 | Smith, C.B., Sims, K., Chimuka, L., Duffin, A., Beard, A.D., Townend, R. (2004) Kimberlite metasomatism at Murowa and Sese pipes, Zimbabwe. Lithos, 76 (1) 219-232 doi:10.1016/j.lithos.2004.03.009 | Journal (article/letter/editorial) | | com/locate/lithos Kimberlite metasomatism at Murowa and Sese pipes, Zimbabwe C.B. Smith a,*, K. Sims b, L. Chimuka...South Africa c Rio Tinto Zimbabwe Ltd., 1 Kenilworth Rd, Newlands, Harare, Zimbabwe d Rio Tinto Mining and...Cambrian-aged Murowa and Sese kimberlite clusters located within the Archean Zimbabwe Craton just north...with the Limpopo Mobile Zone in southern central Zimbabwe, the metasomatism is intense and well exposed...(‘‘LTKB’’). Country rocks are 2.6 Ga Chibi and Zimbabwe granite batholiths emplaced into 2.6 – 2.9 Ga |  | | Journal (issue) | | Geological Society of Zimbabwe G Z S Newsletter February 2014 The Victoria Falls Summer Symposium...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare Geological Society of Zimbabwe Newsletter ...Talk summaries - Victoria Falls Summer Symposium, Zimbabwe, November 2013 .................................... 15 NEWS Geology Department, University of Zimbabwe ……………………………….. Geological Survey Department ………………………………………………...debeer@cadline.co.zw 2 Geological Society of Zimbabwe Newsletter February, 2014 Editorial This Newsletter |  | | 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 |  | | Book (volume) | | W. Skinner, and Jv. A. Robey The Victor Diamond Mine, Northern Ontario, Canada: Successful Mining of...Geology of the K1 and K2 Kimberlite Pipes at Murowa, Zimbabwe . . . . . . . . . Stephen Moss, Kimberley...Eastern Dharwar Craton, Undraldoddi Area, Raichur District, Karnataka, India . . . . . . . . . . . . . ....Geology and Evaluation of the K2 Kimberlite, Koidu Mine, Sierra Leone, West Africa . . . . . . . . . . ...Baffin Island, Nunavut: Canada’s Newest Diamond District . . . . . . . . . . . . . . . . . . . . . . . |  | Bulanova, G.P., Muchemwa, E., Pearson, D.G., Griffin, B.J., Kelley, S.P., Klemme, S., Smith, C.B. (2004) Syngenetic inclusions of yimengite in diamond from Sese kimberlite (Zimbabwe) — evidence for metasomatic conditions of growth. Lithos, 77 (1) 181-192 doi:10.1016/j.lithos.2004.04.002 | Journal (article/letter/editorial) | | of yimengite in diamond from Sese kimberlite (Zimbabwe) — evidence for metasomatic conditions of growth...b Rio Tinto Zimbabwe Ltd., Kenilworth Garden, 1 Kenilworth Rd., Newlands, Harare, Zimbabwe c Department...the Sese kimberlite (50 km south of Masvingo, Zimbabwe). One yimengite inclusion carries lamellae of...40 Ar/39Ar; Kimberlite; Mantle; Metasomatism; Zimbabwe 1. Introduction Yimengite, a very rare Large...concentrate from a kimberlite sill in the Guaniamo district, Venezuela (Nixon and Condliffe, 1989). The mineral |  | Bezzola, Martina, Hetman, Casey M., Garlick, Gareth, Creaser, Robert, Diering, Michael, Nowicki, Tom (2018) Geology and resource development of the Kelvin kimberlite pipe, Northwest Territories, Canada. Mineralogy and Petrology, 112. 463-475 doi:10.1007/s00710-018-0631-6 | Journal (article/letter/editorial) | | Canada, eight km northeast of the Gahcho Kué diamond mine. Kelvin was first discovered in 2000 by De Beers...Canada, eight km northeast of the Gahcho Kué diamond mine (Fig. 1). Exploration work was conducted by De Beers...medium- to coarse-grained pink- or whiteweathering biotite ± muscovite granites that are variably magnetic...strongly replaced by serpentine and hematite; biotite xenocrysts are rare (in contrast with KIMB3 described...degree of alteration of the country rock xenoliths. Biotite xenocrysts are common in all sub-phases. The representative |  | | Journal (issue) | | diamonds of cube and cuberelated shape from the Jwaneng mine,” Journal of Crystal Growth, Vol. 94, 1989, pp....has been more recently reviewed in an article of mine (B. Rondeau et al., “Diamants cubiques et presque...Rhodesia/ GLOBAL DIAMOND PRODUCTION SINCE 1870 Zimbabwe, Central African