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| the survey by Button and Tyler (1981) in southern Africa. Surfaces of lava flows in continental formations...siUimanite schists, to kyanite schists, and to massive corundum deposits in high-grade gneisses. The data presented...(pre 2.0 Ga) of the Kaapvaal Craton of southern Africa (Fig. 1). Unless otherwise mentioned the data were...unit --~younger cover ~Bushveld Igneous Complex Transvaal Supergroup ~-~ higher formations Halmani Dolomite...Supergroup greenschist belts granites & gneisses corundum deposits north of 25 S ~ [] 200 300, approximate |
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| within the southern Platreef, Bushveld Complex, South Africa T. E. JOHNSON, 1 M. BROWN2 AND R. W. WHITE1...comprise micro-diatexite rich in coarse acicular corundum and spinel, which record evidence for the metastable...cordierite-rich, commonly with spinel but only rarely with corundum. The differing mineralogical and microstructural...presence or absence of certain phases, particularly corundum, is strongly inďŹuenced by the degree of metastable...extremely efďŹcient. Key words: Bushveld Complex; corundum; melting; thermodynamic modelling; xenolith. |
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| characterized by albitite without excess alumina (corundum). The origin of the remaining three bodies is...1955a,fig.1). They are here described from north to south. \\W\\\W APPROXIMATE SCALE 0 yards 0 meters ...Hydrothermal Bodies in Glen Urquhart and North East Transvaal ' 1 A B 2 3 C 39-60 34-46 34-23 30-25 40-93 SiO...chemical composition of plumasite, Turkaspost, N.E. Transvaal. A. L. Hall (1920), p. 132, Feldspar, Analyst...(See explanation in text.) B. Corundum reef, Blydschap, N.E. Transvaal. A. L. Hall (1920, p. 80). Analyst |
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| 329 Corundum twins from Transvaal. By L. J. S P ~ c E ~ , M.A., Sc.D., F.R.S. Deputy-Keeper in the Mineral...t w i n n i n g is of fi'eeluent occurrence in corundum, as evidenced by rulings on the surfaces and by...hitherto been described. There are two twin-laws for corundum crystals, the twin-plane being either r ( 1 0...Goldschmidt in the following: L Bibliography of corundum twins (apart from lamellar twinning).1 P. u ERE~YEEV... vol. 19, p. 1657 1 fig. c-twin of artificial corundum. H. L. BOWMAN,A twin crystal of sapphire, l~Iin |
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| Corundum-Fuchsite Rocks in Greenstone Belts of Southern Africa: Petrology, Geochemistry, and Possible...revisedform 27 Seprember 1 9 8 0 ABSTRACT Unusual corundum-fuchsite rocks with N,03 contents up to 89 per...investigated from two localities in Zimbabwe and Transvaal. They form lenses within volcano-sedimentary series...with metamorphic ultramafics. In Zimbabwe the corundum contains up to 3.8 wt. per cent Cr203,and fuchsite...occasional opaque accessories. The minerals from the Transvaal locality are generally p r e r in Cr203. Important |
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| 1922 No. 3 SOME PROBLEMS OF MINERAL GENESIS IN SOUTH AFRICAl CnanlnsPelecnr, HaroordUni'tersi,ty On the...member of the Shaler Memorial Expedition to South Africa, a tour of several months duration among the...occurrence and genesisof which he has read in the South African literature and some of which he may hope...been so well availed of by the geologists of South Africa that we may regard the problem as solved, at...the coast placers of the former German Southwest Africa could not have been derived from any known pipe |
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| Economic Geology Vol. 62, 1967, pp. 983-991 GEM CORUNDUM PEGMATITES F. W. IN NE TANGANYIKA SOLESBURY...description is given of some pegmatites containing gem corundum. These have recently been exposedcutting a serpentinitebody...TanzaniaGovernmentresultedin the discoverythat the gem corundum is derived from plumasiticpegmatitescutting a...serpentinite. This serpentiniteis exposedon the south bank of the perennialUmba River about45 milesnorthwestof...also presentin another anorthositefound in the south of the body. Due to the paucityof exposuresthesegneisses |
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| - Printed in The Netherlands 175 Sillimanite-Corundum Deposits of Sonapahar, Meghalaya, India: a Metamorphosed...major-element chemistry of the massive siUimanite- corundum and quartz-sillimanite schist does not correspond...presents a unique case where the massive sillimanite-corundum rock demarcates a stratigraphic horizon. In addition...results from the pre-existence of sillimanite and/or corundum minerals (Nixon et al., 1973 ), nowhere do these...explain the rich concentration of sillimanite and corundum in this terrane. An attempt has also been made |
 | | Book (edition) |
