 | Kosman, Charles W., Kopylova, Maya G., Stern, Richard A., Hagadorn, James W., Hurlbut, James F. (2016) Cretaceous mantle of the Congo craton: Evidence from mineral and fluid inclusions in Kasai alluvial diamonds. Lithos, 265. 42-56 doi:10.1016/j.lithos.2016.07.004 | Journal (article/letter/editorial) | | Cretaceous kimberlites of the Lucapa graben in Angola. Analysis of 40 inclusion-bearing diamonds provides...and eclogitic, containing Cr-poor pyrope and omphacite with 11–27% jadeite (6 diamonds, 18% of the suite)...We 5°S Be lt (K IB) Mbuji-Mayi K ib a Belt Angola Block 10°S Mesoproterozoic fold belts Neoproterozoic...Orogeny) Paleoproterozoic fold belts Poorly known province of Paleo-Mesoproterozoic crust reworked during...of discontinuous faults in southwest and central Angola (de Boorder, 1982). In addition to kimberlites |  | | Journal (article/letter/editorial) | | of Saint Petersburg, Russia c Catoca Geological-Mining Community, Angola Ac ce p te d M an us cr...age of upper mantle eclogite xenoliths from the Catoca and Cat-115 (Kasai Craton) pipes are presented...ratios. an The Nb/Ta and Nb/La ratios in the Catoca eclogites range from chondritic to superchondritic...and forming inclusions in diamonds. Because the Catoca kimberlite pipe is one of the richest diamond-bearing...on eclogite xenoliths from the Catoca and CAT-115 (Kasai Craton, Angola) kimberlite pipes, which are common |  | Korolev, N. M., Marin, Yu. B., Nikitina, L. P., Zinchenko, V. N., Chissupa, H. M. (2014) High-Nb rutile from upper mantle eclogite xenoliths of the diamond-bearing kimberlite pipe Catoca (Angola) Doklady Earth Sciences, 454 (1) 50-53 doi:10.1134/s1028334x14010103 | Journal (article/letter/editorial) | | Xenoliths of the DiamondBearing Kimberlite Pipe Catoca (Angola) N. M. Koroleva, Corresponding Member of the...1134/S1028334X14010103 The Luanda diamond province (northeastern Angola), including the Catoca kimberlite pipe, which is...Craton is more than 300 km [2, 3]. Kimberlite pipe Catoca is characterized by a spe cific set of mantle...garnet (Prp29–33Alm29–31Grs33–40) and highNa omphacite ((Wo+En+Fs)39–46Jd54–61). Secondary minerals are...(Prp35–48Alm33–45Grs16–28) and lowmagnesium omphacite (Wo+En+Fs)55–65Jd31–44Aeg0–6 (HMgO) contain pyrope |  | Ashchepkov, Igor, Logvinova, Alla, Spetsius, Zdislav, Downes, Hilary, Ntaflos, Theodoros, Ivanov, Alexandr, Zinchenko, Vladimir, Kostrovitsky, Sergey, Ovchinnikov, Yury (2022) Eclogite Varieties and Their Positions in the Cratonic Mantle Lithosphere beneath Siberian Craton and Archean Cratons Worldwide. Minerals, 12 (11) 1353 doi:10.3390/min12111353 | Journal (article/letter/editorial) | | Russia CATOCA Mining Society, Av. Talatona, N/N, Quarter GU-01, Luanda 10257-10398, Angola Correspondence:...part of the Dharwar craton in India [69,83,84], Angola [85–87], and several localities from South Africa...(A) 0 T oC Fe# Ol in equilibrium with Cpx, Gar Catoca cluster 1 2 1 2 Gr Hi-Mg GrA2 3 45 mw/m2...Dharwar craton; Catoca cluster kimberlites. Symbols the same as for Figure 3. (B) Catoca cluster kimberlites...Roberts Victor pipe, Kaapvaal Craton, Africa 5.4. Catoca pipe, Craton, Africa This Congo pipe, Kasai the |  | Ashchepkov, I.V., Vladykin, N.V., Ntaflos, T., Downes, H., Mitchell, R., Smelov, A.P., Alymova, N.V., Kostrovitsky, S.I., Rotman, A. Ya, Smarov, G.P., Makovchuk, I.V., Stegnitsky, Yu.B., Nigmatulina, E.N., Khmelnikova, O.S. (2013) Regularities