The geology and mineralogy of the loulo mining district, Mali, West Africa: Evidence for two distinct styles of orogenic gold mineralization

Economic Geology

Volumn 108, Issue 2, 2013, Pages 199-227

  Lawrence, David M ^a,b   Treloar, Peter J ^a   Rankin, Andrew H ^a   Harbidge, Paul ^b   Holliday, Joel ^b  

^a KINGSTON UNIVERSITY   (United Kingdom)

^b Randgold Resources Ltd   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ALBITIZATION; BASE METALS; DEPOSITON; FLUID SOURCES; GEOLOGIC CHARACTERISTICS; GERSDORFFITE; GOLD MINERALIZATION; HOST ROCKS; HYDROTHERMAL SYSTEM; MINERAL ASSEMBLAGE; MINING DISTRICT; MULTI-STAGE; OREBODIES; OROGENIC GOLD; OROGENIC GOLD DEPOSITS; POLYMETALLIC; POST-MINERALIZATION; REGIONAL METAMORPHISMS; ROCK TYPES; SHEAR ZONE; WEST AFRICA; XENOTIME;

CARBON DIOXIDE; COPPER COMPOUNDS; CRYSTALLOGRAPHY; DEPOSITS; ECONOMIC GEOLOGY; GOLD; IRON OXIDES; MINERALOGY; MONAZITE DEPOSITS; PETROLOGY; PHOSPHATE MINERALS; QUARTZ; SILICATE MINERALS; SULFIDE MINERALS; TUNGSTATE MINERALS;

GOLD DEPOSITS;

ALBITIZATION; GOLD; MINERALIZATION; MINERALOGY; ORE BODY; OROGENY; PARAGENESIS; REGIONAL METAMORPHISM; SHEAR ZONE; TOURMALINE; VEIN (GEOLOGY); WALL ROCK;

GHANA; MALI;

EID: 84874517131     PISSN: 03610128     EISSN: None     Source Type: Journal    
DOI: 10.2113/econgeo.108.2.199     Document Type: Article

References (95)

1. Abouchami, W., Boher, M., Michard, A., and Albarede, F., 1990, A major 2.1 Ga event of mafic magmatism in West Africa: An early stage of crustal accretion: Journal of Geophysical Research, v. 95, p. 17,605-17,629
2. Allibone, A., Teasdale, J., Cameron, G., Etheridge, M., Uttley, P., Soboh, A., Appiah-Kubi, J., Adanu, A., Arthur, R., Mamphey, J., Odoom, B., Zuta, J., Tsikata, A., Pataye, F., Famiyeh, S., and Lamb, E., 2002a, Timing and structural controls on gold mineralization at the Bogoso gold mine, Ghana, West Africa: ECONOMIC GEOLOGY, v. 97, p. 949-969
3. Allibone, A., McCuaig, T.C., Harris, D., Etheridge, M., Munroe, S., Byrne, D., Ammanor, J., and Gyapong, W., 2002b, Structural controls on gold mineralization at the Ashanti deposit, Obuasi, Ghana: Society of Economic Geologists Special Publication 9, p. 65-92
4. ArcelorMittal, 2007, Press release, Arcelor Mittal signs agreement to develop iron ore mining in Senegal (http://www.arcelormittal.com/index.php?lang= en&page=49&tb0=76&tblng=1)
5. Bassot, J.P., 1987, Le complexe volcano-plutonique calcoalcalin de la rivère Dalema (Est Sénegal): discussion de sa signification géodynamique dans le cadre de I'orogénie eburnéene (Protérozoic inférieur): Journal of African Earth Science, v. 6, p. 505-519
6. 1997, Albitisations dnas le Paleoproterozoic de L'Est Senegal: relations avec les mineralisations ferriferes de la rive gauche de la Falémé : Journal of African Earth Sciences, v. 25, p. 353-367
7. Bassot, J.P., and Caen-Vachette, M., 1984, Données géochronologiques et géochimiques nouvelles sur les granitodes de l'Est du Sénégal: implications sur l'histoire geologique du Birrimien de cette region, in Klerkx, J., and Michot, J., eds., African geology: Belgium, Tervuren, p. 196-209
