 | Jaguin, Justine, Boulvais, Philippe, Poujol, Marc, Bosse, ValĆ©rie, Paquette, Jean-Louis, Vilbert, David (2013) Albitization in the Antimony Line, Murchison Greenstone Belt (Kaapvaal Craton): A geochemical and geochronological investigation. Lithos, 168. 124-143 doi:10.1016/j.lithos.2013.01.010 | Journal (article/letter/editorial) | | com/locate/lithos Albitization in the Antimony Line, Murchison Greenstone Belt (Kaapvaal Craton): A geochemical...2013 Available online 14 February 2013 Keywords: Murchison Greenstone Belt Antimony Albitization Archean...Kaapvaal Craton a b s t r a c t The 3.09ā2.97 Ga Murchison Greenstone Belt is one of several Archean volcano-sedimentary...volcano-sedimentary belts within the Kaapvaal Craton in southern Africa. Among the diverse ore deposits found within the...for the albitization process. Geochronology on zircon and hydrothermal monazite identiļ¬es a 2.97ā2.92 |  | JAGUIN, J., GAPAIS, D., POUJOL, M., BOULVAIS, P., MOYEN, J.- F. (2012) THE MURCHISON GREENSTONE BELT (SOUTH AFRICA): A GENERAL TECTONIC FRAMEWORK. South African Journal of Geology, 115 (1) 65-76 doi:10.2113/gssajg.115.1.65 | Journal (article/letter/editorial) | | BOULVAIS AND J.-F. MOYEN 65 THE MURCHISON GREENSTONE BELT (SOUTH AFRICA): A GENERAL TECTONIC FRAMEWORK...Society of South Africa ABSTRACT This paper discusses the deformation pattern of the Murchison Greenstone...located in the northeastern Kaapvaal Craton, South Africa. The belt strikes northeast to southwest, is...2009). Our study focuses on the 3.09 to 2.97 Ga Murchison Greenstone Belt (MGB), one of the Archaean greenstone...belts situated on the Kaapvaal craton of Southern Africa (Figure 1). It is located to the northeast of the |  | | Journal (article/letter/editorial) | | characteristics of emeralds from the Leydsdorp area, South Africa J.E. Lum, K.S. Viljoen and B. Cairncross Department...Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa. e-mail: jullieta.lum@gmail.com; fanusv@uj.ac...Society of South Africa Abstract The worldās oldest emerald deposit occurs in the Gravelotte-Leydsdorp...Gravelotte-Leydsdorp area of the Limpopo Province of South Africa. Emeralds have been mined from the main emerald working...and actinolite schists. While the surrounding Murchison greenstone belt has been extensively studied, |  | | Book (edition) | | Southern Africa a Collectorās Guide ā Rocks, Minerals and Gemstones of Southern Africa & ā - ... T ~ '' .rats en&nes L of Southern Africa A Collectorās Guide - Struik Publishers (an operating...suggestions and advice. Authorās Preface Southern Africa has much to offer the amateur geologist, whatever...best plan is to take local advice wherever you are. 9 In small places try the local police station first...usually helpful and will know it there are any local gem clubs and how to get in touch with them. There |  | | Journal (article/letter/editorial) | | REE (La/YbCC = ~0.3), a feature also shared with South African emeralds occurring in Archaean host rocks...across North and South America, Europe, Asia, Africa and Australasia, and they range in inferred formation...study. Region Brazil Madagascar Madagascar South Africa Zambia Australia Class IA IA IA IA IA...emerald mine, Ambalahosy Nord Commune, Mananjary District, Vatovavy Fitovinany Black-wall reaction zones...9.4 Irondro mine, Andonabe Commune, Mananjary District, Vatovavy Fitovinany Black-wall reaction zones |  | | Journal (article/letter/editorial) | | andTraceElementsfromSulfides of Archcan Greenstone Belts in South Africa A Contribution to the Knowledgeof theOlde...the ore contained berton Mountain Land, the Murchison Range, the the least radiogeniclead so far observedon...earth. Pietersburg Schistbelt, and the Sutherland Range. These authorssuggested, amongother possibilities...lyingon a secondary isochron.In the presentpaper Range have been studied in fair detail. Not much an attempthas... LEAD ISOTOPES AND TRACE ELEMENT,5', SOUTH 45 AFRICA 'FA[ā¢I.i.:l. Previous Geochr(;nohā¢gi('al |  | | Book (edition) | | OF OF SOUTH AFRICA MINES GEOLOGICAL SURVEY MINERAL RESOURCES OF REPUBLIC