 | | Journal (issue) | | Geological Society of Zimbabwe G Z S June 2015 Newsletter No. 2 of 3 of 2015 Fun was had by all...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare Geological Society of Zimbabwe Newsletter ...Nickeliferous Archean Madziwa Igneous Complex, Northern Zimbabwe: Petrological Evolution, Magmatic Architecture...Society of Zimbabwe Annual Symposium 28/11/2014, Geology Department, University of Zimbabwe – Summaries...Ben Mapani ……….. The History of Mica Mining in Zimbabwe – Tim Broderick ………………….. Citation for the A.E |  | | Journal (article/letter/editorial) | | purposely lacking, as all information on regional and mine geology, host rock and ore sample descriptions,...Brazil [10–13]: Ajjanahalli, India [14,15]; Renco, Zimbabwe [16–20]; Hutti [21–27], Hira Buddini [28,29]...and Lega Dembi are situated in greenstone belts, Renco formed in a granulite facies mobile belt, Pilgrim’s...Geologic Settings New Consort Cuiabá Ajjannahalli Renco Hutti Hira Buddini Pilgrim’s Rest Lega Dembi Navachab...metasedimentary rocks and banded iron formation. Renco is an example of an unusual setting in that it is |  | | Journal (article/letter/editorial) | | auriferous sulphide-bearing ('lode') schists with muscovite and K-feldspar, and surrounding biotite schists...complex metamorphic assemblages occurs around the mine, compared to the assemblages developed regionally;...no evidence of higher metamorphic grades at the mine, nor that this might have been the prime control...lOOt Au), the Renco mine in the Rhodesian Craton of Zimbabwe (c. 30t Au), and the Consort mine in South Africa...contained gold. The ore-bearing horizon is a muscovite and/ or K-feldspar schist (i.e. the lode schist) |  | Smit, C.A., Van Reenen, D.D., McCourt, S., Huizenga, J.M., Belyanin, G., Vafeas, N.A. (2019) Hypozonal orogenic gold mineralization in the Giyani Goldfield, Northern Kaapvaal Craton/Limpopo Complex. South African Journal of Geology, 122 (4) 455-488 doi:10.25131/sajg.122.0037 | Journal (article/letter/editorial) | | New Consort in the Barberton greenstone belt and Renco in the Northern Marginal Zone (NMZ) of the Limpopo...that of Renco gold mine in the granulite facies terrane of the NMZ of the LC in Zimbabwe. The Renco deposit...against medium-grade granite-greenstone belts of the Zimbabwe Carton (ZC) to the north (Figure 5) (e.g., Kolb...2000, 2015; Blenkinsop, 2011). The ore deposit at Renco was formed at a minimum temperature of 600°C and...trending Birthday section hosts the Birthday gold mine as well as several gold prospects such as Boltman’s |  | Kirkland, C.L., Spaggiari, C.V., Smithies, R.H., Wingate, M.T.D., Belousova, E.A., Gréau, Y., Sweetapple, M.T., Watkins, R., Tessalina, S., Creaser, R. (2015) The affinity of Archean crust on the Yilgarn—Albany–Fraser Orogen boundary: Implications for gold mineralisation in the Tropicana Zone. Precambrian Research, 266. 260-281 doi:10.1016/j.precamres.2015.05.023 | Journal (article/letter/editorial) | | 50% quartz, 40% plagioclase, 8% K-feldspar, 1% muscovite, and 380 accessory zircon, epidote, and apatite...matrix consists of quartz, biotite, chlorite, muscovite, rutile, pyrite, ilmenite, zircon, 398 and monazite...consists of about 60–70% quartz, 15% phengitic muscovite, 5% biotite, 5% chlorite, 424 and 5% dolomite...sector zoning, or are 455 456 457 458 including muscovite, chlorite, biotite, amphibole (gedrite), Fe-oxide...interpreted as a granitic gneiss overprinted by muscovite and chlorite alteration. Gold occurs as subhedral |  | Doyle, M. G., Fletcher, I. R., Foster, J., Large, R. R., Mathur, R., McNaughton, N. J., Meffre, S., Muhling, J. R., Phillips, D., Rasmussen, B. (2015) Geochronological Constraints on the Tropicana Gold Deposit and Albany-Fraser Orogen, Western Australia. Economic Geology, 110 (2) 355-386 doi:10.2113/econgeo.110.2.355 | Journal (article/letter/editorial) | | Australia Abstract Gold mineralization at the Tropicana mine occurs within the Plumridge terrane along the eastern...the Dharwar craton, India, and the Limpopo belt, Zimbabwe, economic gold mineralization at Tropicana postdates...studied examples include Hemlo in Canada, Renco in Zimbabwe, Hutti in India, Challenger in South Australia...been used in support of a retrograde timing of the Renco deposit (e.g., Blenkinsop and Frei, 