| Southern Africa a Collectorâs Guide â Rocks, Minerals and Gemstones of Southern Africa & â - ... T ~ '' .rats en&nes L of Southern Africa A Collectorâs Guide - Struik Publishers (an operating...suggestions and advice. Authorâs Preface Southern Africa has much to offer the amateur geologist, whatever...A line specimen of fluorite from the Western Transvaal n. 8 ⢠Jr â â - .'i Collecting Collecting...calcite fluorspar apatite feldspar quartz topaz corundum diamond (the hardest) As a rough guide: a fingernail |
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| 2010 Available online 13 August 2010 Keywords: Corundum H2O-retention Partial melting Reaction overstep...Platreef magmatic rocks of the Bushveld Complex, South Africa, are mineralogically and texturally zoned, with...with coarse-grained margins rich in acicular corundum, spinel and feldspar and cores rich in ďŹner-grained...thermal stability of the solid phases, in particular corundum, is highly sensitive to the quantity of H2O retained...a result, marginal rocks developed peritectic corundum and spinel with H2O-saturated melt, now preserved |
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| COl\-11\ION\VEALTH COUNTRIES Union of South Africa South-West Africa ⢠Southern Rhodesia ⢠Canada ⢠⢠India...FOREIGN COUNTRIES ⢠⢠⢠Europe Portuguese East Africa Madagascar ⢠⢠United States ⢠⢠Argentina ⢠â˘...exclusive source of the mineral, but in 1938 the South African deposits commenced production.. By the efforts... in this group is vermiculite sensu stricto. In South African golden yellow., '' vermiculite '' replacement...and biotite. Black and dark-brown, iron-¡ rich South African ''vermiculite,,, containing abundant alkali |
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| â˘â˘â˘ ⢠â˘â˘â˘â˘â˘â˘â˘â˘ â˘â˘â˘ â˘â˘â˘ ⢠â˘â˘â˘â˘ â˘â˘â˘â˘â˘ â˘â˘â˘ 2 .50 CORUNDUM, Ceylon. Yellc,w translucent xi. 1 1/4" â˘. ⢠...................................402 CORUNDUM IN SOUTHERN AFRICA. By Robert UV, l\iletcalf .............Mrs. C. W . Lockerbie, Sect'y-Treas. 223 West 9th South Street Salt Lake City 4, Utah We Want The Report...ZODAC PUBLISHED MONTHLY 1947 MAY CORUNDUM IN SOUTHERN AFRICA BY ROBERT W . METCALF1 (Bureau of Mines...war there was a great increase in rhe demand for corundum for use in manufacturing military equipment in |
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| emery and Nel? in corundum-spinelchlorite rocks in the corundum fields of eastern Transvaal. Hoegbomite has...has also been reported from the corundum-rich magnetite ore at Roedstand, Soendmoere,Norway.s Sandrea...Sandreaediscoveredhoegbomite in the spilites of Kamerun, West Africa. 1 Gavelin, A., ueber Hoegbomit. Ein neues gesteinbildendes...Nel, H. J., Papers on the mineralogy of Southern Africa: S. Afrita GeoI Stunny, Mem. 43, 1-8 (1949). 8...the emery and hornfels of Emery Hill and on the south slope of Salt Hill. The Alabama occurrencecould |
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| melt-assisted diapirism in the Bushveld Complex, South Africa T. JOHNSON,1 M. BROWN,1 R. GIBSON2 AND B. WING1...University of the Witwatersrand, Johannesburg 2050, South Africa ABSTRACT Spinelâcordierite symplectites partially...Layered Suite (RLS) in the Bushveld Complex, South Africa (e.g. Uken, 1999). Symplectite development in...euhedral orthopyroxene (up to 20 mm in diameter). Corundum and ďŹbrolitic sillimanite are reported from silica-deďŹcient...andalusite, sillimanite, corundum, quartz, H2O and melt (L). Although orthopyroxene, corundum, sillimanite and |
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| Discoveries of beryl from the pegmatite regions of south-central Montana have been reported from time to...THE TRANSVAAL By T. COLEMAN, 9 Gloucester Ave., Sandringham, Johannesburg, Transvaal, So. Africa For...a decade now, Transvaal has been known for its mineral wealth. Gold, diamonds, corundum, copper, coal...therefore natural that, for the Rockhound, the Transvaal is indeed a happy hunting ground. Those locations...serpentine, asbestos, and rock that resembles Transvaal jade (grossularite) can be found. The serpentine |
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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 âhandbook 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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| their positionsin the stratigraphic column of South Africa and to the ages of the geologic formations hosting...environments. The results of the analysis show that South Africa has an array of mineral wealth with many ch...old, stable crust that constitutes the core of South Africa. Anomalous conditions in the mantle beneath...wealth is due to the substantial ThE Republic of South Africa ranks as one of the most important mineral-producingcountries...estimated total productionof about $101,700 million. South Africa covers about 0.9 percent of the land surface |
