 | Ustinov, Victor N., Feijo Bartolomeu, Ana M., Zagainy, Alexander K., Felix, Joao T., Mikoev, Igor I., Stegnitskiy, Yury B., Lobkova, Ludmila P., Kukui, Irina M., Nikolaeva, Evelina V., Antonov, Sergei A. (2018) Kimberlites distribution in Angola and prospective areas for new discoveries. Mineralogy and Petrology, 112. 383-396 doi:10.1007/s00710-018-0628-1 | Journal (article/letter/editorial) | | 1 ORIGINAL PAPER Kimberlites distribution in Angola and prospective areas for new discoveries Victor...a comprehensive analysis of kimberlite pipes of Angola, including the near surface structural setting...geographical regions have been outlined within Angola representing four types of diamond bearing potential...increases from the Atlantic coast in southwestern Angola into the continent in the north-easterly direction...identified. Keywords Kimberlite pipe . Ilmenite . Pyrope . Diamond . Deposit . Structure Introduction Approximately |  | Robles-Cruz, Sandra, Melgarejo, Joan, GalĆ, Salvador, Escayola, Monica (2012) Major- and Trace-Element Compositions of Indicator Minerals that Occur as Macro- and Megacrysts, and of Xenoliths, from Kimberlites in Northeastern Angola. Minerals, 2 (4) 318-337 doi:10.3390/min2040318 | Journal (article/letter/editorial) | | of Xenoliths, from Kimberlites in Northeastern Angola Sandra E. Robles-Cruz 1,*, Joan Carles Melgarejo...in the Lucapa area, northeastern Angola: Tchiuzo, Anomaly 116, Catoca, Alto Cuilo-4, Alto Cuilo-63 and...petrogenetic evolution of the kimberlites in northeastern Angola and have important implications for diamond exploration...exploration. Minerals 2012, 2 319 Keywords: Angola; kimberlite; olivine; garnet; clinopyroxene; diamond;...xenoliths; REE; Sm/Nd isotopes 1. Introduction In Angola, more than 700 occurrences of kimberlite are distributed |  | | 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 |  | 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...of the suite), and eclogitic, containing Cr-poor pyrope and omphacite with 11ā27% jadeite (6 diamonds,...We 5Ā°S Be lt (K IB) Mbuji-Mayi K ib a Belt Angola Block 10Ā°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 |  | 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...Lowmagnesium eclogites (LMgO) are composed of pyropealmandine garnet (Prp35ā48Alm33ā45Grs16ā28) and...omphacite (Wo+En+Fs)55ā65Jd31ā44Aeg0ā6 (HMgO) contain pyrope (Prp67ā75Alm17ā23Grs4ā10) and high Mg omphacite |  | | Journal (issue) | | ā¢ Green opal ā¢ Chinese akoya cultured pearls ā¢ Pyrope-almandine from Tanzania ā¢ Pink-to-red tourmaline...diamonds of cube and cuberelated shape from the Jwaneng mine,ā Journal of Crystal Growth, Vol. 94, 1989, pp....has been more recently reviewed in an article of mine (B. Rondeau et al., āDiamants cubiques et presque...1930s and the impact of World War II. The Premier mine closed in 1932, and the Kimberley mines were closed...decades. There was a jump in 1968 when the Finsch mine came into full operation, after which production |  | 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...VāHapchan; VIāBirekte; VIIāXIIāAldanāStanovoy province: VIIāOlekma, VIIIāCentral Aldan, IXāEast 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) 4ā24 A 0 0 Catoca 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 |  | 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:...eclogites; diamond inclusions; thermobarometry; pyrope; clinopyroxenes; trace elements; mantle lithosphere...part of the Dharwar craton in India [69,83,84], Angola [85ā87], and several localities from South Africa...Udachnaya (Figure 3A) is typical geotherm, marked by pyrope inclusions in diamonds. This group divides into...belong to the 3.0ā6.0 GPaofpressure interval by pyrope inclusions in diamonds. This group divides into |  | | Journal (article/letter/editorial) | | northeastern Angola, which hosts most of the kimberlites of the Congo Craton including Catoca, the world's...alluvial diamonds of the Kasai River, Katanga Province, Democratic Republic of the Congo (DRC), whose...of the cratonic mantle underpinning northeastern Angola. In the ļ¬fth paper of the category, Rudloff-Grund...