 | Ballo, Ibrahima, Hein, Kim A.A., Guindo, Boukary, Sanogo, Lassana, Ouologuem, Yalema, Daou, Gaoussou, Traore, Amadou (2016) The Syama and Tabakoroni goldfields, Mali. Ore Geology Reviews, 78. 578-585 doi:10.1016/j.oregeorev.2015.10.019 | Journal (article/letter/editorial) | | The syama and tabakoroni goldfields, Mali Ibrahima Ballo, Kim A.A. Hein, Boukary Guindo...Daou, Gaoussou, Traore, Amadou, The syama and tabakoroni goldfields, Mali, Ore Geology Reviews (2015), doi:...pertain. ACCEPTED MANUSCRIPT The Syama and Tabakoroni goldfields, Mali Ibrahima BALLOa; Kim A.A. HEINb;...Des Mines de Syama (SOMISY SA) Rue 50, Porte 688; BP-E 1582 Bamako, SC R Badalabougou, Mali: ibrahimab@somisy...Abstract Gold deposits in the Syama and Tabakoroni goldfields in southern Mali occur along a north-northeast |  | | Journal (article/letter/editorial) | | alteration and subsequent supergene oxidation in Goldfield, Nevada. The results indicate that pervasive weathering...present in the oxidation zones of ore deposits, acid mine drainages, hydrothermal ore deposits, hot springs...dating from two weathering profiles, Goldfield, Nevada, and Syama, Mali (West Africa). RENEWEDINTERESTin...time-space evolution of weathering processes. In Goldfield, Nevada, jarosite and alunite are often present...degassing step. GOLDFIELD JAROSITE ANALYSES: SAMPLES 2676 J 2677 13372 The first site, Goldfield, NV (Fig. |  | Olson, Steven F., Diakite, Kassoum, Ott, Lawrence, Guindo, Ambogo, Ford, Christopher R. B., Winer, Nicholas, Hanssen, Eric, Lay, Nilda, Bradley, Robin, Pohl, Demetrius (1992) Regional setting, structure, and descriptive geology of the middle Proterozoic Syama gold deposit, Mali, West Africa. Economic Geology, 87 (2) 310-331 doi:10.2113/gsecongeo.87.2.310 | Journal (article/letter/editorial) | | andDescriptiveGeologyof the Middle ProterozoicSyamaGold Deposit,Mali, West Africa STEVEN F. OLSON,* KASSOUM DIAKITE,...DEMETRIUS POHL* BHP-UtahMali, Inc., B.P. 2856, Bamako,Mali Abstract The Syamagold depositlies in a Birimian(2...gold-bearingmineral and occursdisseminatedin veinlet halosand breccia clasts.Green chloriticbasaltis the preferredbut...of the middle ProterozoicBirimian 310 SYAMA Au DEPOSIT, MALI, WEST AFRICA 12Ow IOOW 8iW I 6iW 311...311 4øW --14ON ' Loul• M A L I o Bamako SYAMA 12øN -- , ' ' of'•fi•u'r.; ' . B R A I |  | Kříbek, Bohdan, Sýkorová, Ivana, Machovič, Vladimír, Knésl, Ilja, Laufek, František, Zachariáš, Jiří (2015) The origin and hydrothermal mobilization of carbonaceous matter associated with Paleoproterozoic orogenic-type gold deposits of West Africa. Precambrian Research, 270. 300-317 doi:10.1016/j.precamres.2015.09.017 | Journal (article/letter/editorial) | | deposits in Burkina Faso (the Inata deposit), in Mali (the Syama deposit), and in Ghana (the Obuashi and Bogoso...deposits), Burkina Faso (the Inata deposit) and Mali (the Syama deposit) using methods of optical microscopy...two major vibrons in the first-order Raman spectra region attributed to the crystalline and disordered phases...recorded at the Bogoso deposit. The Rmax values at Syama lie between the two groups. (2) 5.2. XRD patterns...measurements Rmax (%) Rmin (%) Number of measurements Syama, SYD044/4 Inata, INDD0064/2 Inata, INDD0064/1 Obuashi |  | | Journal (article/letter/editorial) | | Bystrinskoe Cu-Au-Fe deposit (Eastern Trans-Baikal Region): Russia’s first example of a skarn-porphyry ore-forming...Limpopo Province, South Africa: Evidence for a breccia pipe origin?