 | | Journal (article/letter/editorial) | | Ni–Cu–PGE POTENTIAL OF THE INSIZWA LOBE, MOUNT AYLIFF INTRUSION, SOUTH AFRICA R. GRANT CAWTHORN§ AND F...Wits, 2050, South Africa ABSTRACT The Insizwa lobe of the Mount Ayliff Intrusion, South Africa, is part...drilling of a borehole into the center of the Insizwa lobe that revealed an abnormally thick ultramafic...indicating prior separation of sulfide. Keywords: Insizwa, Mount Ayliff Intrusion, Karoo magmatism, multiple...magnesian magma, Ni depletion, Sr isotopes, South Africa. SOMMAIRE Le lobe d’Insizwa de la masse intrusive |  | | Journal (article/letter/editorial) | | The Geologyand Geochemistryof the Waterfall Gorge Section of the Insizwa Complex with ParticularReferenceto...Jurassic-aged mafic rocksfrom the Waterfall Gorge sectionof the Insizwa layered complex,Transkei, range...in this unit at Insizwa, however, to accountfor the upward increasein the forsterite content of the cumulusolivine...the productionof the basalgabbro. Introduction Gorge,the sequenceof intrusiverocksand contact THE Karoo-agedInsizwa...The petrographicand major layered intrusions--Insizwa, Ingeli, Tonti, geochemicalvariationexhibitedthroughoutthe |  | | Journal (article/letter/editorial) | | APRIL 1949 KARROO DOLERITES OF THE UNION OF SOUTH AFRICA BY FREDERICK WALKER AND ARIE POLDERVAART CONTENTS...Karroo dolerites 685 Outlying areas in Southern Africa 687 Trias-Lias vulcanicity in Gondwanaland 687...System in the Union of South Africa 597 2. Distribution of Karroo System in Africa 600 3. Map and section...Grey sheet, Queenstown 605 5. Map and section of Insizwa sheet, Mount Ayliff 606 6. Map and section of Elephant's...of Mount Arthur (Kokstad) 621 15. Hornfelses of Insizwa (Mount Ayliff) 626 16. Assimilation product at |  | | Journal (article/letter/editorial) | | association, notably the Insizwa and related intrusions from the Karoo province of South Africa. In addition, the...Chibacheka River intrusion, south-southeast of the town of Noril’sk on the eastern margin of the flood basalt...(Fig. 5A). Olivines are typically fresh, with forsterite contents ranging from 68 to 81 mole percent,...generally consistent with the relatively high forsterite content of the Chibacheka River olivines and...related to the South African Karoo continental flood basalt province, specifically the Insizwa intrusion (Lightfoot |  | | Journal (article/letter/editorial) | | liquid in orthocumulares. The calculation assumes local equilibrium between phases, and that the system...The 90% curve shows shifts o f up to 20 mol.% forsterite. In a natural intrusion, there m a y be a continual...in Cr wards from the base of the Insizwa Complex in South Africa is attributed by Lightfoot et al. (1984)...exchange reactions with country rocks. Both the Insizwa and La Perouse data may be explained more simply...circulating pore fluid. The existence of large local variability in mineral compositions on a scale of |  | | 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 |  | | Journal (article/letter/editorial) | | VANCE (E. R.), 605, manganese ores, 235 Bau mining district, Sarawak, Malaysia, anti721 monian idocrase, 894...FERNANDEZ(L. A.), Phenocrystic olivines from the eastern Azores, 165 Boulangerite, Cornwall, 767 BOUVIER(J...), An antimonian idocrase from the Bau mining district, Sarawak, 894 BRICE (W. R.), see CHANG (L. L....struvite from Skipton, Victoria, 381 Broken Hill, New South Wales, muscovite, myrmekite, 57o Bronzite, Sitathali...; and see CESBRON(F.), 78I BushveM Complex, South Africa, ceylonite, ilmenite, titanomagnetite, 863 Bushveld-type |  | | 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...Artrocitc, Ivigtul cryolitc deposit. Ivittuut municipality. southwest Wi tgreenl Greenland. 73. 1492, ZK |  | | Journal (article/letter/editorial) | | show geopetal indicators. Sulphur isotopes imply a local crustal source of S in these from pyritic sediments...of these sulphide occurrences was controlled by local country rock type. Low Ni/Cu and Pt/Pd ratios, also...abundant pyrite as large cubic crystals. Further south, in the Eskimonaes Segment, the Miki Fjord Macrodyke...xenoliths in the area around the ‘Saddle’ on the eastern side of the dyke (Fig. 3b), as described in the...Zone of the Skaergaard Intrusion on the latter’s eastern side. In addition to gabbroic rocks, it has a granophyric |  | Karykowski, Bartosz T., Maier, Wolfgang D., Groshev, Nikolay Y., Barnes, Sarah-Jane, Pripachkin, Pavel