creators_name: Cooke, DR creators_name: Bull, SW creators_name: Large, RR creators_name: McGoldrick, PJ creators_id: David.Cooke@utas.edu.au creators_id: S.Bull@utas.edu.au creators_id: Ross.Large@utas.edu.au creators_id: P.McGoldrick@utas.edu.au type: article datestamp: 2008-07-10 11:18:27 lastmod: 2008-07-18 10:55:26 metadata_visibility: show title: The importance of oxidized brines for the formation of australian Proterozoic stratiform sediment-hosted Pb-Zn (sedex) deposits ispublished: pub subjects: 260104 full_text_status: restricted note: © 2000 Society of Economic Geologists. abstract: A two-fold subdivision for stratiform sediment-hosted Pb-Zn (sedimentary exhalative, sedex) deposits is proposed, based on fundamental differences in the chemistry of the mineralizing brines. The type of sedimentary basin from which the ore fluids are derived, and the litholOgies contained within the basin, control these differences in fluid chemistry. The two discrete brine types capable of transporting Zn and Pb are oxidized brines and reduced, acidic brines. McArthur-type depOSits (e.g., McArtJ1Ur River, Mount 1sa, Hilton) precipitate from oxidized (SOJpredOminant), acidic to near-neutral brines that evolve from sedimentary basins dominated by carbonates, evaporites, and hematitic sandstones and shales. Selwyn-type depOSits (e.g., Sullivan, Rammelsberg, sedex deposits of the Selwyn basin) precipitate from acidic, reduced (H2S-predominant) connate brines that evolved in reduced siliciclastic and shale basins. Temperature decrease and dilution (fluid mixing), addition of H2S, and pH increase can all be effective depOSitional processes for Zn and Pb from reduced (Selwyn-type) brines. In conb'ast, sulfate reduction ancVor addition of H2S (via fluid mixing or interaction with earlier formed pyrite) may be the important processes for sphalerite and galena depOSition from oxidized (McArthur-type) brines. McAlthur-type sedex depOSits are intimately associated with siderite or ferroan carbonate alteration halos and most l.ikEJy precipitate from lower temperature brines than Selwyn-type deposits. The redox state of the mineralized blines (sulfate or sulfide predominant) is impOltant for controlling minor element associations in the two classes of sedex deposits. Weakly acidic to weakly alkaline oxidized brines CaIl precipitate sidelite but are incapable of carrying Significant gold, tin, and barium in solution, and as such, McArtllw-type deposits do not contain anomalous concentrations of these elements. Reduced, acid brines can cany high concentrations of baJium, explaining the common association with barite in these deposits. If reduced sulfur concentrations were sufficient in the mineralizing brines, individual Selwyn-type deposits may contain anomalous or ore-wade gold. If the brines were higWy reduced (pylThotite-stable), they may have carried high concentrations oftin (e.g., Sullivan). The lack of sulfide-bearing feeder systems in McArthur-type deposits and their common occurrence in Selwyn-type depOSits probably also relate to the redox state of the brines. From a mineral exploration perspective, oxidized sedimentary blines are more likely to produce large tonnage Zn-Pb-Ag depOSits that have siderite or ankerite alteration halos and commonly lack barite lenses and vent complexes. By contrast, deposits that form in reduced siliciclastic and shale-dominated basins are more likely to be lower tonnage and to contain barite, vent complexes and may have minor gold or tin credits. date: 2000-01 date_type: published publication: Economic Geology volume: 95 number: 1 pagerange: 1-18 refereed: TRUE issn: 0361-0128 official_url: http://econgeol.geoscienceworld.org/cgi/content/abstract/95/1/1 referencetext: 1. Anderson, G.M. The hydrothermal transport and deposition of galena and sphalerite near 100°C (1973) Economic Geology, 68, pp. 480-492. Cited 13 times. 