— Jeff B. Chaumba, Humbulani R. Mundalamo...oxidized and reduced granitoids from the Uetsu region, NE Japan— Yuya Izumino, Teruyuki Maruoka, and...Jochen Kolb and Nikolay Petrov The Syama and Tabakoroni goldfields, Mali—Ibrahima Ballo, Kim A.A. Hein, Boukary...Progressive gold mineralization along the Syama corridor, southern Mali (West Africa)—Yollande Dasso Traoré |  | Parra-Avila, Luis A., Kemp, Anthony I.S., Fiorentini, Marco L., Belousova, Elena, Baratoux, Lenka, Block, Sylvain, Jessell, Mark, Bruguier, Olivier, Begg, Graham C., Miller, John, Davis, James, McCuaig, T. Campbell (2017) The geochronological evolution of the Paleoproterozoic Baoulé-Mossi domain of the Southern West African Craton. Precambrian Research, 300. 1-27 doi:10.1016/j.precamres.2017.07.036 | Journal (article/letter/editorial) | | westernmost 51 portion when compared to the easternmost region. In addition, the new U-Pb data identify 52 ... some of the oldest felsic intrusions in the region, including a granite from Burkina Faso (2265 53...southern Mali. This study also reveals 54 inherited Archean zircon cores from across southern Mali. The...74 of involvement of older Archean crust in a region that is regarded to be the result of juvenile ...Nonetheless, most of 80 these studies are the result of mine-scale to belt-scale mapping projects, in many cases |  | | Journal (article/letter/editorial) | | deposits discovered, delineated and 62 developed in Mali, Mauritania, Senegal, Burkina Faso, Ghana and Cote...Ma in the Kédougou-Kéniéba Inlier in Senegal and Mali (Dioh et al., 2006), and 2181 172 - 2117 Ma in...1) crops out over 16 000 km2 in Senegal and 180 Mali, and is interpreted as the product of accretion...presence of the volcanic rocks in 247 the Dakar region indicates that magmatic activity, with concomitant...there are a number in Ghana, Burkina Faso and 260 Mali that formed before the Eburnean Orogeny (Tangaean |  | Mil�si, J.P., Ledru, P., Ankrah, P., Johan, V., Marcoux, E., Vinchon, Ch. (1991) The metallogenic relationship between Birimian and Tarkwaian gold deposits in Ghana. Mineralium Deposita, 26 (3) doi:10.1007/bf00209263 | Journal (article/letter/editorial) | | Marlu-Bogosu Tarkwaian-hosted Old Tarkwa TARKWA GOLDFIELD Teberebie Iduapriem Ntronang 584 175 50-70 40... 0,62 1.92 2.65 4.8 TARKWA: active mine Ntronang: closed mine Teberebie: orebody under development...post-schistose auriferous arsenopyrite, Ashanti mine. (Width of microphotograph represents 1.4 mm). $1...with gold-bearing arsenopyrite crystals, Ashanti mine min et al. 1988) consider that both the disseminated-sulphide...less than 1 cm from the quartz in Fig. 5. Tarkwa mine. (Width of microphotograph represents 0.15 mm) |  | | Journal (article/letter/editorial) | | deposit A polymorph type in the Early Proterozoic of Mali (West Africa) A. Dommanget 1, J.P. Mil~si 1, and...Nationale de la G6ologieet des Mines, B.P. 223, Bamako, Mali Received: April 2, 1991/Accepted: June 3, 1992 Abstract...Proterozoic Birimian Formation, in the K6ni6ba region of SW Mali. Early work showed reserves in the Loulo-0...is not high in Mali (2500 kg in 1989), and mostly comes from the underground Kalana mine (in operation...operation since 1986), the Syama mine (opened in 1990) and small 'cottage' operations. Two areas, at Kangaba (left |  | | Journal (article/letter/editorial) | | a number of deposits in Ghana, Burkina Faso and Mali that formed before the Eburnean Orogeny during a...Mauritania), mineral sands, iron ore (e.g., Nioro in Mali and Sassandra in Cote d'Ivoire), aluminium ore (e...Pipe in Sierra Leone) and gold (e.g., Yatela in Mali) (Markwitz et al., 2015; and references therein)...including mafic-intermediate volcanics (e.g., Syama in Mali), granitoids (e.g., Dokrupe in Ghana: Yao et...al., in press — this volume); Kalana in southern Mali; Sabodala in the KKI of Senegal; Bepkong in north-western |  | Lawrence, D.M., Allibone, A.H., Chang, Z., Meffre, S., Lambert-Smith, J.S., Treloar, P.J. (2017) The Tongon Au Deposit, Northern Côte d’Ivoire: An Example of Paleoproterozoic Au Skarn Mineralization☼. Economic Geology, 112 (7) 1571-1593 