 | Oberthur, T., Weiser, T. W., Gast, L., Schoenberg, R., Davis, D. W. (2002) PLATINUM-GROUP MINERALS AND OTHER DETRITAL COMPONENTS IN THE KAROO-AGE SOMABULA GRAVELS, GWERU, ZIMBABWE. The Canadian Mineralogist, 40 (2) 435-456 doi:10.2113/gscanmin.40.2.435 | Journal (article/letter/editorial) | | (2002) PLATINUM-GROUP MINERALS AND OTHER DETRITAL COMPONENTS IN THE KAROO-AGE SOMABULA GRAVELS, GWERU, ZIMBABWE...the Somabula gravels, a paleoplacer of Upper Karoo (Triassic, ~200 Ma) age near Gweru, Zimbabwe. The...The polymict spectrum of heavy minerals in the Somabula placers comprises staurolite, zircon, monazite,...columbite–tantalite, cassiterite, chromite, native gold, platinum-group minerals (PGM), and other components, which...originating from the Great Dyke and from the primary platinum-group element mineralization of the Main Sulfide |  | | Journal (issue) | | Geological Society of Zimbabwe G Z S Newsletter October 2015 No. 3 of 3 of 2015 Heavy mineral concentrate...concentrate (Total weight 4.974g) from the Somabula alluvial deposit. One diamond crystal (octahedron/dodecahedron)...alexandrite, sapphires, garnet, amethyst, topaz (“Somabula blue” and white), aquamarine, boart and native...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare Geological Society of Zimbabwe Newsletter ... ARTICLES AND REPORTS A Review of Diamonds in Zimbabwe – a Century On .............................. |  | | Journal (article/letter/editorial) | | ancestry for the Somabula diamond-bearing alluvial deposit, Central Zimbabwe Andy Moore Somabula Explorations...Explorations (Pvt) Limited, Box CH399, Chisipite, Harare, Zimbabwe. e-mail: andy.moore@info.bw John Moore Geology...conglomerates, located to the southwest of Gweru in central Zimbabwe, have long presented an enigma in terms...Although conglomerate units occur throughout the Somabula Karoo succession, the diamonds and associated...20 km to the southwest of Gweru, in the Somabula district in central Zimbabwe (Figures 1 and 2). The diamonds |  | | Journal (issue) | | Geological Society of Zimbabwe Newsletter June, 2007 Geological Society of Zimbabwe Newsletter June 2007...SOCIETY OF ZIMBABWE, P.O. BOX CY 1719, CAUSEWAY, HARARE Geological Society of Zimbabwe Newsletter ...Department, University of Zimbabwe ………………………………………. 22 The Geological Survey of Zimbabwe …………………………………………………...…………………………………………………… …. 31 2 Geological Society of Zimbabwe Newsletter June, 2007 Editorial At last we have...collective predicament as geologists and miners in Zimbabwe, 2007. Let us take note and work towards solving |  | | Journal (issue) | | Geological Society of Zimbabwe G Z S Newsletter February 2016 No. 1 of 3 of 2016 Faceted round brilliant...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare Geological Society of Zimbabwe Newsletter ... ARTICLES AND REPORTS A Review of Diamonds in Zimbabwe – a Century On. Part 2. ........................ 6 16 NEWS Geology Department, University of Zimbabwe – Maideyi Meck …………… The Professor Tom Blenkinsop... 2 Geological Society of Zimbabwe Newsletter February, 2016 Editorial Another |  | | Journal (article/letter/editorial) | | XXX, no. X, pp. XX–XX SCIENTIFIC COMMUNICATIONS PLATINUM-BEARING PLACERS: MINERAL ASSOCIATIONS AND THEIR...Chiney, and Guli) but there are also abundant platinum-group mineral (PGM) placers of large areal extent...gold would remain more proximal to their sources. Platinum-iron alloys and sperrylite (PtAs2) are very durable...intraplate magmatic events (including Alluvial platinum group minerals (PGMs) Alluvial PGMs are present...placers are ferroan platinum (Pt-Fe disordered alloy with 20–50 mol % Fe) native platinum (alloy with ≥80 |  | | Journal (article/letter/editorial) | | common but usually a minor by-product in PGE (platinum-element group) mining of magmatic PGE deposits...and Os–Ir alloys and a range of secondary PGM (platinum-group minerals) plus gold (Shcheka et al., 2004a)...silver content (up to 8 wt.