Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Studies on the Ore Mineralogy and Litho-geochemistry of the Sheba Deposit, Barberton Greenstone Belt, South Africa

  • Received : 2021.01.08
  • Accepted : 2021.03.10
  • Published : 2021.04.28
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Abstract

Ore criteria at the Sheba Deposit indicate orogenic mineralization type. Rocks and mineral assemblages suggest low formation-temperature of green-schist facies. Pyrite found in two generations; Type1 is irregular grains, contains higher arsenic and gold contents, compared to the relatively younger phase Type2 pyrite, which is composed of euhedral grains, found adjacent to late quartz-carbonate veins or at rims of type1 pyrite. Two gold generations were identified; type1 found included in sulphides (mainly pyrite). The second gold type was remobilized (secondary) into free-lodes within silicates (mainly quartz). Gold fineness is high, as gold contains up to 95 wt. % Au, Ag up to 3.5 wt. %, and traces of Cu, Ni, and Fe. Pyrite type2 contains tiny mineral domains (rich in Al, Mn, Hg, Se, Ti, V, and Cr). Zoning, and replacement textures are common, suggesting multiple mineralization stages. The distribution and relationships of trace elements in pyrite type2 indicate three formation patterns: (1) Al, Mn, Hg, Se, Ti, V, Cr, and Sn are homogeneously distributed in pyrite, reflecting a synchronous formation. (2) As, Ni, Co, Zn, and Sb display heterogeneous distribution pattern in pyrite, which may indicate post-formation existence due to other activities. (3) Au and Ag show both distribution patterns within pyrite, suggesting that gold is found both in microscopic phases and as chemically bounded phase.

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References

  1. Agangi, A., Hofmann, A. and Przybylowicz, W. (2014) Trace element zoning of sulfides and quartz at Sheba and Fairview gold deposits: Clues to Mesoarchean mineralization in the Barberton Greenstone Belt, South Africa. Ore Geol. Rev., v.56, p.94-114. doi: 10.1016/j.oregeorev.2013.08.016
  2. Altigani, M.A.H. (2021) Insights on Mineralogy and Chemistry of Fairview Gold Mine, Barberton Greenstone Belt, South Africa. Indonesian Journal on Geoscience, v.8(1), p.73-99. doi: 10.17014/ijog.8.1.73-99
  3. Altigani, M.A.H., Merkle, R.K.W. and Dixon R.D. (2016) Geochemical identification of episodes of gold mineralisation in the Barberton Greenstone Belt, South Africa, Ore Geol. Rev., v.75, p.186-205. doi: 10.1016/j.oregeorev.2015.12.016
  4. Anhaeusser, C.R. (1975) Precambrian Tectonic Environments. Annu. Rev. Earth Planet Sci., v.3, p.31-53. doi: 10.1146/annurev.ea.03.050175.000335
  5. Barrie, C.D., Boyle, A.P. and Prior, D.J. (2007) An analysis of the micro-textures developed in experimentally deformed polycrystalline pyrite and minor sulphide phases using electron backscatter diffraction. J. Struct. Geol., v.29, p.1494-1511. doi: 10.1016/j.jsg.2007.05.005
  6. Barrie, C.D., Boyle, A., Cook, N.J. and Prior, D.J. (2010) Pyrite deformation textures in the massive sulfide ore deposits of the Norwegian Caledonides. Tectonophysics, v.483, p.269-286. doi: 10.1016/j.tecto.2009.10.024
  7. Belcher, R.W. and Kisters, A.F.M. (2006) Syntectonic emplacement and deformation of the Heerenveen batholith: Conjectures on the structural setting of the 3.1 Ga granite magmatism in the Barberton granite greenstone terrain, South Africa. In: Reimold, WU, Gibson, RL (Eds.), Processes on the Early Earth. Geol. Soc. Am. Bull., Special Publication, v.405, p.211-231. doi: 10.1130/2006.2405(12)
  8. Bi, S., Li, J., Zhou, M. and Li, Z. (2011) Gold distribution in As-deficient pyrite and telluride mineralogy of the Yangzhaiyu gold deposit, Xiaoqinling district, southern North China craton, Miner. Deposita, v.46, p.925-941. doi: 10.1007/s00126-011-0359-2
  9. Brandl, G., Cloete, M. and Anhaeusser, C.R. (2006) Archaean greenstone belts. In: Johnson, MR, Anhaeusser, C.R. and Thomas, R.J. (Eds.) (2006). Geology of South Africa, Geological Society of South Africa, Johannesburg/ Council for Geosciences, Pretoria, p.9-56.
