	Cameron, Eugene Nathan, Desborough, G. A. (1964) Origin of certain magnetite-bearing pegmatites in the eastern part of the Bushveld complex, South Africa. Economic Geology, 59 (2) 197-225 doi:10.2113/gsecongeo.59.2.197	Journal (article/letter/editorial)
	EUGENE N. CAMERON OF SOUTH AND No. 2 PEGMATITES THE BUSHVELD AFRICA GEORGE A. DESBOROUGH ABSTRACT...same origin. The outer forsteritic dunite of the Onverwacht platinum pipe has formed by replacementof bronzititesof...consistentwith structural relations of the core to the Steelpoort Main chromitite seam, as reportedby Wagner and...pegrnatitesin the easternpart of the BushveldComplexof South Africa have been known for many years. The pegmatitesare...pegmatiteare in the platinum-bearing pipes of Onverwacht,Mooihoek,and Driekop,minedchieflyin the 1920's
	Cawthorn, R. G., Harris, C., Kruger, F. J. (2000) Discordant ultramafic pegmatoidal pipes in the Bushveld Complex. Contributions to Mineralogy and Petrology, 140 (1) 119-133 doi:10.1007/s004100000175	Journal (article/letter/editorial)
	University of the Witwatersrand, PO Wits, 2050, South Africa e-mail: 065rgc@cosmos.wits.ac.za C. Harris Department... University of Cape Town, Rondebosch, 7700, South Africa F. J. Kruger Hugh Allsopp Laboratory of the...University of the Witwatersrand, PO Wits, 2050, South Africa Editorial responsibility: A. Hofmann pared...considered to have formed by replacement as a result of local migration of residual magma from the underlying...example, the platiniferous olivine-rich pipes of Onverwacht, Driekop and Mooihoek (Fig. 1b) have been mined
	*Daltry, V. D. C. (1997) Mineralogy of South Africa: Type-Mineral Species and Type-Mineral Names. Handbook* 15. Geological Survey of South Africa**	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
	SCOON, R. N., MITCHELL, A. A. (2011) THE PRINCIPAL GEOLOGICAL FEATURES OF THE MOOIHOEK PLATINIFEROUS DUNITE PIPE, EASTERN LIMB OF THE BUSHVELD COMPLEX, AND SIMILARITIES WITH REPLACED MERENSKY REEF AT THE AMANDELBULT MINE, SOUTH AFRICA. South African Journal of Geology, 114 (1) 15-40 doi:10.2113/gssajg.114.1.15	Journal (article/letter/editorial)
	REPLACED MERENSKY REEF AT THE AMANDELBULT MINE, SOUTH AFRICA R.N. SCOON Department of Geology, Rhodes...Rhodes University, Grahamstown 6140, South Africa e-mail: rnscoon@iafrica.com A.A. MITCHELL School of Geological...4000, South Africa e-mail: mitchaa@mweb.co.za © 2011 March Geological Society of South Africa ABSTRACT...in the eastern limb of the Bushveld Complex, South Africa, differ sufficiently from one another to warrant...In our previous contributions on the Driekop, Onverwacht, and Twyfelaar localities we noted that despite
	Scoon, R. N., Mitchell, A. A. (2004) Petrogenesis of Discordant Magnesian Dunite Pipes from the Central Sector of the Eastern Bushveld Complex with Emphasis on the Winnaarshoek Pipe and Disruption of the Merensky Reef. Economic Geology, 99 (3) 517-541 doi:10.2113/gsecongeo.99.3.517	Journal (article/letter/editorial)
	ROGER N. SCOON† P.O. Box 2461, Rivonia 2128, South Africa AND ANDREW A. MITCHELL School of Geology,...KwaZulu-Natal, Private Bag 54001, Durban 4000, South Africa Abstract Discordant ultramafic bodies are a...significant feature of the Bushveld Complex, South Africa. Many of these bodies form subvertical, cylindrical...probably more abundant in the Bushveld Complex, South Africa (Fig. 1) than is generally realized. The original...into the platiniferous Driekop, Mooihoek, and Onverwacht pipes, which are also located in this sector
	*Cameron, Eugene N., Emerson, M. E. (1959) The origin of certain chromite deposits of the eastern part of the Bushveld complex. Economic Geology, 54 (7) 1151-1213 doi:10.2113/gsecongeo.54.7.1151*	Journal (article/letter/editorial)
