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| Tm~ conditions under which diamonds occur in South Africa are quite different from those of every other...almost dug out with a spade. OF DIAMONDS I N SOUTH AFRICA. ~5 It is of greenish or yellowish eolour;...been found in S. Africa. A brief sketch of the various intrusive rocks of S. Africa will help to explain...by doleritic amygdaloids &c., while the "Sundays-River beds" (Middle or Upper Oolite) are not intersected...same time, most interesting eruptive rock in S. Africa is the "Trap Conglomerate," or breccia, apparently |
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| the rock in which the diamonds are found in South Africa, in the various dig~ngs of Du Toit's Pan, Bultfontein...constituent of the rock. It is a mineral of the vermiculite group. Crystals of a fine bright green colour...June 22, 2016 OF THE DIAMANTIFEROUS ROCK OF SOUTH AFRICA. 407 these rock-masses ; and calcite has penetrated...valuable from his having carried with him to South Africa some mineralogical experience. At Bultfontein... always surrounded by crystals of a kind of vermiculite, is more abundant than in the varieties of these |
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| series will be dropped. THE This publication on Vermiculite _is the first of the new issues. Constructional...latter are situated in hot climates, the mineral vermiculite, which is already widely employed elsewhere for...possi-bilities for Colonial vermiculite of good quality. Occurrences of vermiculite are already known in a...In presenting tl1e salient facts concerning vermiculite it is hoped that the search for and development...individuals that are concerned in any way with vermiculite. The assistance of those who have kindly aided |
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| Lichtenburg/Ventersdorp area of the North West Province, South Africa Mike C.J. de Wit University of Pretoria/Tsodilo...7195, South Africa e-mail: dewit@icon.co.za © 2016 December Geological Society of South Africa Abstract...the North West Province are associated with north-south orientated sinuous 'runs' that occur almost entirely...postCretaceous drainage features linked to southward-flowing river systems. Diamonds were discovered in these 'runs'...decreasing in elevation into the Bushveld Basin. To the south of the Lichtenburg – Ventersdorp area, the Malmani |
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| DIAMOND-BEARING ALLUVIAL GRAVELS OF THE UNION OF SOUTH AFRICA DIAMOND-BEARING GRAVELS DRAINAGE WEATHERING...THE ALLUVIAL DIAMONDS THE SOUTH-WEST AFRICA DIAMOND DEPOSITS THE VAAL RIVER ALLUVIAL GRAVELS THE DIAMOND-BEARING...OCTAHEDRON CONTACT TwINS RAisEo MARINE GRAVEL TERRACE RIVER AT THE MoUTH OP THE OLIPHANT's 202. 202. 203....KIMBERLITE, TANGANYIKA TERRITORY SINK-HoLE, HoLFONTEIN RIVER GRAVELS RESTING ON WHITE CLAY GRAVEL TERRACE AT...MOUTH OF THE ORANGE RIVER - 208. CROSS-SECTION, MERENSKY GRAVELS 209. RoorwAL 209. RIVER TERRACES, NEAR MOUTH |
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| 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...reason of the great diversity and magnitude of South African mineral deposits and local mining operations...Chamber of Mines of South Africa with Mr G. H. Grange as co-ordinator, and the South, African mining industry; |
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| Soc., Chem. Metall. and Mining Soc. of South Africa, Amer. Chem. Soc., Amer. Philos. Soc., Roy....members were Association which held its in South Africa. the it Association natural was Diamonds...and Gold in South render authors of the On a by following the Wayside. to of South Phenomena...Diamond Fields Visit to Africa acknowledgments my with Notices Africa, valuable freely from Reunart’s...Reunart’s quoted book Esq., M.A. On the Mode South Africa. On of Occurrence of Diamonds in By Origin |
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| 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... — ■■■k ' k'?-’•' . 7 ■■- -• ■- 1 south of Pofadder. Other areas are Hammanskraal 40 km...North-West Cape; and at Goodhousc on the Orange River cast of Vioolsdrif. In Namibia amethyst can be found |
 | HANSON, E.K., MOORE, J.M., BORDY, E.M., MARSH, J.S., HOWARTH, G., ROBEY, J.V.A. (2009) CRETACEOUS EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE DIATREMES. South African Journal of Geology, 112 (2) 125-140 doi:10.2113/gssajg.112.2.125 | Journal (article/letter/editorial) |
