 | | Journal (issue) | | in minerals. V Q( er IO nc pl SU m Ste wl dr th N, w _,..,,..,w..,...,,..,,..,...............extensively as a scouring and cleans>f ing powder. es Dr. E. H . Barbour has described this IS volcanic ash...county f ulgurites have been described in detail by Dr. E. H. Barbour of the Nebraska State Museum and A...Sioux County, Nebraska. They were first collected by Dr. E. H . Barbour and described by him in the Proceedings...were first discovered, recognized and described by Dr. E. H . Barbour in 1910 and later de- scribed in |  | | Book | | Missing Label and a Wooden Box The Deposits of the Tshikapa Region The Mbuji-Mayi Deposits The Future J....November, 1926, in Namaqua- land. A German geologist, Dr. Hans Merensky, identified alluvial deposits on the...Elsewhere, other countries such as the Belgian Congo (now Zaire) and Angola were producing and selling...other source—Lichtenburg, Namaqualand, the Belgian Congo, Angola, and other sources as yet undiscovered....since the early twentieth century was tracked down by Dr. John Williamson in 1940, when he located the largest |  | | Journal (issue) | | MILFREEPUB Director, Continental European Operations Dr. Walter F. Vogeno STAFF CORRESPONDENTS: Africa—Johannesburg...Wherever these copper ores are processed—in Belgian Congo—you’ll «+The machines crushing practice... wide...by Diamang in Angola, Forminiére at Tshikapa and Bakwanga, Congo Republic, by CAST in Ghana, SLST in...Africa, at Williamson in Tanganyika, and Bakwanga, Congo Republic is first transported to a central concentrating...Forestiére Miniére du Congo (et al) Companhia de Diamantes Sierra Leone Dig Tshikapa, de Angola Trust |  | | Report (issue) | | Switzerland • •• U.S.S.R. (Russia) Angola Belgian ••• Congo • • • • -.. • •• ••• •• • • •• • •• •...refractometer with a fixed scale, such as that devised by Dr. Herbert Smith, or one of the modern improved forms...the alluvial fields of Angola. a.n d the Be1lgian Congo. The syndicate made a cont1~act with the prodt1ce1·s...production of low-grarde stones in the Belgian Congo, the Gold Coast and other alluvial fields in Africa...J11alachite.-R.ussia, Rhodesia, United States, Belgian Congo. " • - 19661 B 2 80 : .World's Production |  | | Book | | III. 40 Magnetic map of the Indian Ocean floor. 42 Dr Richard B. Hargraves . 46 The Emperor Seamount Chain...Hot Spot Theory of Brazil kimberlites. 62 Dr Gordon Davis. 65 Dr John J. Gurney . 70 Geological Succession...Rhodes . 94 Diamond in kimberlite (Color Plate). 95 Dr Edna Plumstead . 97 Reconstruction of scene when...Africa . 98 Continental Shields of the Earth. 101 Dr P. A. Wagner. 108 The Hope Diamond (Color Plate)...central Kimberley showing "Big Eive" diamond mines. 143 Dr J. D. Kramers . 146 The Premier Rose (Color Plate) |  | | Corporate Document | | AND NAMOYA CONCESSIONS, DEMOCRATIC REPUBLIC OF CONGO Prepared for: Banro Corporation Prepared by:...Figure 1.2: Location within Democratic Republic of Congo ..................................................Maniema provinces of the Democratic Republic of Congo (DRC) since 1995. Political unrest and legal title...AND NAMOYA CONCESSIONS, DEMOCRATIC REPUBLIC OF CONGO 1 INTRODUCTION 1.1 Terms of Reference Steffen...Exploitation Permits in the Democratic Republic of Congo (DRC). Steffen, Robertson and Kirsten (UK) Ltd |  | | Report (issue) | | 27 Chad . . . . . . . . . . . . . . . . . . . 31 Congo . . . . . . . . . . . . . . . . . . 33 Cote d'Ivoire...Heydari is a mining engineer and mineral economist. Dr. Heydari has worked in California, Colorado, and...platinum-group metals (PGM), titanium minerals (ilmenite and rutile), vanadium, vermiculite, and zircon...petroleum and diamonds in Angola, petroleum in the Congo and Nigeria, gold in Ghana, bauxite in Guinea, uranium...'32 82 620 10 Central African Republic 414 Congo 115 Cote d' lvoire 510 178 17,000 5 15 (2) |  | | Book | | HongKong Barcelona Budapest Professor Dr. A. B. KAMPUNZU Professor Dr. R. T. LUBALA Laboratoire de Petrologie...thank Springer-Verlag, the publishers, especially Dr. W. ENGEL (Geosciences Editorial) for the prompt...continental trough on the southern borders of the Congo and Thnzania cratons, though comparable in size...zones bordering respectively south and north the Congo craton (Fig. 1) has been recently compared (Popoff...between the West-African and the Sao Francisco-Congo cratons. Ultimately, as a rough estimate, three |  | | Book | | Liberia, the People's Republic of the Congo (formerly French Congo, with its capital and Burundi, a...reaching a competent South African mineralogist, Dr. W. G. Atherstone, who pronounced