  10. Bumby, A.J., Eriksson, P.G., Catuneanu, O., Nelson, D.R. and Rigby, M.J. (2011) Meso-Archaean And Palaeo-Proterozoic Sedimentary Sequence Stratigraphy of The Kaapvaal Craton, Mar. Pet. Geol., v.33, p.92-116. doi: 10.1016/j.marpetgeo.2011.09.010.
  11. Cabri, L.J., Newville, M., Gordon, R.A., Crozier, E.D., Sutton, S.R., McMahon, G. and Jiang, D.T. (2000) Chemical speciation of gold in arsenopyrite. Canad. Mineral, v.38, p.1265-1281. doi: 10.2113/gscanmin.38.5.1265
  12. Chen, Z. (1999) Inter-element fractionation and correction in laser ablation inductively coupled plasma mass spectrometry. J. Anal. At. Spectrom., v.14, p.1823-1828. doi: 10.1039/a903272j
  13. Chenery, S., Cook, J.M., Styles, S. and Cameron, E.M. (1995) Determination of the three-dimensional distributions of precious metals in sulphide mineral by laser ablation microprobe-inductively coupled plasma-mass spectrometry (LAEMP-ICP-MS). Chem. Geol., v.124, p.55-65. doi: 10.1016/0009-2541(95)00024-g
  14. Ciobanu, C.L., Cook, N.J., Utsunomiya, S., Pring, A. and Green, L. (2011) Focussed ion beam transmission electron microscopy applications in ore mineralogy: Bridging micro- and nanoscale observations. Ore Geol. Rev., v.42, p.6-31. doi: 10.1016/j.oregeorev.2011.06.012
  15. Cook, N.J., Ciobanu, C.L. and Mao, J. (2009a) Textural control on gold distribution in As-free pyrite from the Dongping, huangtuliang and Hougou gold deposits, North China Craton. Chem. Geol., v.264, p.101-121. doi: 10.1016/j.chemgeo.2009.02.020
  16. Cook, N.J., Ciobanu, C.L., Pring, A., Skinner, W., Shimizu, M., Danyushevsky, L., Saini-Eidukat, B. and Melcher, F. (2009b) Trace and minor elements in sphalerite: A LA-ICP-MS study, Geochim. Cosmochim. Acta, v.73, p.4761-4791. doi: 10.1016/j.gca.2009.05.045
  17. Condie, K.C. (1993) Chemical composition and evolution of the upper continental crust: contrasting results from surface samples and shales. Chem. Geol., v.104, p.1-37. doi: 10.1016/0009-2541(93)90140-e
  18. Condie, K.C., Macke, J.E. and Reimer, T.O. (1970) Petrology and geochemistry of early Precambrian greywackes from the Fig Tree Group South Africa. Geol. Soc. Am. Bull., v.81, p.2759-2776. doi: 10.1130/0016-7606(1970)81[2759:pagoep]2.0.co;2
  19. Danchin, R.V. (1967) Chromium and nickel in the Fig Tree Shale from South Africa. Science, v.158, p.261-262. doi: 10.1126/science.158.3798.261
  20. Deditius, A.P., Utsunomiya, S., Reich M., Kesler S.E., Ewing R.C., Hough, R. and Walshe J. (2011) Trace metal nanoparticles in pyrite. Ore Geol. Rev., v.42, p.32-46. doi: 10.1016/j.oregeorev.2011.03.003
  21. Dirks, P.H.G.M., Charlesworth, E.G. and Munyai, M.R. (2009) Cratonic extension and Archaean gold mineralisation in the Sheba-Fairview mine, Barberton Greenstone Belt, South Africa. S. Afr. J. Geol., v.112, p.291-316. doi: 10.2113/gssajg.112.3-4.291
