 | | Journal (article/letter/editorial) | | Late Archean Reliance Komatiitic Event in the Zimbabwe CratonââMagmatic Architecture, Physical Volcanology...PRENDERGASTâ ,* 1 Carson Close, Greendale, Harare, Zimbabwe Abstract The widespread komatiitic Reliance lithostratigraphic...of the Zimbabwe craton to a generally sulfide poor, shallow-water, platformal facies in the south and east...granitoid-greenstone crust in the north and west, and south and east, respectively. The sills and flow fields...preserved in the north and west, and three in the south and east parts of the craton. The Reliance sills |  | | Journal (article/letter/editorial) | | UltramaďŹc schist Epoch Pyrite, millerite, bravoite, and minor chalcopyrite and pentlandite. Peridotite...Peridotite and dunite cumulate suites Avebury Pentlandite with minor pyrrhotite. talc-carbonate rocks that also...oxides, with a minor amount in group minerals pentlandite Peridotites/ pyroxenites within a high MgO,...Paleoproterozoic Black schist schist belt, Finland South China, Yangtze Platform Early Cambrian East European...Ivanovka deposit at 0.1â0.49 wt.% Talvivaara Pentlandite as inclusions in pyrrhotite, pyrite, pyrrhotite |  | Viljoen, M. J., Bernasconi, A., van Coller, N., Kinloch, E., Viljoen, R. P. (1976) The geology of the Shangani nickel deposit, Rhodesia. Economic Geology, 71 (1) 76-95 doi:10.2113/gsecongeo.71.1.76 | Journal (article/letter/editorial) | | representsone of been collectedfrom these workings. The mine is being activelydevelopedat the presseveralimportantfairly...activities,and as such is virtually uniquein Rho- mine shouldbe aboutof 20 years. The ore reserve of the...3). All serpentinite bandsshowincipient asbestos mine is situated in an area of structural alteration...(antigorite) which often shows some Iobes to the south is 550 meters. replacementby talc and carbonate...two lobes of the structure. A young, roughly south-trending,fault has displaced most of the rocks in |  | | Journal (article/letter/editorial) | | komatiitehosted sulfides from three ore deposits in Zimbabwe were found to be inconsistent with the incomplete...the three Archean komatiite-hosted deposits in Zimbabwe, and I thank Li and Barnes (1995) for their new...together with data for magmatic sulfides from the Alexo mine, Ontario (Barnes and Naldrett, 1986) and Lunnon...komatiite-hosted deposits and the main ore at the Strathcona mine is not a false value. It is the S content of the...sample consisting of about 50% pyrrhotite, 20% pentlandite, 20% chalcopyrite, and 10% pyrite will have a |  | Hofmann, Axel, Bekker, Andrey, Dirks, Paul, Gueguen, Bleuenn, Rumble, Doug, Rouxel, Olivier J. (2014) Comparing orthomagmatic and hydrothermal mineralization models for komatiite-hosted nickel deposits in Zimbabwe using multiple-sulfur, iron, and nickel isotope data. Mineralium Deposita, 49 (1) 75-100 doi:10.1007/s00126-013-0476-1 | Journal (article/letter/editorial) | | models for komatiite-hosted nickel deposits in Zimbabwe using multiple-sulfur, iron, and nickel isotope...ca. 2.7 Ga volcano-sedimentary sequences of the Zimbabwe craton. At both mines, nickel sulfide mineralization...these competing models. Massive ores at Shangani Mine show mass-dependent fractionation of sulfur Editorial...University of Johannesburg, Auckland Park 2006, South Africa e-mail: ahofmann@uj.ac.za A. Bekker Department...mass-independent Î33S values in ore samples from Trojan Mine likely reflects high-temperature assimilation of |  | | Report (issue) | | the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States...the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States...the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States...Text Products Section, U.S. Geological Survey, 604 South Pickett Street, Alexandria, VA 22304-4658 FOREWORD...P. Foose (chief compiler), USGS; Ian Goldberg, South African Department of Mineral and Energy Affairs |  | Holwell, David A., Adeyemi, Zeinab, Ward, Laura A., Smith, Daniel J., Graham, Shaun D., McDonald, Iain, Smith, Jennifer W. (2017) Low temperature alteration of magmatic Ni-Cu-PGE sulfides as a source for hydrothermal Ni and PGE ores: A quantitative approach using automated mineralogy. Ore Geology Reviews, 91. 