 | | Journal (article/letter/editorial) | | Fleischer A rift model for the sedimentary diamond deposits of Brazil Received: 13 January 1997 / Accepted:...discovered in the past 20 years in Brazil, the Brazilian diamond production has been derived almost entirely...entirely from sedimentary deposits: diamond-bearing conglomerates of dierent ages and recent alluvials...alluvials or terraces. Conglomerates as a source of diamond production may not be very signi®cant in economic...of the recent alluvial deposits of Brazil. In this sense, Brazil shows a sharp contrast with other large-scale |  | Karfunkel, J., Chaves, M. L. S. C., Svisero, D. P., Meyer, H. O. A. (1994) Diamonds from Minas Gerais, Brazil: An Update on Sources, Origin, and Production. International Geology Review, 36 (11) 1019-1032 doi:10.1080/00206819409465502 | Journal (article/letter/editorial) | | tandfonline.com/loi/tigr20 Diamonds from Minas Gerais, Brazil: An Update on Sources, Origin, and Production...Geology , Federal University of Minas Gerais , Belo Horizonte, Brazil b Department of Geology , University...University of Sao Paulo , Sao Paulo, Brazil c Department of Earth and Atmospheric Sciences , Purdue University...Svisero & H. O. A. Meyer (1994) Diamonds from Minas Gerais, Brazil: An Update on Sources, Origin, and Production...Inc. All rights reserved. Diamonds from Minas Gerais, Brazil: An Update on Sources, Origin, and Production |  | | Journal (issue) | | The lead article of this issue covers Brazilian diamond production,which reached its peak in the late 1700s...ct natural Fancy Light pink antique pear-shaped diamond set in darkly patinated silver ribbons over gold...notable localities of diamond mining in Brazil, and outlines plans for future diamond production. pg. 3...collector stones • Orangy red cordierite • Cape diamond with yellow phosphorescence • Sapphire filled with...in CVD synthetic diamond • HPHT synthetic melee • Intense green HPHT synthetic diamond • Titaniumdiffused |  | | Journal (article/letter/editorial) | | EconomicGeo/og!t Vol. 84, 1989, pp. 591-602 Diamondsin Brazil and a ProposedModel for the Origin and Distribution...Distribution of Diamondsin the CoromandelRegion, Minas Gerais,Brazil LINDA A. TOMPKINS Rua Aardo Reis 138, Apt...20240, Brazil AND GUILHERME M. GONZAGA HIGS 714 BlocoJ, Apt. 201, Bras•ia-DF, CEP 70380, Brazil Abstract...isshownthatthe distributionandoccurrences in Brazil of diamond-bearing versusnondiamond-bearing kimberli...the geotectonicconstraintsobservedworldwide. In Brazil the distribution of the majorityof the diamondscanbe |  | | Journal (article/letter/editorial) | | (1994) The origin of diamonds in western Minas Gerais, Brazil G.M. Gonzaga 1, N.A. Teixeira 2, and J.C...70380-760 Brasilia, Brazil 2 NTX Consultoria SQN 215 BI. A Apt. 302, 70874-010 Brasilia, Brazil 3 GMP Instituto...Brasilia, Brazil Received: 14 May 1993/Accepted: 1 February 1994 Abstract. I m p o r t a n t diamond mineralized...mineralized alluvium/colluvium occurs in western Minas Gerais (WMG) in the Brasilia Orogenic Belt (700-450...and geothermometric requisites to host primary diamond sources. An analysis of field relations and sedimentology |  | | Journal (article/letter/editorial) | | Brasilia DF, Brazil 2Instituto de Geoci~ncias, Universidade de Brasilia, 70910-900 Brasitia DF, Brazil Received:...subject that has given rise to passionate debates in Brazil, not always based, unfortunately, on scientific...vast majority of the diamonds from the western Minas Gerais (WMG) alluviums, in the Brasilia Orogenic Belt...existence of a "fertile suberatonic lithosphere diamond source under the Alto Paranaiba region". There...criteria only, do not allow the precise location of diamond-rich lithospheric portions. Even in mineralized |  | Leonardos, O. H., Thompson, R. N., Fleicher, R., Gibson, S. A., Svisero, D. P., Weska, R. K. (1996) Comments on the paper by G.M. Gonzaga et al. Mineralium Deposita, 31 (4) 343-344 