  22. Dirks, P.H.G.M., Charlesworth, E.G., Munyai, M.R. and Wormald, R. (2013) Stress analysis, post-orogenic extension and 3.01 Ga gold mineralisation in the Barberton Greenstone Belt, South Africa. Precambrian Res., v.226, p.157-184. doi: 10.1016/j.precamres.2012.12.007
  23. Dziggel, A., Otto, A., Kisters, A.F.M. and Meyer, F.M. (2007) Tectono metamorphic controls on Archaean gold mineralization in the Barberton greenstone belt, South Africa: an example from the New Consort gold mine. In: Van Kranendonk, M., Smithies, R.H., Bennett, V. (Eds.), Earth's Oldest Rocks. Developments in Precambrian Geology, v.15, p.699-727. doi: 10.1016/s0166-2635(07)15058-1
  24. Dziggel, A., Poujol, M., Otto, A., Kisters, A.F.M., Trieloff, M., Schwarzd, W.H. and Meyer, F.M. (2010) New U-Pb and 40Ar/39Ar ages from the northern margin of the Barberton greenstone belt, South Africa: Implications for the formation of Mesoarchaean gold deposits. Precambrian Res., v.179, p.206-220. doi: 10.1016/j.precamres.2010.03.006
  25. De Ronde, C.E.J., Kamo, S., Davis, D.W., De Wit, M.J. and Spooner, E.T.C. (1991) Field, geochemical and UPb isotopic constraints from hypabyssal felsic intrusions within the Barberton Greenstone Belt, South Africa: implications for tectonics and the timing of gold mineralization. Precambrian Res., v.49, p.261-280. doi: 10.1016/0301-9268(91)90037-b
  26. De Ronde, C.E.J., Spooner, E.T.C, De Wit, M.J. and Bray, C.J. (1992) Shear zone-related, Au quartz vein deposits in the Barberton greenstone belt, South Africa; field and petrographic characteristics, fluid properties, and light stable isotope geochemistry. Economic Geology, v.87, p.366-402. doi: 10.2113/gsecongeo.87.2.366
  27. De Ronde, C.E.J. and De Wit, M.J. (1994) The tectonic history of the Barberton greenstone belt, South Africa: - 490 million years of the Archaean crustal evolution. Tectonics, v.13, p.983-1005. doi: 10.1029/94TC00353
  28. De Vries, S.T. and Touret, J.L.R. (2007) Early Archaean hydrothermal fluids; a study of inclusions from the -3.4 Ga Buck Ridge Chert, Barberton Greenstone belt, South Africa. Chem. Geol., v.237, p.289-302. doi: 10.1016/j.chemgeo.2006.06.027
  29. De Wit, M.J., Furnes, H. and Robins, B. (2011) Geology and tectonostratigraphy of the Onverwacht Suite, Barberton Greenstone Belt, South Africa. Prec. Res., v.186, p.1-27. doi:10.1016/j.precamres.2010.12.007.
  30. Dixon, R.D., Merkle, R.K.W., Kurta, C. and Altigani, M.A.H. (2013) LA-ICP-MS ELEMENTAL MAPPING: AN EXAMPLE FOR PYRITE FROM SHEBA MINE, BARBERTON. Igneous and Metamorphic Studies Group. v.2013. Conference paper. Department of Geology, University of Free State, South Africa.
  31. Eglington, B.M. and Armstrong, R.A. (2004) The Kaapvaal Craton and adjacent orogens, southern Africa: a geochronological database and overview of the geological development of the craton. South African Journal of Geology, v.107, p.13-32. doi: 10.2113/107.1-2.13
  32. Eriksson, K.A., Krapez, B. and Fralik, P.W. (1997) Sedimentological aspects. In: De Wit, M.J., Ashwal, LD (Eds.), Greenstone Belts. Clarendon Press, Oxford, p.33-54.