Republic, Tanzania, Brazil, Venezuela...1930s and the impact of World War II. The Premier mine closed in 1932, and the Kimberley mines were closed...decades. There was a jump in 1968 when the Finsch mine came into full operation, after which production |  | | Journal (article/letter/editorial) | | Primitive-mantle-normalized spectra of samples from Kimberley mine, South Africa, reported by le Roex et al. (2003)...Kalsilite-bearing kimberlite from the New Buffonta gold mine, Kirkland Lake area, northeastern Ontario. In Mid-Continent...Development and geology of the Kelsey Lake diamond mine, Colorado. Soc. Econ. Geol., Field Conference, Guidebook...and UV laser 40Ar/39Ar analysis of phlogopite–biotite. J. Petrol. 47, 1751-1783. Eggler, D.H. & Lorand...(1999): Petrology of the Meliadine Kimberlite Dykes, District of Keewatin, Northwest Territories, Canada. M |  | | Journal (article/letter/editorial) | | population of xenocrystic diamonds contributing to run-of-mine production. Evidence is accumulating that the diamond-forming...= Premier representing oldest Group I kimberlite mine (filled diamond), increasing thickness of solid...eclogite, but microdiamonds are more common in garnet-biotite gneiss and dolomitic marble, with concentrations...zircon, but also in quartz, clinopyroxene, and even biotite. As reviewed by Ogasawara (2005), metamorphic diamond...supported by the seismic tomography of the Kaapvaal-Zimbabwe craton, which shows a north-northwest–trending |  | | Journal (article/letter/editorial) | | AC single magmaclast (BI9883) recovered from a mine dump in the Venetia cluster of kimberlites in north-eastern...developed from the collision between the Kaapvaal and Zimbabwe cratons (Barton et al., 1983; Van Reenen et al...Venetia country-rocks include amphibolite gneisses, biotite schists, metaquartzites and marbles (Van Reenen...Description Sample BI9883 was derived from the Venetia mine dumps and is therefore likely derived from either...multi-shelled, juvenile magmaclasts in kimberlite, Venetia Mine. Unpublished B.Sc. Hons. thesis, University of Pretoria |  | Phillips, David, Harris, Jeffrey W., de Wit, Michiel C. J., Matchan, Erin L. (2018) Provenance history of detrital diamond deposits, West Coast of Namaqualand, South Africa. Mineralogy and Petrology, 112. 259-273 doi:10.1007/s00710-018-0568-9 | Journal (article/letter/editorial) | | Africa Swaziland Southern Botswana South Africa, Zimbabwe Cullinan, South Africa Southeast Botswana Kimberley...et al. 2004) D. Phillips et al. Kaapvaal and Zimbabwe Cratons (Fig. 1), the ArchaeanPaleoproterozoic...confined almost exclusively to the Kaapvaal Craton, Zimbabwe Craton and Limpopo Belt (Azanian Craton; McCourt...northern South Africa (e.g., Marnitz, Venetia) and Zimbabwe (e.g. Beit Bridge, Colossus) (Phillips et al....clinopyroxene inclusions, were collected from run-of-mine Namaqualand productions by staff of the Geology |  | Reguir, E.P., Chakhmouradian, A.R., Halden, N.M., Malkovets, V.G., Yang, P. (2009) Major- and trace-element compositional variation of phlogopite from kimberlites and carbonatites as a petrogenetic indicator. Lithos, 112. 372-384 doi:10.1016/j.lithos.2009.05.023 | Journal (article/letter/editorial) | | Available online 18 June 2009 Keywords: Phlogopite Biotite Kimberlites Carbonatites Trace elements LA-ICP-MS...complex solid solution are normally referred to as biotite. The composition of these minerals is E.P. Reguir...and UV laser 40Ar/39Ar analysis of phlogopite-biotite. Journal of Petrology 47, 1751–1783. Downes, H...A.R., Stoppa, F., Eby, G.N., 2002. Phlogopite-biotite parageneses from the K-mafic-carbonatite effusive... 