the find to be...that some believed spelled the end of the diamonds. Dr. Atherstone and others correctly surmised that the...later diamonds were found in the — — Belgian Congo. In 1925 large alluvial finds were made at Lichtenburg...produced by new fields in Angola and the Belgian Congo that were then being developed by Forminiere, a |  | | Book (edition) | | R. Webster of the London Gemmological Laboratory; Dr. E. Giibelin, of Lucerne; Mr. R. Liddicoat, Director...Industrial Diamond Review; Dr. J. B. Hawthorne, Chief Geologist, De Beers, Kimberley; Dr. J W. Harris, Grant...University of Edinburgh; Dr. D. Elwell, Stanford University, California, U.S.A.; Dr. Robert Gaal, Gemological...Consolidated Mines, Dr. Judith Mi£lledge, Dept. of Crystallography, University of London; Dr. Godehard Lenzen...the first to the third century B.c. according to Dr. Godehard Lenzen. The Hope diamond, to which stories |  | | Book | | Central African Republic \ Ghana Congo Democratic Republic of the Congo Tanzania INDlAls OCEAN ATLANTIC...time-consuming project. In this respect, the case of Dr. John Williamson, who worked in colonial Tanganyika...other locations on the continent, including the Congo in 1906; Namibia in 1908; Tanzania in 1910; Angola...including in Angola, Sierra Leone, and the Belgian Congo. During the 1930s, as purveyors of the ultimate...not “gem quality”—was centered on the Bel¬ gian Congo, from the mines of the Forminiere company. With |  | | Book (edition) | | This book is respectfully dedicated to the memory of Dr. John Sinkankas for his kind initiative and support...by Strunz (1996). Thanks to the kind permission of Dr. E. Nagele from the E. Schweizerbart'sche Verlagsbuchhandlung...arisen with localities in Congo-Zaire: the country, named Democratic Republic of Congo since 1960, was changed...There is also a country called Republic of Congo or simply Congo (capital Brazzaville). Information about...Precambrian dolomite near Kinshasa, Dern. Rep. of Congo. AM 57, 394-398, 1982. Allabogdanite (Fe,Ni) 2P |  | | Book | | Chromite, native platinum, some magnetite and ilmenite; d iamond; corundum Lithium-bearing minerals...tstanding placer minerals. Mon az ite, zircon, ilmenite, a nd rutile a re important in some beach placers...of South Africa, 16; France, 3; Republic of the Congo, 3; Australia, 3. Among some other ores not listed...production Country Metal Congo, Republic of the (formerly Belgian Congo) Cobalt Niobium-tantalum Tin...present in Brazil, Argentina, the Republic of the Congo, Austra lia, a nd perhaps the Soviet Union. Four |  | | Journal (issue) | | FREEPUB Director. Continental F uropean Operations Dr. MILFREEPUB Charles Publish L. Shaw Street Manager...MINING WIDE FOR Algeria etaaie Congo Republic Republic of the Congo Ghana Kenya Morocco M-zembique Nigeria...and im- proves separating efficiency. Dr. Franz Rodis and Dr. J. Creme: The use and recovery of...pulps for reuse. The investi- gation was made by Dr. A. W. Last, chief, and Mr. K. F. Marquardson, a...leucoxene sample clean concentrate investigated ilmenite from the by electrostatic 45 means alone, |  | | Book (edition) | | EQUATORIAL AFRICA 13 Middle Africa from Chad to Congo 279 14 Zai:re 311 PART FIVE EASTERN AFRICA 15...states of Nigeria 66. Economic map of Gabon and Congo 67. Economic map of Cameroon 68. Economic map of...Anglo-Egyptian Sudan Basutoland Bech uanaland Belgian Congo Congo (Kinshasa) Fernando Po a French Somaliland French...French Soudan b Gold Coast Madagascar Moyen Congo c Northern Rhodesia Nyasaland Portuguese Guinea Rio...of Afars and Issas Mali Ghana Malagasy Republic Congo (Brazzaville) Zambia Malawi Guinea (Bissau) Spanish |  | | Book | | bedroom and handed me my mail order copy of Professor Dr. Edward J. G0belin's new book 'Internal World of...From a gemological stand point, one word describes Dr. G0belin. That word is Inspirational. Micromlamellar...as it now exists, would not have been possible. To Dr. Byron C. and JoAnn Butler. This book would not have...remember the 'tuna tower,' long gone but not forgotten. Dr. Nikolai Sobolev. Through your research and publications...gemology, and a curiosity of its many mysteries. To Dr. Frederick H. Pough. I grew up on your teachings |  | | Book (edition) | | also be The c*xtra< tion of pota-^h liom alimitr is dr.