doi:10.5382/econgeo.2017.4522 | Journal (article/letter/editorial) | | Au mineralization in southwest Ghana and western Mali. Dating provides further evidence that Au mineralization...the Boundiali belt 80 km to the west, with the Syama Au deposit located on its western margin (Olson...major curved reverse faults during a period of region-wide contractional deformation (e.g., Twiss and...Burkina Faso 10° N1140000N Sierra Leone 240000E Mali 4° W 200000E 180000E 14° N Senegal 8° W 220000E...Burkina Faso Border Nogbele pluton N Guinea Mali Border 0 Côte d'Ivoire Liberia Abidjan 250 |  | McFarlane, C. R. M., Mavrogenes, J., Lentz, D., King, K., Allibone, A., Holcombe, R. (2011) Geology and Intrusion-Related Affinity of the Morila Gold Mine, Southeast Mali. Economic Geology, 106 (5) 727-750 doi:10.2113/econgeo.106.5.727 | Journal (article/letter/editorial) | | Intrusion-Related Affinity of the Morila Gold Mine, Southeast Mali CHRISTOPHER R.M. MCFARLANE,1,† JOHN MAVROGENES...gold mine, hosted within Paleoproterozoic Birimian volcano-sedimentary rocks of southeast Mali, is spatially...characteristic of intrusion-related gold deposits globally. Mine Geology Morila is located approximately 200 km southeast...by large granitoid batholiths (Figs. 1, 2). The region is characterized by a thick subtropical weathering...Niamey Morila Burkina Faso BSZ Ouagadougou Mali Guinea 10° Sierra Leone Archean Man (Liberian) |  | GUEYE, M., VAN DEN KERKHOF, A. M., HEIN, U. F., DIENE, M., MUCKE, A., SIEGESMUND, S. (2013) STRUCTURAL CONTROL, FLUID INCLUSIONS AND CATHODOLUMINESCENCE STUDIES OF BIRIMIAN GOLD-BEARING QUARTZ VEIN SYSTEMS IN THE PALEOPROTEROZOIC MAKO BELT, SOUTHEASTERN SENEGAL. South African Journal of Geology, 116 (2) 199-218 doi:10.2113/gssajg.116.2.199 | Journal (article/letter/editorial) | | peridotites; 3 -andesites, dacites, tuff, volcanic breccia; 4 -andesites; 5 -ortoamphibolite; 6 -basaltic...16 -intrusive rocks. Sample locations: Sabodala mine (Sabmine); Sabodala south (SabS); Bambaraya (B4);...Sabodala, the largest, currently operational gold mine in Senegal. The structural setting, mineralisation...large-scale transcurrent shear zones like the Senegal-Mali shear zone are spatially associated, suggesting...Senegal-Mali shear zone includes the Loulo and Sadiola districts in western and northern Mali being one |  | Masurel, Quentin, Thébaud, Nicolas, Miller, John, Ulrich, Stanislav, Hein, Kim A.A., Cameron, Greg, Béziat, Didier, Bruguier, Olivier, Davis, James A. (2017) Sadiola Hill: A World-Class Carbonate-Hosted Gold Deposit in Mali, West Africa. Economic Geology, 112 (1) 23-47 doi:10.2113/econgeo.112.1.23 | Journal (article/letter/editorial) | | Hill: A World-Class Carbonate-Hosted Gold Deposit in Mali, West Africa* Quentin Masurel,1,† Nicolas Thébaud...rocks that crop out in eastern Senegal and western Mali. The geology of the inlier differs from other Paleoproterozoic...within 3 km of the Senegal-Mali shear zone, and country rocks in the region have undergone polycyclic...transcurrent tectonics, after the cessation of region-wide compressional deformation. The high-temperature...hydrothermal fluid circulation along the Senegal-Mali shear zone. Introduction The Paleoproterozoic terranes |  | Le Mignot, Elodie, Reisberg, Laurie, André-Mayer, Anne-Sylvie, Bourassa, Yan, Fontaine, Arnaud, Miller, John (2017) Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton. Economic Geology, 112 (1) 145-168 doi:10.2113/econgeo.112.1.145 | Journal (article/letter/editorial) | | production of Ghana, which was the main gold-producing region in Africa before the discovery of the Witwatersrand...Inata Yatela Sadiola SENEGAL Loulo MALI Siguiri GUINEA Syama Kiaka Poura HO BO Fig.4A Gaoua...completed a new 1:50,000 litho-structural map of this region (Fig. 2) based on interpretation of