2. Anderson, G.M. PRECIPITATION OF MISSISSIPPI VALLEY-TYPE ORES. (1975) Economic Geology, 70 (5), pp. 937-942. Cited 27 times. 3. Basinal brines and Mississippi Valley type ore deposits (1978) Episodes, 2, pp. 15-19. Cited 3 times. 4. Ansdell, K.M., Nesbitt, B.E., Longstaffe, F.J. A fluid inclusion and stable isotope study of the Tom Ba-Pb-Zn deposit, Yukon Territory, Canada (1989) Economic Geology, 84 (4), pp. 841-856. Cited 8 times. 5. Badham, J.P.N. Shale-hosted Pb-Zn deposits: products of exhalation of formation waters? (1981) Transactions of the Institution of Mining & Metallurgy (Section B: Applied Earth Science), 90, pp. 70-76. Cited 5 times. 6. Benning, L.G., Seward, T.M. Hydrosulphide complexing of Au(I) in hydrothermal solutions from 150-400°C and 500-1500 bar (1996) Geochimica et Cosmochimica Acta, 60 (11), pp. 1849-1871. Cited 105 times. doi: 10.1016/0016-7037(96)00061-0 7. Broadbent, G.C., Myers, R.E., Wright, J.V. Geology and origin of shale-hosted Zn-Pb-Ag mineralization at the Century deposit, Northwest Queensland, Australia (1998) Economic Geology, 93 (8), pp. 1264-1294. Cited 34 times. 8. Bull, S.W. Sedimentology of the Palaeoproterozoic Barney Creek Formation in DDH BMR McArthur 2, Southern McArthur Basin, Northern Territory (1998) Australian Journal of Earth Sciences, 45 (1), pp. 21-31. Cited 21 times. 9. Carne, R.C., Cathro, R.J. Sedimentary exhalative (sedex) zinc-lead-silver deposits, northern Canadian Cordillera. (1982) Canadian Mining & Metallurgical Bulletin, 75 (840), pp. 66-78. Cited 12 times. 10. Carr, G.R. Primary geochemical and mineralogical dispersion in the vicinity of the Lady Loretta Zn-Pb-Ag deposit, northwest Queensland. (1984) Journal of Geochemical Exploration, 22 (1-3), pp. 217-238. Cited 5 times. 11. Cooke, D.R., Large, R.R. Practical uses of chemical modelling - Defining new exploration targets in sedimentary basins (1998) Australian Geological Survey Organisation Journal of Australian Geology and Geophysics, 17, pp. 4259-4275. 12. Cooke, D.R., Bull, S.W., Donovan, S., Rogers, J.R. K-metasomatism and base metal depletion in volcanic rocks from the McArthur basin, northern territory-implications for base metal mineralization (1998) Economic Geology, 93 (8), pp. 1237-1263. Cited 17 times. 13. Corbett, J.A., Lambert, I.B., Scott, K.M. (1975) Results of Analyses of Rocks from McArthur Area, Northern Territory, Australia CSIRO Technical Communication 57, Minerals Research Laboratories, 35 p 14. Eadington, P.J., Giblin, A. (1979) Alteration Minerals and the Precipitation of Tin in Granitic Rocks CSIRO Institute of Earth Sciences Technical Communication, 37 p 15. Eldridge, C.S., Williams, N., Walshe, J.L. Sulfur isotope variability in sediment-hosted massive sulfide deposits as determined using the ion microprobe SHRIMP: II. A study of the H.Y.C. deposit at McArthur River, Northern Territory, Australia (1993) Economic Geology, 88 (1), pp. 1-26. Cited 43 times. 16. Etheridge, M.A., Wall, V.J. Tectonics and structural evolution of the Australian Proterozoic (1994) Geological Society of Australia Abstracts, 37, pp. 102-103. Cited 20 times. 17. Eugster, H.P. Geochemical environments of sediment-hosted Cu-Pb-Zn deposits (1989) Geological Association of Canada Special Paper, 36, pp. 111-126. Cited 2 times. 18. Freeman, C.J. Exploration review - Alaska (1998) Society of Economic Geologists Newsletter, 34, p. 28. Cited 2 times. 