718-740 doi:10.1016/j.oregeorev.2017.08.025 | Journal (article/letter/editorial) | | almost ubiquitously comprised of pyrrhotite-pentlandite-chalcopyrite(-pyrite). SulďŹde alteration is common...pyrrhotite-pyrite-pentlandite-chalcopyrite; Style 3 pyrite-pentlanditechalcopyrite; Style 4 pyrite-pentlandite-mil...progresses, pyrrhotite is replaced by pyrite and pentlandite by millerite, with concurrent losses in Fe, S...which remains in pentlandite, and is liberated from the sulďŹde assemblage when pentlandite disappears. Selenium...loss of Fe, which would also be consistent with pentlandite ((Fe,Ni)9S8) converting to millerite (NiS); the |  | | Report (issue) | | the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States...the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States...Mineral Policy Sector (MPS); Gabriele I.C. Schneider, South African Department of Mineral and Energy Affairs...resources and mine production by geologic deposit type. . . 5. Distribution of cobalt resources and mine and metal...TABLES Page TABlE 1. 2. 3. 4. 5. 6. World cobalt mine production 1977-83............................. |  | | Journal (article/letter/editorial) | | although the Cu-rich ores of the Norilâsk-Talnakh district, Russia could have evolved through a complex sequence...Transkei (LIGHTFOOT et al., 1984), Norilâsk-Talnakh district, Russia (DUZHIKOV and DISTLER, 1992; CZAMANSKE...sulfide ores and mineral assemblages of the Sudbury district, Canada (NALDRETT et al., 1982; LI et al., 1992)...calculated liquids; 1 is Epoch, 2 is Shangani, 3 is Trojan deposit: Sudbury district and Insizwa complex-solid...main ore from the Strathcona mine and komatiitehosted ore from the Epoch mine with 52.0 at% S to give an |  | | Book | | born hills appear parallel to Mahagiri range due to mine-waste dumping. Unpaved roads serve the movement...The sky is gloomy throughout the day due to the mine and road dust. Social evils, crime, alcoholism,...education, counseling, and training. Making stringent mine-safety rules is not the solutionâit has to be implemented...Bushveld chromiteâplatinum group metals (PGMs), South Africa, Sudbury nickelâcopper, Canada, and a few...ines of six continents: Africa, North America, South America, Asia, Oceania (including Australia), and |  | | Journal (volume) | | isolated patches in eastern and northern Finland; from south to north they are Ilomantsi, Kuhm oSuomussalmi,...lat .. järvi 12 . Ha nnukainen 13 . Rautu .. ara mine 14 . Ju .. kaisenmaa t5 . Taporo" t 6. Jauralsi...allied with the molyb denite. Mätäsvaara is the only mine that has produced molybdenite in Finland. 9 Carbonatite...the Lake Ladoga- Gulf of Bothnia zone and north-south aligned fractures. The deposit is about 16 km long...deposit belongs to the la te Archean metallogenie epoch, about 2600 Ma ago (Kouvo, personal communication |  | | Corporate Document | | Kochbulak-Kairagach ore field 9.5.1 Kochbulak deposit 10. SOUTH AFRICA 10.1 Western Deeps 10.2 Fairwiew 10.3 Renco...16 Corinthia 13.17 Edward's Find 13.18 Polaris South 14. Intermediate and felsic igneous host rocks 14...chalcopyrite, sphalerite, galena, molybdenite, pentlandite, a large set of tellurides, electrum, and gold...arsenopyrite, chalcopyrite, sphalerite, molybdenite, pentlandite, a set of tellurides, native bismuth and native...collapse and stabilisation (1.79-1.77 Ga). The first epoch includes collision of the Kola and Karelian cratons |  | | Journal (article/letter/editorial) | | Intercumulus sulphide blebs are composed mainly of pentlandite and pyrrhotite in magmatic nickel deposit, and...(GonzĂĄlez-Ălvarez et al., 2013b). For example, the Epoch nickel deposit in Zimbabwe was improperly classified as a magmatic...one based on exsolution textures in pyrrhotiteâpentlandite assemblage (Zhang et al., 1986; Wang et al.,...deposit. 