8. Bassot, J.P., and Dommanget, A., 1986, Mise en évidence d'un accident majeur affectant le Protérozoïque inférieur des confins sénégalo-maliens: Comptes Rendus de I'Academie des Sciences, v. 302, p. 1101-1106
9. Bastrakov, E.N., Skirrow, R.G., and Davidson, B., 2007, Fluid evolution and origin of iron oxide Cu-Au prospects in the Olympic Dam district, Gawler craton, South Australia: ECONOMIC GEOLOGY, v. 102, p. 1415-1440
10. Béziat, D., Bourges, F., Debat, P., Fuchs, Y., and Lompo, M., 1999, The Guibaré and Fété Kolé gold-bearing tourmaline-quartz veins in the Birimian greenstone belts of Burkina Faso: The Canadian Mineralogist, v. 37, p. 575-591
11. Béziat, D., Dubois, M., Debat, P., Nikiéma, S., Salvi, S., and Tollon, F., 2008, Gold metallogeny in the Birimian craton of Burkina Faso (West Africa): Journal of African Earth Sciences, v. 50, p. 215-233
12. Bierlein, F.P., and Crowe, D.E., 2000, Phanerzoic orogenic lode gold deposits: Reviews in Economic Geology, v. 13, p. 103-139
13. Boher, M., 1991, Croissance crustale en Afrique de I'Ouest a 2.1 Ga apport de la geochimie isotopique. Unpublished Ph.D thesis, France, University of Nancy, 180 p
14. Boher, M., Abouchami, W., Michard, A., Albarede, F., and Arndt, N.T., 1992, Crustal growth in West Africa at 2.1 Ga: Journal of Geophysical Research, v. 97, p. 345-369
15. Burrows, D.R., and Spooner, E.T.C., 1989, Relationships between Archean gold vein-shear zone mineralisation and igneous intrusions in the Val d'Or and Timmins areas, Abitibi Subprovince, Canada: ECONOMIC GEOLOGY MONOGRAPH 6, p. 424-444
16. Burrows, D.R., Spooner, E.T.C., Wood, P.C., and Jemielita, R.A., 1993, Structural controls on formation of the Hollinger-Melntyre Au quartz vein system in the Hollinger shear zone, Timmins, Southern Abitibi greenstone belt, Ontario: ECONOMIC GEOLOGY, v. 88, p. 1643-1663
17. Cameron, E.M., and Hattori, K., 1987, Archean gold mineralization and oxidized hydrothermal fluids: ECONOMIC GEOLOGY, v. 82, p. 1177-1191
18. Cathelineau, M., 1988, Cation site occupancy in chlorides and illites as a function of temperature: Clay Minerals, v. 23, p. 471-485
19. Cathelineau, M., and Nieva, D., 1985, A chlorite solid solution geothermometer: the Los Azufres geothermal system (Mexico): Contributions to Mineralogy and Petrology, v. 91, p. 235-244
20. Couture, J-F., and Pilote, P., 1993, The geology and alteration patterns of a disseminated shear zone-hosted mesothermal gold deposit: The Francoeur 3 deposit, Rouyn-Noranda, Quebec: ECONOMIC GEOLOGY, v. 88, p. 1664-1684
21. Couture, J-F., Pilote, P., and Desrochers, J-P., 1994, Timing of gold mineralization in the Val-d'Or district, Southern Abitibi belt: Evidence for two distinct mineralizing events: ECONOMIC GEOLOGY, v. 89, p. 1542-1551
22. Dabo, M., and Aïfa, T., 2010, Structural styles and tectonic evolution of the Kolia-Boboti sedimentary basin, Kédougou- Kéniéba Inlier, eastern Senegal: Comptes Rendus Geoscience, v. 342, p. 796-805
23. 2011, Late Eburnean deformation in the Kolia-Boboti sedimentary basin, Kédougou-Kéniéba inlier, Sénégal: Journal of African Earth Sciences, v. 60, p. 106-116
24. Dallmeyer, R.D., and Lécorché, J.P., 1991, The West African orogens and circum-Atlantic Correlatives: Berlin, Springer-Verlag, 405 p