19. Gammons, C.H., Williams-Jones, A.E. Hydrothermal geochemistry of electrum: thermodynamic constraints (1995) Economic Geology, 90 (2), pp. 420-432. Cited 45 times. 20. Gardner, H.D., Hutcheon, I. Geochemistry, mineralogy, and geology of the Jason Pb-Zn deposits, Macmillan Pass, Yukon, Canada. (1985) Economic Geology, 80 (5), pp. 1257-1276. Cited 11 times. 21. Goodfellow, W.D. Sediment-hosted Zn-Pb-Ag deposits of North America (1998) Hobart, Tasmania, University of Tasmania, Centre for Ore Deposit Research Special Publication, 2, pp. 23-46. 22. Goodfellow, W.D., Lydon, J.W., Turner, R.J.W. Geology and genesis of stratiform sediment-hosted (SEDEX) zinc-lead- silver sulphide deposits (1993) Geological Association of Canada Special Paper, 40, pp. 201-251. Cited 56 times. 23. Gustafson, L.B., Williams, N. Sediment-hosted stratiform deposits of copper, lead, and zinc. (1981) Economic Geology, Seventy-fifth Anniversary Volume (1905-1980), pp. 139-178. Cited 43 times. 24. Hanor, J.S. Origin of saline fluids in sedimentary basins (1994) Geofluids: origin, migration and evolution of fluids in sedimentary basins, pp. 151-174. Cited 86 times. 25. Variations in chloride as a driving force in siliciclastic (1996) Society for Sedimentary Geology Special Publication, 55, pp. 3-12. 26. Controls on the solubilization of lead and zinc in basinal brines (1996) Economic Geology Special Publication, 4, pp. 483-500. Cited 19 times. 27. Geochemistry and origin of metal-rich brines in sedimentary basins (1998) Hobart, Tasmania, University of Tasmania, Centre for Ore Deposit Research Special Publication, 2, pp. 129-146. 28. Haynes, D.W., Bloom, M.S. Stratiform copper deposits hosted by low-energy sediments: III. Aspects of metal transport. (1987) Economic Geology, 82 (3), pp. 635-648. Cited 11 times. 29. Haynes, D.W., Bloom, M.S. Stratiform copper deposits hosted by low-energy sediments: IV. Aspects of sulfide precipitation. (1987) Economic Geology, 82 (4), pp. 875-893. Cited 7 times. 30. Heinrich, C.A. The chemistry of hydrothermal tin(-tungsten) ore deposition (1990) Economic Geology, 85 (3), pp. 457-481. Cited 67 times. 31. Heinrich, C.A., Bain, J.H.C., Mernagh, T.P., Wyborn, L.A.I., Andrew, A.S., Waring, C.L. Fluid and mass transfer during metabasalt alteration and copper mineralization at Mount Isa, Australia (1995) Economic Geology, 90 (4), pp. 705-730. Cited 32 times. 32. Helgeson, H.C. Thermodynamics of hydrothermal systems at elevated temperatures and pressures (1969) American Journal of Science, 267, pp. 729-804. Cited 241 times. 33. Hinman, M. Base metal mineralisation at McArthur River. Structure and kinematics of the HYC-Cooley zone at McArthur River (1995) Australian Geological Survey Record, 1995 (5). Cited 14 times. 28 p 34. Constraints, timing and processes of stratiform base metal mineralisation at the HYC Ag-Pb-Zn deposit, McArthur River (1996) Economic Geology Research Unit Contribution, 55, pp. 56-59. Cited 20 times. 35. Speculations on syn-diagenetic processes of sulphate reduction at the HYC Pb-Zn deposit, N.T (1998) Geological Society of Australia Abstracts, 49, p. 212. Cited 2 times. 36. Hinman, M., Wall, V., Heinrich, C. The interplay between sedimentation, deformation and hydrothermal activity at the McArthur Pb-Zn(-Cu) deposit (1994) Geological Society of Australia Abstracts, (37), pp. 176-177. Cited 11 times. 37. Huston, D.L. The hydrothermal environment (1998) Australian Geological Survey Organisation Journal of Australian Geology and Geophysics, 17 (4), pp. 15-30. Cited 5 times. 