OF THE SOUTH AFRICA...Second World War, and partly as a result of it, South Africa experienced vast industrial expansion. This...official āhandbook on the mineral resources of South Africa, it has become necessary to revise, or rather...great diversity and magnitude of South African mineral deposits and local mining operations, the Economic...Chamber of Mines of South Africa with Mr G. H. Grange as co-ordinator, and the South, African mining industry; |  | Jaguin, J., Poujol, M., Boulvais, P., Robb, L. J., Paquette, J. L. (2012) Metallogeny of precious and base metal mineralization in the Murchison Greenstone Belt, South Africa: indications from UāPb and PbāPb geochronology. Mineralium Deposita, 47 (7) 739-747 doi:10.1007/s00126-012-0422-7 | Journal (article/letter/editorial) | | base metal mineralization in the Murchison Greenstone Belt, South Africa: indications from UāPb and PbāPb...97 Ga Murchison Greenstone Belt is an important metallotect in the northern Kaapvaal Craton (South Africa)...dated at 2,964Ā± 7 and 2,970Ā±7 Ma, respectively (zircon UāPb), while pyrite associated with gold mineralization...AuāSb and the CuāZn VMS mineralization in the Murchison Editorial handling: H. Frimmel J. Jaguin (*) :...Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK J. L. Paquette UMR |  | Hazen, R. M., Golden, J., Downs, R. T., Hystad, G., Grew, E. S., Azzolini, D., Sverjensky, D. A. (2012) Mercury (Hg) mineral evolution: A mineralogical record of supercontinent assembly, changing ocean geochemistry, and the emerging terrestrial biosphere. American Mineralogist, 97 (7) 1013-1042 doi:10.2138/am.2012.3922 | Journal (article/letter/editorial) | | 2005). The worldās largest Hg deposit, the AlmadĆ©n district of central Spain, is representative of concentrations...reworking of the mercury-hosting rocks of the AlmadĆ©n district (primary mineralization 427ā380 Ma) led to at...west-central California. This important mining district, including the New AlmadĆ©n mine in Santa Clara...in the literature. For example, the Hg mining district of Pike County, Arkansas, is hosted in Carboniferous...but we have been unable to find a reliable age range for the subsequent Hg mineralization. Several mercury |  | Fuertes-Fuente, M., Martin-Izard, A., Boiron, M. C., Vinuela, J. M. (2000) P T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN. The Canadian Mineralogist, 38 (5) 1163-1175 doi:10.2113/gscanmin.38.5.1163 | Journal (article/letter/editorial) | | scarce K-feldspar, with apatite, tourmaline and zircon as accessory minerals. In the main zone of the...almandine), apatite (fluorapatite, 3.5 wt.% F) and zircon. Chrysoberyl [Fig. 3A(C)] appears as subhedral...anthophyllite and titanite. Accessory minerals include zircon, apatite and ilmenite. Over a short distance (5...equivalent NaCl. Total homogenization temperatures range between 318Ā° and 369Ā°C in the liquid state and between...% equivalent NaCl. Homogenization temperatures range between 160Ā° and 265Ā°C in the liquid state. The |  | | Journal (article/letter/editorial) | | contrasting common rock-forming minerals like quartz and zircon that have been present throughout geologic Figure...in mica schist matrix from the Murchison greenstone belt, South Africa; 90 Ć 75 mm. Peter Lyckberg, and... Be2AlO4. Twinned crystals from the Ratnapura district, Sri Lanka. Photograph of sample R100130 reproduced...Si8Be2Al2O36] Li2Ca3Be3(SiO4)3F2 CaBe2(PO4)2 (Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28F CaBePO4(OH) (Ca,Na)2(Be...CaBe2Y2Si2O10 Silicate Gadolinite-datolite Be75 Minjiangite Ba[Be2P2O8] Phosphate Be76 Moraesite Be2(PO4)(OH)Ā·4H2O |  | | Journal (article/letter/editorial) | | brief overview of South Africa's mineral industry: world context and changing local circumstances Received:...important South African mineral resources clearly demonstrates that, omitting hydrocarbon fuels, South Africa...PO Box 74883, Lynnwood Ridge, Pretoria 0040, South Africa and later the kimberlite pipes discovered at...1889, the forerunner of the Chamber of Mines of South Africa (COM), whose member companies were