania and Uganda - and introduces |
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