38. Jackson, K.J., Helgeson, H.C. Chemical and thermodynamic constraints on the hydrothermal transport and deposition of tin: II. Interpretation of phase relations in the southeast Asian tin belt. (1985) Economic Geology, 80 (5), pp. 1365-1378. Cited 12 times. 39. Jackson, M.J., Muir, M.D., Plumb, K.A. Geology of the southern McArthur Basin, Northern Territory ( Australia). (1987) Bulletin - Bureau of Mineral Resources, Geology & Geophysics, Australia, 220, pp. 173. Cited 15 times. 40. Johnson, J.W., Oelkers, E.H., Helgeson, H.C. SUPCRT92: A software package for calculating the standard molal thermodynamic properties of minerals, gases, aqueous species, and reactions from 1 to 5000 bar and 0 to 1000°C (1992) Computers and Geosciences, 18 (7), pp. 899-947. Cited 696 times. 41. Kitto, P.A. (1994) Structural and Geochemical Controls on Mineralisation at Renison, Tasmania. Cited 2 times. Unpublished Ph.D. thesis, Hobart, Tasmania, Australia, University of Tasmania, 484 p 42. Renison-style carbonate-replacement Sn deposits (1998) Australian Geological Survey Organisation Journal of Australian Geology and Geophysics, 17 (4), pp. 163-168. Cited 2 times. 43. Krebs, W. Sedimentary-type stratiform ore deposits (1981) Geoscience Canada, 8, pp. 170-172. 44. The geology of the Meggen ore deposit (1981) Handbook of Stratabound and Stratiform Ore Deposits, pp. 509-549. Wolf, K.H., ed.: Amsterdam, Elsevier 45. Kyle, J.R. Red dog shale-hosted Zn-Pb-Ag-Ba deposit, Western Brooks Range (1994) University of Sydney Short Course Notes, pp. RD1-RD8. Earth Resources Foundation 46. Large, D.E. Geological parameters associated with sediment-hosted, submarine exhalative Pb-Zn deposits: An empirical model for mineral exploration (1980) Geologisches Jahrbuch, D40, pp. 59-129. Cited 22 times. 47. Sediment-hosted massive sulphide lead-zinc deposits: An empirical model (1983) Mineralogical Association of Canada Short Course Handbook, 8, pp. 1-30. Cited 31 times. 48. Large, R.R., McGoldrick, P.J. Lithogeochemical halos and geochemical vectors to stratiform sediment hosted Zn-Pb-Ag deposits, 1. Lady Loretta deposit, Queensland (1998) Journal of Geochemical Exploration, 63 (1), pp. 37-56. Cited 22 times. doi: 10.1016/S0375-6742(98)00013-2 49. Large, R.R., Bull, S.W., Cooke, D.R., McGoldrick, P.J. Review of genetic models at HYC: Constraints from new sedimentology, alteration halo studies and fluid chemical modelling (1996) Townsville, James Cook University of North Queensland, Economic Geology Research Unit Contribution, 55, pp. 72-74. Cited 2 times. 50. Large, R.R., Bull, S.W., Cooke, D.R., Mcgoldrick, P.J. A genetic model for the HYC deposit, Australia: Based on regional sedimentology, geochemistry, and sulfide-sediment relationships (1998) Economic Geology, 93 (8), pp. 1345-1368. Cited 44 times. 51. Large, R.R., Bull, S.W., McGoldrick, P.J. Lithogeochemical halos and geochemical vectors to stratiform sediment-hosted Zn-Pb-Ag deposits, Part 2. HYC Deposit, McArthur River, Northern Territory Journal of Geochemical Exploration in press (in press) 52. Lydon, J.W. Chemical parameters controlling the origin and deposition of sediment-hosted stratiform lead-zinc deposits (1983) Mineralogical Association of Canada Short Course Handbook, 8, pp. 175-250. Cited 23 times. 53. MacIntyre, D.G. Geology and stratiform barite-sulphide deposits of the Gataga district, northeast British Columbia (1983) Mineralogical Association of Canada Short Course Handbook, 8, pp. 85-119. 