 | | Report (volume) | | Fl.~o~.iSP:~.,~r of'Atrica Fluorspar Resources of Africa By RALPH E. VAN ALSTINE and PAUL G. SCHRUBEN...resources of Africa. (Geological Survey bulletin ; 1487) Bibliography: p. 1. Fluorspar-Africa. I. Schruben...environments and types of fluorspar deposits ---------------------Fluorspar production and exports---...exports--------------------------------------Fluorspar reserves --------------------------------------------------Outlook...ILLUSTRATIONS Page PLATE 1. Map of Africa showing the location of fluorspar and carbonatite deposits, rifts |  | | Journal (article/letter/editorial) | | the Witwatersrand, Private Bag 3, Wits 2050 South Africa email: kinnairdj@geosciences.wits.ac.za F.J...the Witwatersrand, Private Bag 3, Wits 2050 South Africa email: krugerj@geosciences.wits.ac.za R.G....Wits 2050 South Africa cawthorng@geosciences.wits.ac.za © 2004 Geological Society of South Africa ABSTRACT...marginal tectonism of the Kaapvaal craton in the Limpopo belt, which may have been a longer-lived event...also infiltrated and engulfed country rock (eg Buffalo). These fluorites have variable but low 87Rb/86Sr |  | | Journal (article/letter/editorial) | | mineralisation in granites of the Bushveld Complex, South Africa L. J. Robb, L. A. Freeman and R. A. Armstrong...mineralisation in granites of the Bushveld Complex, South Africa. Transactions of the Royal Society of Edinburgh:...mineralisation in granites of the Bushveld Complex, South Africa L. J. Robb, L. A. Freeman and R. A. Armstrong...deposits and the exogranitic, sediment-hosted Rooiberg mine) which is dominated by polymetallic sulphide ores...Klipkloof Granite and the Makhutso Granite. However, local terms for Nebo Granite varieties, such as the Bobbejaankop |  | | Report (issue) | | Future Supply 0 0 0.5 1 1 INCH 2 CENTIMETERS Fluorspar Figure 1 Professional Paper 1802–G U.S. Department...Number 1 (Minerva) Mine, Cave-in-Rock subdistrict, Illinois-Kentucky fluorspar district, showing the sequence........................G12 Carbonatite-Related Fluorspar Deposits......................................................G13 Alkaline-Intrusion-Related Fluorspar Deposits............................................G13 Alkaline-Volcanic-Related Epithermal Fluorspar Deposits..................................... |  | | 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) | | Valley-type (MVT) deposits, Transvaal Supergroup, South Africa Stephen E. Kesler a,⁎, Martin Reich a,b , Marlon...Neoarchean–Paleoproterozoic Transvaal basin in South Africa, which were deposited before the 2.4 to 2.0...Paleoproterozoic Transvaal Supergroup of southern Africa ⁎ Corresponding author. Tel.: +1 734 763 5057;...sulfate-rich basinal brines transport metals to local areas containing reduced sulfur (Anderson, 1983;...the Transvaal and Griqualand West basins in South Africa and the Kanye basin in Botswana (Fig. 1). These |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, Johannesburg, 2050, South Africa Current address: Department of Geology, Rand...Box 524, Auckland Park, Johannesburg, 2006, South Africa e-mail: glgy13@na.rau.ac.za L.J. Robb EGRI-HAL...2050, South Africa e-mail: robblj@geosciences.wits.ac.za © 2004 Geological Society of South Africa ABSTRACT... Located in the central northeast region of South Africa, north of Pretoria (Figure 1), the Complex is...deposits, such as the now-defunct Zaaiplaats Tin Mine near Potgietersrus in the northern limb of the Complex |  | | Journal (article/letter/editorial) | | been found outside the Soviet Union. Fluorite (fluorspar) is a very important mineral, essential to the...upper seam. The sandy type consists mainly of calcite (average 65%), fluorite (20.4%), barite (6.2%)...and phillipsite), with adularía, quartz, opal, calcite, montmorillonite, and other minerals. The fluorite...currently being formed in lakes in various parts of Africa, Asia, and other continents. For example, rift...pro vided by the monazite-fluorite Buffalo deposit in South Africa [31], which occurs in a region where |  | | Report (issue) | | barite crystals, Minnie Pool Global trends in fluorspar production V 21 . 22 . 23. 24. 25 . 26 . 27.................... Typical specifications for fluorspar grades .........................................Western Australia has no recorded production of fluorspar,but contains two large deposits at Speewah and...economic trends until the turn of the century. After South Australia, Western Australia has been the largest...clastic rocks. Some examples are those in the Dierks district in Arkansas (USA), and barite rosettes of Oklahoma |  | | Book | | Sandstone and related materials Feldspar 106 Fluorspar Garnet Graphite 110 Slate Sodium sulfate ...major producing districts, or a representative district if there are many. We name the chief mining companies...supply must come not merely from one district but from a single mine. Thus the physical properties of many...eclipsing the mineral magnesite in some areas; the trona mine rather than the Solvay plant is now the main source...comfort. Users of chromite, who must the USSR, South Africa, Albania, and wish that chromite deposits were |  | | Journal (article/letter/editorial) | | Aparejo Creek and north of Sheep Creek, 800 meters south of the Mormon Ranch (Aparejo Point 7½ minute quadrangle...the Idaho batholith was eroded, resulting in the local deposition of arkosic sediments. Volcanism was initiated...identified as magnetite; ilmenite was not observed. Calcite occurs in small patches, usually together with...occasionally appears as remnants in monazite and calcite in Lemhi County, Idaho, suggesting that allanite...and included in monazite in the Buffalo fluorspar mine, South Africa. Although they did not specifically |  | | Report (issue) | | niobium in Brazil; and platinum-group elements in South Africa and Russia), thus increasing the risk for supply...Ba), beryllium (Be), cobalt (Co), fluorite or fluorspar (fluorine, F), gallium (Ga), germanium (Ge), graphite....B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agency’s...