% of Ag; Table 1). The platinum content up to 8 wt.% (Table 1) is probably mainly...the difference in electrochemical potential of platinum and gold, which is 1.2 V for the Pt=Pt2þ standard...(2001) On types of gold and platinum sources from the Fadeevka ore district, Primorye. Genesis mestorozhdeniy |  | Oberthur, T., Melcher, F., Gast, L., Wohrl, C., Lodziak, J. (2004) DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE EASTERN BUSHVELD COMPLEX, SOUTH AFRICA. The Canadian Mineralogist, 42 (2) 563-582 doi:10.2113/gscanmin.42.2.563 | Journal (article/letter/editorial) | | Mineralogist Vol. 42, pp. 563-582 (2004) DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE EASTERN...the eastern Bushveld, more than 6000 grains of platinum-group minerals (PGM) were recovered from alluvial...number of well-known and also exotic PGM. Keywords: platinum-group minerals, placer, Maandagshoek, eastern... INTRODUCTION The initial major discovery of platinum in the Bushveld Complex, which subsequently led...Bushveld Complex that produced unknown amounts of platinum. However, as mining commenced on the rich pipes |  | | Journal (issue) | | Geological Society of Zimbabwe Newsletter June, 2011 Geological Society of Zimbabwe 1960 -2010 G S Z...Newsletter June 2011 Tectonic evolution of the Zimbabwe Craton in the early Palaeoproterozoic. (a) Following...Following Söderlund et al. (2010), the Zimbabwe craton is positioned along the eastern margin of the Superior...basin initiated. (c) Assembly of the Kaapvaal and Zimbabwe cratons, and unknown terrane, Terra Incognita...Incognita at ca. 2.0 Ga led to tectonic escape of the Zimbabwe Craton and dextral shearing in the Limpopo Belt |  | | Journal (article/letter/editorial) | | The Somabula Forest Diamond Field Southern Rhodesia M. C. B The Somabula Forest diamond placers are...workings. The oldest mine of importance in the Somabula area is the Shamrock Gold Mine to the north of...for gold led to the discovery of diamonds on the Somabula Spruit in 1Ç)03 by H. R. Moir and his brother...other minerals associated with the diamonds at Somabula might be expected. PRODUCTION Value £27,843 3...331 2,991 2,230 3,083 1,917 GENERAL GEOLOGY The Somabula Forest and the surrounding country is underlain |  | | Journal (article/letter/editorial) | | mining for gold in the valleys of the J_ Cariboo district of British Columbia has led to a careful investigation...other barriers of Glacial age. VII.—PLATINUM METALS IN THE SOMABULA DIAHONDIFEROTJS GBAVELSBr H. B. MAUFE...Geological Survey- Short Report No. 5, 1319. HE Somabula Diamondiferous Gravels which contain the diamond...possibility that the rocks might contain platinum or metals of the platinum group (iridium, osmium, palladium...writing of the occurrence of platinum in Southern Rhodesia, said: "The Somabula gravel for instance is a |  | | Journal (article/letter/editorial) | | mining for gold in the valleys of the J_ Cariboo district of British Columbia has led to a careful investigation...other barriers of Glacial age. VII.—PLATINUM METALS IN THE SOMABULA DIAHONDIFEROTJS GBAVELSBr H. B. MAUFE...Geological Survey- Short Report No. 5, 1319. HE Somabula Diamondiferous Gravels which contain the diamond...possibility that the rocks might contain platinum or metals of the platinum group (iridium, osmium, palladium...writing of the occurrence of platinum in Southern Rhodesia, said: "The Somabula gravel for instance is a |  | | 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 …………………..……..………….... 9 Karoo Large Igneous Province, Botswana-Zimbabwe .........