| A. ROBEY 125 CRETACEOUS EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE...Rhodes University, P.O. Box 94, Grahamstown, South Africa email: emilykhanson@gmail.com; j.moore@ru.ac...Kimberley, South Africa email: jock.robey@debeersgroup.com © 2009 June Geological Society of South Africa ABSTRACT...fourteen Group I kimberlite diatremes in central South Africa were examined for upper crustal xenoliths in...eruption (~85 Ma), they were restricted to the south-eastern half of the study area. At the latter time |
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| axes in southern Africa .……..…………………. 6 Drainage evolution in south-central Africa since the break-up...our recent liaison with the Geological Society of Africa through their Secretary for the Southern Region...especially that above the Mashipisa Valley to the south of the iron ore mine. The editor remembers the nightly...Celebration Centre. This was followed by the 5th Africa Mining Conference held in Johannesburg, which was...important because of the World Cup to be held in South Africa, but also because the Geological Survey Department |
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| rise and development of the diamond mines of South Africa, from an historical, economic and technical...when the alluvial diggings existed along the Vaal River only in the near vicinity of Barkly West. The...collect during my many visits to all parts of South Africa where kimberlite deposits occurred and the filing...was necessary to file * "The Diamond Mines of South Africa," by Gardner F. Williams. V . Vl l I I...my attention from the time of my arrival in South Africa was the accidental and cognate inclusions found |
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| 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 |
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| GEOLOGICAL EXCURSION TO THE MINING AREAS OF SOUTH AFRICA by Aberra Mogessie, Christoph Hauzenberger...Department of Geology, University of the Free State, South Africa 1. Preface Almost a year ago Aberra Mogessie...(where we had organized past excursions) and South Africa. Having discussed the matter with Christoph...areas of South Africa. We contacted Christoph Gauert from the University of Free State, South Africa to help...Department of Geology, University of Free State, South Africa. Although there were a large number of students |
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| Metamorphic Minerals 306 Graphite; Asbestos; Talc; Vermiculite 10. Sedimentary Minerals and Sulfur Diamond;...of this text, Dr. Robert Bates, is a native of South Dakota. His graduate education in geology was obtained...prospector; so does the country’s major deposit of vermiculite, at Libby, Montana, which was found because a...Metamorphic Minerals Graphite Asbestos Talc Vermiculite Sedimentary Minerals and Sulfur Diamond Diatomite...hence must be classed as sedimentary. Most vermiculite is probably produced by surface alteration in |
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| Metamorphic Minerals Graphite; Asbestos; Talc; Vermiculite 10. Sedimentary Minerals and Sulfur Diamond;...of this text, Dr. Robert Bates, is a native of South Dakota. His graduate education in geology was obtained...prospector; so does the country’s major deposit of vermiculite, at Libby, Montana, which was found because a...and gravel Slate Sodium minerals Sulfur Talc Vermiculite tional treatment of the nonmetallics, which...Metamorphic Minerals Graphite Asbestos Talc Vermiculite Sedimentary Minerals and Sulfur Diamond Diatomite |
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| 130 Iodine 138 Sulfur Talc 260 265 274 Vermiculite 145 Magnesite & magnesia Manganese minerals...comfort. Users of chromite, who must the USSR, South Africa, Albania, and wish that chromite deposits were...Republic of South Africa by the Department of Mines and the Geological Survey of South Africa; such profiles...Greece to Czechoslovakia, Mexico to Canada, South Africa to Jordan, and Australia to Sri Lanka. Industrial...cadeerrs 2 BAgts ’ (942 , & we es wis: ef i Vaal 4). ee. ae pantera _« af) ie i aici tet as. |
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| kaolin, bentonite, zeolites, diatomite, or vermiculite, while category 3 stands out by the aesthetic...at Blind River-Elliot Lake,placers Canada,and and paleoplacers. Witwatersrand, Modern Africa occur in...conglomerates at(1900 Blind River-Elliot Canada, and Witwatersrand, South Proterozoic such as the Tarkwa...World-classLake, deposits are at Witwatersrand, South Africa occur in stratigraphic series thatdodeveloped...when the Earth’s atmosphere was different from Africa, Elliot Lake, Canada, Sierra Jacobina, Brazil, |