and mechanism of formation of the mantle lithosphere structure beneath the Siberian Craton in comparison with other cratons. Gondwana Research, 23 (1) 4-24 doi:10.1016/j.gr.2012.03.009 | Journal (article/letter/editorial) | | pipes (Ashchepkov et al., 2012b) pipes and for Catoca pipe (Ashchepkov et al., in press). New diagrams...V—Hapchan; VI—Birekte; VII–XII—Aldan–Stanovoy province: VII—Olekma, VIII—Central Aldan, IX—East Aldan...the melt feeders because the largest pipes like Catoca have much higher sub-calcic garnets (Ashchepkov...studied pipes. The Mesozoic mantle geotherms from NE Angola (Fig. 13A), Congo (Batumike et al., 2009) (Fig...al. / Gondwana Research 23 (2013) 4–24 A 0 0 Catoca 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 |  | | Journal (issue) | | lower-quality diamonds from Australia’s Argyle mine, coupled with the exponential expansion of India’s...Beers by securing lucrative diamond sources in Angola, Namibia, and Russia. De Beers recast its own operations...Congo [DRC] after 1996) Minière de Bakwanga (MIBA) mine and Angola’s state-owned diamond-mining company...the open market. With one exception (the Argyle mine), all major diamond production sources were controlled...producers (effectively forcing them to stock at the mine sites). Yet several forces were developing that |  | | Journal (article/letter/editorial) | | central part of the Arkhangelsk diamondiferous 16 province (ADP). Based on the concentrations of Cr2O3, CaO...mantle beneath the Arkhangelsk diamondiferous province (ADP) is one 71 of the most poorly characterized...finding of garnets with majorite component and omphacite with high K2O contents (up to 0.8 79 wt.%) among...setting and samples The Arkhangelsk diamondiferous province (ADP) is located in the northern part of the ...beneath kimberlite pipes from the 491 Catoca cluster, Angola. Tectonophysics 530–531, 128–151 492 |  | Ashchepkov, I.V., Kuligin, S.S., Vladykin, N.V., Downes, H., Vavilov, M.A., Nigmatulina, E.N., Babushkina, S.A., Tychkov, N.S., Khmelnikova, O.S. (2016) Comparison of mantle lithosphere beneath early Triassic kimberlite fields in Siberian craton reconstructed from deep-seated xenocrysts. Geoscience Frontiers, 7 (4) 639-662 doi:10.1016/j.gsf.2015.06.004 | Journal (article/letter/editorial) | | in the central part of the Yakutian kimberlite province. This is supported by geophysical mantle profiles...VeKhapchan, VIeBirekte, VIIeXII: AldaneStanovoy province; VIIeOlekma, VIIIeCentral Aldan, IXeEast Aldan...concentrate, as it was determined for kimberlites from Angola (Ashchepkov et al., 2012). The concentrate from...Pyroxenes (Cr-diopsides, pyroxenitic augites and rare omphacite) in association with ilmenites are more highly...(Nelson et al., 1988). The melt parental for the omphacite reveals signatures of primitive Mg-andesites with |  | | Journal (issue) | | Afghan beryls from pegmatites at Ghursalak in Konar Province (aquamarine, morganite) and from the Panjshir...the Nilaw, Mawi and Kurghal regions of Laghman Province from cavities in pegmatite veins (Figure 1). ...Beryl samples from pegmatites of Ghursalak (Konar Province) and Panjshir Valley in NE Afghanistan were provided...of emerald occur in the Panjshir Valley (Kapisa Province). The Nilaw-Kolum Pegmatite Field (35°12' N and...Ghursalak (Gursalak) Pegmatite Field in Konar Province (about 34°57' N and 70°43' to 70°44' E) has yielded |  | | Journal (issue) | | from