ultimately...opencast and underground mines and quarries in South Africa. Of these workings, 57 produced gold, 62 exploited |  | | Report (issue) | | France Colombia: Gonzalo Jara of Bogota, Colombia Africa: Federico Pezzotta from the Natural History Museum...Giuliani Africa: Egypt, Nigeria, Tanzania, . . . . . . . . .52 Mozambique, Zambia, Zimbabwe, South Africa...before Columbus, emeralds were mined and traded in South America, which enjoys its own emerald tradition...zone in the MuzoĀ Coscuez-Pefias Blancas mining district. They are disseminated in black shales or albitized...bitumen, pyrite, monazite, K-feldĀ spar, epidote, zircon and apatite (Ohnenstetter et al 1 998). Under pressure |  | Giuliani, Gaston, Groat, Lee A., Marshall, Dan, Fallick, Anthony E., Branquet, Yannick (2019) Emerald Deposits: A Review and Enhanced Classification. Minerals, 9 (2) 105 doi:10.3390/min9020105 | Journal (article/letter/editorial) | | Precambrian series in Eastern Brazil, Eastern Africa, South Africa, Madagascar, India, and Australia, and younger...River; 16: Lened; 17. Tsa da Gliza. South Africa: 18. Gravelotte. Zimbabwe: 19. Sandawana, Masvingo,...spectraā. Quantitatively, Cr and V substitutions range between 25 [6] and 34,000 ppm [11] for Cr and from...[18], the Muzo mine in Colombia [1], the Mohmand district in Pakistan [1], and Eidswoll in Norway [13]....between 2 and 6 ppm, while Cr-V concentrations range between 100 and 1000 ppm. At the Coscuez emerald |  | | Report (issue) | | Australia Dermot Henry Page 78 Beryl from Southern Africa Bruce Cairncross Page 84 Brazilian Beryl Luiz Menezes...It occurs in magnificent crystals and in a wide range of beautiful colors, the more common of which have...Ā·pH2 O, where R+ represents the alkali ions; n can range from O to 1; and p from 0.2 to 0.8. Feklichev (1963)...lengths of 3 meters, as have those at Tin Mountain, South Dakota. 4m: Beryl crystals have reached 4 meters...weighed almost 24 tons. 8.7m: In Jackalswater, South Africa, the largest beryl crystal recorded was 8.7 |  | | Journal (article/letter/editorial) | | mineralization at Gravelotte, Murchison Greenstone Belt, Northeast Transvaal, South Africa 89 J. E. NIELSON...MALLINSON: Origin and age of phosphorite from the south-central Florida Platform: Relation of phosphogenesis...E. K. PETERS:D-ā0 enriched waters of the Coast Range Mountains, northern California: Connate and ore-forming...element selcnochemistr) ofimmiscible liquids and zircon at Apollo 1115 If: An ion probe study of evolved...and G. E. EXAFS spectroscopy study BROWN JR.: Local environment around gold (Ill) in aqueous chloride |  | | Book (volume) | | Papers and Discussions Volume I , I JOHANNESBURG SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY 1961... 01", ~TALLUf>iYY. Ā© Copyright 1961 by The South African Institute of Mining and Metallurgy Ext'racts...I (1v DEC 196f Printed in t!te Republic of South Africa by Hortors Limited, Johannesburg V r. 1 The...and n1anagement of the gold mining industry in South Africa -C. B. ANDERSON . . . . . . . . . page r J ... ( 2. The economy of the Union of South Africa-W. J. BusSCI-IAU 9 3. An introduction to the physical |  | Brand, A. A., Groat, L. A., Linnen, R. L., Garland, M. I., Breaks, F. W., Giuliani, G. (2009) Emerald Lake Mineralization Associated with the Mavis Lake Pegmatite Group, near Dryden, Ontario. The Canadian Mineralogist, 47 (2) 315-336 doi:10.3749/canmin.47.2.315 | Journal (article/letter/editorial) | | display an increasing thermal metamorphic grade from south to north. Breaks & Moore (1992) subdivided the Ghost... The Taylor pegmatites are situated 340 meters south of the Ghost Lake batholith, within the berylācolumbite...the contacts with the granite are very sharp. Local Geology The Taylor 2 pegmatite consists of three...with the mica and relict K-feldspar crystals. Rare zircon, bismuthinite, nickel arsenides, pyrite, and sphalerite...occur between the layers. Pyrite, ilmenite, and zircon occur as rare grains less than 0.1 mm across. To |  | | Catalog/List | | RAINBOW OF AFRICA GEM & MINERAL COLLECTION Front Cover: Gems