2. Geological setting Separated from the South Qinling Orogen by the Mianlue Suture Zone (Fig....intrusions emplaced into the Bikou Terrane and the South Qinling Orogen following the closure of the Mianlue |  | | Journal (article/letter/editorial) | | Western Australia Shangani, Zimbabwe Epoch, Zimbabwe Tronjan, Zimbabwe Ungava, northern Quebec s p...C1 c h o n d r i t e s dunite, Urals India and South Africa U.S.S.R. basanites basal z o n e chromitites...Stillwater Complex, U.S.A., and the Bushveld Complex, South Africa, and an understanding of the PGE geochemical...Ni, Co and S, assuming that the sulphides are pentlandite, chalcopyrite and pyrrhotite. Since all of the...komatiites from Canada, Western Australia and Zimbabwe, the Os and Ir portion of the curve is flat, then |  | Seltmann, R., Soloviev, S., Shatov, V., Pirajno, F., Naumov, E., Cherkasov, S. (2010) Metallogeny of Siberia: tectonic, geologic and metallogenic settings of selected significant deposits*. Australian Journal of Earth Sciences, 57 (6) 655-706 doi:10.1080/08120099.2010.505277 | Journal (article/letter/editorial) | | adjoining the Siberian craton to the north and south; (iv) the Late PaleozoicâMesozoic orogenic belts...Iron oxideâcopperâgold (IOCG) Angara-Ilim ore district: Rudnogorskoe (Fe) Korshunovskoe (Fe) Aldan shield:...east and Ural Mountain Range to the west. To the south, the Western Siberian Lowland extends geographically...MesoproterozoicâDevonian terrigenousâcarbonate rocks, and to the south by OrdovicianâTriassic terrigenous-carbonate rocks...and western part of the Siberian craton to the south (Figure 1) and is part of the Altaid orogenic collage |  | | Journal (article/letter/editorial) | | addition to Fe oxides, with a minor amount in pentlandite in locally sulďŹdic samples. Ore mineralogy is..., Avebury, Australia, Keays et al., 2009; Epoch, Zimbabwe, Baglow, 1986). The lack of understanding of...discovered in 1966 in the PUB (Davies, 1969) in the south of Mt Suckling (Fig. 1), containing grades of up...plates and appears to end the DC prospect to the South (Fig. 1; Lindley and Kirakar, 2007). This bounding...schist of the Owen Stanley Metamorphics outcrops south of the KF, and is unconformably overlain by Pliocene |  | Wu, Chang-Zhi, Xie, Si-Wen, Gu, Lian-Xing, Samson, Iain M., Yang, Tao, Lei, Ru-Xiong, Zhu, Zhi-Yong, Dang, Ben (2018) Shear zone-controlled post-magmatic ore formation in the Huangshandong NiâCu sulfide deposit, NW China. Ore Geology Reviews, 100. 545-560 doi:10.1016/j.oregeorev.2017.02.015 | Journal (article/letter/editorial) | | phlogopite, and elongated grains of pyrrhotite and pentlandite. Hydrothermal overprinted ores 33 are characterized...pyrrhotite is frequently observed. Pyrrhotite, pentlandite, and 35 chalcopyrite in hydrothermal overprinted...36 pyrrhotite, a higher Ni concentration in pentlandite, and high Ag and Cd concentrations, 37 respectively...trace elements of pyrrhotite, chalcopyrite, and pentlandite in sulfide ores of 82 different types were...and the 92 Tarim and North China cratons to the south (Fig. 1A; Allen et al., 1992; Hu et al., 1997; |  | | Journal (article/letter/editorial) | | spatially and genetically related to the pyriteâpentlanditeâchalcopyriteâpyrrhotite sulfide mineralization...mineralization is related to finely dispersed pentlanditeâpyriteâpyrrhotiteâchalcopyrite sulfides, sulfide...INTRODUCTION The Karelian (Paleoproterozoic) metallogenuc epoch is the most productive and economically important...the geological history of the Kola region. This epoch is characterized by economic Ni, Cu, Cr, PGE, V...the Karelian metallogenic epoch are known only in the Lovnozero ore district in the central part of the |  | | Report (issue) | | Platinum-group element mineralization of the Great Dyke, Zimbabwe. In The Geology, Geochemistry, Mineralogy and...International Platinum Symposium in Rustenburg, Republic of South Africa. The abstract volume for this meeting contained...mineralization, in countries like the Republic of South Africa, Canada, and Finland. Over the last five...platinum-group minerals (PGM) beginning with a South African publication (Cabri, 1972) and culminating...of PGE deposits, ranging from the very important South African deposits to less well-developed PGE mineralization |  | | Report (issue) | | ___________________________________ _ Sudbury district _______________________ ~ Discovery and present...lacers-------------------------------Tulameen district __________________ _ Other placers ______________________...provinces ___________________________ _ Republic of South Africa ___ ------------- __ -----Transvaal and Orange...ores ____________ _ Placers of the Witwatersrand district __ History and production _____________ _ General...