Other Countries with Uranium Occurrences
Estonia’s only domestic source of uranium is a black shale-type deposit near the town of Sillamäe, located 185 km east of Tallinn in northeast Estonia (see Fig. 0.1 or Fig. 5.1 in Chap. 5 Finland for location).
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nd resulted in the discovery of a number of mostly small vein-, surficial-, sandstone-, and lignite-type uranium occurrences in Macedonia and Thrace Provinces of northern Greece, and uraniferous phosphate occurrences in Ipeirus Province of northwestern Greece. Some volcanic- and surficial-type uranium mineralization was discovered on islands in the Aegean Sea. Noteworthy occurrences with estimated resources in excess of 1 000 t U are situated in the Paranesti district and Serres Basin, in Macedonia Province. Characteristics of the principal localities are reported as follows. © Springer-Verlag Berlin Heidelberg 2016 F.J. Dahlkamp, Uranium Deposits of the World, DOI 10.1007/978-3-540-78554-5_21
Sources of information. OECD-NEA/IAEA (1986, 1990, 1994). Macedonia Province, Paranesti district, Rhodope metamorphic massif, mineralization related to granitoid rocks: Archontovo uni: vein and disseminated uranium, mainly autunite, esti mated in-situ resources ca. 6 000 t U; Spilia area (Vathyrema): vein-type pitchblende in granite; Ftora area: vein-type pitchblende associated with REE; Andiro: vein-type pitchblende; Loukatina, Diameso, Pefki prospects. Axioupolis, western Macedonia: uranium in veins and disseminations in magmatic rocks; Florina, northwestern Macedonia: uranium in Tertiary sandstone; Potami, eastern Macedonia: uranium in carbonaceous sand- and siltstone; Serres Tertiary Basin, central Macedonia: uranium in lignite and coaly shale, estimated resources ca. 4 000 t U (at an in-situ grade of 100 ppm U); Xanthi area, Haidou and Medoussa prospects, eastern Macedonia: uranium at contact of Eocene felsic volcanics and granitic basement. Thrace Province, Alexandropoli: vein-type pitchblende in etamorphics and Eocene volcanics. m Epirus, Drimon: uranium in phosphorite, estimated resources ca. 500 t U at an in-situ grade of 100 ppm U; Delvinaki. Ikaria Island: U in silcrete. Lesbos Island: U in volcanics.
21.3 Ireland Ireland’s uranium potential tends to be confined to some granitic plutons of Late Caledonian age, in particular to the Main Donegal Granite and Leinster Plutons in northwestern and southeastern Ireland, respectively. As described below, uranium mineralization in the Main Donegal Granite occurs in the form of uraninite-bearing pegmatites and pitchblende veinlets, whereas at the Leinster Pluton only uranium-mineralized boulders have been found. Source of information. O’Connor et al. (1984), unless otherwise cited. Located in Donegal County, the elongated Main Donegal Granite, dated at 407 ±23 Ma, is one of the latest intrusions of several granitic plutons, which were intruded 418–404 Ma ago (Halliday et al. 1980; O’Connor et al. 1982) into regionally metamorphosed and deformed Neoprecambrian and Lower Cambrian Dalradian metasediments (limestone/marble, schists, quartzite). The Main Donegal Granite is comprised of medium- to coarsegrained biotite granodiorite and younger, coarser grained, more leucocratic granite. The former facies prevails in the southeastern and the latter in the northwestern part of
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