 | | Journal (article/letter/editorial) | | Stellenbosch, Stellenbosch 7600, Republic of South Africa (Received September 27, 1989; revised and accepted...pre-date the Westerberg dyke-sheet intrusion. D 3 south-verging folds and thrusts are the oldest post-Matsap...Transvaal Basin sediments in Griqualand West, northern Cape Province are bordered by multiply folded orogenic...parts of the Ghaap Group (Table 1) from north to south across Griqualand West regardless of possible structural...amphibolitc, quartzite, juspilite, conglomerate, crocidolite Nelani ] Rooinekke I Naragas (K) Kwakwas Dorodale |  | | 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 |  | | 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...Ltd.) Struik House Oswald Pirow Street Foreshore, Cape Town 8001 First edition 1976 Second edition 1983...©E.K. Macintosh Cover design by Neville Poulter, Cape Town Lithographic reproduction by Tien Wah Press...Ltd, Singapore Photoset by McManus Bros (Pty) Ltd, Cape Town Printed and bound by Interpak, Pietermaritzburg |  | | Journal (article/letter/editorial) | | P E R G R O U P , G R I Q U A L A N D WEST, SOUTH AFRICA N.J. BEUKES Department of Geology, Rand Afrikaans...Afrikaans University, Johannesburg 2001 (South Africa) (Received December 2, 1982; revision accepted August...Iron-formations, Transvaal Supergroup, Griqualand West, South Africa. Precambrian Res., 24: 47--84. Iron-formation...Iron-formation reach a maximum development in a basin near Prieska, whereas orthochemical and allochemical units are...mineralogy, general stratigraphy and associated crocidolite deposits are described by Du Toit (1945}, Cilliers |  | | Journal (article/letter/editorial) | | 1421-1437 CROCIDOLITE FOM AREA, THE SOUTH J. J. LE R. CILLIERS, AND KOEGAS-WESTERBERG AFRICA A. G...to the occurrence of crocidolite (fibrous riebeckite). The various crocidolite-bearingreefs are listed...INTRODUCTION 12½ the CapeProvincedeposits of crocidolite are sporadically developed in a succession of...45 mileswide, which extends from 25 miles south of Prieska to the border of the Bechuana- land Protectoratein...IN,HODGSON,,'IND T.4YLOR BECHUANALAND SOUTH WEST MILES AFRICA 300 MILES i -- i • I SCHALKSDRIFT |  | | Book (edition) | | OF CAPE COLONY THE SOUTH AFRICAN SCIENCE SERIES. EDMONDS' for (H.) ELEMENTARY BOTANY, South Africa...PLANTS AND THEIR WAYS IN SOUTH AFRICA. By BERTHA STONEMAN, Huguenot ton, South Africa. grams, and Map. With...College, Welling- Illustrations, 3s. Dia- 6d. SOUTH AFRICAN FLOWERING PLANTS : for the use of Beginners...AND CALCUTTA. AN INTRODUCTION TO THE GEOLOGY OF CAPE COLONY BY A. W. KOGEBS, D.Sc., F.G.S. AND L...TOIT, B.A., F.G.S. OF THE GEOLOGICAL SURVEY OF CAPE COLONY WITH A CHAPTER ON THE FOSSIL REPTILES OF |  | | Report (issue) | | ••• ••• •• • ••• ••• ••• 11 Union of South Africa •• • -· ' . • •• • •• ••• •• • 14 Canada...amphibole asbestos, including tremolite, actinolite, crocidolite, amosite, and anthophyllite. Of these commercial...fibre. Next in impo1�ance to chi:ysotile come crocidolite and amosite . Tremolite , actinolite, and anthophyllite...three eighths o,f an inch can no,w be spun. Crocidolite or blue asbestoiS, a silicate of iron and sodium...has been found in large quantities on]y in Soutl1 Africa, where it occurs in na1Tow interbedded cross-fibre |  | | Journal (article/letter/editorial) | | 1966, pp. 572-581 ALTERED PYROCLASTIC ROCKS IN SOUTH AFRICAN IRON-FORMATION GENE L. LABERGE ABSTRACT...the iron-formation of the Transvaal Systemin South Africa. It is basedupon observationsmade in the field...Western Australia. The writer spent 2 monthsin South Africa examining,and collecting samplesfrom, a numberof...extensivebelt of iror•-formation in the Transvaal and in the Cape Province. The localitiesat which observations were... Post- masburg,Griquatownand Koegasin the northern Cape Province. 572 ALTERED PYROCLASTICROCKSIN IRON |  | | Journal (article/letter/editorial) | | primitive oils and amino acids extracted from crocidolite, and the oils from amosite and banded ironstone...other polycyclic aromatic hydrocarbons from crocidolite and amosite, but not from chrysotile asbestos...“virgin fibres”, and a natural association between crocidolite and amosite asbestos and the organic matter was...(mg./lOO g. fibre) * ~____._~__.