	.................... The lower member of the Steelpoort Seam ......................... Significanceof...ratios ............... The middle member of the Steelpoort Seam ......................... Origin of the...1192 1196 1199 1201 1208 Upper member of the Steelpoort Seam ............................... 1209 Leader...adjoining Jagdlust, and Farm Winterveld (424) at Steelpoort. In the present report, the first is referred...to as "Winterveld," the secondas "Winterveld (Steelpoort)." CHROMITE DEPOSITS OF BUSHVELD COMPLEX
	Schiffries, Craig M. (1982) The petrogenesis of a platiniferous dunite pipe in the Bushveld Complex; infiltration metasomatism by a chloride solution. Economic Geology, 77 (6) 1439-1453 doi:10.2113/gsecongeo.77.6.1439	Journal (article/letter/editorial)
	place by Mg2SiO4 + 2FeC12•i • Fe2SiO4 + 2MgCI• . forsterite fayalite Aqueouschloridecomplexesare alsobelievedto...the eastof the pipe.Dunitc to the west of the Onverwacht hortonolite core has a layeredstructurewith...that olivine in Driekop (D), Mooihoek(M), and Onverwacht(O) platiniferous the outer portionsof the Onverwachtpipe...able amountsof platinum,but the restof the pipe mine concentrates of platinum-groupmineralsfrom was practicallybarren...holelogs,and detailedunderground samplingof the The Onverwacht pipe containeda broken-up dunite and countryrock
	*Clifford, T. N., Gass, I. G. - Eds.* (1970) African Magmatism and Tectonics. Oliver & Boyd, Edinburgh.**	Book
	APPRECIATION R. M. Shackleton THE STRUCTURAL FRAMEWORK OF AFRICA Xi 1 T. N. Clifford ARCHAEAN VULCANICITY AND...KIBARIDE AND KATANGIDE OROGENIC BELTS OF CENTRAL AFRICA 97 L. Cahen OROGENIC AND POST-OROGENIC PLUTONISM...SOUTHERN AFRICA 157 O. Von Knorring LATE PALAEOZOIC TO RECENT IGNEOUS ACTIVITY IN WEST AFRICA AND ITS...CONTENTS 12 VULCANICITY AND RirT TECTONICS IN EAST AFRICA B. C. King 13 TECTONIC AND MAGMATIC EVOLUTION...OF DYKES AND RELATED IRRUPTIVE ROCKS IN EASTERN AFRICA 337 \ J. R. Vail 17 GEOCHEMICAL VARIATIONS IN
	Günther, T., Haase, K.M., Junge, M., Oberthür, T., Woelki, D., Krumm, S. (2018) Oxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa – Signals from a recycled mantle component?. Lithos, 310. 332-341 doi:10.1016/j.lithos.2018.04.017	Journal (article/letter/editorial)
	platiniferous dunite pipes of the bushveld complex, South Africa – Signals from a recycled mantle component?...platiniferous dunite pipes of the bushveld complex, South Africa – Signals from a recycled mantle component?...platiniferous dunite pipes of the Bushveld Complex, South Africa – Signals from a recycled mantle component?...Olivine compositions in these pipes range from forsterite (Fo) 80 to 35 mol.% and suggest crystallization...olivine and pyroxene from the Driekop, Mooihoek and Onverwacht pipes show that the parental mafic magmas evolved
	SCOON, R.N., MITCHELL, A.A. (2009) A MULTI-STAGE ORTHOMAGMATIC AND PARTIAL MELTING HYPOTHESIS FOR THE DRIEKOP PLATINIFEROUS DUNITE PIPE, EASTERN LIMB OF THE BUSHVELD COMPLEX, SOUTH AFRICA. South African Journal of Geology, 112 (2) 163-186 doi:10.2113/gssajg.112.2.163	Journal (article/letter/editorial)
	PIPE, EASTERN LIMB OF THE BUSHVELD COMPLEX, SOUTH AFRICA R.N. SCOON Postnet Suite 291, Private Bag X31...Durban 4000, South Africa e-mail: mitchaa@mweb.co.za © 2009 June Geological Society of South Africa ABSTRACT...on the basis of detailed mapping and sampling of mine workings that are not generally accessible. The...Bushveld Complex, South Africa and are situated to the north of the small town of Steelpoort (Figure 1a)....the platiniferous pipes, Driekop, Mooihoek, and Onverwacht, are internationally famous as they are among
	Otto, A., Dziggel, A., Kisters, A. F. M., Meyer, F. M. (2007) The New Consort Gold Mine, Barberton greenstone belt, South Africa: orogenic gold mineralization in a condensed metamorphic profile. Mineralium Deposita, 42 (7) 715-735 doi:10.1007/s00126-007-0135-5	Journal (article/letter/editorial)
