 | 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) | | (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 |  | 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 |  | | Report (issue) | | crisp despite partial dehydration) from the Margabal mine, Entraygues, Aveyron Department, France. 1 ==...======= Torbernite, 5.3 cm, from the Margabal mine, Entraygues, Aveyron, France. Trinity Minerals specimen...specimen and photo. This small uranium mine, in a small deposit discovered during a survey by the French...locality began in June 1997 when, somewhere in the old mine, about 1,000 fine specimens were recovered, with...$250. Vanadinite, 2.3 cm, from the North Geronimo mine, La Paz County, Arizona. Key’s Minerals specimen |  | 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 |  | | 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 |  | 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...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...distribution and face multiple production challenges. Pegmatite deposits (26%) will, therefore, remain an important |  | | 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 |  | | 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 |  | | Report (issue) | | FRONTISPIECE: Historic pump at the Wodgina tantalum–tin mine. Brought from Port Hedland by camel train about...manganotantalite crystals from Moolyella, Pilbara region. Simpson Collection, Western Australian Museum.................................. 17 Spodumene, petalite, and amblygonite subtypes ........................................... 24 Regional rare-metal pegmatite zoning and lithogeochemical anomalies ................................................... 25 Pegmatite dimensions and structure .................... |  | Bhandari, Sushmita, Qin, Kezhang, Zhou, Qifeng, Evans, Noreen J. (2022) Geological, Mineralogical and Geochemical Study of the Aquamarine-Bearing Yamrang Pegmatite, Eastern Nepal with Implications for Exploration Targeting. Minerals, 12 (5) 564 doi:10.3390/min12050564 | Journal (article/letter/editorial) | | Geochemical Study of the Aquamarine-Bearing Yamrang Pegmatite, Eastern Nepal with Implications for Exploration...Geochemical Study of the Aquamarine-Bearing Yamrang Pegmatite, Eastern Nepal with Implications for Exploration...iggcas.ac.cn Abstract: The Yamrang Pegmatite in the Ikhabu Pegmatite Field, Eastern Nepal is Nepal’s primary...detailed mineralogy and whole rock granite and pegmatite geochemistry, and major and trace element data...order to classify the aquamarine-bearing Yamrang Pegmatite, elucidate beryl-saturation processes and evaluate |  | | 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...Swedish chemist Johan Arfvedson analyzed the mineral petalite. Useful amounts of lithium metal were first isolated |  | 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 U–Pb isotopes on associated minerals in the pegmatite; this represents half of the Li minerals occurring...not only LCT granitic pegmatites (e.g., Tip Top mine, South Dakota, USA), but also the Ivigtut cryolite...of discovery of lithium minerals Spodumene and petalite were first reported in 1800, the first Li minerals...described. Subsequently, lithium was discovered in petalite (Arfwedson, 1818; Berzelius, 1818). Only 19 more...S1–S3 are: Tanco mine, Manitoba, Canada (Selway et al., 2000; Černý, 2005); Tip Top mine, South Dakota, |  | Gonçalves, , Melgarejo, , Alfonso, , Amores, , Paniagua, , Neto, , Morais, , Camprubí, (2019) The Distribution of Rare Metals in the LCT Pegmatites from the Giraúl Field, Angola. Minerals, 9 (10) 580 doi:10.3390/min9100580 | Journal (article/letter/editorial) | | Rare Metals in the LCT Pegmatites from the Giraúl Field, Angola Antonio Olimpio Gonçalves 1 , Joan-Carles...Abstract: The Giraúl 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 |  | Dittrich, Thomas, Seifert, Thomas, Schulz, Bernhard, Hagemann, Steffen, Gerdes, Axel, Pfänder, Jörg (2019) Archean Rare-Metal Pegmatites in Zimbabwe and Western Australia - Geology and Metallogeny of Pollucite Mineralisations. Springer International Publishing. doi:10.1007/978-3-030-10943-1 | Book | | and mineable quantities only from the two LCT pegmatite deposits at Bikita in the Zimbabwe Craton and...occurs in monomineralic mineralisation. Both pegmatite deposits have a comparable regional geological...Neo-Archean ages at *2625 Ma. A closure of the Tanco Mine for safety reasons and an imminent depletion of...July 2011 and June 2016, where a total of 19 pegmatite districts were inspected and sampled. The second...their formation, the v vi Preface Bikita pegmatite was included in the study. This book presents |  | Sánchez-Muñoz, Luis, Müller, Axel, Andrés, Sol López, Martin, Robert F., Modreski, Peter J., de Moura, Odulio J.M. (2017) The P–Fe diagram for K-feldspars: A preliminary approach in the discrimination of pegmatites. Lithos, 272. 116-127 doi:10.1016/j.lithos.2016.10.030 | Journal (article/letter/editorial) | | collisional orogens, such as in the Eastern Brazilian Pegmatite Province as the result of the collision of cratons...significant departures from the bulk composition of the pegmatite-forming magma. Yet there is a pressing need to...representative alkali feldspar from 31 carefully evaluated pegmatite localities covering a wide range of mineralogy...MANUSCRIPT geologist mapping uncharted territory in a pegmatite district. Our aim in this research is to test...be used as a measurable criterion for RI PT pegmatite discrimination, and to suggest elements that are |  | | Journal (article/letter/editorial) | | 6. Pan-African and younger isolated LCT-type pegmatite and W and Sn occurrences . 4. Discussion . . ...et al. (2014a). Field for average Upper Crust (UC) is from Rudnick and Gao (2003). Field for average shale...whereas for areas with major tin deposits or pegmatite swarms not all occurrences are shown to avoid...Pleasant, Burnthill, True Hill). c. 395 Ma LCT-type pegmatite (Brazil Lake), hosted in metasedimentary and metavolcanic...collisional stage of Sn (Li) mainly in granite–aplite–pegmatite the Variscan orogen; migmatisation and crustal |  | | 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 |  | | Book | | 40Ar/39Ar Age of the Gem-Bearing Boqueirão 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 Boqueirão granitic pegmatite situated in the Borborema Pegmatitic Province...granitic pegmatite is classified as a member of the Lithium-Caesium-Tantalum (LCT) pegmatite family and |  | | Report (issue) | | .B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agency’s...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................. |  | | Report (issue) | | trillion in 2014. The estimated value of U.S. metal mine production in 2014 was $31.5 billion (table 1),...Principal contributors to the total value of metal mine production in 2014 were copper (32%), gold (27%)...The estimated value of U.S. industrial minerals mine production in 2014 was $46.1 billion, about 7% more...than that of 2013. The value of industrial minerals mine production in 2013 was dominated by crushed stone... industrial minerals prices increased slightly. Mine production of 14 mineral commodities was worth more |
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