India • Emerald mining techniques at the Kagem mine, Zambia • Yellow grossular from Tanzania • An unusual...studies of retail colored stone demand, to provide a mine-to-market analysis of corundum over the last quarter...or difficult to interpret, even when coming from mine owners or official government sources. For example...Pakistani side of Kashmir (Kane, 1997, 1998). The mine, situated in extremely remote and rugged mountainous...g (85 ct; Kane, 1997, 1998). It is believed the mine was still operat- GEMS & GEMOLOGY WINTER 2009 |  | Faithfull, John W., , , Dempster, Tim J., MacDonald, John M., Reilly, Monica (2018) Metasomatism and the crystallization of zircon megacrysts in Archaean peridotites from the Lewisian complex, NW Scotland. Contributions to Mineralogy and Petrology, 173 (12) doi:10.1007/s00410-018-1527-5 | Journal (article/letter/editorial) | | preceded by eclogite-facies metamorphism, with omphacite-bearing assemblages surviving in garnetrich clots...Scourie dyke swarm: A long-lived large igneous province with implications for the Paleoproterozoic evolution...anthophyllite—magnesite assemblages from the Grenville province. Canad Mineral 35:122 l-1236 Friend CRL, Kinny...SHRIMP geochronology of zircon from the Catoca kimberlites, Angola: implications for diamond exploration |  | | Book | | of the eastern margin of the Atlantic (Namibia, Angola) or the western African kimberlites do not fulfil...individual chapters: i) the carbonatitic-alkaline province outcropping on the Kenya-Uganda border which have...Petrogenesis of the volcanic rocks of the Karoo Province edited by ERLANK (1984). In addition, a review...review paper related to this volcanic province appeared in the book devoted to the Flood Basalts Provinces...138 139 142 146 146 5 The Mesozoic Tholeiitic Province of Northwest Africa: A Volcanotectonic Record |  | | Journal (issue) | | Tajikistan • “Jambolite” • Update on the John Saul ruby mine, Kenya • Ruby and other gems from Nanyaseik, Myanmar...(for Fe), olivine (for Mg), rhodonite (for Mn), omphacite (for Na), ilmenite (for Ti), K-feldspar (for K)...DeGhionno D.G., Koivula J.I. (1996) Opal from Shewa Province, Ethiopia. Gems & Gemology, Vol. 32, No. 2, pp...Muzo region, which encompasses not only the Muzo mine but also the La Pita, Figure 1. In the six upper...There is also confusion relating to “old mine” emeralds. Old mine is another term applied to rare and fine |  | | Book | | discovered kimberlites of the Siberian kimberlite province. 9 K - rich clinopyroxenes as mantle conveyers...and kamafugites from the Alto Paranaiba Igneous Province, Minas Gerais, Brazil: Preliminary studies. 26...diamond. 61 Cr-poor Megacrysts from the Frank Smith Mine and the source regions of transitional kimberlites...Facies Kimberlite Bodies of the Fort £ la Come Province, Saskatchewan, Canada. 103 Kimberlites, accelerated...Mantle Formation The Buffalo Hills Kimberlite Province, North-central Alberta, Canada. Eclogitic, Peridotitic |  | | Journal (volume) | | .........................319 EM61 Mineralogy of mine wastes and contaminated soil......................and phases composition of flotation waste of Bor mine (Serbia) Cocić, M.1, Matović, B.2 & Logar, M.3*...pezzottaite from Myanmar Emeralds from the Piteiras mine, Minas Gerais State, Brazil: genetic implications...Nancy I, Vandoeuvre-le`sNancy, France The Piteiras mine in Itabira is located in the Minas Gerais State...Temperature (oC) Koffiefontein mine 1087 (±15) 5.2 (±0.1) Finsch mine 1041 (±5) 5.0 (±0.1) The structural |  | | Journal (issue) | | formation. 