  33. Eriksson, P.G., Martins-Neto, M.A., Nelson, D.R., Aspler, L.B., Chiarenzelli, J.R., Catuneanu, O., Sarkar, S., Altermann, W. and Rautenbach, W. (2001) An introduction to Precambrian basins: their characteristics and genesis. Sedimentary Geology, v.141-142, p.1-35. doi: 10.1016/s0037-0738(01)00066-5
  34. Gaboardi, M. and Humayun, M. (2009) Elemental fractionation during LA-ICP-MS analysis of silicate glasses: implications for matrix-independent standardization. Journal of Analytical Atomic Spectrometry, v.24, p.1188-1197. doi: 10.1039/B900876D
  35. Goldstein, J., Newbury, D. E., Michael, J. R. and Ritchie, M. W. M. (2003) Scanning electron microscopy and x-ray microanalysis, Springer, doi: 10.1007/978-1-4939-6676-9
  36. Grosch, E.G., Kosler, J., McLoughlin, N., Drost, K., Slama, J. and Pedersen, R.B. (2011) Paleoarchean detrital zircon ages from the earliest tectonic basin in the Barberton Greenstone Belt, Kaapvaal craton, South Africa. Precambrian Res., v.191, p.85-99. doi: 10.1016/j.precamres.2011.09.003
  37. 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 Geol. Rev., v.13, p.7-27. doi: 10.1016/S0169-1368(97)00012-7
  38. Hammond, N.Q. and Tabata, H. (1997) Characteristics of ore mineral associated with gold at the Prestea mine, Ghana. Mineralogical Magazine, v.61, p.879-894. https://doi.org/10.1180/minmag.1997.061.409.10
  39. Hammond, N.Q., Moore, J.M. and Sheets, R.W. (2007) Physico-chemical conditions of ore-forming fluids associated with genesis of the Kalahari Goldridge deposit, Kraaipan Greenstone Belt, South Africa. Ore Geol. Rev., v.30, p.106-134. doi: 10.1016/j.oregeorev.2005.11.003
  40. Hessler, A.M. and Lowe, D.R. (2006) Weathering and sediment generation in the Archaean: An integrated study of the evolution of siliciclastic sedimentary rocks of the 3.2 Ga Moodies Group, Barberton Greenstone Belt. South Africa. Precambrian Res., v.151, p.185-210. doi: 10.1016/j.precamres.2006.08.008
  41. Heubeck, C.E. and Lowe, D.R. (1994) Depositional and tectonic setting of the Archaean Moodies Group, Barberton greenstone belt, South Africa. Precambrian Res., v.68, p.257-290. doi: 10.1016/0301-9268(94)90033-7
  42. Heubeck, C.E. (1993) Geology of the Archaean Moodies Group, central Barberton greenstone belt, south Africa. PhD thesis (unpubl.), Stanford Univ., California, 413p.
  43. Hofmann, A., Bekker, A., Rouxel, O., Rumble, D. and Master, S. (2009) Multiple sulphur and iron isotope composition of detrital pyrite in Archaean sedimentary rocks: A new tool for provenance analysis. Earth and Planetary Science letters, v.286, p.436-445. doi: 10.1016/j.epsl.2009.07.008
  44. Hofmann, A. (2005) The geochemistry of sedimentary rocks from the Fig Tree Group, Barberton greenstone belt: Implications for tectonic, hydrothermal and surface processes during mid-Archaean times. Precambrian Res., v.143, p.23-49. doi: 10.1016/j.precamres.2005.09.005
  45. Humayun, M., Davis, F.A. and Hirschmann, M.M. (2010) Major element analysis of natural silicates by laser ablation ICP-MS. Journal of analytical Atomic Spectrometry, v.25, p.998-1005. doi: 10.1039/C001391A
  46. Hutchinson, R.W. (1993) A multi-stage, multi-process genetic hypothesis for greenstone hosted gold. Ore Geol. Rev., v.8, p.349-382. doi: 10.1016/0169-1368(93)90022-Q
  47. Kamo, S.L. and Davis, D.W. (1994) Reassessment of Archean crust development in the Barberton Mountain Land, South Africa, based on U-Pb dating. Tectonics, v.13, p.167-192. doi: 10.1029/93TC02254
  48. Kent, L.E. (1980) Stratigraphy of South Africa. South African Committee for Stratigraphy, Geological Survey of South Africa, Handbook v.8, 960p.