……………………….. Geology Department, University of Zimbabwe …………………………………….. Geological Survey Department...Committee, on behalf of the Geological Society of Zimbabwe, would like to offer a sincere vote of thanks |  | | Journal (article/letter/editorial) | | mining for gold in the valleys of the J_ Cariboo district of British Columbia has led to a careful investigation...other barriers of Glacial age. VII.—PLATINUM METALS IN THE SOMABULA DIAHONDIFEROTJS GBAVELSBr H. B. MAUFE...Geological Survey- Short Report No. 5, 1319. HE Somabula Diamondiferous Gravels which contain the diamond...possibility that the rocks might contain platinum or metals of the platinum group (iridium, osmium, palladium...writing of the occurrence of platinum in Southern Rhodesia, said: "The Somabula gravel for instance is a |  | | Journal (article/letter/editorial) | | of alloy minerals, 2–5 mm in size, rich in the platinum-group elements (PGE), from a unique, very old...occur as Pt3Fetype (isoferroplatinum or Fe-rich platinum) and Pt2Fe-type inclusions (<50 µm), enclosed...Fe-rich platinum, possibly reflecting a lower limit of Pt content possible in the mineral platinum. An Au-Ag...Barkov et al. 2006). This association between the platinum-group elements (PGE) and W-Mo, which differ in...2) corresponds to isoferroplatinum or Fe-rich platinum. No structural data could be obtained for the |  | | Journal (article/letter/editorial) | | Arrhenius equation as a controlling factor of platinum-group mineral formation Athinoula L. Petrou a...complexes and Ural/Alaskan-type intrusions the platinum-group element minerals (PGM) occur as laurite...unclear. Literature data on grain size (r) of platinum-group minerals (PGM) and their formation temperature...activation energy for the formation of IPGM (Ir–platinum-group minerals) was estimated, for the first time...Ltd. All rights reserved. 1. INTRODUCTION The platinum-group elements (Ru, Rh, Pd, Os, Ir, and Pt), which |  | Oberthur, T., Weiser, T. W., Melcher, F., Gast, L., Wohrl, C. (2013) DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE GREAT DYKE, ZIMBABWE. The Canadian Mineralogist, 51 (2) 197-222 doi:10.3749/canmin.51.2.197 | Journal (article/letter/editorial) | | 2.197 DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE GREAT DYKE, ZIMBABWE Thomas OBERTHÜR§...the description of the assemblage of detrital platinum-group minerals (PGM) found in rivers draining...and PGE-oxides (unstable). Keywords: Great Dyke, Zimbabwe, alluvial sediments, Pt-Fe alloy, Os-Ir-Ru alloy...Bushveld Complex of South Africa, the Sudbury district in Canada, and later Norilsk in Russia came into...Weiser 2002). Notably, the discovery of detrital platinum-group minerals (PGM) in gravels on the Maandagshoek |  | Barkov, A. Y., Martin, R. F., LeBarge, W., Fedortchouk, Y. (2008) Grains of Pt-Fe alloy and inclusions in a Pt-Fe alloy from Florence Creek, Yukon, Canada: evidence of mobility of Os in a Na-H2O-Cl-rich fluid. The Canadian Mineralogist, 46 (2) 343-360 doi:10.3749/canmin.46.2.343 | Journal (article/letter/editorial) | | recovered in Florence Creek. Keywords: platinum-group elements, platinum-group minerals, Pt–Fe alloy, PGE alloys...We discuss textures and compositions of these platinum-group minerals (PGM); our results amplify those...phase with 24–25 at.% Fe + Cu + Ni is Fe-rich platinum, not isofer- roplatinum, as was proposed earlier...the sample location for placer occurrences of platinum-group minerals in Florence Creek, Arch Creek,...Relationship of “Pt2Fe” with Pt3Fe and Fe-bearing Platinum Isoferroplatinum is close to being stoichiometric |  | | Journal (article/letter/editorial) | | mineralogy, geochemistry and genesis of the alluvial platinum-group minerals of the Freetown Layered Complex...Peninsula, Sierra Leone have been examined for their platinum-group mineral (PGM) content. The alluvial PGM...E-mail: john.bowles@manchester.ac.uk Keywords: Platinum-group minerals • Freetown Intrusion, Sierra Leone...Evidence from the rivers draining The Great Dyke in Zimbabwe (Oberthür et al., 2013) provides a view of the...assess the origin of the secondary PGM. Pr ep Platinum from the Freetown Peninsula In 1926 Pt-bearing |  | | Journal (issue) | | Geological Society of Zimbabwe Newsletter June, 2010 Geological Society of Zimbabwe G Z S Newsletter...SOCIETY OF ZIMBABWE, P.O. BOX CY 1719, CAUSEWAY, HARARE Geological Society of Zimbabwe Newsletter ...for 2009 ……………………………………… Landscape Evolution in Zimbabwe from the Permian to present, with implications...