	ARTICLE The New Consort Gold Mine, Barberton greenstone belt, South Africa: orogenic gold mineralization...Consort Gold Mine in the Palaeo- to Mesoarchaean Barberton greenstone belt, South Africa is one of the...ultramafic volcanic rocks of the c. 3,280 Ma Onverwacht Group and the mainly metasedimentary rocks of...facies grades (600– 700°C, 6–8 kbar) in the basal Onverwacht Group. Detailed structural and petrological investigations...Private Bag X1, Matieland, 7602 Stellenbosch, South Africa mineralization can be distinguished. Loellingite
	Scoon, Roger N., Mitchell, Andrew A. (2014) Discussion of “The Bushveld Complex, South Africa: formation of platinum–palladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magma chamber” by Maier et al. (2013) Miner Deposita 48:1–56. Mineralium Deposita, 49 (3) 399-404 doi:10.1007/s00126-013-0480-5	Journal (article/letter/editorial)
	DISCUSSION Discussion of “The Bushveld Complex, South Africa: formation of platinum–palladium, chromeand...of Geology, Rhodes University, Grahamstown, South Africa e-mail: rnscoon@iafrica.com A. A. Mitchell School...KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa De Klerk, Canad Mineral 25:51–77, 1987) and...from the Upper Critical Zone at the Amandelbult mine (32 samples), 2 magnesian dunite, Winnaarshoek pipe...of olivine (Fo85-82) (as far as we are aware, forsterite olivine has not been reported from the intrusion;
	*Deer, W. A., Wager, L. R. (1939) Olivines from the Skaergaard intrusion, Kangerdlugssuak, East Greenland. American Mineralogist, 24 (1) 18-25*	Journal (article/letter/editorial)
	to [001].,This olivine is comparable with the Onverwacht hortonolite? from the Bushveld Complex in which...7 Wagner, P. A., Platinum Deposits and Mines of South /,J:rica:Lontlon, pp. 55-59, 1929. EWagner, P. A...approaching hyalosiderite, from Upper Quarry, Driekop Mine. Anal. A. MacJohnson (Wagner, 1929, p. 84). B. Hyalosiderite...coarse-grained hortonolite-dunite 200 ft. level, onverwacht Mine. Anal. R. A. cooper (Wagner, 1929, p. 60) (incomplete...Hortonolite-dunite from outcrop, Onverwacht Mine, Lydenberg District, Transvaal. Anal. II. G. Weall (Wagner
	Scoon, Roger N. (1994) Comment on “Compositional convection in a reactive crystalline mush and melt differentiation” by Stephen Tait and Claude Jaupart. Journal of Geophysical Research: Solid Earth, 99. 11913-11917 doi:10.1029/93jb02664	Journal (article/letter/editorial)
	sgreater than cotectic) of the Mooihoek, and Onverwacht occurin the Critical Zone, not the cumulatesand...collapsestructure,with completeoverturningon the down dip Onverwacht pipe has been proposed as an example of side...metasomatism,i.e., replacementof preexisting Onverwacht. Large xenoliths (slabs) of massivechromitite...Tait and Jaupart's restrictedto this area, and local structuralcontrolsmay be suggestion that a single...DunRe (Core) Magnesian Dunite Driekop Onverwacht Driekop Onverwacht SiO2 37.97 TiO2 0.02 nd O. 10
	O’Driscoll, B., Clay, P. L., Cawthorn, R. G., Lenaz, D., Adetunji, J., Kronz, A. (2014) Trevorite: Ni-rich spinel formed by metasomatism and desulfurization processes at Bon Accord, South Africa?. Mineralogical Magazine, 78 (1) 145-163 doi:10.1180/minmag.2014.078.1.11	Journal (article/letter/editorial)
	and desulfurization processes at Bon Accord, South Africa? B. O’DRISCOLL1,, P. L. CLAY2, R. G. CAWTHORN3...University of the Witwatersrand, PO Wits, 2050 South* Africa Dipartimento di Geoscienze, Trieste University...maﬁcultramaﬁc lavas of the Barberton Greenstone Belt (South Africa). Though now completely mined out, it comprised... metasomatism, desulfurization, Bon Accord, South Africa. Introduction TREVORITE is a rare Ni-rich spinel...Mineralogical Society ~144 Ma Morokweng crater (South Africa), in a paragenesis that also contains unusual
