 | | Journal (issue) | | Geological Society of Zimbabwe Newsletter June, 2009 Geological Society of Zimbabwe G Z S Newsletter...SOCIETY OF ZIMBABWE, P.O. BOX CY 1719, CAUSEWAY, HARARE Geological Society of Zimbabwe Newsletter ...of the Zimbabwe Craton ā¦ā¦ā¦ā¦ā¦ā¦ā¦..ā¦ā¦..ā¦ā¦ā¦ā¦.... 9 Karoo Large Igneous Province, Botswana-Zimbabwe .........2008. Relationship between Shamva Danton and Shamva Mine ore bodies ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦.. 13 Nomination...ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦.. Geology Department, University of Zimbabwe ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦.. Geological Survey Department |  | | Journal (article/letter/editorial) | | Platinum-Group Element Mineralisation in the Great Dyke, Zimbabwe, and its Relationship to Magma Evolution and Magma...Prendergast 1 Carson Close, Greendale, Harare, Zimbabwe. e-mail: marprend@hotmail.com ABSTRACT The platinum-group...magma chamber. Introduction The Great Dyke of Zimbabwe contains the worldās second largest single resource...Main Sulphide Zone: at the time of writing, the Mimosa mine is commencing major expansion, open-cast operations...operations recently began at the Ngezi mine and further work is being carried out at the Unki prospect (see |  | | Journal (article/letter/editorial) | | in the oxidized Main Sulfide Zone, Great Dyke, Zimbabwe Marek Locmelis & Frank Melcher & Thomas OberthĆ¼r...Great Dyke mafic/ultramafic layered intrusion of Zimbabwe, economic concentrations of platinum-group elements...Beneficiation . PGE oxides Introduction The Great Dyke of Zimbabwe is a 2,575.4Ā±0.7-Ma-old mafic/ ultramafic layered...cutting Archean granites and greenstone belts of the Zimbabwe Craton (Prendergast 1988; OberthĆ¼r et al. 2002)...the baseāmetal refinery (Evans 2002). At Hartley Mine, the recovered grades of Pt and Pd from pristine |  | | Journal (article/letter/editorial) | | 0022-3530/92 $3.00 The Geology of the Great Dyke, Zimbabwe: Crystallization, Layering, and Cumulate Formation...ultramafic to mafic rocks in the Great Dyke of Zimbabwe and is referred to as the PI pyroxenite layer...the Great Dyke. THE GEOLOGY OF THE GREAT DYKE, ZIMBABWE 613 Gabbronorite PI pyroxenite Ultramafic Sequence...rock ā¢ Faults Railway Road Village Sel a Selous Mine Borehole/w. number BH FIG. 1. General locality...study area. (A) Location of the Great Dyke in Zimbabwe. (B) Subdivision of the Great Dyke into chambers |  | | Journal (article/letter/editorial) | | minerals in the Selukwe Subchamber, Great Dyke, Zimbabwe: implications for PGE collection mechanisms and...Elements (PGE) of the Selukwe Subchamber, Great Dyke, Zimbabwe. The PGE are associated with base metal sulphides...processes). K EYWORDS : Platinum Group Elements, Zimbabwe, Great Dyke, microprobe investigations, Affinity...(1989) and, in a recent detailed study of the Wedza-Mimosa deposit in the southern part of the Great Dyke...Geological setting The Great Dyke. The Great Dyke of Zimbabwe is an early Proterozoic layered intrusion of mafic |  | Barnes, Sarah-Jane, Prichard, Hazel M., Cox, Richard A., Fisher, Peter C., Godel, Belinda (2008) The location of the chalcophile and siderophile elements in platinum-group element ore deposits (a textural, microbeam and whole rock geochemical study): Implications for the formation of the deposits. Chemical Geology, 248 (3) 295-317 doi:10.1016/j.chemgeo.2007.08.004 | Journal (article/letter/editorial) | | (Busveld Complex, South Africa and Great Dyke, Zimbabwe) ā¼ 30 to 60% of the siderophile elements (except...deposits. Sulfide droplets from the Medvezky Creek Mine, Noril'sk (Barnes et al., 2006) occur in unmetamorphosed...Main Sulfide Zone (MSZ) reef of the Great Dyke, Zimbabwe, and the Merensky Reef of the Bushveld Complex...