 | | Journal (article/letter/editorial) | | 577 Single zircon ages for two Archean banded migmatitic gneisses from central Zimbabwe Hielke Jelsma...single zircon ages for two Archean banded gneisses from the Shangani Batholith in central Zimbabwe. The...intrusions within the south-central part of the Zimbabwe Craton and are associated with contemporaneous... Introduction The Zimbabwe Craton in southern Africa underlies most of Zimbabwe as well as parts of...Blenkinsop et al., 1997). The oldest rocks of the Zimbabwe Craton are tonalitic to trondhjemitic (TTG) gneisses |  | 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) | | DETRITAL COMPONENTS IN THE KAROO-AGE SOMABULA GRAVELS, GWERU, ZIMBABWE THOMAS OBERTHÜR§ Bundesanstalt für...the Somabula gravels, a paleoplacer of Upper Karoo (Triassic, ~200 Ma) age near Gweru, Zimbabwe. The...spectrum of heavy minerals in the Somabula placers comprises staurolite, zircon, monazite, columbite–tantalite...determinations revealed that most of the detrital grains of zircon, monazite and columbite–tantalite originate from...late Archean greenstone belts of the Zimbabwe craton. Keywords: zircon, monazite, tantalite, U–Pb dating |  | | 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 (article/letter/editorial) | | BRODERICK .\W^ D. PI.OWES 65 Landscape evolution in Zimbabwe from the Permian to present, with implications...Grahanistown. Somabula Explorations (Pvt.) Limited, Box CH399. Chisipite. Harare. Zimbabwe. e-mail: andy...Broderick 19 Jenkinson Road, Chisipite, Harare. Zimbabwe e-mail: makari@zol.co.zw D. Plowes 49 Arcadia...is presented to model drainage evolution -Acmss Zimbabwe since ihe Fenniiin. TÍii.s provides the framework...to the nortii and south oí' the modern central Zimbabwe watershed, wliich separates the Zambezi and Limpopo |  | | Journal (article/letter/editorial) | | U-Pb 125±2 Baddeleyite, zircon from dunite1 (Ronkin et al., 2013) « 127±1 Zircon from dunites, clinopyroxenites...gabbro (Elliot and Martin, 1991; Webb, 2014) 265–241 Zircon, baddelyite from orebodies and basalts (Campbell...(postmagmatic zircon) Petrov et al., 2010) 1The data obtained by U-Pb dating of zircon from dunites...is questionable, as it is widely believed that zircon cannot crystallize in ultramafic magma (Heaman...(Borisov and Aranovich, 2019); more likely the zircon grains were trapped (Bea et al., 2001) or crystallized |  | Taylor, P.N., Kramersb, J.D., Moorbatha, S., Wilson, J.F., Orpen, J.L., Martin, A. (1991) Pb/Pb, SmNd and RbSr geochronology in the Archean Craton of Zimbabwe. Chemical Geology: Isotope Geoscience section, 87 (3). 175-196 doi:10.1016/0168-9622(91)90020-w | Journal (article/letter/editorial) | | and Rb-Sr geochronology in the Archean Craton of Zimbabwe P.N. TayloP@,J.D. Kramersb,S. Moorbath”, J.F....Geology, University of Zimbabwe, P.O. Box M.P. 167, Mount Pleasant, Harare, Zimbabwe “8 Autumn Close, Harare...Harare, Zimbabwe (Received August 15, 1990; revised and accepted March 26, 1991) ABSTRACT Taylor, P.N...and Rb-Sr geochronology in the Archean Craton of Zimbabwe. Chem. Geol. (Hot. Geosci. Sect. ), 87: 175- 196...plutons and gneisses of the Archean Craton of Zimbabwe are presented together with Sm-Nd isotopic analyses |  | Jelsma, Hielke A., Vinyu, Michael L., Wijbrans, Jan R., Verdurmen, E. A. T., Valbracht, P. J., Davies, G. R., Valbracht, P. J. (1996) Constraints on Archaean crustal evolution of the Zimbabwe craton: a U-Pb zircon, Sm-Nd