high-resolution...Taoudeni basin Basalts and gabbros (pillow lavas) Breccia Ultrabasic rocks Fig. 2. (Cont.) primarily to...to be Eoeburnean, and to have affected the Gaoua region from ~2170 to 2140 Ma (Baratoux et al., Table |  | Le Mignot, Elodie, Siebenaller, Luc, Béziat, Didier, André-Mayer, Anne-Sylvie, Reisberg, Laurie, Salvi, Stefano, Velasquez, Germán, Zimmermann, Catherine, Naré, Athanase, Franceschi, Guy (2017) The Paleoproterozoic Copper-Gold Deposits of the Gaoua District, Burkina Faso: Superposition of Orogenic Gold on a Porphyry Copper Occurrence?. Economic Geology, 112 (1) 99-122 doi:10.2113/econgeo.112.1.99 | Journal (article/letter/editorial) | | chalcopyrite, is typically observed in hydrothermal breccia and is associated with early arsenic-poor and gold-free...zones that crosscut the host rocks and copper-rich breccia. Therefore, our data indicate the strongly deformed...such as auriferous tourmalinites (e.g., Loulo in Mali), Fe(-Cu) deposits (e.g., Falémé in Sénégal) or...gold-bearing sulfide mineralization (e.g., Syama in Mali) and gold paleoplacers (referred to as Tarkwaian...al., 2011) and Loulo (Lawrence et al., 2013) in Mali. This paper presents results obtained during the |  | Lambert-Smith, James S., Allibone, Andrew, Treloar, Peter J., Lawrence, David M., Boyce, Adrian J., Fanning, Mark (2020) Stable C, O, and S Isotope Record of Magmatic-Hydrothermal Interactions Between the Falémé Fe Skarn and the Loulo Au Systems in Western Mali. Economic Geology, 115 (7). 1537-1558 doi:10.5382/econgeo.4759 | Journal (article/letter/editorial) | | Falémé Fe Skarn and the Loulo Au Systems in Western Mali James S. Lambert-Smith,1,† Andrew Allibone,2 Peter...district in the KédougouKéniéba inlier in western Mali and eastern Senegal is one of the most richly endowed...District Morila Mana district, Wona, Kona 12º Syama Siguiri Tongon Kalana Post-Paleoproterozoic rocks...of being separated by a terrane boundary (Senegal-Mali shear zone), which reopens the possibility that...FALÉMÉ Fe SKARN AND THE LOULO Au SYSTEMS, WESTERN MALI 1450N 5 km UTM 29N Gara RG10050 Balangouma Pluton |  | | Book | | in a given period, the geographic status of the region, the extent of technological development, and other...universally later (1979, 1987)) postulates a broad source region for ore fluids and metals in deeper parts of the...tabular to linear, and in form from disseminated, to breccia, to stockwork or sheeted veinlet zones, to single...of typical laddered ribbon veins in the Hollinger mine, Timmins, Ontario. (A): Stippled (1) early, tourmalinebearing...extensional veins in conglomerate in the Hollinger mine (e.g., Figure 34 in Poulsen et al., 2000) appear |  | | Journal (issue) | | makes major capex investments in South Carolina gold mine and mill..........................................WORLD U.S. & Canada: Hecla Ramping Up Lucky Friday Mine to Full Production...........8 Latin America: Fruta...E&MJ to see the investments being made at the Haile mine and mill in South Carolina. On the cover, another...730E-10 is assembled at the laydown yard at the Haile mine. (Photo: OceanaGold) DEPARTMENTS Calendar.......note that in 2010, Nevada Copper’s Pumpkin Hollow mine was at the feasibility stage; Hecla was exploring |  | Fougerouse, Denis, Micklethwaite, Steven, Ulrich, Stanislav, Miller, John, Godel, Bélinda, Adams, David T., McCuaig, T. Campbell (2017) Evidence for Two Stages of Mineralization in West Africa’s Largest Gold Deposit: Obuasi, Ghana. Economic Geology, 112 (1) 3-22 doi:10.2113/econgeo.112.1.3 | Journal (article/letter/editorial) | | volcanic rocks Obuasi mine B Sibi su 6º08N A’ Gyabunsu Sansu Gold mine Main thrust faults s...made available by more than 10 years of additional mine development since the last study (Allibone et al...Allibone et al., 