  49. Kisters, A.F.M., Belcher, R.W., Poujol, M. and Dziggel, A. (2010). Continental growth and convergence-related arc plutonism in the Mesoarchaean: Evidence from the Barberton granitoid-greenstone terrain, South Africa. Precambrian Res., v.178, p.15-26. doi: 10.1016/j.precamres.2010.01.002
  50. Lowe, D.R. (1994) Accretionary history of the Archean Barberton greenstone belt (3.55- 3.22 Ga). Southern Africa, Geology, v.22, p.1099-1102. doi: 10.1130/0091-7613(1994)022%3C1099:ahotab%3E2.3.co;2
  51. Lowe, D.R. (1999) Shallow-water sedimentation of accretionary lapilli-bearing strata of the Msauli Chert: Evidence of explosive hydromagmatic komatiitic volcanism. In: Lowe, D.R., Byerly, G.R. (Eds.), Geologic Evolution of the Barberton Greenstone Belt, South Africa. Geol. Soc. Am. Bull., Special Paper, v.329, p.213-232. doi: 10.1130/0-8137-2329-9.213
  52. Lowe, D.R. and Byerly, G.R. (1986) Archaean flow-top alteration zones formed initially in a low temperature sulphate-rich environment. Nature, v.324, p.245-248. doi: 10.1038/324245a0
  53. McLennan, S.M., Taylor, S.R. and Kroner, A. (1983) Geochemical evolution of Archean shales from South Africa. The Swaziland and Pongola Supergroups. Precambrian Res., v.22, p.93-124. doi: 10.1016/0301-9268(83)90060-8
  54. McLennan, S.M. (1984) Petrological characteristics of Archaean greywackes. J. Sediment. Res., v.54(3), p.889-898. doi: 10.1306/212f852b-2b24-11d7-8648000102c1865d
  55. Miyashiro, A. (1973) Metamorphism and Metamorphic belts. George Allen and Unwin., London, 492p. doi: 10.1007/978-94-011-6836-6
  56. Palenik, C.S., Ustunomiya, S., Reich, M., Kesler, S.E., Wang, L. and Ewing, R.C. (2004) "Invisible" gold revealed: direct imagining of gold nanoparticles in a Carlin-type deposit. Am. Mineral, v.89, p.1359-1366. doi: 10.2138/am-2004-1002
  57. Pickhardt, C., Dietze, H. and Becker, J.S. (2005) Laser ablation inductively coupled plasma mass spectrometry for direct isotope ratio measurements on solid samples. Int. J. Mass Spectrom., v.242, p.273-280. doi: 10.1016/j.ijms.2004.12.014
  58. Reed, S.J.B. (1983) Electron Microprobe Analysis, Applied Science Publishers Ltd., Analysis of High Temperature Materials, p.91-127.
  59. Reed, S.J.B. (2005) Electron Microprobe Analysis and Scanning Electron Microscopy in Geology, Cambridge Univ. Press, New York, 189 p. doi: 10.1017/cbo9780511610561
  60. Reich, M., Kesler, S.E., Utsunomiya, S., Palenik, C.S., Chryssoulis, S.L. and Ewing, R.C. (2005) Solubility of gold in arsenian pyrite. Geochim. Cosmochim. Acta, v.69, p.2781-2796. doi: 10.1016/j.gca.2005.01.011
  61. Rouchon, V., Orberger, B., Hofmann, A. and Pinti, D.L. (2009) Diagenetic Fe-carbonates in Paleoarchean felsic sedimentary rocks (Hooggenoeg Formation, Barberton greenstone belt, South Africa): Implications for CO2 sequestration and the chemical budget of seawater. Precambrian Res., v.172, p.255-278. doi: 10.1016/j.precamres.2009.04.010
  62. Robertson, M.J., Charlesworth, E.G. and Phillips, G.N. (1993) Gold mineralization during progressive deformation at the Main Reef Complex, Sheba Gold Deposit, Barberton Greenstone-Belt, South-Africa. Information Circular, Economic Geology Research Unit, University of the Witwatersrand, Johannesburg, v.267, 26p.
  63. Schouwstra, R.P. and De Villiers, J.P.R. (1988) Gold mineralization and associated wall rock alteration in Main Reef Complex at Sheba deposit, South Africa. Transactions Institute Mining Metallurgy, v.97B, p.158-170.
