 | | Journal (article/letter/editorial) | | Pegmatitic Rocks and Minerals in the Kenticha Belt, Southern Ethiopia: Implication to Geological Setting...Ababa University, P. 0.Box 1176, Addis Ababa, Ethiopia (Manuscript received April 18, 2000; accepted...pegmatites, alaskites) and minerals from the Kenticha pegmatite field. The data shed light on the evolution...granite-pegmatites and associated mineralization in the Kenticha belt. The complex mineralization of commercial...signatures of the suite of felsic rocks of the Kenticha belt are predominantly similar to those generated |  | Küster, Dirk, Romer, Rolf L., Tolessa, Dandena, Zerihun, Desta, Bheemalingeswara, K., Melcher, Frank, Oberthür, Thomas (2009) The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, U–Pb age and Ta mineralization. Mineralium Deposita, 44 (7) 723-750 doi:10.1007/s00126-009-0240-8 | Journal (article/letter/editorial) | | 1007/s00126-009-0240-8 ARTICLE The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, U–Pb...Springer-Verlag 2009 Abstract The Kenticha rare-element pegmatite, a globally important tantalite source...source in the Neoproterozoic Adola Belt of southern Ethiopia, is a highly fractionated, huge (2,000 m long...rareelement pegmatite class and belongs to the lithium–cesium– tantalum petrogenetic family. The Kenticha pegmatite...an internal geochemical differentiation of the pegmatite sheet proceeding from the lower zone (K/Rb ~36 |  | | Journal (article/letter/editorial) | | the PanAfrican Rocks of the Adola Area, Southern Ethiopia Solomon Tadesse Depnutnienf of Geology and Geophysics...Adola volcano-sedimentary sequence, in southern Ethiopia. Two major mineralized belts can be recognized:...recognized: the Megado ('Gold Belt') and the Kenticha Belts. The Kenticha Belt is also known for its rare metal...meta-arkoses - auriferous quartz veins in high grade gneiss rocks This classification provides a useful guide...exploration programme Key words: Adola, gold, Kenticha, Lega Dembi, Pan-African, rare metal, Sakaro. |  | Mogessie, A., Krenn, K., Schaflechner, J., Koch, U., Egger, T., Goritchnig, B., Kosednar, B., Pichler, H., Ofner, L., Bauernfeind, D., Tadesse, S., Demessie, M. (2002) A geological excursion to the Mesozoic sediments of the Abay Basin (Blue Nile), recent volcanics of the Ethiopian main rift and basement rocks of the Adola Rea, Ethiopia. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 147. | Journal (article/letter/editorial) | | MAIN RIFT AND BASEMENT ROCKS OF THE ADOLA REA, ETHIOPIA by A. Mogessie, K. Krenn, J. Schaflechner, U...Addis Ababa University, Ethiopia 2Ethiopian Institute of Geological Surveys Ethiopia 43 44 1. GENERAL...INTRODUCTION The field excursion to Ethiopia took place from April 5 to 22, 2001. Ethiopia has a varied geology and...making up the Ethiopian plateau; ii) the Main Ethiopia Rift containing a number of lakes and geothermal...fields and iii) the Adola gold belt including the Kenticha tantalum-bearing pegmatites (Fig. 1). Nine earth |  | | Journal (article/letter/editorial) | | evolution of the Neoproterozoic Adola Belt of southern Ethiopia: evidence for a Wilson Cycle process and implications...September 1995 Abstract The Adola Belt of southern Ethiopia comprises three major lithotectonic units: (i)...rocks and associated pelitic metasediments of the Kenticha terrain; (ii) high-grade gneisses and schists...continental margin and formation of ocean floor in the Kenticha Terrain, Wdirected subduction, arc development... Introduction The A d o l a Belt of southern Ethiopia (Fig. 1 ) is one of the major Neoproterozoic shear |  | | Journal (article/letter/editorial) | | Southern Ethiopia Tadesse Yihunie', Mamoru Adachi2 and Makoto Takeuchi2 Geological Survey of Ethiopia, P.O...O. Box 2302, Addis Abeba, Ethiopia, E-mail: yihunie63yahoo.com Department of Earth and Planetary Sciences...constitute the Kenticha, Alghe and Bulbul litho-tectonic domains in the Negele area of southern Ethiopia. Structural...relationships in semi-pelitic schistdgneisses of the Kenticha and Alghe domains, three episodes of metamorphic...590-640"C, and pressures of 4-5 kb and &7 kb in the Kenticha and Alghe domains, respectively. These results |  | | Journal (article/letter/editorial) | | (mainly Rwanda and the DR Congo), around the Kenticha mine (Ethiopia) and in the Alto Ligonha Province (Mozambique)...