 | Buchholz, P., Oberthur, T., Luders, V., Wilkinson, J. (2007) Multistage Au-As-Sb Mineralization and Crustal-Scale Fluid Evolution in the Kwekwe District, Midlands Greenstone Belt, Zimbabwe: A Combined Geochemical, Mineralogical, Stable Isotope, and Fluid Inclusion Study. Economic Geology, 102 (3) 347-378 doi:10.2113/gsecongeo.102.3.347 | Journal (article/letter/editorial) | | Crustal-Scale Fluid Evolution in the Kwekwe District, Midlands Greenstone Belt, Zimbabwe: A Combined Geochemical,...The Kwekwe district comprises the central part of the Archean Midlands greenstone belt of Zimbabwe and...Sb-bearing stage 3. Four gold deposits within the Kwekwe district have been studied. The Primrose and Globe and...gold mineralization at Jojo and especially the Indarama gold deposits probably formed at lower temperatures...early moderate- to late high-salinity fluids. At Indarama, microthermometric studies indicate stibnite-gold |  | | Journal (article/letter/editorial) | | mineralization in the Midlands greenstone belt: a new type of low-grade gold deposit in Zimbabwe Received: 29...in the Kwekwe district near the Indarama mine, approximately 200 km southwest of Harare, Zimbabwe. Based...shear-zone hosted gold mineralization in the Kwekwe district, for which a deep crustal origin has been discussed...central part of the Midlands greenstone belt is one of the largest gold districts in Zimbabwe and, on a world...gold-antimony deposits. During the past ten years, the Midlands greenstone belt has been the subject of several |  | | Report (chapter) | | mineralization in the Kadoma region of the Midlands greenstone belt, Zimbabwe R. J. H E R R I N G T O N Department...located in distinctive structural settings, and Zimbabwe is a good example with over 90% of its gold production...hosted deposits. The structural framework of the Zimbabwe craton is dominated by the evolution of the c...major shear zones focused strain, which in the Midlands greenstone belt, evolved from pure N-S compression...structural features seen in the gold deposits of the Midlands greenstone belt are consistent with such a model |  | Nutte, T. H. C., Oberth�r, T., Saager, R., Tomschi, H. -P. (1988) The geology, mineralogy and geochemistry of the broomstock gold deposit, Kwekwe Greenstone Belt, Zimbabwe; Some implications for gold mineralization in jaspilite iron formations. Mineralogy and Petrology, 39 (2) 145-162 doi:10.1007/bf01184820 | Journal (article/letter/editorial) | | Geochemistry of the Broomstock Gold Deposit, Kwekwe Greenstone Belt, Zimbabwe; Some Implications for Gold Mineralization...Geology Department, University of Zimbabwe, Mount Pleasant, Harare, Zimbabwe, 2 Mineralogisches Institut,...1988; accepted April 22, 1988 Summary At Broomstock Mine, three types of gold mineralization have been identified:...der Goldlagerstiitte Broomstock im Kwekwe Greenstone Belt, Zimbabwe: Bedeutung ~ r Goldvererzung in jaspitischen...jaspitischen Eisenformationen. In der Broomstock Mine treten drei Typen yon Goldmineralisationen auf: |  | | Journal (article/letter/editorial) | | Kolar goldfield, India Nevoria, W. Australia Cuiaba Mine, SE Brazil Bronzewing, W. Australia Junction, W...Uti, India Primrose, Kwekwe district Jojo, Kwekwe district Indarama, Kwekwe district Igarape Bahia, Brazil...(Yilgarn), Brazilian, and South African (Barberton and Zimbabwe), Scandinavian, Indian, and Australia (Superior...with allowance for gold extracted over the entire mine life. Deposits with reserves over 100 tons usually...Australia Harnas area, Sweden Aitik, Sweden Paiol mine, Brazil Kamennoe, Russia Cobalt Hill, Canada Gongo |  | Oberthür, T., Blenkinsop, T. G., Hein, U. F., Höppner, M., Höhndorf, A., Weiser, T. W. (2000) Gold mineralization in the Mazowe area, Harare-Bindura-Shamva greenstone belt, Zimbabwe: II. Genetic relationships deduced from mineralogical, fluid inclusion and stable isotope studies, and the Sm-Nd isotopic composition of scheelites. Mineralium Deposita, 35 (2) 138-156 doi:10.1007/s001260050012 | Journal (article/letter/editorial) | | Mazowe area, Harare-Bindura-Shamva greenstone belt, Zimbabwe: II. Genetic relationships deduced from mineralogical...In the Mazowe area some 40 km NW of Harare in Zimbabwe, gold mineralization is hosted in a variety of...the mainly granodiorite-hosted workings at Mazowe mine are on pyrite-rich reefs, mines of the Bernheim...Stori's Golden Shaft and Alice mine, both in metabasalts, work sul®de-poor quartz veins. In contrast to the...on other cratons. Stable isotope compositions of quartz from the various deposits (d18O 10.8 to 13.2& |  | | Journal (article/letter/editorial) | | India, South Africa, Australia, Finland, and Zimbabwe. The data were taken from 33 publications and...Valdez Group, USA Venus, Canada Monte Rosa gold district, Italy Fairview, Oro Fino, Canada Twin Lakes,... USA Bralorne-Pioneer, Canada Monte Rosa gold district, Italy Bralorne-Pioneer, Canada Callery, New Zealand...New Zealand Böckstein, Austria Monte Rosa gold district, Italy Kensington, USA Jualin, USA Shannan area...Mazhala, China Qolqoleh, Iran Bangbu, China Oriental mine, USA Big Hurrah, USA Mouther Lode, USA Yata, China |  | | Report (issue) | | Gold-antimony deposits are associated with low-sulfide gold-quartz vein deposits that occur in deformed metamorphic................... 19 ABSTRACT Gold-stibnite-quartz vein deposits and stratiform disseminated-veined...(940-1000 fineness), aurostibite in metamorphosed quartz-carbonate vein in compressive shear zones in low-grade...belts. The veins are similar to low sulfide gold-quartz veins but are very rich in sulfides, especially...talc-chlorite, talc-carbonate, quartz-chloritecarbonate schists, and slate; in quartz-feldspathic rocks, mainly |  | Obolensky, A.A., Gushchina, L.V., Borisenko, A.S., Borovikov, A.A., Nevol’ko, P.A. (2009) Computer thermodynamic modeling of the transport and deposition of Sb and Au during the formation of Au-Sb deposits. Russian Geology and Geophysics, 50 (11) 950-965 doi:10.1016/j.rgg.2009.10.004 | Journal (article/letter/editorial) | | According to the known classifications of ore deposits, quartz-vein Au-Sb deposits are referred to as Au-Sb or...group of gold-stibnite-quartz deposits as an ore association among other gold-quartz ore associations. At...South African (Gravelot, United Jack, Weigel, Indarama, Gothic), Australian (Blue Speck, Wiluna), Yenisei...relationship with vein low-sulfide-Au-quartz and Au-scheelite-quartz deposits referred to as orogenic gold...hydrothermal-metamorphogenetic vein Au-Sb, Au-quartz, and Auscheelite-quartz deposits are known in the South African |  | | Journal (article/letter/editorial) | | microthermometric and laser-Raman analysis on stibnite-bearing quartz veins and breccias reveal that the antimony- and...intimate spatial association of stibnite and gold in quartz veins and breccias in the stibnite-gold orebodies... In Zimbabwe, Buchholz et al. (1994) 937 described gold-antimony mineralization in the Kwekwe district...district within the Midlands greenstone belt. In the Yilgarn Craton of Western Australia, Playter (1936)...brittle fault zones that contain small (<0.5 m) quartz shear veins. All mafic rocks display rutile (leucoxene) |  | | Journal (article/letter/editorial) | | predominantly stibnite, gangue minerals consist of quartz, calcite, fluorite and barite. The mineral assemblages...include early-stage quartz-stibnite, fluorite-quartz-stibnite and barite-quartz-stibnite, and late-stage...precipitation mechanism for ores in the Xikuangshan ore district, conventional and infrared microthermometric measurements...inclusions hosted in those transparency minerals (quartz, fluorite and barite) and opaque stibnite, * ...stibnite and associated gangue minerals in this ore district display significant differences. Fluid inclusions |  | | 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...mineralization in the Kadoma region of the Zimbabwe Midlands. Three papers describe the structures of the...: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 (article/letter/editorial) | | andthe conditions of deposition. fromthe Seiniijoka district,Finland(Borodaev et al., 1983), Stibnite,ashasalreadybeennoted...1988). vanandAndrS•,1994),andtheAlpha-Gravelotte mine,South Interestingly, theprincipal mineral associations...serieite and berthierite, and then stibnite Gangue: quartz,muscovite, rutfie, ehlorite, carbonates Sulfides...Nativeantimony or gudmundite dominant Seiniijoki district,Finland PiiakkOnen (1966),Balitsky et al. (1976)...Gudmundite (Gud)surrounded byberthierite (Brt)in quartz. Theplanarcontacts between thetwosulfide minerals |  | | Journal (article/letter/editorial) | | Light rare earth elements enrichment in an acidic mine lake (Lusatia, Germany)—Elke Bozau, Marc Leblanc...anthropogenic factors influencing mercury speciation in mine wastes: An EXAFS spectroscopy study— Christopher...by oxygen isotope data: The case of Sandawana, Zimbabwe—Johannes C. (Hanco) Zwaan, Alain Cheilletz, and...2004 Is groundwater in the Tarkwa gold mining district of Ghana potable? —Jerry S. Kuma Selenium source...of Archean volcanogenic massive sulfide related quartz: Noranda, Ben Nevis and Matagami districts, Abitibi |  | | Journal (issue) | | Geological Society of Zimbabwe G Z S Newsletter February 2015 The annual Summer Symposium has been...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare Geological Society of Zimbabwe Newsletter ...Dyke, Zimbabwe Freddy Chikwiri …………………………………………………………………….. Hydrocarbon Potential in Zimbabwe - Brent...