1996; Kisters...Kalgoorlie Kurnalpi Terrane Ea Kanowna Belle Mine 120° Gu nb ar re lF YILGARN CRATON 30° 1000 |  | | Journal (article/letter/editorial) | | limits for alteration chlorite at the Harbour Lights mine, Yilgarn Block (Skwarnecki 1988). The ticked line...chlorite; Dol = dolomite; Mgs=magnesite; Ms = muscovite; Qtz = quartz; T/c = talc granulite facies ores...n i v a r i a n t reactions for the Victory gold mine are: 1. Ms+Dol=Bt+Chl+Cal; 2. B t + C h l + D o...giving biotite-ankerite - alteration at the Hunt mine, Kambalda as between 5.8 to 6.8; virtually identical...precipitation (e.g. pyrite-only deposits, Morning Star Mine: Henderson 1981) or contain mineralogical and/or |  | Neumaryr, P., Groves, D. I., Ridley, J. R., Koning, C. D. (1993) Syn-amphibolite facies archaean lode gold mineralisation in the Mt. York District, Pilbara Block, Western Australia. Mineralium Deposita, 28 (6) 457-468 doi:10.1007/bf02431602 | Journal (article/letter/editorial) | | Archaean lode gold mineralisation in the Mt. York District, Pilbara Block, Western Australia P. Neumayr ~...The Archaean lode gold deposits in the Mt. York District, Pilbara Block, Western Australia are hosted in...Kalgoorlie at higher crustal levels. The Mt. York District is located in the Archaean Pilgangoora greenstone...Hill/Breccia Hill and Zakanaka prospects in this district. Gold was first discovered in the Pilbara Craton...1990), Western Australia, and location of Mt. York District recent production from a few relatively small |  | | Journal (article/letter/editorial) | | type. Other deposits around the world, such as Renco and Griffins Find, are hosted in granulite facies...garnet; Ksp, K-feldspar; Lo, löllingite; Musc, muscovite; Opx, orthopyroxine; Pl, plagioclase; Po, pyrrhotite;...vapor-absent dehydration reactions involving muscovite and biotite with sillimanite can Bt + Als + Pl...studied granulitehosted gold deposits are Renco, in Zimbabwe (Bohmke and Varndell, 1986; Tabeart, 1987;...Metabasalts and metasediments Au, Po, Lo, Asp 1, 2, 3 Renco 825-850°C, 5-8.4 kbar Prepeak(4)/ Postpeak(5,6 |  | | Journal (article/letter/editorial) | | by Na>K>>Mg and Ca, although precipitation of muscovite or K-feldspar from such a fluid will be NU favored...hydrothermal clays may exist along with sericite/muscovite as important silicate alteration phases, minor...carbonaceous host rocks, such as in the Loulo district in Mali (Lawrence et al., 2013), may also lead...Nitrogen isotopes measured from hydrothermal muscovite, biotite, and K-feldspar of NU orogenic gold...deposits from the Yilgarn, Superior, Dharwar, and Zimbabwe cratons have values between about 10-24 per mil |  | | Journal (article/letter/editorial) | | that significantly postdate metamorphism (e.g., Renco, Blenkinsop and Frei, 1996; Tropicana, A. Tomkins...lesser ankerite, growth of Fe-rich chlorite and muscovite, and, typically, pervasive silicification (White...silicification, albitization, and muscovite growth, respectively. New muscovite also accounts for the measured...dusting in feldspar grains, and growth of calcite, muscovite, and quartz. (A) and (C) in plane-polarized light...qualitatively higher than conditions inferred at the Tarkwa mine, approximately 30 km southwest of Damang (Fig. 1A) |  | | Journal (article/letter/editorial) | | at low pressures and high temperatures where muscovite can break down without causing melting; conditions...generally consumed by 550–600 °C (at 0.5 GPa), and muscovite, which breaks down in the interval 650–700 °C...events triggered by breakdown of chlorite and muscovite in successive continuous and discontinuous reactions...and then at low pressure, to the breakdown of muscovite. Note that the H2O production rate (XH2O/DT) accelerates...metamorphic H2O generated through chlorite and muscovite breakdown. At this stage of the analysis the system |  | | Corporate Document | | SOUTH AFRICA 10.1 Western Deeps 10.2 Fairwiew 10.3 Renco 11. CANADA 11.1 Wawa AUSTRALIA 12 Ultramafic host...assemblage: quartz - K feldspar - biotite - albite - muscovite - calcite(?) pyrrhotite + possibly arsenopyrite...assemblage due to alteration: quartz - albite - muscovite - biotite - K feldspar - tourmaline - rutile -...ore" was extracted and treated at the Pahtavaara mine plant (Markku Kilpelä, pers. comm. 1999). The