(Mozambique), the Arabian-Nubian Shield (Egypt, Ethiopia) and the Tantalite Valley pegmatites (southern...1992; Černý et al., 2005). The provenance of pegmatite magmas remains poorly understood. Based on a study...affiliation and rare-element signature of the granite-pegmatite systems”. Peraluminous granites and associated...Democratic Republic of the Congo (DRC), Mozambique, Ethiopia, Nigeria and Burundi (Table 1). Notably, the majority |  | | Journal (article/letter/editorial) | | the ophiolitic fold and thrust belts of southern Ethiopia: constraints on the tectonic regime during the...Neoproterozoic ophiolitic belts in southern Ethiopia—Megado, Kenticha, Moyale-El Kur and Bulbul. The mafic rocks...geochemistry, similar to that reported from the Kenticha Belt. Several samples from the Geleba area and...tectonic evolution of the Neoproterozoic of southern Ethiopia. © 2002 Elsevier Science B.V. All rights reserved...157–183 1. Introduction The Precambrian of southern Ethiopia, which consists of high-grade ortho- and para-gneisses |  | | Journal (article/letter/editorial) | | Structure of Precambrian Rocks in the Adola Goldfield (Ethiopia) based on Two Generations of Interference Pattern...Institute of Geological Survey of Ethiopia, P.O. Box 5580, Addis Ababa (Ethiopia) (Received December 71 1987;...structure of Precambrian rocks in the Adola Goldfield (Ethiopia) based on two generations of interference pattern...mapped in Precambrian rocks of the Adola Goldfield (Ethiopia). The F2 phase folded pre-existing planes (D1)...been active in the !ate Precambrian of southern Ethiopia. Introduction It is now generally accepted that |  | | Journal (article/letter/editorial) | | southern Ethiopia Lulu Tsige a , Mohamed G. Abdelsalam b,∗ a Geological Survey of Ethiopia, Department...Regional Mapping, Addis Ababa, P.O. Box 2302, Ethiopia b The University of Texas at Dallas, Department...metamorphic data from the Bulbul Belt in southern Ethiopia indicating that the latest phase of the Neoproterozoic...migmatitic layering that is not evident elsewhere in the region. This older planar fabric is discordantly overprinted...the Neoproterozoic N-trending belts in southern Ethiopia were roots of northward expulsion of the Arabian-Nubian |  | | Journal (article/letter/editorial) | | PRECAMBRIAN PODIFORM CHROMITITES FROM KENTICHA HILL, SOUTHERN ETHIOPIA F. F. BONAVIA,* Universitd Pierreet...tinizedperidotitesbelongingto a metamorphic belt Kenticha Hill Chromitites that isLate Proterozoicin age...mineralogy,minDetailed mapping (Bogliotti, 1989) at Kenticha eral chemistry,and platinum-groupelement (PGE)...Precambrianrocks of southern On the eastern flank of Kenticha Hill, at an elevaEthiopiaare a three-foldsuccession;...pesof alterblende schist,amphibole-plagioclase gneiss(metaation, mainly related to serpentinizationand |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | Schist Belt (western Zimbabwe) 4.3.3. Orange River Pegmatite Belt (Namibia, South Africa) AC 4.3.3.1. Radiometric...data 4.4.1.2. Mineralogy 4.4.2. Pegmatites of Ethiopia and Somalia 4.4.2.1. Radiometric data 4.4.2.2...3.2. Kamativi Schist Belt 5.3.3. Orange River Pegmatite Belt 5.4. Late Neoproterozoic to early Paleozoic...the Eastern Desert (Egypt) 5.4.2. Pegmatites of Ethiopia and Somalia 5.4.3. Alto-Ligonha Province (Mozambique)...presented for 13 rare-element granite NU and pegmatite districts in Africa, covering Archean, Paleoproterozoic |  | Aurisicchio, Carlo, Conte, Aida M., Medeghini, Laura, Ottolini, Luisa, De Vito, Caterina (2018) Major and trace element geochemistry of emerald from several deposits: Implications for genetic models and classification schemes. Ore Geology Reviews, 94. 