V., McDonald, Iain, Savard, Dany (2018) Critical Controls on the Formation of Contact-Style PGE-Ni-Cu Mineralization: Evidence from the Paleoproterozoic Monchegorsk Complex, Kola Region, Russia. Economic Geology, 113 (4) 911-935 doi:10.5382/econgeo.2018.4576 | Journal (article/letter/editorial) | | to the local addition of water and, potentially, carbon dioxide to the magma, resulting in local small-scale...sulfide liquid accumulation at the base, while the local decrease in magma viscosity facilitated gravitational...intrusions, such as in the Bushveld Complex (South Africa), the Great Dyke (Zimbabwe), and the Stillwater...Monchegorsk Complex. It is located approximately 120 km south of Murmansk on the Kola Peninsula of Russia and...the Nittis intrusion (sample 15NMAS-1). Note the local infiltration of sulfide into the immediate host |  | | Journal (article/letter/editorial) | | FIG. 1. Production of Ni metal from the Sudbury district, together with the companies responsible for the...attention, that of the former Transvaal State in South Africa. Platinum was first recorded in chromitite layers...following October, to that at Onverwacht farther south. It should be emphasized that these pipes, despite...He had been working on the Vredefort dome in South Africa, and came to Sudbury to look for shatter cones...successful in identifying shatter cones in quartzite south of Kelly Lake. His 1964 paper (Dietz 1964) was the |  | | Book (edition) | | Mine; NBH Mine), Broken Hill, Yancowinna Co., New South Wales, Australia; PPL B Anhedral native copper (dark;...Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia (sample: Melcher/Oberthür);...grey); Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Sachsen, Germany (sample: Seifert);...Line), Witwatersrand field, Gauteng Province, South Africa; PPL B Intergrowth of electrum (yellowish white)...quartz (dark grey); New Bullfrog Mine, Bullfrog District, Nye Co., Nevada, USA (sample: Witzke); PPL If |  | | 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...Namibia 6.3.2. Anorogenic metamorphism in the eastern Pyrenees 6.3.3. Anorogenic metamorphism and intraplate...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 |  | | Journal (volume) | | trends between 1969 andand 2002 in South trends between 1969 2002 in South Finland localisation of the ore...using the Ni vs. MgO, Ni vs. Cr and the Ni vs. forsterite content of olivine. Techniques analysing crustal...targets), Thompson Ni belt, Canada (1207/31) and Cape Smith belt, Canada (287/27), the fertility analysis......................................... 207 14.5 Cape Smith belt .......................................After the selection of the exploration area or district, ultramafic and mafic intrusions and extrusions |  | Lightfoot, Peter C., Hawkesworth, Christopher J., Olshefsky, Kevin, Green, Tony, Doherty, Will, Keays, Reid R. (1997) Geochemistry of Tertiary tholeiites and picrites from Qeqertarssuaq (Disko Island) and Nuussuaq, West Greenland with implications for the mineral potential of comagmatic intrusions. Contributions to Mineralogy and Petrology, 128 (2) 139-163 doi:10.1007/s004100050300 | Journal (article/letter/editorial) | | olivines was ®rst recognised at Insizwa in the Karoo Province of Southern Africa (Lightfoot et al. 1984). More... The lavas crop out in Canada on Ban Island at Cape Dyer (Clarke 1970, 1991; Clarke and Upton 1971)...therein), which is believed to come from one of the local dykes. The MaligaÃt and HareoÈen Formations The...There are also many northwest trending dykes on eastern Qeqertarssuaq and Nuussuaq that may have been feeders...Formation. On Qeqertarssuaq, a gneiss ridge runs north±south through the centre of the island, and was an important |  | | Book | | Bushveld chromite–platinum group metals (PGMs), South Africa, Sudbury nickel–copper, Canada, and a few new...occurrences/deposits/mines of six continents: Africa, North America, South America, Asia, Oceania (including Australia)...Earth’s element family. The working deposits in South Africa and Russia are by far the largest for the PGM...significant in Canada, United States, Australia, Africa, Brazil, New Caledonia, Philippines, Indonesia...Caribbean. The largest chromite deposits are in South Africa, Zimbabwe, Kazakhstan, Turkey, Finland, and |  | | 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) | | diopside-hedenbergite, enstatite-ferrosilite, epidote, forsterite-fayalite, johannsenite, natrolite, piemontite...diopsidehedenbergite, cummingtonite-grunerite, forsterite-fayalite: the composition of the samples chosen...hybrid interpretation. Mineral/twin element/nE Forsterite (012) 3.2 Fayalite (012) 3.2 Mg-rich Fayalite...1973). The results are consistent with those for forsterite (Table 5). 