and Pb-Pb whole-rock isotope study. Contributions to Mineralogy and Petrology, 124 (1) 55-70 doi:10.1007/s004100050173 | Journal (article/letter/editorial) | | on Archaean crustal evolution of the Zimbabwe craton: a U-Pb zircon, Sm-Nd and Pb-Pb whole-rock isotope...felsic volcanic and plutonic rocks from northern Zimbabwe combined with field data and Pb-Pb and Sm-Nd wholerock...recently postulated on the basis of SHRIMP zircon ages. Zircon ages for basal felsic volcanics (2715+15...Department of Geology, University of Zimbabwe, P.O. Box MP167, Harare, Zimbabwe P.J. Valbracht Institut de Physique...lithostratigraphic correlations for the late Archaean in Zimbabwe. Zircon ages for a syn-tectonic gneiss (2667+4 Ma) |  | | 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 |  | 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) | | (95–99%), followed by grains of ilmenite, rutile, zircon, baddeleyite, monazite, PGM and gold. Altogether...from the Main Sulfide Zone of the Great Dyke in Zimbabwe (Oberthür et al. 1998, 2003, Oberthür 2002). In...alloys of Os–Ir–Ru–Rh–Pt found in the Somabula gravels of Zimbabwe (Oberthür et al. 2002a), we suggest...Platinum-group element mineralization of the Great Dyke, Zimbabwe. In The Geology, Geochemistry, Mineralogy and...platinum-group elements at Hartley platinum mine, Zimbabwe. 2. Supergene redistribution in the oxidized Main |  | | Journal (article/letter/editorial) | | F. P. Mennell—The Somabula Diamond Field of Rhodesia. 4591 Quarries. Characteristic fossils: Amplexi-zaphrentis...{To be concluded in our next number.) IV.—THE SOMABULA DIAMOND FIELD OF KHODESIA. By F. P. MENNELL, F...the opening up of the interesting deposit of the Somabula Forest, so far north of any other known occurrence...termed. No detailed or authentic description of the Somabula field has so far appeared. The writer briefly...1017/S0016756800118758 460 F. P. Mennell—The Somabula Diamond Field of Rhodesia. afiFord some idea of |  | | Journal (article/letter/editorial) | | M.D. PRENDERGAST AND M.T.D. WINGATE 585 Zircon geochronology and partial structural re-interpretation...Archaean Mashaba Igneous Complex, south-central Zimbabwe M.D. Prendergast Guesachan, Shielhill Road, Kirriemuir...South Africa ABSTRACT Ion microprobe (SHRIMP) U-Pb zircon dating has determined the age of a gabbroic enclave...fields are conspicuous greenstone components of the Zimbabwe craton and host important mineral deposits. Sills...preserved examples of a komatiitic sill in the Zimbabwe craton and contains important deposits of chrysotile |  | | Journal (article/letter/editorial) | | Marginal Zone of the Limpopo Belt in southern Zimbabwe represent a suite of dry magmas of tonalite-t...during late Archaean crustal growth in southern Zimbabwe invites comparison with modern convergent margins...rocks. The Limpopo Belt is located between the Zimbabwe and Kaapvaal Archaean Cratons of southern Africa...Northern Marginal Zone, which is situated in southern Zimbabwe (Fig. 1 ). The geology of the NMZ was first described...northern boundary of the NMZ, adjacent to the Zimbabwe Craton. Following Robertson and Du Toit (1981) |  | 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) | | PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE GREAT DYKE, ZIMBABWE Thomas OBERTHÜR§, Thorolf W. WEISER, Frank MELCHER...