deposit...pyrrhotite. LEV-5 Carbonate - quartz - albite - muscovite - pyrrhotite (partly haematitised) -chalcopyrite |  | | Book | | USSR Academy of Sciences, Chernogolvka, Moscow district, U . S . S . H . J. Foden, Bureau of Mineral Resources...Rhodesia, Box M.P. 167, Mount Pleasant, Harare, Zimbabwe. R.W. Ojakangas, Department of Geology, University...O. B o x . MP. 1 6 1 , Mount Pleasant, Harare, Zimbabwe. B.F. Windley, Department of Geology, University...MINERALISATION IN THE EARLY PRECAMBRIAN CRUST OF ZIMBABWE J.F. Wilson and T.H.C. Nutt 555 MINERAL OCCURRENCES...631 LITHIUM PEGMATITES OF AMARESHWAR, RAICHUR DISTRICT, KARNATAKA, INDIA T.C. Devaraju, N. Rajshekhar |  | | Journal (article/letter/editorial) | | vein-quartz gold deposit, Ipitinga Auriferous District, SE-Guiana Shield, Brazil: Implications for orogenic...gold deposit, located in the Ipitinga Auriferous District, south-eastern portion of the Guiana Shield, northern... which is composed of muscovite and tourmaline; sulphides are rare. Muscovite and tourmaline, in addition...differs from the other gold showings in the same district, which are characterized by abundant aqueous-carbonic...orogenic gold showings in the Ipitinga Auriferous District (Fig. 1; Klein and RosaCosta, 2003; Klein et al |  | Zhao, Hesen, Wang, Qingfei, Groves, David I., Deng, Jun (2019) A rare Phanerozoic amphibolite-hosted gold deposit at Danba, Yangtze Craton, China: significance to fluid and metal sources for orogenic gold systems. Mineralium Deposita, 54 (1) 133-152 doi:10.1007/s00126-018-0845-x | Journal (article/letter/editorial) | | large granite intrusion is more than 10 km from the mine (ESM Fig. 1). The ore bodies had been mined to a...magnetotelluric sounding used during exploration at the mine (Fan et al. 2013). Metamorphic petrography Metamorphic...and ubiquitously associated with retrogressive muscovite that has replaced the biotite along its contacts...depth of 300 to 600 m in different sectors of the mine. Exploration data show that the Major Lode has a...with ore-related wall rock alteration, in the Danba mine were calculated using three methods: 1) amphibole-plagioclase |  | | Journal (article/letter/editorial) | | Kalgoorlie (Fig. 1). Discovered in 2005, Tropicana gold mine is jointly owned by AngloGold Ashanti Limited (70%)...west terrane Coastline Prospect / project N Gold mine (> 5 Moz) Town Fig. 1. Pre-Neoproterozoic basement...Visible free gold is uncommon and restricted to muscovite-lined veinlets and fractures which transect the...prograde hornblende crystals, and small patches of muscovite and blue tourmaline are occasionally present....gneissic package and crop out 4 km northeast of the mine. Importantly, the paucity of quartz veining throughout |  | Bineli Betsi, Thierry, Mokane, Lebogang, McFarlane, Chris, Phili, Kelebogile, Kelepile, Tebogo (2020) Multistage gold mineralization events in the Archean Tati greenstone Belt, northeast Botswana: Constraints from integrative white mica Ar/Ar, garnet U-Pb and sulfides Pb/Pb geochronology. Precambrian Research, 339. 105623 doi:10.1016/j.precamres.2020.105623 | Journal (article/letter/editorial) | | northeastern Botswana and 60 in the southwestern of the Zimbabwe Craton (Fig.1) is host to numerous types of ore...TGB, is located in the southwestern edge of the Zimbabwe Craton, 111 which extends in a southwestern...Botswana (Fig.1A, Zhai et al., 2006). The 112 Zimbabwe Craton is separated from the Kaapvaal Craton by...2002; Kampunzu et al., 2003). The part of the Zimbabwe Craton exposed in 116 Botswana is further subdivided...gneisses (Bagai et 145 al., 2002) and Phoenix Mine Gabbro (Van Geffen, 2004), the TTG from the TGB |  | Neyedley, Kevin, Hanley, Jacob J., Fayek, Mostafa, Kontak, Daniel J. (2017) Textural, Fluid Inclusion, and Stable Oxygen Isotope Constraints on Vein Formation and Gold Precipitation at the 007 Deposit, Rice Lake Greenstone Belt, Bissett, Manitoba, Canada. Economic Geology, 112 (3) 629-660 doi:10.2113/econgeo.112.3.629 | Journal (article/letter/editorial) | | greenstone belt, Canada, Smith et al., 1984; Sigma mine, Abitibi greenstone belt, Canada, Robert and Kelly...0361-0128/17/4483/629-32 mining district, United States, Caddey et al., 1991; Rice Lake mine, Rice Lake greenstone...gold belt, Ghana, Oberthür et al., 1996; Siscoe mine, Abitibi