(rutile + forsterite + enstatite + Cr-diopside + Cr-pyrope) preserved in diamond from the Mir pipe. The authors |  | | Journal (article/letter/editorial) | | of the Daldyn ļ¬eld in the Yakutian kimberlite province. The representativity of the ilmenites sampled...of the Daldyn ļ¬eld in the Yakutian kimberlite province. Mg-bearing ilmenite (Ilm) is one of the most...different pipes in various ļ¬elds of the Yakutian province. Academician N.V. Sobolev (1977, 1980 and 1984)...lithodemic units of kimberlite volcanism are: province, ļ¬eld, cluster, pipe, dyke and sill. These units...within the Daldyn ļ¬eld of Yakutian kimberlite province. This ļ¬eld is an ideal object of research, since |  | | Journal (issue) | | lower-quality diamonds from Australiaās Argyle mine, coupled with the exponential expansion of Indiaās...Beers by securing lucrative diamond sources in Angola, Namibia, and Russia. De Beers recast its own operations...Congo [DRC] after 1996) MiniĆØre de Bakwanga (MIBA) mine and Angolaās 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 |  | Starikova, Anastasiya, Prokopyev, Ilya, Doroshkevich, Anna, Ragozin, Alexey, Chervyakovsky, Vasily (2021) Polygenic Nature of Olivines from the Ultramafic Lamprophyres of the Terina Complex (Chadobets Upland, Siberian Platform) Based on Trace Element Composition, Crystalline, and Melt Inclusion Data. Minerals, 11 (4) 408 doi:10.3390/min11040408 | Journal (article/letter/editorial) | | plume activity forming the Siberian large igneous province (LIP), and the Chadobets UML-carbonatite complex...alkaline complex within the Siberian large igneous province (LIP) on the Siberian craton [37]. (b) Geological...against the standards of olivine Ch1 (Si, Mg, Fe), pyrope (Al), Mn-garnet (Mn), blue diopside (Ca), Co3 O4...ilmenites from the Koidu (Sierra Leone) [80] and Catoca, Angola kimberlites [81,82], as well as for ilmenites...their relation to the North Atlantic Alkaline Province. Lithos 2004, 76, 491ā518. [CrossRef] Le Roex |  | | Journal (article/letter/editorial) | | Korolev et al., 2014; Hirtopanu et al., 2015) and pyrope crytals (ā¼15.6 wt.%: Rezvukhin et al., 2016) in...right-lateral Sagaing fault (Fig. 1a). The Western province is composed of the Burma microplate and a part...region (e.g. Mitchell et al., 2007). The Eastern province belongs to the Sibumasu block of the Asian plate...belt lies along the western margin of the Eastern province. Yonemura et al. (2013), Maw Maw Win et al. (2016)...these samples. Garnet grains belong to an almandineāpyrope series with minor grossular and spessartine components |  | Ashchepkov, I. V., Alymova, N. V., Logvinova, A. M., Vladykin, N. V., Kuligin, S. S., Mityukhin, S. I., Downes, H., Stegnitsky, Yu. B., Prokopiev, S. A., Salikhov, R. F., Palessky, V. S., Khmel'nikova, O. S. (2014) Picroilmenites in Yakutian kimberlites: variations and genetic models. Solid Earth, 5 (2). 915-938 doi:10.5194/se-5-915-2014 | Journal (article/letter/editorial) | | compositions from different regions Yakutian kimberlite province (Daldyn, Alakit and Malo-Botuobinsky fields)....from different regions within Yakutian kimberlite province (Nakyn, Upper Muna and Anabar fields). 1. Ilmenites...the Mg-rich and Fe-rich varieties, for example in Angola (Robles-Cruz et al., 2009; Ashchepkov et al., 2012)...ilmenite-bearing association form kimberlites of Yakutian province, Ph.D. dissertation thesis, Irkutsk, Institute...mantle beneath kimberlite pipes from the Catoca cluster, Angola, Tectonophysics, 530ā531, 128ā151, 2012 |  | | 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...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 530ā531, 128ā151 492 ...Posuhova T.V., 1999. Arkhangelsk diamondiferous 500 province. Moscow State University, 521p (in Russian). |  | | Journal (issue) | | moving products from mine to consumer. The main cover image was taken at the AnahĆ mine in Bolivia, a major...instrumentation such as LA-ICPMSāonce primarily the province of academiaābecame a fixture in many gemological...of the company (Even-Zohar, 2007). Because of the mine closures, De Beersās market share by volume fell...pink diamonds (0.51 and 0.55 ct) from the Argyle mine in Australia were part of the 2007 Argyle pink diamonds...interest in Angolaās Catoca mine in the early 1990s. Commissioned in 1997, Catoca was producing just over |  | Bataleva, Y.V., Palyanov, Y.N., Sokol, A.G., Borzdov, Y.M., Palyanova, G.A. (2012) Conditions for the origin of oxidized carbonate-silicate melts: Implications for mantle metasomatism and diamond formation. Lithos, 128. 113-125 doi:10.1016/j.lithos.2011.10.010 | Journal (article/letter/editorial) | | carbonateāsilicate melt, coexisting with Fe3 +-bearing ilmenite, pyrope-almandine and rutile, contained up to 13 wt.% of...carbonateāsilicate melt was formed in association with pyrope-almandine and Fe3 +-bearing rutile. It was experimentally...completely under run conditions, would produce pyrope garnet and CO2 ļ¬uid via decarbonation (Pal'yanov...1550ā1650 Ā°C).D ā diamond seed crystals; Prp-Alm ā pyrope-almandine; OPx ā orthopyroxene; FeMs ā Fe-magnesite;...used for the analyses of melt phase were natural pyrope, enstatite, diopside, kyanite, rutile, ilmenite |  | | Journal (issue) | | this stone was cut was found at Guinea's Aredor mine In 1986. Courtesy of william Goldberg Diamond Corp;...