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...intrusions (Bushveld, South Africa; Great Dyke, Zimbabwe; Stillwater, USA) that host the overwhelming proportion...of knowledge on the Great Dyke of Zimbabwe. The Great Dyke of Zimbabwe constitutes the world’s second largest |  | | Report (chapter) | | India, Australia and southern Africa (Kaapvaal and Zimbabwe). The calculated gl values are in the range of...constant for a given craton through time, with Zimbabwe as a notable exception, for both mafic and felsic...of 8 + 0.2 and 8.32 + 0.29 in the Kaapvaal and Zimbabwe, respectively. Overall, there is therefore a strong...They include new data from the Belingwe belt of Zimbabwe. The locations of the selected areas are summarized...southern Africa (3.5-2.7Ga), with samples from the Zimbabwe and Kaapvaal cratons; Western Australia (3.5-2 |  | | Journal (article/letter/editorial) | | hydroxyl groups and molecular water in natural zircon (ZrSiO4)—Lutz Nasdala, Anton Beran, Eugen Libowitzky...Dieter Wolf REE, U, Th, and Hf distribution in zircon from western Carpathian Variscan granitoids: A...detrital components in the Karoo-age Somabula gravels, Gweru, Zimbabwe—T. Oberthür, T.W. Weiser, L. Gast...itabirite-hosted Au–Pd–Pt mineralization (jacutinga), Itabira District, Minas Gerais, Brazil—R. Kwitko, A.R. Cabral,...Kupferschiefer of the Lubin-Sieroszowice mining district (SW Poland)—A. Bechtel, R. Gratzer, W. Püttmann |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | NU 4.1.2. Congo Craton (DRC) 4.1.3. Zimbabwe Craton (Zimbabwe) 4.1.4. Kaapvaal Craton (South Africa)...Mineralogy 4.3.2. Kamativi Schist Belt (western Zimbabwe) 4.3.3. Orange River Pegmatite Belt (Namibia,...Birimian TE 5.1.4. Kaapvaal Craton D 5.1.3. Zimbabwe Craton 5.2.2. North-eastern DRC 5.3. Neoproterozoic...(Democratic Republic of the Congo), the Kamativi Belt (Zimbabwe) and the Jos Plateau (Nigeria). Mn-rich columbite-tantalite...late-orogenic (e.g., West African Craton, MA Zimbabwe Craton), post-orogenic (Kibara Belt, Damara Belt |  | | Journal (article/letter/editorial) | | Evidence from the rivers draining The Great Dyke in Zimbabwe (Oberthür et al., 2013) provides a view of the...maghemite at the edges. Accessory phases are rutile, zircon, garnet and baddeleyite with rare galena and sphalerite...the formation of oxidised PGM. The Great Dyke, Zimbabwe (Locmelis et al., 2010) and the Aguablanca deposit...the Main Sulphide Zone (MSZ) of the Great Dyke, Zimbabwe. Large Pt-Fe aggregates do occur in the rocks...South Africa, Melcher et al., 2005; Great Dyke, Zimbabwe, Oberthür et al., 2002, 2003, 2013; Uktus, Central |  | | Journal (article/letter/editorial) | | low-grade granitoid-greenstone terranes of the Zimbabwe and Kaapvaal Cratons (Fig. 1 ). The belt comprises...Zone ] ] IJmpepe Bin Southern Marginal Zone Zimbabwe Craton granitoid/greenstone Northern Kaapvaal...Craton graniloid/greenstone ] ] ] ---- Horore ZIMBABWE International Boundary 0, '7 ~0,0 ~o0 ..0...S oriented collision between the Kaapvaal and Zimbabwe Cratons. The Archaean crust of southern Africa...and Pb-Pb whole rock isochron ages and U - P b zircon ages between 2.7 and 2.65 Ga which are believed |  | Legros, Hélène, Mercadier, Julien, Villeneuve, Johan, Romer, Rolf L., Deloule, Etienne, Van Lichtervelde, Marieke, Dewaele, Stijn, Lach, Philippe, Che, Xu-Dong, Wang, Ru-Cheng, Zhu, Ze-Ying, Gloaguen, Eric, Melleton, Jérémie (2019) U-Pb isotopic dating of columbite-tantalite minerals: Development of reference materials and in situ applications by ion microprobe. Chemical Geology, 512. 