351-366 doi:10.1016/j.oregeorev.2018.02.001 | Journal (article/letter/editorial) | | distinguishes the emerald deposits related to granite-pegmatite intrusion from those controlled by tectonic structures...the phlogopitebearing contact zones, between pegmatite and surrounding Cr-bearing mafic-ultramafic rocks...Thomas and Davidson, 2010) occurring in fine-grained gneiss, schist, granulite, migmatite and magmatic intrusion...pre-Karoo age. The genetic model for emerald-bearing pegmatite (Maria III and Niane) involves the intrusion of...with quartz, feldspar, and topaz occur in small pegmatite pockets (up to 8 cm in size) at the contact granite-country |  | | Report (issue) | | ............................................M24 Mine Waste Characteristics ........................................................................M27 Mine Closure ..........................................regional lithium-cesium-tantalum rare-metalbearing pegmatite zoning above a parental granite.................zoned lithium-cesium-tantalum rare-metal-bearing pegmatite..............................................................M21 M13. Bar charts showing global mine production of niobium and tantalum, from 2000 to |  | | Journal (article/letter/editorial) | | de l'Ethiopie. Le complexe inf~rieur, form6 de gneiss de degr6 de m~tamorphisme 61ev6, repr6sente le...Geological Surveys, P.O. Box 5580, Addis Ababa, Ethiopia. Band.67, Heft 2, 1978, SeRe 531--546 531 Aufs~itze...or 8 years, mostly b y the Geological Survey of Ethiopia. Important contributions to the basement geology...Omo River Project (1973, 1976). The position of Ethiopia is u n i q u e in that within its territory the...(the Boye Series), and possibly occurs in western Ethiopia. In Sidamo and Hararge it is represented by psammitic |  | | Journal (article/letter/editorial) | | Rocks of the Neoproterozoic Adola Belt of Southern Ethiopia Bisrat Yibas Geology department, University of...quartz arenites) fall in the Passive Margin (I'M) field. The trace element characteristics of these rocks...oceanic tlioleiites and even boninites in the source region. The REE patterns show three distinct groupings;...1).It forms part of the Precambrian of southern Ethiopia where the Arabian-Nubain shield and the Mozambique...These, from west to east, are the Megado and the Kenticha sub-belts. The Megado sub-belt consists of tholeiitic |  | | Journal (article/letter/editorial) | | Orogeny: Evidence from the Bulbul Shear Zone, south Ethiopia Mohamed G. Abdelsalam a,⁎, Lulu Tsige b , Tadesse...Regional Mapping, Geological Survey of Ethiopia, Addis Ababa, Ethiopia Received 20 August 2007; received in...Neoproterozoic–Early Paleozoic Bulbul Shear Zone in southern Ethiopia is marked by sheared ophiolites at the interface...rights reserved. Keywords: Precambrian; Southern Ethiopia; Bulbul Shear Zone; Terrane rotation; East African...African Orogen 1. Introduction Southern Ethiopia is underlain by Neoproterozoic–Early Paleozoic rocks |  | | Book | | crystals on large, well-formed grey graphite crystals, field of view 3 cm - Philip Hitge specimen, Bruce Cairncross...runs from Madagascar through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa,...countries are among the finest in the world. The region and its gems are particularly dear to my family...most renowned gemstones from East Africa, this region is also host to some of the world's finest examples...several other varieties of gemstone occur in the region and, while perhaps not as popular, these too have |  | | Journal (article/letter/editorial) | | tantalum deposit, metallogeny of rare metals, pegmatite, granite magmatism, alkaline magmatism, tantaloniobates...tantalite-columbite, microlite, and ixiolite in the Ancient Gneiss Complex of Swaziland (Trumbull, 1993) and in the...