25. de Ronde, C.E.J., Faure, K., Bray, C.J., and Whitford, D.J., 2000, Round Hill shear zone-hosted gold deposit, Macraes flat, Otago, New Zealand: Evidence of a magmatic ore fluid: ECONOMIC GEOLOGY, v. 95, p. 1025-1048
26. Dia, A., 1988, Caractéres et signification des complexes magmatiques et métamorphiques du secteur de Sandikounda- Laminia (Nord de la boutonniére de Kédougou; Est du Sénégal): un modéle géodynamique du Birimien de l'Afrique de l'Ouest: Unpublished Ph.D. thesis, Sénégal, Universite de Dakar, 350 p
27. Dia, A., Van Schmus, W.R., and Kröner, A., 1997, Isotopic constraints on the age and formation of a Palaeoproterozoic volcanic arc complex in the Kédougou inlier, eastern Senegal, West Africa: Journal of African Earth Sciences, v. 24, p. 197-213
28. Dioh, E., Béziat, D., Debat, P., Grégoire, M., and Ngom, P.M., 2006, Diversity of the Palaeoproterozoic granitoids of the Kédougou inlier (eastern Senegal): Petrographical and geochemical constraints: Journal of African Earth Sciences, v. 44, p. 351-371
29. Dommanget, A., Milési, J.P., and Diallo, M., 1993, The Loulo gold and tourmaline- bearing deposit: Mineralium Deposita, v. 28, p. 253-263
30. Feybesse, J., Billa, M., Guerrot, C., Duguey, E., Lescuyer, J., Milési, J.P., and Bouchot, V., 2006, The Paleoproterozoic Ghanaian province: Geodynamic model and ore controls, including regional stress modelling: Precambrian Research, v. 149, p. 149-196
31. Fouillac, A.M., Dommanget, A., and Milési, J.P., 1993, A carbon, oxygen, hydrogen and sulfur isotopic study of the gold mineralization at Loulo, Mali: Chemical Geology, v. 106, p. 47-62
32. Garda, G.M., Trumbull, R.B., Beljavskis, P., and Wiedenbeck, M., 2009, Boron isotope composition of tourmalinite and vein tourmalines associated with gold mineralization, Serra do Itaberaba Group, central Ribeira belt, SE Brazil: Chemical Geology, v. 264, p. 207-220
33. Goldfarb, R.J., Groves, D.I., and Gardoll, S., 2001, Orogenic gold and geologic time: A global synthesis: Ore Geology Reviews, v. 18, p. 1-75
34. Goldfarb, R.J., Baker, T., Dube, B., Groves, D.I., Hart, C.J.R., and Gosselin, P., 2005, Distribution, character, and genesis of gold deposits in metamorphic terranes: ECONOMIC GEOLOGY 100TH ANNIVERSARY VOLUME, p. 407-450
35. Groves, D.I., Barley, M.E., Barnicoat, A.C., CassidY, K.F., Fare, R.J., Hagemann, S.G., Ho, S.E., Hronsky, J.M.A., Mikucki, E.J., Mueller, A.G., Mc- Naughton, N.J., Perring, C.S., Ridley, J.R., and Vearncombe, J.R., 1992, Sub-greenschist to granulite-hosted Archean lode-gold deposits of the Yilgarn craton: A depositional continuum from deep sourced hydrothermal fluids in crustal-scale plumbing systems: University of Western Australia Special Publications, v. 22, p. 325-338
36. Groves, D.I., Goldfarb, R.J., Gebre-Mariam, M., Hagemann, S.G., and Robert, F., 1998, Orogenic gold deposits: A proposed classification in the context of their crustal distribution and relationship to other gold deposit types: Ore Geology Reviews, v. 13, p. 7-27
37. Groves, D.I., Goldfarb, R.J., Knox-Robinson, C.M., Ojala, J., Gardoll, S., Yun, G.Y., and Holyland, P., 2000, Late-kinematic timing of orogenic gold deposits and significance for computer-based exploration techniques with emphasis on the Yilgarn Block, Western Australia: Ore Geology Reviews, v. 17, p. 1-38