223 Blue Sapphires from the Baw Mar Mine in Mogok Hpone-Phyo Kan-Nyunt, Stefanos Karampelas...bring our readers more of these “direct from the mine” articles, particularly from GIA’s dedicated field...Bangui; (21) Mbuji-Mayi; (22) Camafuca, Cuango, Catoca; (23) Masvingo; (24) Mwadui; (25) Luderitz, Oranjemund...macrodiamonds in the Wawa belt of the Superior geologic province of Canada (Stachel et al., 2006). In both cases...Argyle mine (Shigley et al., 2001), and its smaller and younger cousin, the nearby Ellendale mine, specimens |  | | Journal (issue) | | Shown here is the recovery plant at the Jwaneng mine in Botswana. Photo courtesy of Debswana. another...for a total value of about US$3.5 billion. The province of Saskatchewan will likely be an important player...2020 Yasukazu Suwa I t took about 2,700 years to mine and fashion an estimated 0.8 tons of diamonds before...products have not been sullied at any step from mine to retail. Consumers want to know that their purchase...(see inside front cover of this issue). The Pala mine owners, as well as Pala International/The Collector |  | | Journal (issue) | | INSTITUTE OF AMERICA Russia's Lomonosov Diamond Mine Carbonado Diamond PL Mapping of Optical Defects...article of this issue examines Russia’s Lomonosov mine, which is located in a Proterozoic zone in the Baltic... 2 EDITORIAL 143 Visit Europe’s First Diamond Mine Duncan Pay FEATURE ARTICLES 144 Geology and Development...well as the geology of the Arkhangelsk kimberlite province. 168 Carbonado Diamond: A Review of Properties...zirconia • Errata Visit Europe’s First Diamond Mine If variety is the spice of life, you’ll appreciate |  | | Book | | chamber once existed beneath the Tharsis volcanic province. Some petrologists be- (1979: partly lieve that...Elysium volcanic province, centred at 25°N and 210 °W. The Tharsis is the largest province and comprises...volcanic landforms. The volcanoes of the Elysium province are also situated on a huge dome, 2000 km across...generally occur in either the Tharsis volcanic province, BVSP formed (1981: as the of large volumes...within the ancient cratered terrain. In the Tharsis province, three huge shield volcanoes, known as Ascreus |  | | Book (volume) | | Kimberlite Magmatism in the Yakutian Kimberlite Province: Constraints from Isotope Geochronology—An Overview...5 Pseudomorphic serpophite 15 -0.5 Wesselton Mine (South Africa) Segregation serpophite 6 -1.3...-0.1 Segregation serpophite 17 0.1 Wesselton Mine (South Africa) Segregation serpophite 18 -0.5...(2009) Tuffisitic kimberlites from the Wesselton Mine, South Africa: Mineralogical characteristics relevant...petrogenesis of the Wesselton Mine kimberlite, Kimberley, Cape Province, R.S.A. Ph.D. Thesis, University |  | | Report (volume) | | ophiolite-hosted Code Locality Canada C1 Jeffrey Mine, Quebec Carbides* 15 Type** Associated Phases***...R1 Khungtukun Massif, Khatanga, Siberia R2 Coal Mine 45, Kopeisk, Urals R3 Is River, Isovsky District...Pb, Sn, Zn Dia Jed, Ru South Africa S1 Monastery Mine, Free State Prov. M Kim Dia, Maj Tajikistan...N-Cu-PGE Deposit, Sichuan Province; and (4) at Liu Village, Henan Province. These deposits incorporate...α = 46.1°; Z = 2). Calcite crystal from Elmwood Mine, Carthage, Tennessee. Photo courtesy of Rob Lavinsky |
|