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| Rustenburg in thefloor. (particularly normarive corundum), variation in compositionsSuitehavehigherL.O...height,andcomparison ofthegeochemistry Normarive corundum in mafic rocks is an indication of (Hatch etal...contents decline(Fig.11), Roofrocks normative corundum contents arevariable(Fig.9), andsilica exceeds...Immobileelements,suchasTi and P, exhibit normative corundum (Table3), suggests thatCaandSrwere limitedscatter...concentrations forthevarious removed from the corundum-normative flows. Corundumlocalities (Fig. 14) |
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| sphalerite. Corundum: At the Bozeman deposit, southwest of Bozeman (Gallatin County) corundum occurs as...prisms as much as one inch long. Commonly the corundum is associated with feldspar. At the Gallatin deposit...about five miles soudiwest of the Bozeman deposit, corundum crystals occur as euhedral grayish-blue hexagonal...Trap deposit southeast of Norris (Madison County) corundum crystals an inch in diameter are found. Commonly...claim is located in the Emigrant Gulch district, south of Livingston. Muscovite: At Sappington (three miles |
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| '.: f. . ........ ECONOMIC GEOLOGY SERIES CORUNDUM PROSPECT - ON THE FARMHOCHFELD 112 WARMBAD DISTRICT...I I I I I I I I I I ECONOMIC GEOLOGY SERIES CORUNDUM PROSPECT ON THE FARM HOCHFELD 112 WARMBAD DISTRICT... /1 W.W.~6 )~! Et:;-o3b II II II It I I I I CORUNDUM I ON THE I F.AID.~ HOCHFELD NO. WARMBAD...semi-precious . .. ;¡,. reef ~ .. ⢠... -.,;¡.¡¡~. corundum there (?ccura a consider- ;,~i.;.: .. ;â˘...generally ⢠⢠r \w l ., of float that The corundum of course more abundant, far and costly difficult |
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| (2) Mautia* (6) Transvaal-A (1) Macon Co. (1) Cortlandt (2) Toombeola (2) Transvaal-B* (1) Principal...Tanganyika. 88280. 7. Dentz Farm, Letaba district, Transvaal (Nel, 1949). 19628. 8. Fairview Ridge, Macon Co...Ireland. 88283. l l . Dentz Farm, Letaba district, Transvaal (Nel, 1949). 19629. * Unit-cell dimensions determined...green spinel occur intergrown with magnetite in a corundum matrix traversed by pale chloritic veins. No clear...Bores and some spinel grains are hounded against corundum or magnetite without any intervening hSgbomite |
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| illustrating the nature of Archean volcanismin southern Africa and elsewhereare made available for purposesof...whereasantimony, gold, and lesseramountsof mercury,barite, corundum,copper-lead-zinc, and massivesulfideironformationsoccur...mineralization. The Archean mineralization of southern Africa is briefly compared and contrasted with that of...the easternpart southern Africa. of Botswana, the northeasternsegment of South The purposes of this paperare...paperare, briefly,to consider Africa, and Rhodesia,the shield consistsof two crathe nature and distribution |
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| 190 ReviewsâCorundum in South Africa. not surprising that the author finds a considerable similarity...sedimentary petrology. E. H. K. CORUNDUM IN THE UNION OF SOUTH AFRICA. By W. KUPFERBURGER. pp. 81. Bull... Pretoria, 1935. rPHE curious corundum-bearing rocks of the Transvaal are well â˘*⢠known to most petrologists...plagioclase-corundum rocks, with dark mica ; marundite, rocks composed of margarite and corundum with a little...; and corundum-gneisses. Many intermediate types exist. It is now generally agreed that corundum is produced |
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| edingurgh.bgs.ac.uk Š 2004 Geological Society of South Africa ABSTRACT The Moshaneng Complex (southeastern...Complex of South Africa. The Bushveld-age ultramafic, mafic and felsic igneous rocks of southern Africa define...05 Ga large igneous province extending from South Africa into Botswana. Introduction The Bushveld Complex...The Bushveld Complex includes four limbs in South Africa (Eales et al., 1993; Quadling and Cawthorn,...that this complex also extends westward beyond the South African border into the Molopo Farms Complex in |
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| 1617â1624, 2000 Margarite-corundum phyllites from the Appalachian orogen of South Carolina: Mineralogy and...Environmental Sciences, Furman University, Greenville, South Carolina 29613, U.S.A. ABSTRACT Phyllites from...(Central Piedmont) of South Carolina contain porphyroblasts of black corundum in a matrix of margarite...margarite and minor muscovite. The margarite-corundum phyllites formed during Ordovician (?) amphibolite facies...on a whole-rock chemical analysis of margarite-corundum phyllite, the protolith is believed to have consisted |
Soutpansberg Range, Vhembe District Municipality, Limpopo, South Africa