38. Gueye, M., Siegesmund, S., Wemmer, K., Pawlig, S., Drobe, M., Nolte, N., and Layer, P., 2007, New evidence for an early Birimian evolution in the West African craton: an example from the Kédougou-Kéniéba inlier, southeast Senegal: South African Journal of Geology, v. 110, p. 511-534
39. Gueye, M., Ngom, P.M., Diene, M., Thiam, Y., Siegesmund, S., Wemmer, K., and Pawlig, S., 2008, Intrusive rocks and tectno-metamorphic evolution of the Mako Paleoproterozoic belt (Eastern Senegal, West Africa): Journal of African Earth Sciences, v. 50, p. 88-110
40. Hawthorne, F.C., and Henry, D.J., 1999, Classification of the minerals of the tourmaline group: European Journal of Mineralogy, v. 11, p. 201-215
41. Hein, K.A., Morel, V., Kagone, O., Kiemde, F., and Mayes, K., 2004, Birimian lithological succession and structural evolution in the Goren segment of the Boromo-Goren greenstone belt, Burkina Faso: Journal of African Earth Sciences, v. 39, p. 1-23
42. Henry, D.J., and Guidotti, C.V., 1985, Tourmaline as a petrogenetic indicator mineral- an example from the staurolite-grade metapelites of NW Maine: American Mineralogist, v. 70, p. 1-15
43. Hey, M.H., 1954, A new review of the chlorites: Mineralogical Magazine, v. 30, p. 277-292
44. Hirdes, W., and Davis, D.W., 2002, U-Pb Geochronology of Paleoproterozoic rocks in the southern part of the Kédougou-Kéniéba inlier, Senegal, West Africa: Evidence for diachronous accretionary development of the Eburnean Province: Precambrian Research, v. 118, p. 83-99
45. Jia, Y., Kerrich, R., and Goldfarb, R., 2003, Metamorphic origin of ore-forming fluids for orogenic gold-bearing quartz vein systems in the North American Cordillera: Constraints from a reconnaissance study of δ15N, δD, and δ18O: ECONOMIC GEOLOGY, v. 98, p. 109-123
46. Klemd, R., and Ott, S., 1997, Compositional characteristics of fluid inclusions as exploration tool for Au-mineralization at Larafella, Burkina Faso: Journal of Geochemical Exploration, v. 59, p. 251-258
47. Kranidiotis, P., and MaClean, W.H., 1987, Systematics of chloride alteration at the Phelps Dodge massive sulfide deposit, Matagami, Quebec: ECONOMIC GEOLOGY, v. 82, p. 1898-1911
48. Kretschmar, U., and Scott, S.D., 1976, Phase relations involving arsenopyrite in the system Fe-As-S and their application: Canadian Mineralogy, v. 14, p. 364-386
49. Lang, J.R., Stanley, C.R., Thompson, J.F.H., and Dunne, K.P.E., 1995, Na- K-Ca magmatic hydrothermal alteration in alkali porphyry Cu-Au deposits, British Columbia, in Thompson, J.F.H., ed., Magmas, fluids and ore deposits: Mineralogical Association of Canada, Short Course v. 23, p. 339-366
50. Large, R.R., Bull, S.W., and Maslennikov, V.V., 2011, A carbonaceous sedimentary source-rock model for Carlin-type and orogenic gold deposits: ECONOMIC GEOLOGY, v. 106, p. 331-358
51. Lawrence, D.M., 2010, Characterisation and evolution of Au mineralization in the Loulo mining district, Western Mali: Unpublished Ph.D. thesis, London, Kingston University, 341 p
52. Lawrence, D.M., Treloar, P.J., Rankin, A.H., Boyce, A., and 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, v. 107, p. 229-257