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012............................F2 Graph showing world cobalt mine and refinery production and apparent consumption |  | | Journal (article/letter/editorial) | | ( C03)_,-H20, including the minerals fluorite, calcite, bastnaesite, parisite, synchysite, and fluocerite...assemblage and, in the presence of synchysite or calcite, is also restricted to low or high pressure, respectively;...temperatures; (4) that bastnaesite + synchysite + calcite is restricted to high P-T conditions; (5) that...that parisite reacts to form bastnaesite and calcite at high temperatures (~620°C at 1 kb); and (6) that...bastnaesite, which occurs in association with calcite, dolomite, and bar&e. Parisite and synchysite have |  | | Book | | 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 |  | | Report (issue) | | Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States of...Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States of...Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States of...Hammerbeck, Geological Survey of the Republic of South Africa; Richard N. Crockett (retired), British Geological...- - - - -- ----- - ---- - - -- -- -- 13. Average mine and mill production costs per metric ton of ore |  | | Book | | 1. Mafic dyke swarms in the Kaapvaal Craton, South Africa 189 3.4.2. The Mackenzie dyke swarm, Canada...controls of intracontinental alkaline magmatism in Africa 194 3.5.2. The Damaraland alkaline province, Namibia...intraplate magmatism around the Vredefort Dome, South Africa 6.3.4. Metamorphism and fluid generation; metamorphogenic...Bushveld lgneous Complex, South Africa 8.2.3. Molopo Farms Complex, South Africa and Botswana 8.3 Magmatic...ofthe Damara and Irumide orogens, Soutbwestern Africa, and the Mid Continent Rift System, USA 9.3.1. |  | | Book | | Corporation of South Africa, the Chair of Economic Geology at Rhodes University, South Africa, and since...appointments at the Astrobiology Centre, University of New South Wales, Sydney, and the China University of Geosciences...which has included work in Europe, southern Africa, South East Asia, New Zealand, the southwest Pacific...Felsic Phase of the Bushveld Igneous Complex, South Africa . . . . . . . . . . . 4.3.6 The Sn-W Deposits.... . . . . . . . 4.4.4 Sabie-Pilgrim’s Rest, South Africa . . . . . . . . . . . . . . . . . 4.4.5 Capricorn |  | | Book | | 447 467 491 Company Index 503 Tables: World Mine Production of Gold, Silver and Base Metals 5A2...Mining OFFICES: 5011 Meadowood Way Paradise Peak Mine Suite 300 (100% FMC Gold) * Sales Reno, Nevada...Elko, Nevada (303) 292-7500 Royal Mountain King Mine (100% FMC Gold) Copperopolis, California Beartrack... Gold's price fell to levels at which half the South African gold mines, probably half those in Australia...have been widespread, especially in the highcost South African mines. Some say a structural change is taking |  | | Report (volume) | | fluid phase. Zoning can also be controlled by the local presence of immobile cations such as Cr3+. Sánchez-Viscaíno...of relic chromite grains strongly influenced the local composition of epidote, which results in a very...of Fig. 15c). These features indicate that the local environment significantly influences the growth...former fine-grained basaltic rocks, thus creating a local chemical environment dominated by Ca and Al. If...phengite, and clinozoisite (also depending on the local position in the center or in the rim of the pseudomorph) |  | | Book | | the former National Institute for Metallurgy (South Africa). Since the middle 1970's, there has been a...Geostandards Pty. Ltd., 655 Botany Road, Roseberry, New South Wales 2018, Australia. ANRT Association (see GIT/IWG)...Technology, Private Bag X3015, Randburg 2125, South Africa. NBS National Bureau (now NIST). NIM National...SABS South African Bureau of Australia. of Standards, Private Bag X191, Pretoria 0001, South Africa...purity magnesite (ECRM 751-1) BCS 392 BAS fluorspar BCS 393 BAS limestone AWI-1 B7 BAK-1 BCR-1 |  | | Book | | pairs of dacitic rocks. Metamorphism will cause local redistribution of REE if new minerals are formed...Scotia, Canada, despite the development of some local metasomatic zones, and the movement of other elements...Found in a cleavelandite pegmatite at H^ydalen, South Norway, as an irregular l u m p altering o n the...Wyoming; in an altered alkaline rock in the Zeerust District, Transvaal; from the Vuorijarvi pluton, U.S.S...Ce,Na,Sr)C0 . Orthorhombic. Occurs in dolomite-calcite carbonatite 3 veins from the Vuorijarvi Massif |
|