greenstone belt, Canada, Olivo and Williams-Jones...greenstone belt, Canada, Dubé et al., 2004; Giant mine, Yellowknife greenstone belt, Canada, Shelton et...craton, Australia, Duuring et al., 2004; Hoyle Pond mine, Abitibi greenstone belt, Canada, Dinel et al., |  | | Journal (article/letter/editorial) | | in a potential world-class gold deposit: El-Sid mine, Egypt—Hassan Helmy and Basem Zoheir The mineralization...granitoids in the newly discovered Zha-Shan porphyry Cu district, South Qinling, central China, and implications...genetic concept based on a review of the New Consort, Renco, Hutti, Hira Buddini, Navachab, Nevoria and The...ages of hydrothermal muscovite and igneous biotite at the Guposhan-Huashan district, northeast Guangxi |  | Hagemann, Steffan G., Brown, Philip E., Ridley, John, Stern, Peter, Fournelle, John (1998) Ore petrology, chemistry, and timing of electrum in the Archean hypozonal Transvaal lode gold deposit, Western Australia. Economic Geology, 93 (3) 271-291 doi:10.2113/gsecongeo.93.3.271 | Journal (article/letter/editorial) | | pelitiemetasedimentary rocks, a proximal biotite-muscovite-quartz-graphite zonegrades outward intoa distal...postmetamorphic silicateandsulfideminerals suchasehlorite,muscovite, pyrite,andcubanitc areevidence forprocesses thatoccurred...northwest-striking andsteeplysouthwestand Lake mine, Marmont, 1986; Renco, Tabcart, 1987; Hemlo, northeast-dipping...tainedbyDalstra(1995)andusedin thisstudy. chlorite, and_ muscovite (Dalstra et al.,in press). Microtexturesindicatethatthe.......... •r.USCovite (.R) ....... Biotite muscovite (R) • Zircon CARBONATES OXIDES I ........ |  | | Journal (article/letter/editorial) | | accompanied by carbonation, sulphidation and muscovite ⁄ biotite alteration where the host rock is of...1–2 km by 1–2 km by 1–20 m Barton Deeps at Jundee mine Deposit Ore shoot Several geographically related...near-constant in many gold systems. For example, at Hunt mine in the Kambalda–St Ives goldfield, an alteration...deposition retrograde (Fig. 11, middle; e.g. Hunt mine, Kambalda–St Ives). In deeper–later metamorphism...GOLD DEPOSITS 705 gold provinces (e.g. Victoria, Zimbabwe, Yilgarn craton), another consequence may be the |  | | Journal (article/letter/editorial) | | ARTICLE Two stages of gold mineralization at Hutti mine, India A. J. Rogers & J. Kolb & F. M. Meyer & T...# Springer-Verlag 2012 Abstract The Hutti gold mine is located in a high-angle, NNW–SSE-trending shear...fluid pulse, which gave the Hutti mine its status as the largest gold mine in India. The metamorphic evolution...assemblages from the ore bodies of the Hutti gold mine in order to classify and distinguish the fluid fluxes...Hutti-Maski greenstone belt hosting the Hutti gold mine lies in the eastern block of the Dharwar Craton |  | Wulff, K., Dziggel, A., Kolb, J., Vennemann, T., Bottcher, M. E., Meyer, F. M. (2010) Origin of Mineralizing Fluids of the Sediment-Hosted Navachab Gold Mine, Namibia: Constraints from Stable (O, H, C, S) Isotopes. Economic Geology, 105 (2) 285-302 doi:10.2113/gsecongeo.105.2.285 | Journal (article/letter/editorial) | | Mineralizing Fluids of the Sediment-Hosted Navachab Gold Mine, Namibia: Constraints from Stable (O, H, C, S) Isotopes...D-18119 Rostock, Germany Abstract The Navachab gold mine in the Damara belt of central Namibia is characterized...apparent geothermal gradients (ca. 80°C/km−1) in the mine area. Introduction THE NAVACHAB gold deposit is... ca. 120 km northwest of Windhoek (Fig. 1). The mine belongs to a small group of known economic gold...Badenhorst, 2002; Steven, pers. commun., 2008). The mine is run as an open-pit operation, with an average |  | | Journal (article/letter/editorial) | | different directions. Gold mineralisation at the Betam mine area, south Eastern Desert, is related to a series...magmatic and metamorphic) fluids. Keywords: Betam gold mine, Eastern Desert of Egypt, Hydrothermal alteration...CO2, H2O, K and lesser Na. In the Barramyia gold mine, where numerous auriferous quartz veins cut through...enveloping the gold-bearing quartz veins at Hutit mine, in the southern Eastern Desert, grades up to 35...the main mineralised quartz vein at the Um Tenedba mine, replacing the original granitic/gabbroic material |
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