53. Ledru, P., Pons, J., Feybesse, J.L., Dommanget, A., Johan, V., Diallo, M., and Vinchon, C., 1989, Tectonique transcurrente et évolution polycyclique dans le Birimien, Protérozoïque inférieur du Sénégal-Mali (Afrique de I'Ouest): Comptes Rendus de l'Académie des Sciences, Series II, v. 308, p. 117-122
54. Ledru, P., Pons, J., Milési, J.P., Feybesse, J.L., and Johan, V., 1991, Transcurrent tectonics and polycyclic evolution in the Lower Proterozoic of Senegal- Mali: Precambrian Research, v. 50, p. 337-354
55. Lee, P., and Parsons, I., 1997, Dislocation formation and albitization in alkali feldspars from the Shap granite: American Mineralogist, v. 82, p. 557-570
56. Lerouge, C., Milési, J.P., and Fouillac, A.M., 1999, The Palaeoproterozoic Dorlin gold deposit, French Guiana: genetic constraints of stable isotope geochemistry: Chemical Geology, v. 155, p. 131-149
57. Leube, A., Hirdes, W., Mauer, R., and Kesse, G.O., 1990, The early Proterozoic Birimian Supergroup of Ghana and some aspects of its associated gold mineralization: Precambrian Research, v. 46, p. 139-165
58. London, D., Morgan, G.B., and Wolf, M.B., 1996, Boron in granitic rocks and their contact aureoles, in Grew, E.S., and Anovitz, L.M., eds., Boron: mineralogy, petrology and geochemistry: Reviews in Mineralogy, Mineralogical Society of America, v. 33, p. 229-330
59. Marschall, H.R., and Jiang, S-Y., 2011, Tourmaline isotopes: No elements left behind: Elements, v. 7, p. 313-319
60. Marschik, R., and Fontboté, L., 2001, The Candelaria-Punta del Cobre iron oxide Cu-Au(-Zn-Ag) deposits, Chile: ECONOMIC GEOLOGY, v. 96, p. 1799-1826
61. Milési, J.P., Feybesse, J.L., Ledru, P., Dommanget, A., Ouedrago, M., Marcoux, E., Prost, A., Vinchon, C., Sylvain, J.P., Johan, V., Tegyey, M., Calvez, J.Y., and Lagny, P., 1989, West African gold deposits in their Lower Proterozoic lithostructural setting: Chronique de la Recherche Miniere, v. 497, p. 3-98
62. Milési, J.P., Ledru, P., Feybesse, J., Dommanget, A., and Marcoux, E., 1992, Early Proterozoic ore deposits and tectonics of the Birimian orogenic belt, West Africa: Precambrian Research, v. 58, p. 305-344
63. Morasse, S., Wasteneys, H.A., Cormier, M., Helmstaedt, H., and Mason, R., 1995, A pre-2686 Ma intrusion-related gold deposit at the Kiena mine, Val d'Or, Québec, Southern Abitibi subprovince: ECONOMIC GEOLOGY, v. 90, p. 1310-1321
64. Mumin, A.H., and Fleet, M.E., 1995, Evolution of gold mineralisation in the Ashanti gold belt, Ghana: Evidence from carbonate compositions and paragenesis: Mineralogy and Petrology, v. 55, p. 26-280
65. Mumin, A.H., Fleet, M.E., and Chryssoulis, S.L., 1994, Gold mineralization in As-rich mesothermal gold ores of the Bogosu-Prestea mining district of the Ashanti gold belt, Ghana: Remobilization of " invisible" gold: Mineralium Deposita, v. 29, p. 445-460
66. Mumin, A.H., Fleet, M.E., and Longstaffe, F.J., 1996, Evolution of hydrothermal fluids in the Ashanti gold belt, Ghana; stable isotope geochemistry of carbonates, graphite, and quartz: ECONOMIC GEOLOGY, v. 91, p. 135-148