doi:10.1007/bf02280797 | Journal (article/letter/editorial) | | et al. The origin of diamonds in western Minas Gerais, Brazil O.H. Leonardos 1, R.N. Thompson 3, R. Fleicher... Universidade de Brasilia, 70910-970 Brasilia, Brazil 2Andrade Gutierrez Minera~o 3Department of Geological...Paulo, Brazil 5Departamento de Geocirncias, Universidade Federal de Mato Grosso, Cuiabh Brazil 6Department...kimberlitic diamond source in western Minas Gerais while giving geological evidence for glacial diamond transportation...subcratonic lithospheric diamond source under the Alto Paranaiba region of Minas Gerais has been already established |  | | Journal (issue) | | 0026-4628 'Continued on p. 415 Articles Diamonds in Brazil .................................................Moore Phosphate minerals from the Leveaniemi iron mine, Svappavaara, Sweden .............................Hollabaugh Laueite from Hagendorf-Siid andthe Palermo mine ................. 363 by L. C. Pitman New data...image of a crack hidden in the back (roof) of a mine adit (from A. P. Annan etal. (1988) Radar sounding...Fundao 21.910 Rio de Janeiro, Brazil Since their discovery in Minas Gerais, near the town of Diamantina |  | | Journal (issue) | | found in the seas off the south-eastern USA to Brazil and N. subnodosus in the seas off western Central...Physics/ICEB, Federal University ofOuro Preto, Minas Gerais, Brazil 2. Department of Mining and Geology, Federal...Federal University of Paraíba, Brazil Abstract: Over the past decade, there has been noticeable growth...Laboratory of Great Britain (Shigley et ah, 2000) and Brazil (Ferreira, 1997) have sparked renewed interest...the only garnet variety that does not occur in Brazil (Delaney 1996). Colour-change garnets found in |  | | Journal (article/letter/editorial) | | northern Zaire "(Ebola River, Akati, Rondo and Poko areas) and eastern Brazil (Diamantina area). The...history by making an inventory of the different diamond varieties, both by analysing the most frequent...field can be characterized by its percentage of diamond gemstones, by the average size of the stones (number...(Sutherland 1984; Censier 1991). However, the diamond merchants of the different international buying...extremely competent at identifying the origin of a diamond offering according to its overall crystallographic |  | Fulfaro, V. J., Saad, A. R., Perinotto, J. A. J., Etoherehere, M. L. C., Verolavsky, G. (1997) Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay. International Geology Review, 39 (8) 703-722 doi:10.1080/00206819709465297 | Journal (article/letter/editorial) | | com/loi/tigr20 Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay a a a V. J. Fulfaro ...(UNESP) , Caixa Postal 178, Rio Claro SP, 13506-900, Brazil b Institute de Geologia y Paleontologia, Facultad...(1997) Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay, International Geology Review... Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay V. J. F U L F A R O , A...(UNESP), Caixa Postal 178, 13506-900 Rio Claro SP, Brazil Downloaded by [University of Colorado - Health |  | | Journal (issue) | | SPECTROSCOPIC INVESTIGATION OF A CANARY YELLOW DIAMOND By A. T. COLLINS, B.Sc., Ph.D. Wheatstone Physics...when the luminescence band from a canary yellow diamond at room temperature is examined with a hand spectroscope...1965 Dyer et al(3) had described a new type of diamond which they classified as Type lb. These diamonds...that such a diamond would be classified as a canary yellow by gemmologists. NITROGEN IN DIAMOND It will...plays in determining the optical properties of diamond. (4) Natural Type lb diamonds contain typically |  | GIBSON, S. A., THOMPSON, R. N., LEONARDOS, O. H., DICKIN, A. P., MITCHELL, J. G. (1995) The Late Cretaceous Impact of the Trindade Mantle Plume: Evidence from Large-volume, Mafic, Potassic Magmatism in SE Brazil. Journal of Petrology, 36 (1) 189-229 doi:10.1093/petrology/36.1.189 | Journal (article/letter/editorial) | | GEOCIENCIAS, UNIVERSIDADE DE BRASILIA, 70910 BRASILIA DF, BRAZIL 'DEPARTMENT OF GEOLOGY, McMASTER UNIVERSITY, is8o...plutonic comAlto Paranaiba Igneous Province, in SE Brazil, is one of the plexes at ~ 85 Ma. Reconstructions...is one Late Cretaceous alkaline magmatism in SE Brazil may have of several Cretaceous alkaline igneous...around the margin of the Parana sedimentary basin in Brazil subcontinental lithosphere. Heat penetrating the...from Large-volume, Mafic, Potassic Magmatism in SE Brazil JOURNAL OF PETROLOGY VOLUME 36 Potassic-rich |  | | Book | | Coast. DIAMONDS: FROM BIRTH TO ETERNITY A diamond is rarely found embedded in kimberlite rock. This...update its diamond mining and reeovery inlormation, we asked the assistance ol John Roux, Diamond Information...to present Arthur Wilson’s compilation on the diamond and its origins. Richard T. Liddicoat, Jr. CONTENTS... 413 Index . 449 i\ LIST OF ILLUSTRATIONS Diamond (Color Plate).Frontispiece Lord Rutherford. 4 Radiometric...Radiometric dating. 5 Hannay's experiment. 11 Graphite-diamond equilibrium . 13 Convection cells . 15 Snider-Pelligrini |  | | Book (volume) | | And this in spite of the fact that the richest diamond-bearing rock in the world is a tuffaceous l•nproite...ANDFINSCH KIMBERLIT'ES, SOUTHAFRICA, ANDWILLIAMSON MINE, TANZANIA H.-M. Tsai, O. A. Meyer, 0. Moreau, and...FROM KIFYBERLiTES IN THE COLORADO-WYC•ING STATE mINE DISTRICT 42 M. E. McCal!um, C. D. Mabarak, and... an• L. P. Black KiPzBERLIT•S IN BRAZIL: •i• INITIAL and DIAMOND C. R. Clement, REPORT D. P. Svisero...MINERAL CHEMISTRY OF A KIMBERLITE FROM THE PR•I•IER MINE: I•iPLICATIONS FOR THE EVOLUTION OF KiFmEHLITIC |  | | Journal (issue) | | Liddicoat. 54 Star of the South: A Historic 128 ct Diamond Christopher P. Smith and George Bosshart A history...history and characterization of this famous diamond. NOTES AND NEW TECHNIQUES 66 Identification of Yellow...value for fancy-color diamonds • Diamond with eclogitic inclusions • Diamond with a large void • Genthelvite:...feldspar from Congo • Fluorite from the Rogerley mine, England • Demantoid garnet from Iran • Kyanite...tourmaline has come from Madagascar’s Anjanabonoina mine and contains remarkable color zoning, as shown by |  | | Journal (issue) | | Only four gemstones were ranked as 'precious'—diamond, ruby, sapphire, and emerald, together with pearl... 522 J.Gemm., 1981, XVII, 8 GARNETS FROM UMBA VALLEY, TANZANIA: IS THERE A NECESSITY FOR A NEW VARIETY...Idar-Oberstein, W.Germany ABSTRACT The garnets from Umba Valley, Tanzania, consist of solid solution series of...originate from one or more placer deposits in the Umba Valley, Tanzania, and were first sold without an exact...investigations of other garnet specimens from the Umba Valley. The so called 'Malaya-garnets' are members of |  | | Book | | L.V. 558 Zeilic B.S. 682 648,649 Zhang H. Valley J.W. 83 Zhang P. Vannucci R. 700 Zhang R.Y...Geological-mineralogical system of searching for diamond deposits...1 A kimberlitic lamprophyre and associated...Pakistan.4 Reasons of variations of individual diamond crystals and petrogenetic blocking of rocks in...experimental study on growth and resorption of diamond in kimberlite melt.8 Melting experiments on the....28 Experimental study of fluid conditions of diamond growth...................31 Comprehensive study |  | | Report (issue) | | physicists, and geologists connected with the above River and a small tributary from the west. The ground...from U.S.6eo!o0ibal Survey topographic maps, Meade River and Lookout Ridge quadrangles, Alaska 5 Miles Contour...that the 7-inch casing had been shot in two. A diamond-point pilot bit used to loosen the junk twisted...on the banks of a short tributary of the Kaolak River, a meandering northflowing stream that crosses the...scouting parties; ice bridges were made at the major river crossings. Workers were flown in by "bush" planes |
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