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| former part of the Territory lying to the south of the Molopo River, known as Bechuanaland or British Bechuanaland...part of the Cape Province of the Republic of South Africa, is not included. The compiler would gratefully...Afr. Proceedings of the Geological Society of South Africa. Johannesburg. Proc.Rhod.sci.Ass. Proceedings... Leeds. S.Afr.J.Sci. South African Journal of Science. Johannesburg. South African Mining and Engineering...Engineering Journal. Johannesburg. South African Mining and Engineering Yearbook. Johannesburg. S.Afr.Min |
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| 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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| Struik Nature (an imprint of Penguin Random House South Africa (Pty) Ltd) Reg. No. 1953/000441/07 The Estuaries...Century City, 7441 PO Box 1144, Cape Town, 8000 South Africa Visit www.randomstruik.co.za and join the Struik...published edition, 2015: Penguin Random House South Africa (Pty) Ltd Publisher: Pippa Parker Managing editor:...Hatfield Campus, University of Pretoria Pretoria, South Africa Dr Lynnette Greyling Department of Geological...Town Private Bag X3 Rondebosch 7701 Cape Town, South Africa Note: The authors and the publishers cannot |
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| INVESTIGATED IN OUR LABORATORY KNHPP E B.RTESLIMITED AFRICA HOUSE, KINGSWAY, LONDON, W.C.2 Telephone : CHA...-Uganda . • • • • • • • 191 BOOK REVIEWS Africa. A Study in Tropical Development. By L. D. Stamp...141 143 146 ABSTRACT ECONOMIC DEVELOPMENT IN AFRICA, AUSTRALIA AND IN MANY OTHER PAR'I'S OF...summer in some communities (U.S.G.S. 1950). In South Africa, the developments of agriculture, forestry,...continent is checked by insufficient water. Throughout Africa, this problem is of the utmost importance. In many |
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| I. The Diamond Chapter Cape II. ... 45—59 South-African or Diamonds III. Australian Diamonds... only superficial, impossible dis- to and South-African from all Beryl have appears these localities;...and in Brazil; fairly been India, Brazilian, South-African, phrases than the expressions The Emerald...Australia, — they loosened in their they South Africa our force against most imbedded found...home, primal in mountains. are at ; were river-beds. frequent most as When they limited |
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| where it should be—in the Natural History Museum in South Kensington—while the American stones are apparently...1970. 21, 2, 159.—Ed. 119 GROWTH FEATURES IN SOUTH AFRICAN EMERALD CRYSTALS By R.M. YU, Ph.D. Physics... ABSTRACT Growth features in thirty pieces of South African emerald crystals have been studied by transmission...crystals are chosen from one thousand carats of South African emerald rough. These crystals are in nearly...pit have been observed in the {lOTO} faces of the South African emerald crystals: (i) Hexagonal pyramidal |
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| Subscription im United States, North, Central and South America, $3.00 per year; other countries, $4.00...Francisco 3, California Telephone Market 1-8930 South 155 Sherman Street, Box 2185 Spokane 5, Washington... e An important iron ore producer in the Iron River district of the Menominee Range in Michigan Gyratory...Contents may without SUBSCRIPTION U.S., North, South and American Countries Inc. not be reproduced...: is and metallurgical plants in Europe and Africa. Because of the vast distances involved most of |
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| t a t e d Bibliographies of Mineral Deposits in Africa, Asia (exclusive of t h e U S S R ) a n d Australasia...him. I have tried to include all ore districts in Africa, Asia (exclusive of the U.S.S.R.)> and Australasia...incluir todos los distritos mineros conocido en Africa, Asia (con exclusion de la Union Soviética), y...Greenland. This volume covers mineral deposits in Africa, Asia exclusive of the U.S.S.R., and Australasia...Philippines, and Japan are included with Asia. In South Africa, the deposits are arranged by prov inces, in |