	*Tarling, D. H. (1978) Evolution of the Earth's Crust. Academic Press, London.*	Book
	University of the Witwatersrand, Johannesburg, South Africa D. BRIDGWATER Gr0nland Geologiske Unders@gelse...of Natal, PO Box ·375, Petermaritzburg 3200, South Africa G. A. L. JOHNSON Department of Geology, Science...SUTTON Department of Geology, Imperial College, South Kensington, Lond?n SW7 2A Y, England D. H. TARLING...Southern Paralic Shelf Alpine Belt . Form of the South European Plate Russian Platform and Donets Basin...southern Africa and Australia. The occurrence of komatiite flows in the Barberton Mountains of South Africa
	*Gibson, Sally A. (2002) Major element heterogeneity in Archean to Recent mantle plume starting-heads. Earth and Planetary Science Letters, 195 (1) 59-74 doi:10.1016/s0012-821x(01)00566-0*	Journal (article/letter/editorial)
	igneous successions of Archean (e.g. Onverwacht Group, S. Africa and Superior Province, Canada) and Phanerozoic...Lake; (grey triangles) Al-depleted komatiites, Onverwacht (Theespruit and Komati Fms); (black circles)...circles) Ferropicrites/ferrokomatiites, Onverwacht (Sandspruit and Schapenburg Fms), Wawa, Lake of the Enemy...Greenland and Pechenga; (black diamonds) Iceland and South Atlantic MORB. Symbols for Archean rocks are: (white...(grey triangles) Onverwacht (Theespruit and Komati Fms); (black circles) Onverwacht (Sandspruit and Schapenburg
	*Dixon, T. H. (1981) Gebel Dahanib, Egypt: A late Precambrian layered sill of komatiitic composition. Contributions to Mineralogy and Petrology, 76 (1) 42-52 doi:10.1007/bf00373682*	Journal (article/letter/editorial)
	(Fig. 1). Like many Precambrian exposures in North Africa, the area was intruded by granitic plutons during...(Macrae 1969; Pyke et al. 1973; Arndt 1977), South Africa (Viljoen and Viljoen 1969a, b; 1970), and Australia...related to the Pan-African event followed. Although local examples have not been dated, similar rocks to the...outcrops in Egypt and relative location of Dahanib b) Local Geologic Relations In plan, the Dahanib sill measures...central eastern contact Olivine-clinopyroxene gabbro, south end of central gabbroic zone Anorthositic gabbro
	*Back, Malcolm E., Mandarino, Joseph A. (2008) Fleischer's Glossary of Mineral Species 2008. The Mineralogical Record, Inc.*	Book (edition)
	of the compounds to the other; for example, ..Forsterite. Mg 2SiO,. orth., fom1s a series with Fayalite... Meta/lurgical and Mineralogical Society o/ South Africa Journal of Chemical Phy ics Journal cif the...and Proceedings of the Royal Socief) 1 of Ne,v South Wales JPSJ Journal of rhe Physical Society of...Cand CSPG Pennskiye gubemskiye wdomo.sti (Perm district ga=elle) Pl,ilosopl,ical Maga=ine Periodico de...Abernathyitc, K[(UO 2 )(AsO,)](HP) 3, tet., Fumerole No. 2 mine, Temple Mountain. on the southeast flank of the
	Mossman, D. J., Coombs, D. S., Kawachi, Y., Reay, A. (2000) HIGH-Mg ARC-ANKARAMITIC DIKES, GREENHILLS COMPLEX, SOUTHLAND, NEW ZEALAND. The Canadian Mineralogist, 38 (1) 191-216 doi:10.2113/gscanmin.38.1.191	Journal (article/letter/editorial)
	localities for ankaramitic dikes. Inset: locality map, South Island of New Zealand showing situation of Bluff...remains equivocal. Hornblende ankaramite dike 0.8 km south of Steep Head (OU 25826) This dike contains phenocrysts...Steep Head (OU 54981, 54982) Two dikes about 200 m south of the Steep Head hornblende ankaramite dike, at...primary magmatic minerals by amphibole. MINERALOGY Forsterite Observed compositions (Tables 1, 2) of olivine...compositions are much more magnesian than those of forsterite in the feldspathic wehrlite country-rock, Fo75
	*Nisbet, E. G. (1987) The Young Earth. Allen & Unwin, Boston, MA. doi:10.1007/978-94-011-6489-4*	Book