(22) Motzfeldt; (23) Tanbreez; (24) Crevie; (25) Kenticha; (26) Three Alloes; (27) Tastyg; (28) Morrua;...Kamativi Manono-Kitotolo Motzfeldt Tanbreez Crevie Kenticha Three Alloes Tastyg Morrua Marropino Nanping Alberta...4data obtained from the analog located in the same region rather than from the object itself are italicized; |  | | Journal (article/letter/editorial) | | PEGMATITE Erste Österreichische Arbeitstagung Montanuniversität Leoben 11. April 2014 Zusammenfassung...Melcher MITT.ÖSTERR.MINER.GES. 160 (2014) PEGMATITE - ERSTE ÖSTERREICHISCHE ARBEITSTAGUNG von Johann...Montanuniversität Leoben die 1. Arbeitstagung zum Thema Pegmatite statt. Die Veranstaltung wurde vom Department...Geologie und Lagerstättenlehre) organisiert. Pegmatite sind sowohl aus wirtschaftlichen als auch wissenschaftlichen...hochgradiger Metamorphose gegenüber. Gerade die Pegmatite in den Ostalpen stellen ein Musterbeispiel für |  | | Journal (article/letter/editorial) | | gold mineralization in the Okote area, southern Ethiopia DEBELE J. D EKSISSA1,2 and C HRISTIAN KOEBERL2*...KOEBERL2* 1 2 P.O. Box 28503, Addis Ababa, Ethiopia Department of Geological Sciences, University of Vienna...mineralization of the Okote area is located in southern Ethiopia. Three NS striking ductile shear zones, with different...Keywords: gold mineralization, fluid inclusion, Ethiopia, tourmaline, rare earth element deposit and ubiquitous...known to date from the Adola Belt of southern Ethiopia. These gold mineralizations occur in intensely |  | | Journal (issue) | | Sabbagh Gemology Gem Quality Emeralds from Southern Ethiopia Members Jean Claude Michelou Stephan Reif Gary...promotion of the colored gemstone sector in that region as well as strengthening the activities in Asia...on the gamut of colored gemstones, literally from mine-to-market, with detailed articles on the world’s...sector. It will also continue to provide its esteemed mine-to-market coverage, while expanding its audience...plastic trays to dozens of miners in the Tanga region of Tanzania in January 2017. (Photo: Robert Weldon |  | “Beraki, W. H., Bonavia, F. F., Getachew, T., Schmerold, R., Tarekegn, T. (1989) The Adola Fold and Thrust Belt, southern Ethiopia: a re-examination with implications for Pan-African evolution. Geological Magazine, 126 (6) 647-657 doi:10.1017/s0016756800006944 | Journal (article/letter/editorial) | | 647 The Adola Fold and Thrust Belt, southern Ethiopia: a re-examination with implications for Pan-African...Project, UNDP ETH 86/034, P.O.Box 5580, Addis Ababa, Ethiopia t Cooperazione Italiana Universitaria, c/o Department...Geology, Addis Ababa University, Addis Ababa, Ethiopia (Received 10 October 1988; accepted 7 February...1989) Abstract - The Adola Fold and Thrust Belt of Ethiopia is a late- Precambrian, north-south trending belt...(F3), which imparted the dominant structure of the region; (4) F3 was later gently affected, at right angles |  | | Journal (article/letter/editorial) | | Geodynamic Evolution of the Neoproterozoic of Southern Ethiopia B. Yibasl, W.U. Reimold’ and C.R. Anhaeusser1f2...recognised in the Precambrian of southern Ethiopia: (1) granite-gneiss terrane, which is classified into sub-terranes...(2) ophiolitic fold and thrust belts. The granite-gneiss terrane consists of para- and ortho-quartzofeldspathic...this period is comparatively small in southern Ethiopia, implying that the ‘Mozambique Belt basin’ became...granitoid gneisses form an integral part of the granite-gneiss terrane, but are rare in the ophiolitic fold and |  | | Journal (article/letter/editorial) | | (1976) suggested late Proterozoic ages based on the field relations, whereas El Gaby et PT E al. (1988,...the adjacent metasediments for a few meters. Pegmatite pockets, partially greisenized, occur locally...red granites fall wholly within alkali granite field on the R1-R2 discrimination diagram (Fig. 4c). ...plot within the field SC of A1-type granites while the red granites fall within the field of A2-type granites...exprimental systems suggest that CE the high field strength elements (HFSE) display resistance to alteration |
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