 | 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) | | 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 |  | 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 |  | | Report (issue) | | brucite of yore from the Tilly Foster mine in New York or Wood’s Chrome mine in Pennsylvania. In that the new...suggests material found in 2005 in the N’Chwaning III mine in South Africa, but N’Chwaning brucite is graywhite...fine cerussite specimens from the old Monteponi mine, Sardinia, Italy, which Tomek Praszkier of Spirifer...finds in the 1980s in an old, presumably unnamed mine on the property of the Piquín farmhouse in Córdoba...little things from the Jeffrey mine, Asbestos, Quebec: the enormous asbestos mine closed for good at the outset |  | | 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) | | 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 |  | | 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 |  | 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) | | during progressive evolution of the melt in a pegmatite body (either Nb ? Ta or Fe ? Mn fractionation...mineral-melt partitioning during crystallization of the pegmatite body and by secondary hydrothermal or weathering...causing addition, loss or redistribution of REE. Pegmatite bodies may contain up to several generations of...provide constraints on the genesis of rare-element pegmatite systems. Furthermore, it may be used as a valuable...LCT pegmatite locations of central and southern Africa. These include: (1) the Homestead pegmatite, Tantalite |  | 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 |  | | 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 |  | | Report (issue) | | ....................................... 2 World Mine Production .......................................tsunami caused widespread 1 devastation across the region, as tens of thousands of people were killed, hundreds...Information Services Ltd., 2012). World Mine Production In 2011, world mine production of tantalum increased...in 2010. Rwanda accounted for 27 percent of total mine production in 2011; Brazil accounted for 20 percent;...Republic of the Congo [Congo (Kinshasa)], 15 percent; Ethiopia, 14 percent; China, 11 percent; Mozambique, 6 |  | Yan, Qing-He, Qiu, Zeng-Wang, Wang, He, Wang, Min, Wei, Xiao-Peng, Li, Pei, Zhang, Rong-Qing, Li, Cong-Ying, Liu, Jian-ping (2018) Age of the Dahongliutan rare metal pegmatite deposit, West Kunlun, Xinjiang (NW China): Constraints from LA–ICP–MS U–Pb dating of columbite-(Fe) and cassiterite. Ore Geology Reviews, 100. 561-573 doi:10.1016/j.oregeorev.2016.11.010 | Journal (article/letter/editorial) | | com/locate/oregeo Age of the Dahongliutan rare metal pegmatite deposit, West Kunlun, Xinjiang (NW China): Constraints...online xxxx Keywords: Dahongliutan rare metal pegmatite deposit Kunlun orogenic belt Columbite-(Fe) and...Dahongliutan is a medium-size Li–Be–Ta–Nb rare metal pegmatite deposit in the Tianshuihai terrane, West Kunlun...represents the emplacement age of the pegmatite dikes. The ore-hosting pegmatite dikes are intimately time-space...reserves in China, implying that the Dahongliutan pegmatite deposit may also have favorable oreforming conditions |  | | Journal (article/letter/editorial) | | % from tin slag refining and 10 % from secondary mine concentrates. Due to rapid industrialisation and...Canada account for about 92 and 7 % of Nb world mine production, respectively. Since the bulk of the...maintenance. Ta production at the massive Greenbushes pegmatite (Australia) has stopped, though Li production...start-up time for new operations. The Kenticha mine (Ethiopia) is a past producer that may re-enter production...studies on new developments) are required in any mine as price levels vary for each deposit and are dependent |  | | 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) | | be seen as a highly leucocratic medium-grained albite/oligoclase framework infilled with quartz, K-feldspar...K-feldspar megacrysts at the expense of the whitened albite framework imparts variably red colour to the Mueilha...and muscovite megacrysts at the expense of the albite/oligoclase crystals as a result of infiltration... D 1. Introduction PT E Rare-metals-bearing albite granites are meta- to peraluminous leucocratic...mineralization (e.g. co-occurrence of topaz, Li–Fe mica and albite, high F, Li, CE Rb, Ga, Sn and Nb contents; and |  | | Journal (article/letter/editorial) | | tantalum deposit, metallogeny of rare metals, pegmatite, granite magmatism, alkaline magmatism, tantaloniobates...pegmatitic-type deposits. Their oldest occurrences are albite and albite-spodumene rare-metal pegmatites with tantalite-columbite...