3.4.4. Non-Friedelian hybrid twins...hybrid twin with four concurrent sublattices Forsterite-fayalite, Pbnm. The Mg end-member of olivine |  | | Journal (issue) | | a great rarity. However recent discoveric in South Africa mean that g od hand pccimcns arc now readily...adamitecrystal2 mm acrossfrom PuttapaMine, Beltana,South Australia.This image is a combinationof 9 separateslices...per anally may be available through friends or a local ociety. Using the combination technique with a digital...nickeliferous deposits at Waterfall Gorge, Insizwa, Pondoland, Transkei, South Africa. There was insufficient...Canada Sudbury, Canada Ban Phuc, Vietnam Insizwa, South Africa 10.11 10.05 9.80 10.16 9.98 9.89 9.82 9 |  | | Book (volume) | | fissure m chromite pyroxerute, H irose mine, Tari district, Tottori Prefecture, Japan (Kitabara, 1958). Anal...hypersthenc-hornblende dacite, Hudson, Gosfonh area. New South Wales (Wilkinson, l 971). Anal. G . L Z. Kalocsai...top of rbyolite lava, H olmanes, Reydarfjordur, eastern lcelaod (Carmichael, 1963). Anal. I. S. E. Ca.nrucbael...hyperstbene-diopside-plagioclase bomfels, Aavold Quarry, Oslo district, Norway (Muir and Tilley, 1958). Anal. J. H. Scoon...cordierite-beanng xenolithic rock, Haddo House and Arnage district, Aberdeenshire (Gribble, 1968). Anal. C. D. Gribble |  | | Book (volume) | | hypersthene—diopside—plagioclase hornfels, Aavold Quarry, Oslo district, Norway (Muir and Tilley, 1958). Anal. J. H. Scoon...thermally metamorphosed iron-rich rock, Yu hsi kou district, Manchuria (Tsuru and Henry, 1937). Anal. N. F...above 985°C. up to the point of dissociation to forsterite and a liquid. The monoclinic form, clinoenstatite...and Andersen, 1914), and melts incongruently to forsterite and a more siliceous liquid. A reaction relationship...(OH)2Mg3Si4Oio + Mg2Si04 ^ 5MgSi03 + H20 talc forsterite enstatite (OH)2Mg3Si4Oio ^ 3MgSi03 + Si02 + |  | | Book | | Mots inc. Native Gold on Quartz, Paymaster mine, South Porcupine, Ontario / Photo by Brian Boyle. Courtesy...Hendrik van Prehn, who brought the mineral from the Cape of Good Hope. This was the first mineral named after...néche, Sadne-et-Loire, France, or annite, after Cape anionic radical. Thus oxides, sulfides, carbonates...Consolidated Mines. Dutoitspan mine, Kimberley, South Africa. Aheylite (Fe2*,Zn) Alg(PO,)4(OH)3®4H,0, tric...(1989): Mineral. J. 14, 279. Flores mine, Huanuni District, Oruru, Bolivia. Agardite-(La) (La,Ca)Cu¢(AsO4)3(OH)6°3H20 |  | | Report (issue) | | ........................................... 46 South Kalimantan .......................................platinum-group element prospect, Riam Pinang area, South Kalimantan........................................from the Riam Pinang area, Tanah Laut subprovince, South Kalimantan APPENDIX G: Detailed description of rock...paleochannels, South Kalimantan. Figure 15. Photograph of diamonds from near Cempaka, South Kalimantan....flattened gold and PGM particles from near Cempaka, South Kalimantan. Figure 17. Chromitite occurrences in |  | | Book | | making a profit. Initially incorporated in the District of Columbia, the Publishing Company was reincorporated...of the Proterozoic, beginning 3,000 m.y. ago in Africa and 2,500 m.y. ago elsewhere. These basins received...iron ores were concentrated (without silica) in local oxidizing sinks on the con¬ tinents. Uranium responded...Precambrian se¬ quences of rocks were deduced for local areas, but correlations between them, except in... . The main period of ore deposition within a district seems to represent a relatively short time span |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Smithsonian Inst., Washington, D.C. Alan Pring: South Australian Museum, Adelaide, SA, Australia. Gunnar...10. India 11. South east Asia 12. Middle East 13. African Countries, from north to south 14. Oceania 15...15. Australia 16. Antarctica 17. South America The localities section includes a description of the...Oregon Pennsylvania Puerto Rico Rhode Isand South Carolina South Dakota Tennessee Texas Utah Vermont Virginia...Yukon States, Australia New South Wales Northern Territory Queensland South Australia Tasmania Victoria |
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