	geotherms from the granulite facies terrain of South India', 1. Geol. 90, 1982, by permission of the...'Precambrian tectonics and crustal evolution in South India', 1. Geol. 92, 1984, by permission of the...Archaean crust include the ancient nuclei of Southern Africa, parts of the Canadian Shield, Greenland, Australia...settlement in Australia, Canada and in Southern Africa. During this century Archaean rocks have been major...Shield, in Western Australia, in Zimbabwe, in South Africa, in India and also (in territory not once occupied
	Friend, C.R.L., Hughes, D.J. (1977) Archaean aluminous ultrabasic rocks with primary igneous textures from the Fiskenaesset region, southern West Greenland. Earth and Planetary Science Letters, 36 (1) 157-167 doi:10.1016/0012-821x(77)90195-9	Journal (article/letter/editorial)
	upper parts of the Fiskenaesset complex [5,7]) 4 forsterite + spinel + enstatite 4(Mg2SiO4) + MgA1204 + MgSiO3...e b u l k o f t h e 161 183431 forsterite (4) 183450 forsterite (5) 41.2 n.d. 0.05 7.50 51.1 41...at the base of the sequence. 183431: unit 2, forsterite and green spinel rock with some small symplectic...symplectic intergrowths. 183450: unit 3, forsterite and blue spinel rock with minor phlogopite. 183437: unit...comprises randomly oriented prismatic or tabular forsterite crystals up to 3 cm long with interstitial dark-green
	*Stumpfl, E. F., Tarkian, M. (1976) Platinum genesis; new mineralogical evidence. Economic Geology, 71 (7) 1451-1460 doi:10.2113/gsecongeo.71.7.1451*	Journal (article/letter/editorial)
	platinum able information on the ores from the Union mine platinumdeposits.When onebf us (EFS) pubby Kingston(1966)...oœBrynard et al. (1976), cent sperrylite. At Union mine, laurite and ferroVermaakandI-Iendriks(1976), andGasparriniand...latter has also beenrecordedfrom the pipe at Onverwacht(Genkin et al., 1966). In geochemical terms,the...-- 37.6 15.4 2.1 -- 4.0 Outo- kumpu, Vauze mine, Finland Quebec* 21.1 15.6 30.9 -- 0.1 1.3...mechanismfirst copper deposits,irrespectiveof the close local assuggested by Rucklidge. The late positionof memsociationof
	*Barnes, Sarah-Jane (1985) The petrography and geochemistry of komatiite flows from the Abitibi Greenstone Belt and a model for their formation. Lithos, 18. 241-270 doi:10.1016/0024-4937(85)90030-1*	Journal (article/letter/editorial)
	Goodwin (1982) and Pyke (1982). Regional geology Local geology and The Abitibi Greenstone Belt forms part...indicated in Figs. 2 - 7 . More details on the local geology can be obtained from Coad (1979) and Barnes...KOMATIITES OF THE MUNRO GROUP VOLCANICS OF THE HUNTERS MINE GROUP OUTCROP / INFERRED GEOLOGICAL PILLOW TOPS...z / / // o,z t:ig. 12. Phase diagram of forsterite, diopside and quartz, after Kushiro (1979). +...Two approaches were attempted to deduce the forsterite content of the liquidus olivine. Plots of MgO
	*Ohtani, Eiji (1990) Majorite fractionation and genesis of komatiites in the deep mantle. Precambrian Research, 48 (3) 195-202 doi:10.1016/0301-9268(90)90008-e*	Journal (article/letter/editorial)
	this type is the Onverwacht Group from the Barberton greenstone belt of South Africa (Viljoen and Viljoen...to the result of the melting experiment of the forsterite-diopside-pyrope system by Davis (1964). The eutectic...319-369. Davis, B.T.C., 1964. The system diopside-forsterite-pyrope at 40 kilobars and at one atmosphere....Glikson, A.Y., 1982. Komatiite of the Onverwacht Group, S. Africa: REE geochemistry, S m / N d age and...geochemistry of the lower ultramafic unit of the Onverwacht Group and a proposed new class of igneous rocks

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Forsterite from Onverwacht Mine, Steelpoort, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa

Forsterite from
Onverwacht Mine, Steelpoort, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa