 | | Journal (article/letter/editorial) | | granite: further evidence for 3.4 Ga magmatism in the Zimbabwe craton M. H. DODSON*†, I. S. WILLIAMS* & J. D...Geology, University of Zimbabwe, P.O. Box M.P.167, Mount Pleasant, Harare, Zimbabwe (Received 29 August...independently published ages for the Mushandike Granite, Zimbabwe (2.92 ± 0.17 Ga and 3.45 ± 0.13 Ga) has been resolved...with published data from elsewhere in southern Zimbabwe, the results imply a widespread magmatic event...in the Archaean granite–greenstone terrane of Zimbabwe span an age range from 3.5 to 2.7 Ga. Three main |  | | Report (chapter) | | March 6, 2015 Archaean deformation patterns in Zimbabwe: true indicators of Tibetan-style crustal extrusion...Geology, University of Zimbabwe, PO Box MP167, Mount Pleasant, Harare, Zimbabwe Abstract: Recent models...models of the structural evolution of the Zimbabwe Archaean craton have stressed the role of WSW-trending...have re-examined many of the structures of the Zimbabwe craton and find the extrusion model largely untenable...reflect part of the structural response of the Zimbabwe crust to NNW-SSE shortening resultant from collision |  | Abell, P.I., McClory, J., Martin, A., Nisbet, E.G., Kyser, T.K. (1985) Petrography and stable isotope ratios from Archaean stromatolites, Mushandike Formation, Zimbabwe. Precambrian Research, 27 (4) 385-398 doi:10.1016/0301-9268(85)90095-6 | Journal (article/letter/editorial) | | ARCHAEAN STROMATOLITES, MUSHANDIKE FORMATION, ZIMBABWE P.I. A B E L L ' , J. M c C L O R Y ' , A. M A...t i o n , Zimbabwe. Precambrian Res., 27 : 385--398. The Mushandike Sanctuary, near Masvingo ( F o r t...stromatolites from the Mushandike Sanctuary, near Masvingo which was formerly called Nyanda (1982), and formerly...formerly called Fort Victoria (1890--1981), Zimbabwe (Fig. 1). These stromatolites occur in a limestone...the Mushandike granite. Close to the limestone, andalusite has developed in metapelites; within the limestone |  | | Journal (issue) | | Geological Society of Zimbabwe G Z S Newsletter October 2015 No. 3 of 3 of 2015 Heavy mineral concentrate...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 .................................11 12 NEWS Geology Department, University of Zimbabwe – Maideyi Meck ……………… The Professor Tom Blenkinsop... ! ! ! ! ! ! ! ! ! 2 Geological Society of Zimbabwe Newsletter October, 2015 Editorial Welcome to |  | | Journal (issue) | | USA USA USA USA USA USA USA USA USA USA USA USA Zimbabwe Utah Utah Utah Utah Utah Utah Utah Utah Utah...Wisconsin Wisconsin Wisconsin Wisconsin Wisconsin Masvingo Cheyenne Mountain Dugway Range Emery Co. Eureka...Michigan Norway Iron Mine 6 6 alabandite Zimbabwe Bikita 11 9 amazonite Brazil Minas Gerais...13 amethyst Utah La Sal Mountains 4 10 andalusite South Dakota Oreville 4 2 anglesite Utah...(blue) Utah Ibapah Mountains 4 10 bikitaite Zimbabwe Bikita 11 3 biotite Connecticut Strickland |  | Russell, J., Chadwick, B., Rao, B.Krishna, Vasudev, V.N. (1996) Whole-rock PbPb isotopic ages of Late Archaean limestones, Karnataka, India. Precambrian Research, 78 (4) 261-272 doi:10.1016/0301-9268(95)00082-8 | Journal (article/letter/editorial) | | stromatolitic limestone from the Masvingo greenstone belt, Zimbabwe, and in so doing demonstrated that...higher-temperature mineral assemblages which include andalusite, sillimanite and cordierite in the Late Archaean |  | | Report (volume) | | Blenkinsop examine Archaean deformation patterns in Zimbabwe and the adjacent Limpopo Belt and discuss the...Stratigraphic and tectono-stratigraphic problems in Zimbabwe and Western Australia are described in the next...gold mineralization in the Kadoma region of the Zimbabwe Midlands. Three papers describe the structures...:INSOP,T. G. Archaean deformation patterns in Zimbabwe: true indicators of Tibetan style crustal extension...geochronology of Archaean felsic sequences in the Zimbabwe craton: a revision of greenstone stratigraphy |  | | Journal (issue) | | independent sales channels. New estimates about Zimbabwe peg its diamond production at 40 million carats...com/2009/06/27/ world/africa/27zimbabwe.html?_r=1&ref=zimbabwe. Eddins C. (2010) Significance of horsetail inclusions...ader-hitsroadblock, Mar. 17. Thomas M. (2010) Zimbabwe to become biggest supplier of diamonds to Surat...http://timesofindia.indiatimes.com/city/surat/ Zimbabwe-to-become-biggest-supplier-of-diamonds-to-Surat/...operations are still active, as are three onshore ones. Zimbabwe derived its diamonds from one kimberlite mine |  | | Book | | Russia (Ural mountains), Zambia (Kafubu) and Zimbabwe (Sandawana)). Their study demonstrates how these...vividly coloured Mn-rich minerals (kyanite, green andalusite, garnet -grossular, and spessartine- and red-epidote)...(Figure 2). Colombia, Brazil, Zambia, Russia, Zimbabwe, Madagascar, Pakistan, and Afghanistan (Figure...Gliza. South Africa: 18. Gravelotte. Zimbabwe: 19. Sandawana, Masvingo, Filibusi. Mozambique: 20. Morrua...Carnaíba, Brazil; Poona, Australia; Sandawana, Zimbabwe) or remain unclassified, such as the Gravelotte |  | | Report (issue) | | weighed 455 kilograms. 2m: The Queen Anne mine in Zimbabwe has produced crystals up to 2 meters in length...Indian location) and cordierite, sillimanite, andalusite, quartz, and biotite at the Japanese location... Left: Gem rough from the Baboon Hill mine in Zimbabwe s Mwami district, the largest stone is 1 . 5 cm...localities are found in Mozambique, Namibia, Zambia and Zimbabwe. Superb specimens of aquamarine have come from...emerald has been known for decades from Zambia and Zimbabwe. The following is a survey of some of southern |  | | Book | | 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...Quartz; Ky = kyanite; Sill = sillimanite; And = andalusite. marking arrested replacement of orthopyroxene...assemblages containing these minerals. *Symbols: And-andalusite, Bi-biotite, Ca-calcite, Chl-chlorite, Cor-cordierite |  | | Report (issue) | | 195 Zambia . . . . . . . . . . . . . . . . 203 Zimbabwe . . . . . . . . . . . . . . . 213 Other Countries...chromite resulting from cutbacks in South Africa and Zimbabwe, and of phosphate rock owing to a lower output...petroleum. Others of importance in world trade were andalusite, antimony, asbestos, bauxite, coal, copper, fluorspar...Namibia for quartz crystal; South Africa for andalusite, antimony, asbestos, chromium, diamond, fluorspar...cobalt, copper, and diamond; Zambia for cobalt; and Zimbabwe for chromium and lithium. U.S. exports to Africa |  | | Book | | nite forms at temperatures between those phs andalusite and sillimanite. It occurs in neisses, and associated...other sedimentary rocks, as in this example from Zimbabwe. BANDED magnetite and chert layer GRAIN SIZE...dilute acid. Soapstone quarries of the Great Dyke, Zimbabwe provide material for sculpture. SOAPSTONE A...R P H I C R O C K S Spotted Slate PRISMATIC andalusite crystals can be seen in this purple spotted slate...minerals that form the spots are cordierite and andalusite, the former as darker diffuse areas and the latter |  | 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 (issue) | | sources, e.g. Russia, Brazil, Sri Lanka, Madagascar, Zimbabwe, India and Tanzania, are being compiled and, in...other non-gem materials such as cordierite or andalusite (chiastolite) (Petreus, 1974; Henderson, 1995)...deposits in the Urals, Russia, and from Novello, Zimbabwe. Historical background The first emeralds originating...occurrence from the Novello deposit, Masvingo District, Zimbabwe. Geology of the Lake Manyara deposit...of the Urals, Russia, and the Novello deposit, Zimbabwe. Scope of the present paper Mineralogical and |  | | Report (edition) | | 6 Other gemstones Chapter 18 Andalusite and chiastolite 165 Andalusite ....................................................................... 165 Andalusite polymorphs ............................................................................ 166 Andalusite in Western Australia ..........................161 18.1 18.2 18.3 18.4 18.5 A row of faceted andalusite gems....................................................................... 166 Location of andalusite and chiastolite prospects in Western Australia |  | | Book (edition) | | Mine), Bindura District, Mashonaland, Central Zimbabwe (sample: Melcher/Oberthür); PPL C Pentlandite...