___ Crocidolite Northwestern Cape 12 Trace to 200 Crocidolit,e Northeastern...Research Unit, South African Council for Scientific and Industrial Research, c/o The South African Institube |  | | Journal (issue) | | gemmological organizations or under the aegis of local education authorities. T h e only courses conducted...for those who have not facilities for attending local classes. T h e first official j o u r n a l of the...knowledge of this attractive gemstone. In a part of Northern Cape Province lies Griqualand West, an area which...the country. T h e district of Griqualand West, which was incorporated into Cape Colony in 1871, of arid...area in which is found the blue asbestos called crocidolite. It is here that commercially exploitable deposits |  | | Journal (article/letter/editorial) | | THE THREE PALEOZOIC ICE-AGES OF SOUTH AFRICA ERNEST H. L. SCHWARZ When Mr. Rogers and myself commenced...commenced the systematic geological survey of Cape Colony in 1896, we had no evidence before us which would...or that came home from India, Australia, or South Africa, no one would believe in the Permian Ice Age...skeptical when I first came to South Africa, and at a meeting in Cape Town, when some of the glaciated...produce specimens which would convince headquarters in Cape Town. I sought for specimens of bowlders which were |  | | Journal (article/letter/editorial) | | BANDED IRON FORMATION; THE MARYDALE GROUP, SOUTHERN AFRICA E.S. BARTONl, R.A. ARMSTRONGl, ‘Bernard D.H. CORNELL2...2001 (South Africa) ‘Department of Geology, University of Stellenbosch, Stellenbosch 7600 (South Africa)...detailed investigation of the Marydale Group, southern Africa, follows a preliminary study (Cornell and Barton...to the many banded iron formations in southern Africa. A second objective was to establish a reliable...of the geology in the vicinity of Marydale and Prieska (Fig. 1) have been reported by Vajner (1974)) Cornell |  | | Journal (article/letter/editorial) | | crocidolites By A. A. HoDGso~, B.Sc., Ph.D., F.R.I.C. Cape Asbestos Fibres Ltd., Harts Lane, Barking, Essex...Summary. Sixteen samples of crocidolite asbestos from weathered zones in mines in Cape Province, Transvaal,...characteristics are compared with those of fresh crocidolite from Koegas-Westerberg given by tIodgson, Freeman...reported. The effect of natural weathering on crocidolite tends to a removal of ~ of the OH groups and...to higher temperatures as the Mg content of crocidolite increases. Mg-blocking of this decomposition |  | | Journal (article/letter/editorial) | | minerals is estimated as: amphibole asbestos: crocidolite, tremolite, amosite > erionite > serpentine asbestos:...Some asbestos species, such as the amphiboles, crocidolite, amosite, and tremolite, are pathogenic after...varieties of asbestos, tremolite, amosite, and crocidolite have a high iron content. Iron content of the...chrysotile fairly quickly but amosite and especially crocidolite more slowly, provides insight but does not necessarily...chrysotile (Table 1). Dissolution of Mg shows crocidolite as the least soluble and relatively low solubilities |  | | Report (issue) | | Rhodesia Tanganyika ... Uganda .. .. Union of South Africa Bechuanaland .. Swaziland . . .. Canada .. ...actinolite, amosite, anthophyllite, chrysotile, crocidolite, and tremolite, have some commercial applications...applications, but of these amosite, chrysotile, and crocidolite greatly exceed the others in importance by reason...countries, Canada, Southern Rhodesia, and the Union of-South ·Afrio_a , are in the British Empire. Canada is...Union of Sout_h Africa possesses the only commercial deposits of amosite and crocidolite. The principal |  | | 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; |  | Lantink, Margriet L., Davies, Joshua H. F. L., Mason, Paul R. D., Schaltegger, Urs, Hilgen, Frederik J. (2019) Climate control on banded iron formations linked to orbital eccentricity. Nature Geoscience, 12 (5) 369-374 doi:10.1038/s41561-019-0332-8 | Journal (article/letter/editorial) | | Kuruman Formation in the Griqualand West Basin, South Africa (Supplementary Text 1). This 200 m thick BIF...recognized the same pattern near Prieska, 250 km towards the south. In total, we logged eight characteristic...basin. Photos are from sections Whitebank (a), Prieska (b) and Woodstock (c). LOWSPEC26 noise model confidence...Whitebank (WB), Woodstock (WS), Daniëlskuil (DK) and Prieska (PK). The relief ranges from 0 (deeply weathered...Daniëlskuil–Kuruman area (Supplementary Fig. 4). iiiThe Prieska log only captures the bottom 200 m of the Kuruman |  | | Journal (article/letter/editorial) | | 960-1004 Precambrian Iron-Formations of Southern Africa N.J. BEUKES Abstract From existing information...1966) and Ierru#inous SOUTHERN Africa is definedas that part