2004. Kimberlite metasomatism at Murowa and Sese pipes, Zimbabwe. Lithos 76, 219–232. Srivastava, R |  | | Journal (article/letter/editorial) | | Premier, representing oldest Group-I kimberlite mine (filled diamond), increasing thickness of solid...xenocrysts in the 55 Ma A154 kimberlite of the Diavik mine, and interpreted as derived from a deeper, less...also in quartz, clinopyroxene, carbonates and biotite. A common theme for all occurrences is that the...Thabazimbi–Murchison lineament by convergence of the Zimbabwe craton with the Kaapvaal craton at ca. 2.6 Ga...the formation of the younger E-type diamond. The Zimbabwe–Kaapvaal collision, in turn, may have been responsible |  | | Journal (issue) | | formation. 223 Blue Sapphires from the Baw Mar Mine in Mogok Hpone-Phyo Kan-Nyunt, Stefanos Karampelas...bring our readers more of these “direct from the mine” articles, particularly from GIA’s dedicated field...Tanzania Kimberley Pilbara Madagascar KALAHARI Zimbabwe 25 RIO DE LA PLATA Singbum 31 Bastar CONGO...Orapa/Damtshaa, Letlhakane, Jwaneng, Finsch; (27) Murowa, Venetia, The Oaks, Marsfontein, Premier, Dokolwayo...trapped in geologic basins as in West Africa, Zimbabwe, and Brazil, where they can be panned for like |  | Abersteiner, Adam, Kamenetsky, Vadim S., Graham Pearson, D., Kamenetsky, Maya, Goemann, Karsten, Ehrig, Kathy, Rodemann, Thomas (2018) Monticellite in group-I kimberlites: Implications for evolution of parental melts and post-emplacement CO2 degassing. Chemical Geology, 478. 76-88 doi:10.1016/j.chemgeo.2017.06.037 | Journal (article/letter/editorial) | | pipe was intruded through Archean porphyritic biotite granites RI (Berg and Carlson, 1998; Kjarsgaard...SiO2-poor aphanitic kimberlite from the Wesselton mine, Kimberley, South Africa. Am. NU Mineral. 73,...Lukkarinen, H., 1992. K–Ar ages of hornblende and biotite from Late Archean rocks of eastern Finland. Geol... 2004. Kimberlite metasomatism at Murowa and Sese pipes, Zimbabwe. Lithos 76 (1 –4), 219 –232. Snowden...Mineralogy and petrology oftwo kimberlites at Dutoitspan mine, Kimberley, M.Sc. thesis, Rhodes Univ. Grahamstown |  | Kamenetsky, Vadim S., Kamenetsky, Maya B., Weiss, Yakov, Navon, Oded, Nielsen, Troels F.D., Mernagh, Terrence P. (2009) How unique is the Udachnaya-East kimberlite? Comparison with kimberlites from the Slave Craton (Canada) and SW Greenland. Lithos, 112. 334-346 doi:10.1016/j.lithos.2009.03.032 | Journal (article/letter/editorial) | | rocks, and contain fragments of country rocks (biotite granites and shales, respectively). The Jericho... 2004. Kimberlite metasomatism at Murowa and Sese pipes, Zimbabwe. Lithos 76, 219–232. Sobolev, N.V....Shortite in kimberlite from the Upper Canada Gold Mine, Ontario. Journal of Geology 81, 229–233. Zaitsev |  | Fulop, Alexandrina, Kopylova, Maya, Kurszlaukis, Stephan, Hilchie, Luke, Ellemers, Pamela, Squibb, Charlene (2018) Petrography of Snap Lake Kimberlite Dyke (Northwest Territories, Canada) and its Interaction with Country Rock Granitoids. Journal of Petrology, 59 (12) 2493-2518 doi:10.1093/petrology/egy025 | Journal (article/letter/editorial) | | (55-60 vol % plagioclase, 25-30% quartz, 1-5% biotite, 1-2% hornblende, 1% titanite and apatite). Closer...plagioclase is replaced by mica and chloritized biotite, and intensely altered tonalite composed of serpentinized...chlorite, clinochlore-2A, talc-2M, phlogopite and biotite, saponite, dolomite and calcite in bulk specimens...AF and SK acknowledge the support from Snap Lake mine and geologists Kevin Gostlin, Julianna Benke, David...lamprophyres from western Mexico: Biotite-liquid equilibria and P-T estimates for biotite-bearing igneous rocks. |  | | Journal (article/letter/editorial) | | fluids— Case studies from Ekati (NWT-Canada) and Murowa (Zimbabwe) . . . . . . . . . . . . . . . . . . . . ...BRANTLEY : Copper isotope fractionation in acid mine drainage . . . . . . . . . . . . . . . . . . . ...SUGIMORI , T. YOKOYAMA , T. MURAKAMI: Kinetics of biotite dissolution and Fe behavior under low O2 conditions |  | | Journal (issue) | | Natural-Color Blue Diamonds Black Diamonds from Zimbabwe Characterization of Yogo Sapphires Synthetic Diamonds...range. 