(2002). 3.1. The Great Dyke The Great Dyke of Zimbabwe is a 500 km long layered intrusion (Fig. 1) of...and Wilson, 1989). The interstitial material is augite, plagioclase, biotite, alkali feldspar, quartz |  | | Journal (article/letter/editorial) | | Main Sulfide Zone at Unki Mine, Shurugwi Subchamber of the Great Dyke, Zimbabwe: Evidence from Petrography...element (PGE) occurrence in the Great Dyke of Zimbabwe, the Main Sulfide Zone (MSZ), is a tabular stratabound...silicate composition study across the MSZ at Unki Mine in the Shurugwi Subchamber was conducted to help...the mineralization. The PGE-enriched zone at Unki Mine is a ~10 m thick package of rocks ranging from gabbronorites...of sulfide mineralization likely occurred at Unki Mine with primary sulfides occurring in association with |  | Li, Chusi, Ripley, Edward M., OberthĆ¼r, Thomas, Miller, James D., Joslin, Gregory D. (2008) Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA. Mineralium Deposita, 43 (1) 97-110 doi:10.1007/s00126-007-0159-x | Journal (article/letter/editorial) | | alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake...isotopes . Great Dyke . Sonju Lake Intrusion . Zimbabwe . USA Introduction The debate on the origin of...intruded Archean granites and greenstone belts of the Zimbabwe craton (Worst 1960; Wilson 1996; Fig. 1a). Two...(2003). They were collected from the Hartley Platinum Mine in the Darwendale subchamber (Fig. 1c). In this...cryptic variation in the composition of olivine, augite, and Miner Deposita (2008) 43:97ā110 a 99 |  | | Journal (article/letter/editorial) | | PRENDERGASTā 1 Carson Close, Greendale, Harare, Zimbabwe Abstract Geologic investigations supporting recent...that of the Main Sulfide zone of the Great Dyke (Zimbabwe) and of the Main Sulfide layer (offset portion)...thick (Fig. 2), locally containing well-developed augite oikocrysts and very minor olivine. The harzburgites...gabbro as the proportion of olivine decreases and as augite increases in modal volume and changes in textural...rocks, magnetite (Fe-Ti oxide) joins plagioclase, augite, and bronzite as a cumulus phase above another |  | | Journal (article/letter/editorial) | | dolerite, but for the rest grassy, with sparse mimosa trees. About two miles up the river is the Etanga...intrusion of the lava. The dolerite as a whole is an augite-olivine-plagioclase rock; the varieties with a...Schwarz, "Geological Survey of the Beaufort West District," Ann. Rept. Geol. Comm., x896, Cape Town (1897)...Similar ones occur in Arran consisting of selvages of augite-andesite and centers of quartz-felsite as described...Quizzyhota, cross the Kei, and traverse the Kentani district to its eastern border along the Kogha River; the |  | | Journal (article/letter/editorial) | | the presence of a band of pipe-amygdaloid in the Mimosa valley, where the ' pipes ' are arranged perpendicularly... however, which applies a t least to lavas a t Mimosa and De Vlei, there is a closer resemblance to the...plagioclase crystals containing large inclusions of augite and the ground mass. The devitrified matrix contains...numerous small labradorite crystals and crystals of augite ; the amygdales are of chlorite and an undetermined...deep red pseudomorphs after olivine, granules of augite and labradorite crystals, which are roughly of |  | | 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 solutionāit has to be implemented...Ore Group Orissa Mining Corporation Limited Run of Mine Reconnaissance Permit tonnes tonnes per annum/day...largest chromite deposits are in South Africa, Zimbabwe, Kazakhstan, Turkey, Finland, and India. 