 | Jaguin, Justine, Boulvais, Philippe, Poujol, Marc, Bosse, Valérie, 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 3.09–2.97 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...in western Africa (Béziat et al., 2008), in Australia (Witt, 1992), and in the Murchison Greenstone Belt |  | | 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 world’s 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, |  | 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) | | 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 |  | | Book (edition) | | Southern Africa a Collector’s Guide ■ Rocks, Minerals and Gemstones of Southern Africa & — - ... T ~ '' .rats en&nes L of Southern Africa A Collector’s Guide - Struik Publishers (an operating...suggestions and advice. Author’s 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 |  | | 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 ‘handbook 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; |  | | Journal (article/letter/editorial) | | orogeny. Pegmatites occur as feldspar--quartz--muscovite bodies or as minor quartz--tourmaline veins. Contact...between the Zambian occurrences and those of South Africa and Zimbabwe. INTRODUCTION The emerald deposits... X × X X 28° 0 10 20 Km SCALE L E GEND AFRICA \ Copperbelt ~Kafubu \ LEm.ml~L ~/'--I / Young...Company in the 1940's and Rio Tinto Mineral Search of Africa in the 1950's. Rio Tinto registered a mining location...others at Fibolele and FwayaFwaya were discovered by local inhabitants. These new discoveries led to prospecting |  | | Journal (article/letter/editorial) | | mineralization at Gravelotte, Murchison Greenstone Belt, Northeast Transvaal, South Africa YIN YIN NwE”*...A~~t-~~d evolution during emeraId inception at the Gravelotte emerald mine has been studied by mi~~e~ornet~...respectively, 250, 150, and 24O”C, and pressures in the range of l-4 kb. Calculations of fo,show an initial low...me~mo~hism. THE GRAVELOTTE AREA LIES along the southern margin of the Archean Murchison Greenstone Belt...Belt of the Kapvaal Craton in South Africa. It is well known for its emerald deposits which are associated |  | | Journal (article/letter/editorial) | | studiesof the I-Iabachtal(Austria)and Leydsdorp(South Africa) emeralddepositsindicatethat the emeraldformationwasnot...(lower schistcover) which is interpreted as The local emeraldsformed during regional metamorphismin an...associatedwith an albitite-pegmatoid, overprintwithin Murchison greenstone belt (Republicof SouthAfrica), whichshowsa...Leydsdorp-Gravelotte emeraldmine.Geologic mapof theareasurrounding theCobrapit, Leydsdorp district,SouthAfrica...thenorthernfacein the Cobraopenpit, Leydsdorp district. The pegmatoidbodies(dotted)are clearlydeformed |  | 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) | | border. Essential minerals are quartz, albite, muscovite and scarce K-feldspar, with apatite, tourmaline...mineral, with quartz in lesser proportion and some muscovite. Within the pegmatitic bodies of greater thickness...subhedral albite, interstitial euhedral quartz, and muscovite plates. In the saccharoidal facies, garnet and...equivalent NaCl. Total homogenization temperatures range between 318° and 369°C in the liquid state and between...% equivalent NaCl. Homogenization temperatures range between 160° and 265°C in the liquid state. The |  | 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,...spectra”. 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 |  | | Journal (article/letter/editorial) | | Devices model F infrared microscope with a wavelength range from 0.8-1.2 pm (CAMPBELLet al., 1984). The band...molybdenites showing range in transparency and zoning. (a) 29GRVB, Gravelotte, South Africa, IR = 1; (b) 98LL...98LL, Lorelei, South Africa, IR = 2; (c) IIKAL, San Manuel, Arizona, IR = 3; (d) 5CACC, Copper Creek Arizona...alteration assemblages form over a temperature range of T x 500-15O”C, which in this study is considered...0 2.0 2.0 4.0 595 58.8 0.47 0.18 GnveIot@ South Africa 29GRVAI 593 0.14 2!?GRVAE 602 0.09 29GRVB 59 |  | | 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 Muzo Coscuez-Pefias Blancas mining district. They are disseminated in black shales or albitized...emeralds must undertake adventurous trips to Africa, Asia or South America. In the United States, the only |  | | 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...·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) | | 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 |  | | Journal (article/letter/editorial) | | 125 Tabular spessartine crystals in muscovite. By EDGAR D. MOUNTAIN,M.A. Professor of Geology, Rhodes...mineral deposits of the area immediately south of the Murchison Range in the NE. Transvaal, a visit was paid...one of the only two producing mica mines in South Africa. Interest very soon centred round the occurrence...Hall 2 of the nature of the occurrence of the muscovite, while the geology of the area surrounding the...the Selati Railway, though best approached from Gravelotte by road, a distance about 22 miles. The mica |  | | Journal (article/letter/editorial) | | Pretoria, South Africa. Current address: Council for Geoscience, P.O. Box 775, Upington, 8800, South Africa...Pretoria, South Africa. e-mail: htheart@postino.up.ac.za © 2006 September Geological Society of South Africa...reporting standards and a good example of this is the South African SAMREC Code released in 2000. In general...this meeting there were general consensus on the SOUTH AFRICAN JOURNAL OF GEOLOGY, 2006, VOLUME 109 PAGE...consistent and growing demand for this mineral from the South African ceramic and glass industries. A significant |  | 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...granodiorite diatexite, with biotite and little muscovite. Large rafts of metasedimentary and metavolcanic...by muscovite, tourmaline, garnet, and potassium-dominant pegmatites, also with abundant muscovite and... The Taylor pegmatites are situated 340 meters south of the Ghost Lake batholith, within the beryl–columbite...the contacts with the granite are very sharp. Local Geology The Taylor 2 pegmatite consists of three |  | | 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...highly-esteemed, Tavernier went shipped from South America to to the Far East and on to suggest |  | | Journal (article/letter/editorial) | | in mica schist matrix from the Murchison greenstone belt, South Africa; 90 × 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)·4H2O...Robinson et al. (1985) Dahl and Foland (2008) South Dakota, U.S.A.a Eirikite 1160 Ilímaussaq complex |  | | Journal (article/letter/editorial) | | India, Madagascar, Namibia, Nigeria, Pakistan, South Africa, Spain, Tanzania, the United States, and Zimbabwe...Canada, the Muzo mine in Colombia, the Mohmand district in Pakistan, and Norway. Beryl has a wide stability...and characterized by the development of albite, muscovite, biotite, tourmaline, and pyrite. Fluid inclusions...abandoned tin deposit near Emmaville in northern New South Wales in 1890 (compositions of Australian emeralds...al., 2002). Australia's most productive emerald district is a 10 km2 area around the village of Poona in |  | 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...Limited’s Goal Net property, in the Finlayson Lake district of southeastern Yukon (61°16.6'N, 130°35.5'W,...axial planar to tight with respect to isoclinal, south-vergent, outcrop-scale folds that are imposed on...prominent foliation are several Ar–Ar 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 |  | | 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) | | 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-“0 enriched waters of the Coast Range Mountains, northern California: Connate and ore-forming...and G. E. EXAFS spectroscopy study BROWN JR.: Local environment around gold (Ill) in aqueous chloride...expression P. M. SAGGER, J. SCHIJF. and H. J. W. DE BA-\R: Trace-metal Mediterranean distributions in |  | | Book (volume) | | Papers and Discussions Volume I , I JOHANNESBURG SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY 1961... 01", ~TALLUf>iYY. © 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 |
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