54. McGoldrick, P.J. (1986) Volatile and Precious Metal Geochemistry of the Mount Isa Ores and Their Host Rocks. Cited 5 times. Unpublished Ph.D. thesis, Parkville, Victoria, University of Melbourne, 330 p 55. McGoldrick, P.J., Keays, R.R. Mount Isa copper and lead-zinc-silver ores: Coincidence or cogenesis? (1990) Economic Geology, 85, pp. 641-650. Cited 12 times. 56. McGoldrick, P.J., Keays, R., Smith, R., McOrist, G., Fardy, J. Gold in Australian Late Palaeoproterozoic stratiform sediment-hosted zinc-lead-silver deposits (1996) Geological Society of Australia Abstracts, 41, p. 287. 57. McGoldrick, P.J., Dunster, J., Cooke, D.R., Aheimer, M. New observations from the Lady Loretta Zn-Pb-Ag deposit: Towards a new genetic model (1996) Economic Geology Research Unit Contribution, 55, pp. 81-84. Cited 2 times. 58. McGoldrick, P.J., Bull, S.W., Cooke, D.R., Large, R.R. Northern Australian Proterozoic stratiform sediment-hosted (sedex) Zn-Pb-Ag (1998) Hobart, Tasmania, University of Tasmania, Centre for Ore Deposit Research Special Publication, 2, pp. 11-22. Cited 2 times. 59. McKibben, M.A., Williams, A.E. Metal speciation and solubility in saline hydrothermal fluids: an empirical approach based on geothermal brine data (1989) Economic Geology, 84 (7), pp. 1996-2007. Cited 9 times. 60. Morganti, J.M. Ore deposit models - 4. Sedimentary-type stratiform ore deposits: some models and a new classification. (1981) Geoscience Canada, 8 (2), pp. 65-75. Cited 3 times. 61. Mulligan, R. Geology of Canadian tin occurrences (1975) Geological Survey of Canada Economic Geology Report, 28. 155 p 62. Pabalan, R.T. (1986) Solubility of Cassiterite (SnO2) in NaCl Solutions from 200°c-350°C, with Geologic Applications. Cited 10 times. Unpublished Ph.D. thesis, College Station, Penn., Pennsylvania State University, 140 p 63. Page, R.W., Sweet, I.P. Geochronology of basin phases in the wastern Mt Isa Inlier, and correlation with the McArthur Basin (1998) Australian Journal of Earth Sciences, 45 (2), pp. 219-232. Cited 64 times. 64. Perkins, W.G., Bell, T.H. Stratiform replacement lead-zinc deposits: A comparison between Mount Isa, Hilton, and McArthur River (1998) Economic Geology, 93 (8), pp. 1190-1212. Cited 19 times. 65. Pietsch, B.A., Rawlings, D.J., Creaser, P.M., Kruse, P.D., Ahmad, M., Ferenczi, P.A., Findhammer, T.L.R. (1991) Bauhinia Downs SE53-3. 1: 250,000 Geological Map Series, Explanatory Notes. Cited 4 times. Government Printer of the Northern Territory, 76 p 66. Plumb, K.A. Structural evolution of the McArthur basin (1994) Australian Institute of Mining and Metallurgy Annual Conference, 5th, pp. 139-145. Cited 6 times. Darwin, August 5-9, 1994, Proceedings 67. Plumb, K.A., Derrick, G.M., Wilson, I.H. Precambrian geology of the McArthur River - Mount Isa region, northern Australia (1980) Brisbane, Geological Society of Australia, Queensland Division, 4, pp. 71-88. Cited 15 times. Henderson, R.A., and Stephenson, P.J., eds., The geology and geophysics of northeastern Australia 68. Plumlee, G.S., Leach, D.L., Hofstra, A.H., Landis, G.P., Rowan, E.L., Viets, J.G. Chemical reaction path modeling of ore deposition in Mississippi Valley-type Pb-Zn deposits of the Ozark region, US midcontinent (1994) Economic Geology, 89 (6), pp. 1361-1383. Cited 50 times. 69. Price, Leigh C. AQUEOUS SOLUBILITY OF PETROLEUM AS APPLIED TO ITS ORIGIN AND PRIMARY MIGRATION. (1976) AAPG Bulletin (American Association of Petroleum Geologists), 60 (2), pp. 213-244. Cited 71 times. 70. Rawlings, D.J., Madigan, T.L., Pietsch, B.A., Haines, P.W., Findhammer, T.L.R. (1993) Tawallah Range 6066. 