 | | 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 Ăsterreichischen Mineralogischen Gesellschaft, 147. | Journal (article/letter/editorial) | | MAIN RIFT AND BASEMENT ROCKS OF THE ADOLA REA, ETHIOPIA by A. Mogessie, K. Krenn, J. SchaïŹechner, U...Addis Ababa University, Ethiopia 2Ethiopian Institute of Geological Surveys Ethiopia 43 44 1. GENERAL...INTRODUCTION The ïŹeld 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...ïŹelds and iii) the Adola gold belt including the Kenticha tantalum-bearing pegmatites (Fig. 1). Nine earth |  | | 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 |  | 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...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...The metamafic horizons are overlapped by a major field of Be-bearing pegmatites and hydrothermal veins |  | Melcher, Frank, Graupner, Torsten, GĂ€bler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, OberthĂŒr, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalumâ(niobiumâtin) mineralisation in African pegmatites and rare metal granites: Constraints from TaâNb oxide mineralogy, geochemistry and UâPb 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 (issue) | | Age Dating of Zircon Inclusions in Sapphire Ethiopia Field Report 2019 Tucson Report Spring 2019 VOLUME...table facets. FIELD REPORTS 72 p. 135 Land of Origins: A Gemological Expedition to Ethiopia Wim Vertriest...opal, and emerald mining and trading areas of Ethiopia. REGULAR FEATURES 29 The Dr. Edward J. GĂŒbelin...in opal âą Trapiche-like ruby from the Batakundi mine in Kashmir âą Sapphire inclusion with rutile âsilkâ...Moonstone jewelry âą Oregon sunstone âą Potentate mine sapphire update âą âRainbow latticeâ feldspar âą Responsibly |  | | Journal (article/letter/editorial) | | PEGMATITE Erste Ăsterreichische Arbeitstagung MontanuniversitĂ€t Leoben 11. April 2014 Zusammenfassung...Melcher MITT.ĂSTERR.MINER.GES. 160 (2014) PEGMATITE - ERSTE ĂSTERREICHISCHE ARBEITSTAGUNG von Johann...MontanuniversitĂ€t Leoben die 1. Arbeitstagung zum Thema Pegmatite statt. Die Veranstaltung wurde vom Department...Geologie und LagerstĂ€ttenlehre) organisiert. Pegmatite sind sowohl aus wirtschaftlichen als auch wissenschaftlichen...hochgradiger Metamorphose gegenĂŒber. Gerade die Pegmatite in den Ostalpen stellen ein Musterbeispiel fĂŒr |  | Grew, Edward S., Hystad, Grete, Toapanta, Myriam P. C., Eleish, Ahmed, Ostroverkhova, Aleksandra, Golden, Joshua, Hazen, Robert M. (2019) Lithium mineral evolution and ecology: comparison with boron and beryllium. European Journal of Mineralogy, 31 (4) 755-774 doi:10.1127/ejm/2019/0031-2862 | Journal (article/letter/editorial) | | by UâPb isotopes on associated minerals in the pegmatite; this represents half of the Li minerals occurring...so far reported in the geologic record are ïŹuor-elbaite and polylithionite (as the dominant constituent...not only LCT granitic pegmatites (e.g., Tip Top mine, South Dakota, USA), but also the Ivigtut cryolite...S1âS3 are: Tanco mine, Manitoba, Canada (Selway et al., 2000; ÄernĂœ, 2005); Tip Top mine, South Dakota,...ofïŹcial approval of these end members, for example, elbaite is a conspicuous example with a discovery date |  | | Report (issue) | | ................. K5 Lithium-Cesium-Tantalum Pegmatite Deposits........................................ K14 Exploration for Lithium-Cesium-Tantalum Pegmatite Deposits................................................................................... K15 Mine Waste Characteristics.............................sedimentary basins and extracted from granitic pegmatite ores. The leading producer of lithium from brine...in 1898 at the Etta pegmatite in South Dakota. In the early 1900s, other pegmatite mines in California |  | Gonçalves, , Melgarejo, , Alfonso, , Amores, , Paniagua, , Neto, , Morais, , CamprubĂ, (2019) The Distribution of Rare Metals in the LCT Pegmatites from the GiraĂșl Field, Angola. Minerals, 9 (10) 580 doi:10.3390/min9100580 | Journal (article/letter/editorial) | | Rare Metals in the LCT Pegmatites from the GiraĂșl Field, Angola Antonio Olimpio Gonçalves 1 , Joan-Carles...Abstract: The GiraĂșl granitic pegmatite field in Angola is composed of five pegmatite types, the most evolved...pegmatites are rich in Nb-Ta oxide minerals and the field has a moderate interest for critical elements such...the evolution of the pegmatites and within each pegmatite body from border to inner zones, and especially...minerals is quite characteristic in granites and pegmatite rocks and gives us information about their petrogenesis |  | | Book | | 40Ar/39Ar Age of the Gem-Bearing BoqueiraÌo Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted...Gabriele Lanzafame Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy:...Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights...economically important gem-bearing BoqueirĂŁo granitic pegmatite situated in the Borborema Pegmatitic Province...granitic pegmatite is classiïŹed as a member of the Lithium-Caesium-Tantalum (LCT) pegmatite family and |  | | Journal (issue) | | the submission of articles on all aspects of the field. Please see the Author Guidelines at gia.edu/gemsgemology...published in G&G are also welcome. Please note that Field Reports, Lab Notes, Gem News International, Micro-World...tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite. 42 The Role of Silicon...Robert Weldon survey Brazilâs diamond deposits. This region has produced a significant number of large rough...copper-bearing tourmaline on the market today is elbaite, but some is undoubtedly another tourmaline species: |  | | Journal (issue) | | alexandrite from several countries. p. 663 FIELD REPORTS 490 Field Gemology: Building a Research Collection... Palke, and Nathan D. Renfro With more than 90 field expeditions on six continents since 2008, GIA has...the submission of articles on all aspects of the field. Please see the Author Guidelines at gia.edu/gemsgemology...published in G&G are also welcome. Please note that Field Reports, Lab Notes, Gem News International, Micro-World...Caplan. The back cover shows emeralds from the Chivor mine in Colombia (3.90 ct faceted stone and 2.35 cm crystal) |  | | Report (issue) | | FRONTISPIECE: Historic pump at the Wodgina tantalumâtin mine. Brought from Port Hedland by camel train about...manganotantalite crystals from Moolyella, Pilbara region. Simpson Collection, Western Australian Museum........................ 24 Regional rare-metal pegmatite zoning and lithogeochemical anomalies ................................................... 25 Pegmatite dimensions and structure .............................. 63 Bernic Lake tantalumâlithiumâcaesium mine ............................................... |  | | Journal (issue) | | M. Gressm an tgressman@comcast.n et The Musonoi mine, Kolwezi District, Lualaba Province, Democratic...COVER: METATORBERNITE, 6.6 cm, from the Musonoi mine, Kolwezi District, Democratic Republic of the Congo...April, 201 8 Prese!tt,a to Roderick Tyson For field collecting achievements contributing to the heritage...Rod Tyson has been one of the leading Canadian field collectors for decades, and has brought countless...March-April, 2018 Record, in recognition of his field-collecting achievements contributing to the Heritage |  | | Journal (issue) | | Scapolite from Brazil | Spessartine Reportedly from Ethiopia | Diamond Mining at Theindaw, Myanmar | Early...and Their Composition in Ruby from the Bo Rai Gem Field in Trat Province, Eastern Thailand By Supparat Promwongnan...in the 450â500 nm region that is bounded by absorption bands in the visible region that arise from the...Be-, F- and Na-bearing fluids from an unexposed pegmatite dyke or hydrothermal vein, with later overprinting...green regions with an edge in the yellow-green region caused by a prominent band at ~535 nm. Also present |  | | Journal (issue) | | west of Sakoany village in the Mahajanga (Majunga) region on the north-western coast of Madagascar, near...(605 nm) was somewhat shifted towards the blue region and it lacked Figure 1: This 4.22 ct celestine...inclusions in the ruby permitted the features in this region to be fully resolved. Corundum is anhydrous and...Because vesuvianite absorbs strongly in the mid-IR region of the spectrum, even minute inclusions can give...vesuvianite showed total absorption corresponded to the region of the compound band structure in the 2.19 ct ruby |  | | Report (issue) | | .B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agencyâs...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012............................F2 Graph showing world cobalt mine and refinery production and apparent consumption.....................F2 Graph showing world cobalt mine production from 1950 to 2011......................F4. Pie chart showing percentage of world cobalt mine production in 2011, by country................. |  | | Book | | . . . . . . . . . . . 323 324 324 326 327 Pegmatite . . . . . . . . . . . . . . . . . . . . . . ....Pegmatiten . . . . . . . . . . . . . . . . . . . Pegmatite als RohstofftrĂ€ger . . . . . . . . . . . . . .... . . Geochemische Klassifikation der Granit-Pegmatite . . . . . . . . . . . . . . . . . . . . . . ....bedeckt wird. Aus einer Planktonprobe der Kimberley-Region (Australien), von CSIRO Tasmania zur VerfĂŒgung...Hudson-Edwards KA, Jamieson HE, Lottermoser BG (2011) Mine wastes. Elements 7:375â380 Jones JR, Gentleman E |
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