69-84 doi:10.1016/j.chemgeo.2019.03.001 | Journal (article/letter/editorial) | | columbite-tantalite used non-matrix matched minerals like zircon or monazite (i.e., Smith et al., 2004; Melleton...No.239 pegmatite dike from the Dahe pegmatite district. This RI pegmatite is located in the eastern...oxides PT (MnTiO3, Fe2O3, LiNbO3, cassiterite, zircon, LiTaO3, scheelite, galena, ThO2, UO2). The RI...peerreviewed publications based on U-Pb SIMS analyses of zircon, monazite, or uranium oxides NU since more than...for an unknown sample of a considered mineral (zircon, monazite, the 206 AC xenotime, titanite, uraninite |  | | Journal (article/letter/editorial) | | 1943), Bloemhof, South Africa (Wilson 1982), Somabula, Zimbabwe (Stagman 1978), North Central Region, USA..."garimpos". Their characteristic heavy minerals are zircon, tourmaline, rutile, etc., which are typical minerals...(1978) 418 Group contain abundant magnetite (70%), zircon, tourmaline, and rutile, among others (Barbosa...Formation according to the following evidence: (a) zircon, tourmaline, and rutile, typically resistant to |  | | Report (volume) | | P. H. G. M. Tectono-magmatic evolution of the Zimbabwe Craton 135 151 183 Constraints on the Archaean...Stable isotopes in the Archaean Belingwe belt, Zimbabwe: evidence for a diverse microbial mat ecology...propose a tectono-magmatic evolution model for the Zimbabwe craton. The third section contains papers concerned...broad, and looks back to a meeting in Harare, Zimbabwe 50 years ago when Fermor and A. M. Macgregor explored...http: //www.ciw.edu/kaapvaal). The Kaapvaal and Zimbabwe Cratons of southern Africa form one of the pre-eminent |  | | Book | | ........................ 7.2 Evolution of the Zimbabwe Craton..........................................terrestrial records. Interpretations of the terrestrial zircon record in terms of a Hadean felsic continental...sampling bias in favor of preservation of resistant zircon grains vs an absence of labile mafic detrital material...al. 2007a, b), although in some instances U-Pb zircon ages may be inherited. Amphibolite to granulite...Williams Contrib Mineral Petrol 134:3–16, 1999). The zircon data suggest development of low temperature hydrosphere |  | | Journal (article/letter/editorial) | | platinum-group elements at Hartley Platinum Mine, Zimbabwe Part 2: Supergene redistribution in the oxidized...Placers Æ Great Dyke Æ Hartley Platinum Mine Æ Zimbabwe Editorial handling: O. Thalhammer T. Oberthür...Espoo, Finland Introduction In the Great Dyke of Zimbabwe, economic concentrations of platinum-group elements...cuts Archean granites and greenstone belts of the Zimbabwe craton (Worst 1960). Stratigraphically, the layered...of chromite (>90%), magnetite, rutile, ilmenite, zircon, 350 monazite, rare pyrite, and pentlandite |  | | Journal (issue) | | Update on Emeralds from the Sandawana Mines, Zimbabwe J.C. (Hanco) Zwaan, Jan Kanis, and Eckhard J.... UPDATE ON EMERALDS FROM THE SANDAWANA MINES, ZIMBABWE By J. C. (Hanco) Zwaan, Jan Kanis, and Eckehard...is believed by some that the area now known as Zimbabwe was the fabled land of Ophir, which produced gold...contributed to emerald formation in this part of Zimbabwe, but it also offers new data on the distinctive...geographers had referred—in the interior of what is now Zimbabwe, near Hartley (now Chegutu). Subsequently, after |
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