1:100 000 Geological Map Series, Explanatory Notes. Cited 3 times. Government Printer of the Northern Territory, 74 p 71. Rhodes, D. Geology and genesis of the Tom deposit, Yukon, Canada (1993) World Zinc '93 Conference, pp. 95-110. Cited 2 times. Hobart, Proceedings 72. Roedder, E. The noncolloidal origin of colloform textures in sphalerite (1968) Economic Geology, 63, pp. 451-471. Cited 19 times. 73. Samson, I.M., Russell, M.J. Genesis of the silvermines zinc- lead barite deposit, Ireland: fluid inclusion and stable isotope evidence. (1987) Economic Geology, 82 (2), pp. 371-394. Cited 37 times. 74. Sangster, D.F. Sediment hosted stratiform lead-zinc deposits (1983) Mineralogical Association of Canada Short Course Handbook, 8. 309 p 75. Sawkins, F.J. Ore genesis by episodic dewatering of sedimentary basins: application to giant Proterozoic lead-zinc deposits. (1984) Geology, 12 (8), pp. 451-454. Cited 12 times. 76. Shanks III, W.C., Woodruff, L.G., Jilson, G.A., Jennings, D.S., Modene, J.S., Ryan, B.D. Sulfur and lead isotope studies of stratiform Zn-Pb-Ag deposits, Anvil Range, Yukon: basinal brine exhalation and anoxic bottom- water mixing ( Canada). (1987) Economic Geology, 82 (3), pp. 600-634. Cited 6 times. 77. Skinner, B.J. The many origins of hydrothermal mineral deposits (1979) Geochemistry of Hydrothermal Ore Deposits, 2nd Ed., pp. 1-21. Cited 19 times. Barnes, H.L., ed.: New York, John Wiley and Sons 78. Solomon, M., Heinrich, C.A. Are high-heat-producing granites essential to the origin of giant lead-zinc deposits at Mount Isa and McArthur River, Australia? (1992) Exploration and Mining Geology, 1 (1), pp. 85-91. Cited 18 times. 79. Spycher, N.F., Reed, M.H. (1990) Users Guide for the SOLTHERM Database. Cited 2 times. Unpublished report, Eugene, Ore., University of Oregon 80. Sverjensky, D.A. Oil field brines as ore-forming solutions. (1984) Economic Geology, 79 (1), pp. 23-37. Cited 57 times. 81. Sverjensky, D.A. Genesis of Mississippi Valley-type lead-zinc deposits. (1986) Annual Review of Earth & Planetary Sciences, 14, pp. 177-199. Cited 34 times. 82. Sverjensky, D.A. The role of migrating oil field brines in the formation of sediment-hosted Cu-rich deposits. (1987) Economic Geology, 82 (5), pp. 1130-1141. Cited 25 times. 83. Sverjensky, D.A. Chemical evolution of basinal brines that formed sediment-hosted Cu- Pb-Zn deposits (1989) Geological Association of Canada Special Paper, 36, pp. 127-134. Cited 4 times. 84. Waltho, A.E., Allnutt, S.L., Radojkovic, A.M. Geology of the century zinc deposit, northwest Queensland (1993) World Zinc '93 Conference, 7th, pp. 111-129. Cited 8 times. Hobart, October 10-13, 1993, Proceedings 85. Williams, Neil STUDIES OF THE BASE METAL SULFIDE DEPOSITS AT McARTHUR RIVER, NORTHERN TERRITORY, AUSTRALIA - 1. THE COOLEY AND RIDGE DEPOSITS. (1978) Economic Geology, 73 (6), pp. 1005-1035. Cited 23 times. 86. Williams, Neil STUDIES OF THE BASE METAL SULFIDE DEPOSITS AT McARTHUR RIVER, NORTHERN TERRITORY, AUSTRALIA - 2. THE SULFIDE-S AND ORGANIC-C RELATIONSHIPS OF THE CONCORDANT DEPOSITS AND THEIR SIGNIFICANCE. (1978) Economic Geology, 73 (6), pp. 1036-1056. Cited 21 times. 87. Worner, H.K., Mitchell, R.W., Segnit, E.R. Minerals of Broken Hill. (1982) Minerals of Broken Hill., pp. 260. Cited 2 times. ISBN: 0909221189 88. Young, L.E. Geology and genesis of the Red Dog deposit, western Brooks Range, Alaska (1989) Canadian Institute of Mining Bulletin, 82, pp. 57-67. Cited 19 times. citation: Cooke, DR and Bull, SW and Large, RR and McGoldrick, PJ (2000) The importance of oxidized brines for the formation of australian Proterozoic stratiform sediment-hosted Pb-Zn (sedex) deposits. Economic Geology, 95 (1). pp. 1-18. ISSN 0361-0128 document_url: http://eprints.utas.edu.au/6294/1/The_Importance_of_Oxidized_Brines.pdf