67. Ndiaye, P.M., Dia, A., Vialette, Y., Diallo, D.P., Ngom, P.M., Sylla, M., Wade, S., and Dioh, E., 1997, Données pétrographiques, géochimiques et géochronologiques nouvelles sur les granitoïdes du Paléoprotérozoïque du Supergroupe de Dialé-Daléma (Sénégal Oriental): implications pétrogénétiques et géodynamiques: Journal of African Earth Sciences, v. 25, p. 193-208
68. Oberthür, T., Vetter, U., Schmidt Mumm, A., Weiser, T., Amanor, J.A., Gyapong, W.A., Kumi, R., and Bleckinsop, T.G., 1994, The Ashanti gold mine at Obuasi in Ghana: Geologische Jahrbuch, v. D100, p. 31-129
69. Oberthür, T., Schmidt Mumm, A., Vetter, U., Simon, K., and Amanor, J.A., 1996, Gold mineralization in the Ashanti Belt of Ghana: Genetic constraints of the stable isotope geochemistry: ECONOMIC GEOLOGY, v. 91, p. 289-301
70. Olivo, G.R., and Williams-Jones, A.E., 2002, Genesis of the auriferous C quartz-tourmaline vein of the Siscoe mine, Val d'Or district, Abitibi subprovince, Canada: Structural, mineralogical and fluid inclusion constraints: ECONOMIC GEOLOGY, v. 97, p. 929-947
71. Olivo, G.R., Chang, F., and Kyser, T.K., 2006, Formation of the auriferous and barren North Dipper veins in the Sigma mine, Val d'Or, Canada: Constraints from structural, mineralogical, fluid inclusion and isotopic data: ECONOMIC GEOLOGY, v. 101, p. 607-631
72. Pawlig, S., Gueye, M., Klisches, R., Schwarz, S., Wemmer, K., and Siegesmund, S., 2006, Geochemical and Sr-Nd isotopic data on the Birimian of the Kedougou-Kenieba Inlier (Eastern Senegal): Implications on the Palaeoproterozoic evolution of the West African Craton: South African Journal of Geology, v. 109, p. 411-427
73. Perello, J.A., Fleming, J.A., O'Kane, K.P., Burt, P.D., Clarke, G.A., Himes, M.D., and Reeves, A.T., 1995, Porphyry copper-gold-molybdenum deposits in the Island Copper cluster, northern Vancouver Island, British Columbia, in Schroeter, T.G., ed., Porphyry deposits of the Northwestern Cordillera of North America: Canadian Institute of Mining, Metallurgy and Petroleum, v. 46, p. 214-238
74. Pettke, T., Diamond, L.W., and Kramers, J.D., 2000, Mesothermal gold lodes in the north-western Alps: A review of genetic constraints from radiogenic isotopes: European Journal of Mineralogy, v. 12, p. 213-230
75. Pitcairn, I.K., Teagle, D.A., Craw, G.R., Olivo, G.R., Kerrich, R., and Brewer, T.S., 2006, Sources of metals and fluids in orogenic gold deposits: Insights from the Otago and Alpine Schists, New Zealand: ECONOMIC GEOLOGY, v. 101, p. 1525-1546
76. Pons, J., Oudin, O.C., and Valero, J., 1992, Kinematics of large syn-orogenic intrusions: example of the Lower Proterozoic Saraya batholith (Eastern Senegal): Geologische Rundschau, v. 81, p. 473-486
77. Powell, R., Will, T.M., and Phillips, G.N., 1991, Metamorphism in Archean greenstone belts: Calculated fluid compositions and implications for gold mineralization: Journal of Metamorphic Geology, v. 9, p. 141-150
78. Randgold Resources Ltd, 2011, Annual Report (http://www. randgoldresources.com/randgold/applications/randgold/templates/ annual-report-2011/downloads/Annual%20Report%202011.pdf)
79. Ridley, J.R., and Diamond, L.W., 2000, Fluid chemistry of orogenic lode gold deposits and implications for genetic models: Reviews in Economic Geology, v. 13, p. 141-162