1.8 |  | | Report (issue) | | Platinum-group element mineralization of the Great Dyke, Zimbabwe. In The Geology, Geochemistry, Mineralogy and...relationships at the currently operating Lac de Iles mine (Ontario), the Marathon deposit in the Coldwell...(Ontario), and the formerly producing Salt Chuck mine (Alaska). They, thus, cover a range of deposit types...Company. The PGE mineralization in the Great Dyke (Zimbabwe), which is the worldās second largest reserve...Layered Complex (Sierra Leone) and the Great Dyke (Zimbabwe). The Papers, Third Group: Beneficiation and Metallurgy |  | | Journal (article/letter/editorial) | | oikocrysts of plagioclase, orthopyroxene, and minor augite. Fine-grained disseminated sulfides occupy intergranular...occupies intergranular positions Miner Deposita augite and plagioclase. Intercumulus clinopyroxenes are...present as inclusions in both the intercumulus augite and plagioclase. There is a marked modal variation...than the Main Sulfide Zone of the Great Dyke in Zimbabwe or Main Sulfide Layer of the Munni Munni Complex...ores and pervasively oxidized MSZ at the Hartley mine, respectively. However, we are unable to confirm |  | | Journal (article/letter/editorial) | | Prendergast Halogen geochemistry of the Great Dyke, Zimbabwe Received: 31 October 1994/Accepted: 13 June 1995...1995 Abstract Apatite from the Great Dyke of Zimbabwe is relatively rich in the hydroxy-fluorapatite...Prendergast 1 Carson Close, Greendale, Harare, Zimbabwe Editorial responsibility: T. L. Grove rich fluid...on the halogen chemistry of the Great Dyke of Zimbabwe continues a series of investigations of halogens...(bronzite) cumulate, bt biotite, PAc plagioclase-augite cumulate, PBc plagioclase-orthopyroxene (bronzite) |  | | Book | | Sill indicates that, although plagioclase/augite and augite/orthopyroxene ratios are relatively constant...of igneous differentiation. In the Great Dyke, Zimbabwe, lateral variations in minor element content in...Wilson, A.H., 1992. The geology of the Great Dyke, Zimbabwe: Crystallization, layering, and cumulate formation... A.H., 1982. The geology of the Great "Dyke", Zimbabwe: the ultramafic rocks. J. Petrology 23, 240-92...have equifbrated by diffusion creep. Great Dyke, Zimbabwe. C. Draping of plagioclase around ofvines in troctofte |  | | Book | | Karoo Basin and beyond (in Namibia, Botswana and Zimbabwe). There is also no agreement on how far the overlying...tectonic signiļ¬cance of tholeiitic basalts of the Mimosa Formation, which constitute the uppermost stratigraphic...magnetic polarity ļ¬ngerprints, indicates that the Mimosa basalts are equivalent to flows in the upper part...(white) of the Molteno Formation, at Elitheni Coal Mine (S31Ā°31ā²59.5ā³; E27Ā°16ā²14.3ā³) possible late CFB...appear to be restricted to the Azanian (Kaapvaal+Zimbabwe) and southern Congo Craton areas of the interior |  | | Book | | Redistribution in the Main Sulfide Zone of The Great Dyke, Zimbabwe T. OberthĆ¼r, F. Melcher 75-96 97-111 6. Placers...Refining the Classification Using McCreedy West Mine and Podolsky Project Case Studies 163-180 C.E.G...Sulfide Zone of the Great Dyke, Zimbabwe - Case Study of the Hartley Platinum Mine A.H. Wilson, R.T. Brown ...REDISTRIBUTION IN THE MAIN SULFIDE ZONE OF THE GREAT DYKE, ZIMBABWE T. OberthĆ¼r, F. Melcher INTRODUCTION GEOLOGICAL...REFINING THE CLASSIFICATION: USING McCREEDY WEST MINE, AND PODOLSKY PROJECT CASE STUDIES C.E.G. Farrow |  | | Journal (article/letter/editorial) | | 7 Ga the Limpopo Orogeny developed between the Zimbabwe Craton and the Kaapvaal Craton and is the oldest...April 2015 with a stop at the Vergenoeg fluorite mine followed by Karro coal Middelburg, Eastern Chrome...Zone-Critical Zone transition, Kumba Iron ore Thabazimbi mine, Andalusite Resources, Pilanesberg Alkaline Ring...important fluorite deposits in the world at Vergenoeg Mine (Fig. 4). Finally, sheets and feeder dikes of the...Rooiberg and Groenfontein. 