132 pg. 134 Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite...specific locations—the Cullinan mine in South Africa and the Argyle mine in Australia. Although blue color...finds of type IIb diamonds are from the Cullinan mine in South Africa, while many blue/gray/violet diamonds...to hydrogen defects are sourced from the Argyle mine in Australia. • These four causes of color among |  | Dalton, Hayden, Giuliani, Andrea, Phillips, David, Hergt, Janet, Maas, Roland, Matchan, Erin, Woodhead, Jon, O'Brien, Hugh (2020) A comparison of geochronological methods commonly applied to kimberlites and related rocks: Three case studies from Finland. Chemical Geology, 558. 119899pp. doi:10.1016/j.chemgeo.2020.119899 | Journal (article/letter/editorial) | | MD-2 Mt. Dromedary (Villa et al., 2015). na biotite) are provided in Supplementary Table S1. The 87Rb...Exploration of the Argyle, Bunder, Diavik, and Murowa Diamond Deposits. Allen Press Inc., Kansas, pp...effect of chlorite interlayering on 40Ar– 39Ar biotite dating: an 40Ar–39Ar laser-probe and TEM investigations...age of the East Peripheral kimberlite at De Beers Mine, Kimberley, R.S.A. Geol. Mag. 120, 505-512. re...An investigation of closure temperature of the biotite Rb-Sr system: The importance of cation exchange |  | | Journal (issue) | | on amethyst, citrine, and ametrine from the Anahí mine, Bolivia • “Copal” resin from Madagascar • Iolite...publisher. ABOUT THE COVER The Ramona pegmatite district in southern California was the world’s leading...Harold & Erica Van Pelt. briefly visited the Mulungu mine near Parelhas (figure 2) in neighboring Rio Grande...Batalha (located 4.5 km north of Salgadinho). The mine is situated on a small steep-sided hill known as...Boqueirãozinho, or CDM mine) and Alto dos Quintos mines (also known as the Wild mine), the area of gem pegmatite |  | | Book | | of Canada: A Synthesis of Major Deposit-types, District Metallogeny, the Evolution of Geological Provinces...avec l'editeur. Gold-rich specimen fro1n the Don,e Mine, Tim1nins, Ontario that was presented to GSC in...of Canada A Synthesis of Major Deposit-Types, .District Metallogeny, the Evolution of Geological Provinces...of Canada: A Synthesis of Major Deposit-Types, District Metallogeny, the Evo lution of Geological Provinces...Massive Sulphide Deposits of the Finlayson Lake District, Yukon Jan Pete,; Daniel Layton-Matthews. Stephen |  | | Journal (issue) | | Madagascar • Orange sapphire from Greenland • Sweet Home mine rhodochrosite • New tourmaline find in San Diego...collected in 2015 by GIA gemologists at the Potentate mine at Rock Creek and from Cass Thompson’s mining operation...the Sapphire and Ruby Company of Montana, Ltd. to mine Spokane Bar. Given the worldwide interest being...ensuing years, several smaller operations continued to mine for sapphire along the gravel bars of the Missouri...Present-day mining includes operations of the Spokane Bar mine and Gold Fever Rock Shop (currently the largest |  | | Journal (issue) | | mastering the market. Looked at The New York diamond district has long been the center of diamond distribution...Shown here is the recovery plant at the Jwaneng mine in Botswana. Photo courtesy of Debswana. another...2020 Yasukazu Suwa I t took about 2,700 years to mine and fashion an estimated 0.8 tons of diamonds before...products have not been sullied at any step from mine to retail. Consumers want to know that their purchase...sold-out field trips to the Pala gem-pegmatite district were held before and after the conference. GIA |  | | Journal (article/letter/editorial) | | Contaminant geochemistry and migration in three different mine sites in Finland – Comparison of anthropogenic and...geochemistry and transport in soil at three different mine sites in Finland: Suurikuusikko, Siilinjärvi and...harmful elements in mine wastes and waters must be considered in risk assessment of mine sites. When evaluating...hydrothermal superimposition. Thus, the Dongping gold mine is a post-magmatic hydrothermal ore deposit with... Goldschmidt2013 Conference Abstracts U behaviour under acid mine drainage conditions: Preliminary results from an |
|