from the Rainbow of Africa Collection... Heritage SignatureĀ® Auction #5236 The Rainbow of Africa Collection Gems & Minerals October 15, 2015 | New...SignatureĀ® Internet Session 2 Heritage Auctions Design District Annex 1518 Slocum Street ā¢ Dallas, TX 75207 (HERITAGELive...RAINBOW OF AFRICA COLLECTION You have in front of you our presentation of the Rainbow of Africa Collection:...The mineral riches of Africa are not the only things making up the Rainbow of Africa Collection. For the |  | Groat, L. A., Marshall, D. D., Giuliani, G., Murphy, D. C., Piercey, S. J., Jambor, J. L., Mortensen, J. K., Ercit, T. S., Gault, R. A., Mattey, D. P., Schwarz, D., Maluski, H., Wise, M. A., Wengzynowski, W., Eaton, D. W. (2002) MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON. The Canadian Mineralogist, 40 (5) 1313-1338 doi:10.2113/gscanmin.40.5.1313 | Journal (article/letter/editorial) | | major occurrence of emerald in the Finlayson Lake district of southeastern Yukon. The Regal Ridge showing...Limitedās Goal Net property, in the Finlayson Lake district of southeastern Yukon (61Ā°16.6'N, 130Ā°35.5'W,...axial planar to tight with respect to isoclinal, south-vergent, outcrop-scale folds that are imposed on...prominent foliation are several ArāAr biotite ages that range from 109 to 113 Ma for the rocks in the area (Murphy...veins associated with the emerald mineralization range in width from approximately 0.5 to 1.0 m. At least |  | | Book | | Jewelry, 146 Breastplate of the High Priest, 144 South America, Beryl in the Bible, 80 Emerald and 140...Derivations of Names and Portugal, 490 Republic of South Africa, Romania, 549 601 Yugoslavia, 485 Pakistan... 445 Greenland, India, 500 Republic, South West Africa 445 Ghana, Inner Somali 443 Germany...gemstone pebbles, is also known in from Colors range from paler varieties of beryl that accompany the...then ruby, Lore and 1879). catās-eye, pearl, zircon, coral, soberyl, garnet, carnelian, quartz, and |  | | Book (edition) | | known to occur with compo itions over the entire range. The statement ā¢Ā·compare with ... ā¢ā¢ means that...Gennanium Gold Hafnium Helium Holmium Al Sb A As Ba Be Bi B Br Cd Ca C Ce Cs Cl Cr Co Cu Dy Er Eu F Gd... Meta/lurgical and Mineralogical Society o/ South Africa Journal of Chemical Phy ics Journal cif the...and Proceedings of the Royal Socief) 1 of Ne,v South Wales JPSJ Journal of rhe Physical Society of...Cand CSPG Pennskiye gubemskiye wdomo.sti (Perm district ga=elle) Pl,ilosopl,ical Maga=ine Periodico de |  | Salvi, Stefano, Giuliani, Gaston, ANDRIANJAKAVAH, Prosper Rakatovao, Moine, Bernard, Beziat, Didier, Fallick, Anthony (2017) Fluid Inclusion and Stable Isotope Constraints On the Formation of the Ianapera Emerald Deposit, Southern Madagascar. The Canadian Mineralogist, 55 (4) 619-650 doi:10.3749/canmin.1700017 | Journal (article/letter/editorial) | | of at least part of the pegmatitic elements and local mixing with a metamorphic CO2-rich fluid, leading...at 520 8C for the distal emerald and the dDH2O range measured from the channel of the emerald samples...samples fit within the oxygen and hydrogen isotopic range of values defined for peraluminous granitic magmatism...(Martelat et al. 2000, de Wit et al. 2001) near the district of Benenitra. In the ļ¬eld, this suture zone separates...and minor ilmenite, apatite, quartz, rutile, and zircon (Andrianjakavah et al. 2009). Pargasite locally |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Journal (article/letter/editorial) | | the formation of gem-quality diamonds requires local enrichment of carbon (Stachel 2007). Most gems,...(notably Habachtal in Austria, Leydsdorp in South Africa, and Franqueira in Spain; Grundmann and Morteani...ruby, the details of the atomic environment and local charges around the chromium ion result in a strong...spectrum. The opposite occurs in emerald, in which the local environment is more relaxed, resulting in a looser...(tanzanite), cordierite (iolite), corundum, spinel, and zircon. Size is important in that the rough material must |
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