  64. Shaheen, M.E., Gagnon, J.E. and Fryer, B.J. (2012) Femtosecond (fs) lasers coupled with modern ICPMS instruments provide new and improved potential for in situ elemental and isotopic analyses in the geosciences. Chem. Geol, v.330-331, p.260-273. doi: 10.1016/j.chemgeo.2012.09.016
  65. Simon, G., Huang, H., Penner-Hahn, E., Kesler, S.E. and Kao, L.S. (1999) Oxidation state of gold and arsenic in gold-bearing arsenian pyrite. Am. Mineral, v.84, p.1071-1079. doi: 10.2138/am-1999-7-809
  66. Simpson, E.L., Erikson, K.A. and Mueller, W.U. (2012) 3.2 Ga aeolian deposits from the Moodies Group, Barberton Greenstone Belt, South Africa: Implications for the origin of first-cycle quartz sandstones. Precambrian Res., v.214-215, p.185-191. doi: 10.1016/j.precamres.2012.01.019
  67. Stiegler, M.T., Lowe, D.R. and Byerly, G.R. (2010) The Petrogenesis of Volcaniclastic Komatiites in the Barberton Greenstone Belt, South Africa: a textural and Geochemical Study. J. Petrol., v.51, p.947-972. doi: 10.1093/petrology/egq008
  68. Sung, Y.H., Brugger, J., Ciobanu, L., Pring, A., Skinner, W. and Nugus, M. (2009) Invisible gold in arsenian pyrite and arsenopyrite from a multistage Archaean gold deposit: Sunrise Dam, Eastern Goldfields Province, Western Australia, Mineral Deposits, v.44, p.765-791. doi: 10.1007/s00126-009-0244-4
  69. Sylvester, P.J., Cabri, L.J., Tubrett, M.N., McMahon, G., Laflamme, J.H.G. and Peregoedova, A. (2005) Synthesis and evaluation of a fused pyrrhotite standard reference material for platinum group element and gold analysis by laser ablation-ICPMS, in Tormanen, T.O., and Alapieti, T.T., eds., 10th International Platinum Symposium: Oulu, Geological Survey of Finland, Extended Abstracts, p.16-20.
  70. Sylvester, P.J. (2008) Laser ablation-ICP-MS in the earth sciences: Current practices and outstanding issues. Mineralogical Association of Canada, 348p.
  71. Toulkeridis, T., Clauer, N., Kroner, A., Reimer, T. and Todt, W. (1999) Characterization, provenance, and tectonic setting of the Fig Tree greywackes from the Archaean Barberton Greenstone Belt, South Africa. Sediment. Geol., v.124, p.113-129. doi: 10.1016/s0037-0738(98)00123-7
  72. Van Kranendonk, M.J., Smithiers, R.H. and Bennet, V.C. (2007) Earth' Oldest Rocks, Developments in Precambrian Geology, v.15, 1331p.
  73. Vaughan, J.P. and Kyin, A. (2004) Refractory gold ores in Archaean greenstones, Western Australia: mineralogy, gold paragenesis, metallurgical characterization and classification. Mineral. Mag., v.68, p.255-277. doi: 10.1180/0026461046820186
  74. Viljoen, M.J. and Viljoen, R.P. (1969) An introduction to the geology of the Barberton granite-greenstone terrain. Upper Mantle Project. Special Publication Geological Society of South Africa, v.2, p.9-28.
  75. Ward, J.H.W. (1995) Geology and metallogeny of the Barberton greenstone belt: a survey. J. Afr. Earth. Sci., v.21, p.213-240. doi: 10.1016/0899-5362(95)00067-4
  76. Ward, J.H.W. (1999) The metallogeny of the Barberton Greenstone Belt, South Africa and Swaziland. Geological Survey of South Africa, Memoir, v.86, 116p.
  77. Watling, R.J., Herbert, H.K., Delev, D. and Abell, J. D. (1994) Gold fingerprinting by laser ablation inductively coupled plasma mass spectrometry, Spectrochlmrca Acta Part B: Atomic Spectroscopy,. v.499, p.205-219. doi: 10.1016/0584-8547(94)80019-7
  78. Winderbaum, L., Ciobanu, C.L., Cook, N.J., Paul, M., Metcalfe, A. and Gilbert, S. (2012) Multivariate Analysis of an LA-ICP-MS Trace Element Dataset for Pyrite. Mathematical Geosciences, v.44. p.823-842. doi: 10.1007/s11004-012-9418-1.
  79. Woodhead, J., Hergt, J., Meffre, S., Large, R.R., Danyushevsky, L. and Gilbert, S. (2009) In situ Pb-isotope analysis of pyrite by laser ablation (multi-collector and quadrupole) ICP-MS. Chem. Geol., v.262, p.344-354. doi: 10.1016/j.chemgeo.2009.02.003