(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 (issue) | | Decade of Change A New Era for the Historic Coscuez Mine Esmeraldas Santa Rosa: Our Wealth is Green Rediscovery...More Exquisite Emeralds Magnificent Old Mine Emeralds 143 Mine Visit A Visit to Colombia’s “Green” Emerald...acquiring the majority stake in the iconic Coscuez mine in Colombia. The 2015 Symposium focused on the government’s...have also seen new discoveries of emeralds in Ethiopia and increased awareness of the green gem from...confidence in gem purchases now starts at the mine in the broader mine-to-market concept. Another major change |  | | 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 |  | Wise, Michael A., Harmon, Russell S., Curry, Adam, Jennings, Morgan, Grimac, Zach, Khashchevskaya, Daria (2022) Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA. Minerals, 12 (1) 77 doi:10.3390/min12010077 | Journal (article/letter/editorial) | | minerals, rocks, soils, and brines in-situ in the field. In addition to being used in many products essential...Li-enriched pegmatites containing spodumene, K-feldspar, albite, quartz, muscovite, and beryl. We illustrate how...real-time Li analysis in the field at a historically important CTSB pegmatite locality in Gaston County...muscovite and rapidly determine the degree of pegmatite fractionation. This study demonstrates the potential...compositional information for pegmatites during a Li pegmatite exploration program. Academic Editor: Paul Alexandre |  | | Journal (article/letter/editorial) | | geology of the Lega Dembi gold deposit, southern Ethiopia: implications for Pan-African gold exploration...Dembi deposit is the largest gold producer in Ethiopia. It is situated in late-Precambrian metamorphosed...lateProterozoic Adola granite-greenstone terrane in southern Ethiopia. The lode-gold mineralization occurs in a N-S...belts. The Lega Dembi gold mine in the Sidamo region of southern Ethiopia is the largest gold producer...lithostratigraphic and structural evolution of the region have been proposed. However, because of the relatively |  | Abdel Gawad, Ahmed E., Ene, Antoaneta, Skublov, Sergey G., Gavrilchik, Alexandra K., Ali, Mohamed A., Ghoneim, Mohamed M., Nastavkin, Aleksey V. (2022) Trace Element Geochemistry and Genesis of Beryl from Wadi Nugrus, South Eastern Desert, Egypt. Minerals, 12 (2) 206 doi:10.3390/min12020206 | Journal (article/letter/editorial) | | East southward through Egypt, Sudan, Eritrea, Ethiopia, Somalia, Saudi Arabia, Yemen, Oman and Jordan...granites, Ta > Nb+Sn+Be±W-enriched, such as Li-rich albite granite (e.g., Nuweibi and Abu Dabbab areas), and...dark grey colors and NW– processes resulted in huge mine dumps containing significant amounts of beryl. SE...(Na, (main protocol) in diameter, limited by a field aperture. 2− ions were energy-filtered using anCr...25 μm (main protocol) in diameter, limited by a field aperture. Molecular «volatiles») of eachusing element |  | Zerboni, Andrea, Vignola, Pietro, Gatto, Maria Carmela, Risplendente, Andrea, Mori, Lucia (2017) Searching For the Garamantian Emerald: Reconsidering the Green-Colored Stone Beads Trade In the Ancient Sahara. The Canadian Mineralogist, 55 (4) 651-668 doi:10.3749/canmin.1600052 | Journal (article/letter/editorial) | | identify the only source of amazonite to be the pegmatite swarm at Eghei Zuma (northern Tibesti, Libya)...of the amazonite from Fewet could not be the pegmatite at Eghei Zuma. The raw material for amazonite...text. The position of Eghei Zuma in the Dohone region (northern fringe of the Tibesti batholith) is also...Garamantian culture expanded within the Libyan region of Fezzan to form a proper kingdom. At that time...position of the Eghei Zuma amazonite-bearing pegmatite (black star) are also shown. (B) The distribution |  | | 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 |  | | 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) | | “critical materials” or “strategic resources.” Field relationships, mineral chemistry, and experimental...aerospace, automotive, incompatible elements (high-field-strength and large-ion and electronic devices. lithophile...resource et al. 2012 this issue). This type of pegmatite contains base”: South America has reserves of...Southeast Asia and B). For example ores in the Tanco pegmatite (Manitoba, (10%), Russia and the Middle East (10%)...bulk are the Mibra operation in Brazil, Kenticha in Ethiopia, continental crust, which contains 16 ppm |
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