……………….. 16 Geology Department, University of Zimbabwe ……………………………………… 16 Geological Survey Department...………………………………………………… 25 2 Geological Society of Zimbabwe Newsletter June, 2010 Editorial As we present |  | Barkov, A. Y., Martin, R. F., Fleet, M. E., Nixon, G. T., Levson, V. M. (2008) New data on associations of platinum-group minerals in placer deposits of British Columbia, Canada. Mineralogy and Petrology, 92 (1) 9-29 doi:10.1007/s00710-007-0192-6 | Journal (article/letter/editorial) | | in The Netherlands New data on associations of platinum-group minerals in placer deposits of British Columbia...principally comprise Pt-Fe-(Cu) alloy minerals: Fe-rich platinum [PGE:(Fe þ Cu þ Ni) ¼ 3.6–7.6], Pt3Fe-type alloy...alloy (isoferroplatinum or Fe-rich platinum), subordinate ‘‘Pt2Fe’’-type alloy (probably, a compositional...compositional variant of Fe-rich platinum) and the tulameenite-tetraferroplatinum series. Less-abundant are iridium...Introduction Placer deposits of gold and minerals of platinum-group elements (PGE) were first discovered in |  | | Journal (issue) | | Geological Society of Zimbabwe Newsletter February, 2012 Geological Society of Zimbabwe G Z S Newsletter...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare 1 Geological Society of Zimbabwe Newsletter...Central Zimbabwe Watershed .....……… Integrated Exploration on Coal Project in southern Zimbabwe ………………...practice in Zimbabwe ………………………………… 10 10 12 12 13 13 NEWS Geology Department, University of Zimbabwe …………………………………...Committee, on behalf of the Geological Society of Zimbabwe, would like to offer a sincere vote of thanks |  | | Journal (article/letter/editorial) | | Dutrizac, and J.L. Jambor Magmatic and hydrothermal platinum-group minerals and base-metal sulfides in the...R.K.W. Merkle, and H.-J. Bernhardt Botryoidal platinum, palladium and potarite from the Bom Sucesso Stream... Garuti, E.V. Pushkarev, and F. Zaccarini The platinum-group minerals in the upper section of the Keivitsansarvi...Nickel Platinum-group minerals and other detrital components in the Karoo-age Somabula gravels, Gweru, Zimbabwe—T...-H. Klaska, and E.F. Stumpfl Composition of the platinum-group minerals in the Salmon River placer deposit |  | | Journal (article/letter/editorial) | | Canadian Mineralogist Vol. 43, pp. 1687-1710 (2005) PLATINUM-GROUP MINERALS FROM FIVE PLACER DEPOSITS IN BRITISH...Canada ABSTRACT Platinum-group minerals (PGM) from a selected suite of gold- and platinum-group-element...alloys: “Pt3Fe”-type alloys [Fe-rich platinum (formerly, ferroan platinum: Bayliss et al. 2005) or isoferroplatinum]...transport from their source. Keywords: platinum-group elements, platinum-group minerals, Pt–Fe alloys, Pt–Fe–Cu...Colombie-Britannique, Canada. INTRODUCTION Gold- and “platinum”-bearing placer deposits have been worked in British |  | | 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...from the southern part of the craton up into the Midlands area and is everywhere overlain by a thick pile...at the Cotopaxi and Dickens mines in Victoria District in 1894, but it was not until the early l 900's...LARGE GOLD MINES Mine Geology and mineralization District Cam and Motor Gatooma Globe & Phoenix Que |
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