3.1. Vergenoeg fluorite mine (Location: ~ 80 km NE of Pretoria (Fig. 4; S25Ā°15 |  | | Book | | Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Reprinted from: Minerals 2018, 8, 581, doi:10...PGM from China, Russia, South Africa, USA, and Zimbabwe are reported. In his contribution, OberthĆ¼r [3]...ite vein-disseminated ores from the Komsomolsky mine of the Talnakh and Oktyabrsk deposits, Norilāsk...bushveld complex, South Africa, and Great Dyke, Zimbabwe. Minerals 2018, 8, 581. [CrossRef] Stepanov, S...minerals in the chromitites of the Kokkinorotsos chrome mine, Cyprus. In Ophiolites, Proceedings of the International |  | | Journal (article/letter/editorial) | | of the Darwendale Subchamberof the Great Dyke, Zimbabwe ALLAN H. WILSON Departmentof Geology,Universityof...00 556 PGE,DARWENDALE SUBCHAMBER, GREAT DYKE,ZIMBABWE 557 in this deposit,and it is now recognizedas...Makwlro ā¢ sidinā¢ -200S =..... IEā¢00'S Seious mine + + -21'S 05' 50'25'E / 31*E I 30' 320E...Thesedifferencesare a PGE,DARWENDALE SUBCHAMBER, GREATDYKE,ZIMBABWE Roof zone no! preserved tions.It isalsoof ma...in the Darwendalesubchamber (Fig. 1), and the Mimosa mine in the Wedza subchamber, closedin 1972 and 1977 |  | | Journal (article/letter/editorial) | | (1997), the unmetamorphosed rocks consist of cumulus augite, olivine, orthopyroxene and magnetite, with intercumulus...minerals in the Selukwe Subchamber, Great Dyke, Zimbabwe: implications for PGE collection mechanisms and...in the Main Sulfide Zone (MSZ) at Mimosa mine, Great Dyke, Zimbabwe. 8th Int. Platinum Symp. (Rustenburg) |  | | Report (issue) | | 351and 358. LAND'S END 246.WEST GOWER 16 1 6 0 8 DISTRICT... . . . 26 2 6 247.SWANSEA ' 1 6 1 6 2 6 352...n . 1915 the work in the London and South-East district was suspended and a series of Special Reports...band may have a separate designation. I n no, district are all the shales present in workable development...recovered from mine-drainage and dump-drainage waters, especially at the Levant Mine, St. Just, and the...the Devon Great Consols Mine near Calstock. The output of -the wolfram remains steady and depends upon |  | | Report (volume) | | 351and 358. LAND'S END 246.WEST GOWER 16 1 6 0 8 DISTRICT... . . . 26 2 6 247.SWANSEA ' 1 6 1 6 2 6 352...n . 1915 the work in the London and South-East district was suspended and a series of Special Reports...band may have a separate designation. I n no, district are all the shales present in workable development...recovered from mine-drainage and dump-drainage waters, especially at the Levant Mine, St. Just, and the...the Devon Great Consols Mine near Calstock. The output of -the wolfram remains steady and depends upon |  | | Report (issue) | | California, U.S.A. (Switzer and Bailey, 1953); Mihara mine, Okayama Prefecture and at Fuka, Okayama Prefecture...kimberlite pipe, Farm Dorst Fontein K 77, Kimberley district, Northern Cape Province (Parry and Wright, 1925)...mineralised pocket in the Wessels mine, Farm Wessels 227, Hotazel district, Northern Cape Province (Von Bezing...kilometres southwest of Cnydas West, Gordonia district, Northern Cape Province and from Karelia, Russia...Norite-Anorthosite) of the Atok Mine, Farm Middelpunt 420 KS, Zeekoegat district, Northern Province (Mihalik |
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