^^crila'd und<‘r riia following drsrrij^tions of...the nelsonite dikes, an unusual associa¬ tion of ilmenite, apatite, and rutile, that are found near Piney...can he molded andr>nng. (A few clays, surh as kaolin and flint clay...calcite gypsum, hornblende, garnet, titanite, ilmenite, soluble alkaline salts, and so on’ together with...per cent of the work s total by weight. Belgian Congo is the largest producer and accounts for 00 to /O |  | | Journal (issue) | | Ideas.” WE DEDICATE this special Proceedings issue to Dr. Vince Manson, whose heart and considerable intellect... Harlow, Ed., The Nature of Diamonds, Dr. T. Anthony and Dr. J. Casey The General Electric Company ...diamonds. Acknowledgments: The authors thank Dr. Thomas Anthony and Dr. John Casey of GE Corporate Research &...dikes; St–star fissure; T–Tortiya alluvials; Ts–Tshikapa alluvials; V–Venetia pipe; Vo–Vaal/Orange Rivers...estimated to be: Botswana 26 Mct, South Africa 14 Mct, DR Congo 14 Mct, Angola 5 Mct, Namibia 2 Mct, rest of Africa |  | | Book (edition) | | pointed out errors of omissions in the first edition. Dr Kurt Nassau has been most helpful in advising on...based mainly on his information. My thanks go to Dr W E Smith of Chelsea College of Science and Technology...minerals which forms the first part of the book. Dr W Stern advised on the part dealing with the marketing...kindly prepared for me by Mr G A White of Norwich. Dr E Gübelin allowed the use of some of his excellent...appropriate here to mention that Plates I–XVI appeared in Dr E Gübelin’s Edelsteine, and are reproduced by courtesy |  | | Book | | chrome enstatite, pyrrhotite, pyrite, pentlandite, ilmenite, rutile and coesite. In recent years Giibelin...give a mosaic pattern characteristic of the gem. Ilmenite skeletons and foils of biotite may also be found...crystals is called birefringence or double refraction (DR). Polarized light Light passing through an anisotropic... subtracting the lower from the upper to get the DR. The intermediate value, /?, then corresponds to...crypto-crystalline types of quartz such as onyx show a DR of about 0.006. This does not alter as the stone | | | Book | | chrome enstatite, pyrrhotite, pyrite, pentlandite, ilmenite, rutile and coesite. In recent years Giibelin...give a mosaic pattern characteristic of the gem. Ilmenite skeletons and foils of biotite may also be found...crystals is called birefringence or double refraction (DR). Polarized light Light passing through an anisotropic... subtracting the lower from the upper to get the DR. The intermediate value, /3, then corresponds to...crypto-crystalline types of quartz such as onyx show a DR of about 0.006. This does not alter as the stone |  | | Book | | of America, 485 Zaire 601 (formerly Belgian Congo), Zambia, 602 485 Zimbabwe Norway, 486 (formerly...acknowledge the assistance of of those years by Dr. a of persons and San by the main Diego library...CA; Peter G. Denver, CO; Prof. B. Carroll Embrey, Dr. Paris, Museum (Natural Chatham, British France;...AZ; Carl Krotki, W. E. David Eidahl, History); Dr. Eugene Fallbrook, E. NY; XV Foord, Wardreques...Gilson, small Dr. Peter Bancroft, Fallbrook, Bassett, ians Mr. Atkins and Mrs. Brunton; Dr. or Morgan |  | | Journal (volume) | | adventurers as in the early days, with examples from the Congo and the great Northern Territory of Australia. ...of The Leopoldville. junction the of of Tshikapa, village the Lovua river at with the Kasai...munition difficulties created by the war, and we are Tshikapa, escorted by Lieutenant Heide, with 50 soldiers...Societe Internationale Forestiere et Miniere du Congo, company tal is interested. office at in Travelling...Heide routed their forces, and the expedition pro- Congo State to investigated by this expedition hopes |  | | Book (volume) | | based mainly on his information. My thanks go to Dr. W. E. Smith of Chelsea College of Science and Technology...minerals which forms the first part of the book. Dr. W. Stern advised on the part dealing with the marketing...kindly prepared for me by Mr. G. A. White of Norwich. Dr. E. Gibelin allowed the use of some of his excellent...appropriate here to mention that Plates I-X VI appeared in Dr. KE. Giibelin’s Edelsteine, and are reproduced by...pearl surface photomicrograph specially for me, and Dr. EK. H. Rutland, Mr. B. W. Anderson, Mr. R. K. Mitchell |  | | Book | | resulting 44 1 hematite, goethite 2 Ti0 2 3 ilmenite Pig. 6 Mineral composition of weathering crust...- black sands consist of 8 - 10 % zircon, 75 % ilmenite, 6 - 8 % sillimanite, 3 - 4 % rutile, 2 - 7.5...ta· bles, electromagnetic separation magnetite+ ilmenite Preparation Chemical, physical and technological...washing along the Kasai River near the town of Tshikapa (since 1909) and along the Bushimaie River near...limestones, cherts, and blocks of yellow ground with ilmenite, garnet and scarce eclogite boulders, fills karst |
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