(and, until his death, sale owner) of the Mwadui mine, Canadia n geologist Joh n Williamson has a unique....0 Year first diamond found" Country Algeria Angola Botswana Burkina Faso Cameroon Central African...and Zimbabwe. gCentral and East Africa includes: Angola, Central African Republic. Tanzania, andZaire....Mwadui are being overhauled to extend the life of the mine ("Ta nz ania: D e Beers group is to . . . ." 1995) |  | | Journal (issue) | | 1975). The observed rubies from Chanthaburi-Trat province revealed some fire marks (Figure 10), which were... XIX, 4 ON THE IDENTIFICATION OF A LIGHT PINK PYROPE GARNET AND A KORNERUPINE By J. M. DUROC-DANNER...needed a more thorough investigation. A LIGHT PINK PYROPE GARNET A light pink stone of 2.46 carats, marked...was in fact a very nice specimen of a light pink pyrope garnet, which was ascertained by its chemical analysis...difficulties in the identification of the light pink pyrope garnet and the kornerupine lay in the many possibilities |  | Nikolenko, Evgeny I., Lobov, Konstantin V., Agashev, Alexey M., Tychkov, Nikolay S., Chervyakovskaya, Maria V., Sharygin, Igor S., Nikolenko, Anna M. (2020) 40Ar/39Ar Geochronology and New Mineralogical and Geochemical Data from Lamprophyres of Chompolo Field (South Yakutia, Russia) Minerals, 10 (10) 886 doi:10.3390/min10100886 | Journal (article/letter/editorial) | | diamond-bearing lamprophyres from Wawa Superior Province, Canada [7]. Usually, occurrences of K-alkaline...emplacement [8,9]. The rocks of Aldan alkaline province of Mesozoic magmatism, which formed in the ancient...manifestations of alkaline magmatism in the Aldan province of the Siberian craton (Yakutia, Russia), which...their typical mineralogy, including mantle-derived pyrope, Crāspinel, and Crādiopside [19]. The rocks were...formed crustal block [32,33]. Within the Aldan province, multiple alkaline magmatic events occurred in |  | | 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 (35Ā°12' N and...Ghursalak (Gursalak) Pegmatite Field in Konar Province (about 34Ā°57' N and 70Ā°43' to 70Ā°44' E) has yielded |  | | Journal (issue) | | from India ā¢ Emerald mining techniques at the Kagem mine, Zambia ā¢ Yellow grossular from Tanzania ā¢ 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 |  | 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 proļ¬les...VeKhapchan, VIeBirekte, VIIeXII: AldaneStanovoy province; VIIeOlekma, VIIIeCentral Aldan, IXeEast Aldan...those from the Khardakh pipe. However, chromium pyrope reveals typical rounded REE patterns with minima...concentrate, as it was determined for kimberlites from Angola (Ashchepkov et al., 2012). The concentrate from...hundred kilometers to the north-west in the Meimecha Province (Arndt et al., 1995; Kogarko and Ryabchikov, 2000) |  | | Journal (issue) | | Schneider; photo 0 G I A and Tino Hammid. to the pyrope component, Py; all manganese to the spessartine...significantly more magnesium (about 1 wt.% MgO; pyrope content about 4 mole '36). This stone also had...caused by small amounts of other end members such as pyrope, spessartine, uvarovite and, possibly, hydrogrossular...Stockton and Manson's (1985) use of the terms pyrope-almandine, pyrope-spesscirtine, and almandine-spesscirtine...(spessartine) values are exaggerated by 1OOx for clarity. Pyrope contents do not vary significantly i n this stone |  | Ashchepkov, I.V., Logvinova, A.M., Ntaflos, T., Vladykin, N.V., Kostrovitsky, S.I., Spetsius, Z., Mityukhin, S.I., Prokopyev, S.A., Medvedev, N.S., Downes, H. (2017) Alakit and Daldyn kimberlite fields, Siberia, Russia: Two types ofĀ mantle sub-terranes beneath central Yakutia?. Geoscience Frontiers, 8 (4) 671-692 doi:10.1016/j.gsf.2016.08.004 | Journal (article/letter/editorial) | | to 6 wt.% Cr2O3.Pyrope diamond inclusions are not frequent in this pipe. The pyrope trend for the Komsomolskaya...AC C completed with PāT estimates for almandine-pyrope diamond inclusions. They generally show distributions...deeper level near the base of the lithosphere. The pyrope diamond inclusions of dunitic type (Stachel and...Siberia to the time of kimberlite intrusion, because pyrope garnets with up to 16 Cr2O3 (wt.%) occur in the...on age of kimberlites from Yakutian kimberlite province. Doklady RI PT Earth sciences RAN 399,95ā99 |
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