---------------N oril'sk district ____________ -----_---- _____ _ Petsamo district ___________________________ |  | | Journal (article/letter/editorial) | | 1933; A classification of the lode depositsof south-central Idaho: Ecom Gâ˘oâ˘.., vol. 26, pp. 169-185...the variousdepositsassigned to that metallogenic epoch. For example,there are somedeposits,which, althoughyoungerthan...particularlycloseassociationwith lamprophyres. PRECAMBRIAN EPOCH. The Precambrian metallization is associated with...basalmagmatic segregation of disseminated pyrrhotite, pentlandite, gersdorffite, and chalcopyrite.8 Appreciableamountsof...,is thoughtto be Precambrian. EARLY TERTIARY EPOCH. The early Tertiary metallizationconstituteswhat |  | | Report (issue) | | interest in the geo logy and mineral resources of Zimbabwe which followed the removal of United Nations sanctions...original Bulletin is the insertion of Table IIIA, Zimbabwe Mineral Production and Value, on page 114A. Due...American Corporation of South Africa for views of Wankie Colliery and the Trojan nickel mine, and to the Photographic...near Salisbury. facing page 23 IV Trojan Nickel Mine, near Bindura. facing page 33 V The Great Dyke...Complex. VI Chrome seam in the Great Dyke, Vanad Mine. VII Lower Karoo Landscape. No. 1 Colliery, Wankie |  | Rosengren, N. M., Grguric, B. A., Beresford, S. W., Fiorentini, M. L., Cas, R. A. F. (2007) Internal stratigraphic architecture of the komatiitic dunite-hosted MKD5 disseminated nickel sulfide deposit, Mount Keith Domain, Agnew-Wiluna Greenstone Belt, Western Australia. Mineralium Deposita, 42 (8) 821-845 doi:10.1007/s00126-007-0139-1 | Journal (article/letter/editorial) | | attenuated portion of the AWB, approximately 80 km south of Wiluna (Fig. 1). In the Mount Keith area, the...be traced 30 km north to Honeymoon Well and 9 km south to the Cliffs deposit (Fig. 1). The Monument and...3â5%. The typical sulfide mineralogy comprises pentlandite, pyrrhotite, pyrite and minor millerite, hypogene...paper was conducted synproduction with the MKD5 mine operation and benefited from access to a significantly...significantly larger database of drillcore and mine-related information in comparison to most previous studies |  | Gomez-Caballero, J. A., Villasenor-Cabral, M. G., Santiago-Jacinto, P., Ponce-Abad, F. (2010) HYPOGENE Ba-RICH TODOROKITE AND ASSOCIATED NANOMETRIC NATIVE SILVER IN THE SAN MIGUEL TENANGO MINING AREA, ZACATLAN, PUEBLA, MEXICO. The Canadian Mineralogist, 48 (5) 1237-1253 doi:10.3749/canmin.48.5.1237 | Journal (article/letter/editorial) | | Mexico, is an old, now-abandoned silver mining district worked intermittently since Colonial times until...rocks. Because of the present inaccessibility of the mine workings, only one vein was available for sampling...irregular masses of pyrite, chalcopyrite, and pentlandite a few mm across. On the basis of this stage,...de lâĂtat de Puebla, au Mexique, est un ancien district minier aujourdâhui abandonnĂŠ; le minerai dâargent...masses irrĂŠgulières de pyrite, chalcopyrite et pentlandite quelques mm de long. Sur la base de cette gĂŠnĂŠration |  | | Journal (article/letter/editorial) | | and quartz is recognizedas characteristicof the district. This affectsall rocks associated with ore but...CaptainRoscoeof the â˘Mur- raymine,to Mr. Eagerof theLevack mine,to Mr. Carmichael of the W.orthingtonmineand particularlyto...has givenus the benefitof his knowledgeof the district and checkedup severalof the details of mineral...the detailsand facts of ore occurrencein this district are due. Recently,in â˘9â˘8, Roberts and Longyearâ˘...the following conclusions. Geologicalwork at the mine has disclosedfacts that indicatethe origin of the |
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