2002). The oldest rocks in the Obuasi region of southwestern Ghana consist of the Sefwi Group...exposures were selected on the basis of discussions with mine geologists, as well as from interpretation of three-dimensional...availability of active headings. Most active areas of the mine were studied, including the Block 1, Block 2, Block |  | | Journal (article/letter/editorial) | | terranes. The granitoids from the Sadiola-Yatela region display a temporal evolution from ca. 21402080...2115-2060 Ma) granitoids in the Sadiola-Yatela region are characterised by negative Nb-Ta anomalies,...recorded in sedimentary and magmatic rocks of the region includes a period of early convergence (D1s), followed...(D3s-D4s). The bulk of the gold mineralisation in the region occurred during D3s, with sinistral displacement...the study of igneous rocks in that gold-endowed region appears critical not only to the unravelling of |  | | Journal (article/letter/editorial) | | are known from Guinea, Sierra Leone, Liberia, and Mali on the West African Craton (Fig. 1). There are,...Lamproitic Ckc-a @iammdifemus) 1 2 3 4 5 Keni&(Mali) Barwlroro (Guinea) Koidu (SimsLmnc) Sample Crc&...closest to original melt compositions), mostly from mine workings at Koidu (Fig. I ), have been selected...other localities on the West African Craton (Guinea, Mali), and where possible, with kimberlites and related-rocks...accompanied by continental tholeiite magmatism in southern Mali, Liberia, and eastern Guinea (BERTRAND, 1991). A |  | Gunn, A.G., Dorbor, J.K., Mankelow, J.M., Lusty, P.A.J., Deady, E.A., Shaw, R.A., Goodenough, K.M. (2018) A review of the mineral potential of Liberia. Ore Geology Reviews, 101. 413-431 doi:10.1016/j.oregeorev.2018.07.021 | Journal (article/letter/editorial) | | of iron ore is currently restricted to a single mine, Yekepa, in the Nimba Range. Other important deposits...1500 km, from Senegal, Guinea, Sierra Leone and Mali in the west to Ghana and Niger in the east. The...rocks form linear greenstone belts throughout the region. On the basis of field relationships, the Archaean...deposits are located in greenstone belts in Ghana, Mali, Senegal, Niger, Burkina Faso and Côte d’Ivoire...Africa, notably in Guinea, Sierra Leone, Ghana and Mali. In 2015 Guinea was the sixth largest bauxite producer |  | Lawrence, D. M., Treloar, P. J., Rankin, A. H., Boyce, A., Harbidge, P. (2013) A Fluid Inclusion and Stable Isotope Study at the Loulo Mining District, Mali, West Africa: Implications for Multifluid Sources in the Generation of Orogenic Gold Deposits. Economic Geology, 108 (2) 229-257 doi:10.2113/econgeo.108.2.229 | Journal (article/letter/editorial) | | Stable Isotope Study at the Loulo Mining District, Mali, West Africa: Implications for Multifluid Sources...Moz resource), in the Birimian terrane of western Mali, contains a range of mineralogically diverse styles...metamorphic fluids, a “salting out effect”). Introduction MALI is the second leading gold producing country in...African craton (inset Fig. 1). In southern Mali, the Morila, Syama, and Kalana deposits are situated within...in southwest Mali. This highly gold productive/prospective region is known as the west Mali gold belt, |  | | Book | | metallic deposits in Morocco, Algeria, Tunisia, Mali, Mauritania, Egypt, Sudan, and Eritrea. Originally...the setting and origin of major deposits in the region, together with information on tonnages and grades...reduced granitoid-hosted gold mineralization in Mali, and present fluid inclusion and stable isotope...comparisons and contrasts with MVT deposits in the region. The last part is focused on sediment-hosted iron...Rare-Metal Deposits A Review of Gold Mineralization in Mali . . . . . . . . . . . . . . . . . . 327 David M |
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