……………………………… 14 NEWS Geology Department, University of Zimbabwe ……………………………….. The Professor Tom Blenkinsop UZ...………………………………………. 24 2 Geological Society of Zimbabwe Newsletter February, 2015 Editorial Its AGM |  | | Book (edition) | | example for such a situations can be seen in euhedral quartz crystals embedded in the sulfide matrix of fossil...normally contain amorphous silica/opal rather than quartz in its initial stages, as is the case in modern...displaying various colours under XPL; euhedral quartz shows milky internal reflections. Internal Reflections...Late proustite (red internal reflections) filling quartz druse (milky); dike filling. Right (third from...(often 120º). Right (top): Recrystallised euhedral quartz (dark grey) in pyrite (creme) and chalcopyrite |  | | Journal (article/letter/editorial) | | The G3 granite has a porphyritic texture with quartz, microcline and biotite minerals and contains magmatic... garnet and biotite and the leucosome contains quartz, plagioclase and K-feldspar. The calcareous granulite...subhorizontal stretching lineations defined by stretched quartz and biotite grains. On the XZ section of the mylonite...medium to coarse-grained texture consisting of quartz, feldspar, biotite, garnet and sillimanite. It...showing equigranular and rapakivi texture with quartz, feldspar and biotite minerals (figures 3c and 4b |  | | Journal (article/letter/editorial) | | tantalum-columbium, bismuth, molybdenum,corundum,mica,quartz (silica), and felspar, discussed later. as well...Struck", occur in a host rock setting consistingof quartz and felspar porphyritic volcanic rocks, all with...layeredultramaficcomplexes;(2) in places,with gold-quartz to be younger than the greenstonebelts but older...Rhodesia(locatedin the Midlands greenstonebelt, intrusive granites. The Scotia Talc Mine in the halfway betweenthe...GeologicalSetting Area and Reference Range Mean Selukwe Peak Mine 52.32-58.41 55.59 Railway Block, Priority 1 Magazine |  | | 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...for views of Wankie Colliery and the Trojan nickel mine, and to the Photographic Section of the Ministry...near Salisbury. facing page 23 IV Trojan Nickel Mine, near Bindura. facing page 33 V The Great Dyke...Complex. VI Chrome seam in the Great Dyke, Vanad Mine. VII Lower Karoo Landscape. No. 1 Colliery, Wankie |  | | Book (edition) | | Metal : Oxygen = 1:2 (MO2 and related compounds) Quartz IV/D.01-10 Silica, amorphous IV/D.01-80 Rutile...Reflections: Reflectance [%]: Anisotropy: Pleochroism: quartz veins, alluvial deposits gold-yellow, silver-white...Anhedral electrum (yellowish white), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic....white), argentite (greenish grey), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic....goethite (bluish grey shades), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. |  | | Journal (issue) | | carbonates, dolomite, members of the zeolith group and quartz. The results reflect that other common rock-forming...)3Cl SiO, TiO, Pyromorphite Pyromorphite Quartz Quartz Rutile Rutile Sb(OH); Silver Takovite Umangite...Sci 69(5):452-454 Research article Arsenic in mine waters: an international study M. Williams Abstract...Hydrochemical data are presented for arsenic (As) in the mine waters of 34 gold and base-metal mining localities...As**-As°* relationship with mine water pH/Eh regime. Important determinants of mine water As fluxes include |  | | Journal (issue) | | ........ 337 by D. J. Mossman The Colorado Quartz mine, Mariposa County, California: a modem source...advertising 602-299-5274 COVER: GOLD crystals on quartz, from Zlatna, Romania. The longest crystal measures...she and Brooks became part owners of the Old Yuma mine nearby. After a few years her strong love of minerals...ventures in Mex ico (particularly the San Francisco mine in Sonora). Many extraor dinary specimens passed...fuse cutting pliers, and plunger-type detonators. Mine bells and the bell signal sign that accompanied |  | | Book | | Introduction CHAPTER I Mink Labotjb 1. Census of mine employees.—2. Socialistic Unionism.—3. Premium on...French company.—10. Tronoh mines.— 11. Batu Gajah district.—12. Gopeng hydraulicking.—13. Pioneer dredges...wages.—15. Ballarat gold-fields.—16. Alluvial and quartz.— 17. The 'Indicators.'—18. Chief producers.—19...Bulkheads.—14. Stope and block methods at Central Mine ..... 108-1 1G xii CONTENTS CHAPTER XII NEW...117-124 CHAPTER XIII TASMANIA Mount Lyell Copper-Mine 1. Region of divera interests.—2. Climatic defects |  | | Book (edition) | | Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...polished mineral surface, expressed in clase. 7 - quartz. 8 - topaz, 9 - corundum, 10 - dia- percentage...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite, sursassite, ardennite, Triclinic |
|
