 | | Journal (article/letter/editorial) | | ages obtained from different rock types of the Katuma Block in the NW Ubendian Belt. Geothermobarometry...with the age of deposition of sediments in the Katuma Block, as deduced from the age of detrital zircon...(Boniface and Schenk, 2012). 2.2. Katuma Block The rocks of the Katuma Block of the northwestern Ubendian...(Semyanov et al., 1977; Smirnov et al., 1970): the Katuma Group consisting primarily of metabasites, gabbronorites...mainly of metasediments (Fig. 1b). The rocks of the Katuma Group formed mainly during Neoarchean time (2.71–2 |  | | Journal (article/letter/editorial) | | The age of gold–copper–lead mineralization in the Katuma Block of the Ubendian Belt remains controversial...adjoins with a tectonic contact the vein-bearing Katuma Block to the southwest. The obtained distinct monazite...formation of the gold– copper–lead veins in the Katuma Block. Keywords Monazite dating · Kibaran orogeny...Pohl 1994 and Daly 1988). b Geological map of Katuma Block modified after Biyashev et al. (1977), Semyanov...and a second in the Mpanda mineral field in the Katuma Block (Fig. 1a, b). Attempts to date, the Mpanda |  | | Journal (article/letter/editorial) | | meta-igneous and metasedimentary rock types of the Katuma Block of the Paleoproterozoic Ubendian Belt in...granitic intrusions at 1990–1940 Ma. All rocks of the Katuma Block experienced their main metamorphic reworking...metasedimentary rocks derived from Neoarchean (Katuma Block or Tanzania Craton?) and Paleoproterozoic...ages, we suggest that in Paleoproterozoic time the Katuma Block was again at an active continental margin...subdivided into eight crustal blocks, namely the Katuma, Wakole, Ubende, Ufipa, Mbozi, Lupa, Nyika and Upangwa |  | | Journal (article/letter/editorial) | | into eight terranes, namely the Ubende, Wakole, Katuma, Ufipa, Mbozi, Lupa, Upagwa, and Nyika lithotectonic...are composed of omphacite (clinopyroxene)–garnet–rutile–apatite–quartz–zircon as the peak mineral assemblage...omphacite and garnet occupy up to 90% by volume. Rutile, reaching up to 0.5 mm in diameter, is a common...Garnet contains prograde inclusions of plagioclase, rutile, quartz and omphacite (Fig. 4A). Abundant plagioclase–diopside...garnet (XAb = 0.63 − 0.68; Table 3; see Footnote 1). Rutile coexisting with zircon and quartz has average Zr |  | | Journal (issue) | | H R O M E VANADIUM TANTALITE C O L U M B I T E RUTILE I L M E N I T E B E R Y L Z I R C O N AND O T H...pegmatite carrying appreciable amounts of monazite and rutile. I n eastern Uganda a granite containing thorite...private operator. I n Oyo Province an occurrence of rutile in Ife-Ilesha Division and one of ilmenite in Ekiti...that the clays were weakly magnetic. Workings at Katuma were also visited and the presence of an ore-body...296-303, figs., photos. Tytyre mine (limestone, Finland). Mine & Quarry Engng, 1958, Vol. 24, No. 5, 186-199 |
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