(cream), pyrite (cream tint); Ngezi Concession, Zimbabwe (sample: Melcher/Oberthür); PPL If marked in description...Mining District (Hartley Mining District), Masvingo, Zimbabwe (sample: Melcher/Oberthür); PPL If marked...(light and darker grey, bireflectance); Indarama, Zimbabwe (sample: Seifert); PPL B Euhedral to subhedral...prominent cleavage); Viceroy Mine, Harare District, Zimbabwe (sample: Goldmann/Oberthür); PPL B Fizélyite (indistinct |  | | Report (edition) | | 6 Other gemstones Chapter 15 Andalusite and chiastolite 173 Andalusite minerals .............................................................. 173 Andalusite polymorphs............................................................................. 174 Andalusite in Western Australia................................ 169 15.1 15.2 15.3 15.4 15.5 Faceted andalusite gems...................................................................... 174 Locations of andalusite and chiastolite prospects in Western Australia |  | | Journal (issue) | | zircon, alexandrite, topaz, garnet, spinel, andalusite, and tourmaline. Important placers formed in...production. In 2005, Colombia, Brazil, Zambia, Russia, Zimbabwe, Madagascar, Pakistan, and Afghanistan were the...Mountains (Grundmann and Giuliani, 2002), and Zimbabwe, from the Sandawana (formerly Zeus) mine approximately...Kenticha madagascar: Ianapera, mananjary Zimbabwe: Sandawana, masvingo, Filabusi a With a metamorphic remobilization...and origin of the Sandawana emerald deposits, Zimbabwe. Scripta Geologica, Vol. 131, pp. 1–211. Zwaan |  | | Journal (issue) | | 6/18/12 3:28 PM Page 144 maline, quartz, and andalusite. In both beryl and corundum, the trapiche phenomenon...[A. J .A. “Bram” Janse] New ruby discovery in Zimbabwe. By F. Marsh and F. Mugumbate [James E. Shigley*]...MISCELLANEOUS GEM LOCALITIES Diamonds: A good deal for Zimbabwe? By Global Witness [Edward Johnson*] Alexandrites...Novello alexandrite-emerald deposit, Masvingo District, Zimbabwe. By K. Schmetzer et al. [Edward R. Blomgren*]...Novello alexandrite-emerald deposit, Masvingo District, Zimbabwe. K. Schmetzer, S. Stocklmayer, V. Stocklmayer |  | | Book (edition) | | Noua, Banat, Romania. Also abundant at Bikita, Zimbabwe, where allophane and bikitaite are late hydrothermal...and at Sakangyi, Katha dist., Myanmar. At Mtoko, Zimbabwe, at Muiane, Alto Ligonha dist., Mozambique, and...Varennes, Quebec. ZVMO 126, I, 96-108, 1997. Andalusite Al 2 [O1(Si0 4 )] (9.A, sillimanite group). Varieties:...radiating aggregates to many cm to dm long. Pink, Andalusite - chiastolite, polished, 35 mm, Bimbowrie, Australia...pegmatites at Dolni Bory, Moravia, Czech Rep. Andalusite is a characteristic mineral of metamorphic hornfelses |  | | Report (issue) | | earlier work in Kenya. A collaborative project in Zimbabwe brought together remote sens ing and hydrogeology...recomrnendatrons on how it can be re duced or eliminated. Zimbabwe Geological investigations are contIDuing in the...the Archaean Midlands G reenstone Belt of Zimbabwe as part of an integrated exploration project in which...techniques are being used in a study in south-east Zimbabwe aimed at improving the success rate of boreholes...left Thls Landsat TM image shovvs south-east Zimbabwe dwmg the dry season The 1Inage has been pro cessed |  | | Book | | 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...cumulates.from the P1 pyroxenite of the Great Dyke, Zimbabwe (sections courtesy of A.H. Wilson). A is from |  | | Book | | Africa, United Kingdom, United States of America, Zimbabwe Corp CV Corporation United States of America...Africa, United Kingdom, United States of America, Zimbabwe Ltda _ Limitada Brazil, Portugal Ltée Limitée...Proprietary Australia, South Africa Pvt Private /ndia, Zimbabwe SA_ Société Anonyme Belgium, France, Luxembourg...Durban, South Africa. Zimbabwe Office PTA House, 19 Union Avenue, Harare, Zimbabwe. Directors D.C.Marshall...mining, farming, ranching and property holding in Zimbabwe, South Africa and the ‘ Subsidiaries/Associates |  | | Journal (issue) | | twinned alexandrite crystal slice from near Masvingo, Zimbabwe. ‘Keke’ Saint-Clair Fonseca Junior, BC Gemas...varieties from andalusite to zircon. The fact that it starts with a photo of a cat’seye andalusite reflects |
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