of Africa sedimentary rockslessthan 15 percentiron...percentiron. In this southof approximately16ø south-latitude and in- paper,the 15 percentboundaryis not...contentbecauseof a generallack of chemicalanalyses. South West Africa, and Mozambique. This rela(2) Iron-formationis...commonlithologic detailedstudyon iron-formation in southern Africa variety of iron-formationand consistsof chert mesoare |  | | Journal (article/letter/editorial) | | of the Griqualand West Sequence, Northern Cape Province, South Africa, in comparison with other Precambrian...Universityof Stellenbosch, 7600 Stellenbosch, South Africa Received 30 August 1993;revised versionaccepted...Asbestos Hills Subgroup (Transvaal Supergroup, South Africa) have been sampled. 142 major and trace element...Geological Survey, Private Bag X112, 000l Pretoria, South Africa. 0301-9268/95/$09.50 © 1995 ElsevierScienceB...should throw light on the problem whether or not the South African BIFs of the Transvaal Basin can be regarded |  | | Journal (issue) | | hunting jobs I got a hot one at a blast furnace in South St. Louis. It was covering the bustle pipe around...Blue Asbestos Mines TD] Timi Associated With The Cape Asbestos Co., Ltd LONDON, ENGLAND July, 1922 [0...don’t hide what you have to sell that people need. Local contractors could well afford this territorial propaganda...valued at $13,885.00, were imported from British South Africa, the balance coming from England. It will be...Asbestos Blue and White Fibres -- Russian South African and Rhodesian Canadian -- Codes A. B |  | | Journal (article/letter/editorial) | | Bbre. Crocidolite, amosite and chrysotile from various parts of the asbestos fields of South Africa, Swaziland... number of similar analyses on apecimens of crocidolite, amosite and Canadian chrysotile. All samples...Swaziland Northern area of the North. western Cape Province Southern areas of Northtiestorn Cape Province...that ammo acids were associated with virgin crocidolite and banded ironstone, and an origin for the oils...to avoid decomposition of chemisorbed solvent by local heating in the vial. A large roller mill used twice |  | | Journal (article/letter/editorial) | | among those occupationally exposed, primarily to crocidolite. Elevated occurrences of mesothelioma have also...miners of crocidolite. White et al. (2008) reviewed environmental mesotheliomas in South Africa and concluded...concluded that crocidolite is far more mesotheliomagenic than amosite. The relative risk for mesothelioma...among Cape crocidolite miners and millers than among miners and millers of amosite or crocidolite from...from the Transvaal region of South Africa. Timbrell (1983) argued that the smaller number of mesothelioma |  | | Book | | publishing worldwide in Oxford New York Auckland Cape Town Dar es Salaam Hong Kong Karachi Kuala Lumpur...Guatemala Hungary Italy Japan Poland Portugal Singapore South Korea Switzerland Thailand Turkey Ukraine Vietnam...Association SAAPAC South African Asbestos Producers’ Advisory Committee SACSIR South African Council for...measurable layer of asbestos dust on the surrounding district. Within weeks of the collapse of the Towers, asbestos...(brown) and crocidolite (blue)—which in the twentieth century were mainly mined in South 1 P.J. Landrigan |  | | Book | | of Canada, and of the Transvaal Supergroup of South Africa, are syntheses considerably superior t o any...University, Auckland Park, PO 524, Johannesburg 2000, South Africa. J.A. BUNTING Exploration Department, BHP...Australia. E.C. PERRY, J R . Department of Geology, Northern Illinois University, De Kalb, Illinois 60115,...DEPOSITIONAL BASIN O F THE TRANSVAAL SUPERGROUP. SOUTH AFRICA N.J. Beukes Introduction . . . . . . . . ..... . . . . . . . . . . . . . . . . . . . . . The Cape Smith-Wakeham Bay basin . . . . . . . . . . . . |  | | Journal (issue) | | Sieving Cleaning and Plant Koegas, at Orange River, Africa. on The ‘‘electrical age’’ is with us, and is...machines: it is only necessary to link them up with a local distributing cireuit—a matter of so many feet of...claim jumping has become a favorite pastime in the district for lack of anything better to do. Chrysotile...Asbestos Mines Griqualand, DD Le a) Associated With The Cape Asbestos Co., Ltd LONDON, ENGLAND August, 1922 ...of South Africa. According to the Department of Mines and Industries of the Union of South Africa, sales |
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Prieska, Siyathemba Local Municipality, Pixley ka Seme District Municipality, Northern Cape, South Africa