80. Robert, F., 2001, Syenite-associated disseminated gold deposits in the Abitibi greenstone belt, Canada: Mineralium Deposita, v. 36, p. 503-516
81. Robert, F., and Brown, A.C., 1986, Archean gold-bearing quartz veins at the Sigma mine, Abitibi greenstone belt, Quebec: Part II. Vein paragenesis and hydrothermal alteration: ECONOMIC GEOLOGY, v. 81, p. 593-616
82. Schwartz, M.O., and Melcher, F., 2004, The Falémé iron district, Senegal: ECONOMIC GEOLOGY, v. 99. p. 917-939
83. Sharp, Z.D., Essene, E.J., and Kelly, W.C., 1985, A re-examination of the arsenopyrite geothermometer: pressure consideration and applications to natural assemblages: Canadian Mineralogy, v. 23, p. 517-534
84. Sibson, R.H., 2001, Seismogenic framework for hydrothermal transport and ore deposition: Society of Economic Geology Reviews, v. 14, p. 25-50
85. Slack, J.F., 1996, Tourmaline association with hydrothermal ore deposits, in Grew, E.S., and Anovitz, L.M., eds., Boron: mineralogy, petrology and geochemistry: Mineralogical Society of America, Reviews in Mineralogy, v. 33, p. 559-643
86. Slack, J.F., Palmer, M.R., Stevens, B.B.J., and Barnes, R.G., 1993, Origin and significance of tourmaline-rich rocks in the Broken Hill district, Australia: ECONOMIC GEOLOGY, v. 88, p. 505-541
87. Smith, M.P., and Yardley, B.W.D., 1996, The boron isotopic composition of tourmaline as a guide to fluid processes in the southwestern England ore field: An ion microprobe study: Geochimica et Cosmochimica Acta, v. 60, p. 1415-1427
88. Vial, D.S., Duarte, B.P., Fuzikawa, K., and Vieira, M.B.H., 2007, An epigenetic origin for the Passagem de Mariana gold deposit, Quadrilátero Ferrífero, Minas Gerais, Brazil: Ore Geology Reviews, v. 32, p. 596-613
89. Villeneuve, M., 2008, Review of the orogenic belts on the western side of the West African Craton: the Bassarides, Rokelides and Mauritanides, in Ennih, N., and Liégeois, J.P., eds., The boundaries of the West African craton: Geological Society of London Special Publication 297, p. 169-201
90. Villeneuve, M., and Cornée, J.J., 1994, Structure, evolution and paleoceanography of the West African craton and bordering belts during the Neoproterozoic: Precambrian Research, v. 69, p. 307-326
91. Wade, S., 1985, Contribution á I'étude des grisements de fer la Falémé (Sénégal oriental): Unpublished Ph.D. thesis, Nancy, France, Institute National Polytechnique de Lorraine, 255 p
92. Williams, P.J., Barton, M.D., Johnson, D.A., Fontboté, L., de Haller, A., Mark, D., Oliver, H.S., and Marschik, R., 2005, Iron oxide copper-gold deposits: Geology, space-time distribution, and possible modes of origin: ECONOMIC GEOLOGY 100TH ANNIVERSARY VOLUME, p. 371-405
93. Williams-Jones, A.E., Bowell, R.J., and Migdisov, A.A., 2009, Gold in solution: Elements, v. 5, p. 281-287
94. Yavuz, F., Yavuz, V., and Sasmaz, A., 2006, WinClastour-a Visual Basic program for tourmaline formula calculation and classification: Computers & Geosciences, v. 32, p. 1156-1168
95. Yoo, B.C., Lee, H.K., and White, N.C., 2010, Mineralogical, fluid inclusion, and stable isotope constraints on mechanisms of ore deposition at the Sangwang mine (Republic of Korea)-a mesothermal, vein-hosted gold-silver deposit: Mineralium Deposita, v. 45, p. 161-187