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Harquail Family Invests $10M in Earth Sciences

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Jeremy Richards

Dr. Jeremy P. Richards (P.Geo.)

Professor, Tier I Canada Research Chair in Metallogeny

B.A. (Cambridge), M.Sc. (Toronto), Ph.D. (Australian National University)
Economic geology, geochemistry, geochronology, tectonics

Contact

Harquail School of Earth Sciences
Laurentian University
Sudbury, Ontario
P3E 2C6
Telephone: (705) 675-1151 ext 2349
E-mail: JRichards2@laurentian.ca

Research Interests

My research has two main foci: (1) the genesis of hydrothermal mineral deposits, and (2) sustainable development.
Metallogenic research includes regional tectonic and magmatic controls on mineralization, volcanology, and detailed ore depositional mechanisms, and I have investigated the formation of various types of ore deposit, including sediment-hosted, vein-type, and porphyry-type copper, and mesothermal and epithermal gold mineralization. My current research involves the study of regional controls on porphyry copper and polymetallic epithermal mineralization in Canada, northern Chile, Argentina, Colombia, Iran, Pakistan, and Turkey.
Sustainable development research has included studies of sustainable mine development in Vietnam and Romania, and supervision of Masters projects on sustainability in Alberta's aggregates resource sector, socio-economic impacts of the Nanisivik and Polaris mines in northern Canada, fiscal measures such as taxation to improve the sustainable development of mineral resources, and a study of sustainability in Nigeria's small-scale mining sector.

Career History

2017 July Professor and Canada Research Chair in Metallogeny, Laurentian University
2012–2013 Guest Research Fellow, Institute of Geology, Chinese Academy of Geological Sciences
2009–2010 Interim Executive Director of the Association of Academic Staff–University of Alberta
2002–2017 June Professor, University of Alberta, Canada
2006–2009 Adjunct Professor, Dept. Economics, Faculty of Arts, University of Alberta
1997–2002 Associate Professor, University of Alberta
1992–1997 Lecturer, University of Leicester, UK
1990–1992 Post-Doctoral Fellow, University of Saskatchewan, Canada
1990 May–July Research Assistant, Australian National University
1987–1990 Australian National University (Ph.D.)
1983–1986 University of Toronto, Canada (M.Sc.)
1980–1983 University of Cambridge, UK (B.A. Hons.)

Awards and Recognition

2016: Society of Economic Geologists: 2016 Thayer Lindsley Visiting Lecturer (selected on the basis of proven scientific expertise in a field of economic geology and competence as a public speaker).
2015: Society of Economic Geologists: 2015 Silver Medal (awarded to mid-career recipients for excellence in original work in the geology of mineral deposits).
2012: Australasian Institute of Mining and Metallurgy, New Zealand Branch Visiting Lecturer.
2011: University of Alberta President’s Achievement Award (part of 22-member team that created Science 100 course).
2007: CIM 2007 Julian Boldy Memorial Award (in recognition of exceptional contributions made to the Geological Society of CIM).
2007: Julian Boldy Certificate Award to the co-authors of (one of three of) the most significant and creative papers presented at the Mineral Deposits Division sessions at the Geological Association of Canada/Mineralogical Association of Canada Annual Meeting (Yellowknife, 2007).
2007: Geological Association of Canada, W.W. Hutchison Medallist Lecturer 2007–2008.
2007: Geological Association of Canada, W.W. Hutchison Medal (awarded to a young individual for recent exceptional advances in Canadian Earth Science research).
2004: Canadian Institute of Mining and Metallurgy, Geological Society, 2004/2005 University Visiting Lecturer.
2002: Society of Economic Geologists: 2002/2003 International Exchange Lecturer (selected on the basis of widely recognized research in ore deposits science).
2001: Geological Association of Canada, Mineral Deposits Division: William Harvey Gross Award (awarded to a young geologist for outstanding contributions to the field of economic geology in a Canadian context).
1996: University of Leicester Achievement Bonus Scheme award.
1995: Society of Economic Geologists: Lindgren Award (awarded for outstanding published contribution to economic geology by age 35).
1995: University of Leicester Achievement Bonus Scheme award.
1993: Australasian Institute of Mining and Metallurgy, North Queensland Branch Visiting Lecturer.
1991: Post-Doctoral Fellowship, Univ. Saskatchewan, supported by NSERC President’s Research Fund.
1986: ANU Graduate Scholarship.
1986: Canadian Institute of Mining and Metallurgy President's Gold Medal for Graduate Student Essays, M.Sc. thesis category; grant from Univ. Toronto Research Board Contingency Fund.
1984: James C. Cumming Fellowship, Trinity College (declined); Univ. Toronto Connaught Scholarship.
1983: NATO Overseas Studentship; Univ. Toronto Open Masters Fellowship (declined); James C. Cumming Fellowship, Trinity College; Junior Fellowship, Massey College.
1983: British Petroleum Book Prize; Exhibition from Sir Bartle Frere's Memorial Fund; Bundy Scholarship; Magdalene College Prize; Mynor's Bright Prize; Harkness Scholarship.
1982: Scholarship to Magdalene College, Cambridge; Natural Science Prize; Wiltshire Prize; Hart Prize.

Publications - Refereed Papers and Book Chapters

88. Richards, J.P., and Şengör, A.M.C., Did Paleo-Tethyan anoxia kill arc magma fertility for porphyry Cu formation?: Geology, v. 45, p. 591–594.

87. Zhu, J.-J., Hu, R.-Z., Richards, J.P., Bi, X.-W., Stern, R., and Lu, G., 2017, No genetic link between Late Cretaceous felsic dikes and Carlin-type Au deposits in the Youjiang basin, Southwest China: Ore Geology Reviews, v. 84, p. 328–337.

86. Richards, J.P., López, G.P., Zhu, J.-j., Creaser, R.A., Locock, A.J., and Mumin, A.H., 2017, Contrasting tectonic settings and sulfur contents of magmas associated with Cretaceous porphyry Cu±Mo±Au and intrusion-related iron oxide-Cu-Au deposits in northern Chile: Economic Geology, v. 112, p. 295–318.

85. Liu, L., Richards, J.P., Creaser, R.A., DuFrane, S.A., Muehlenbachs, K., and Larson, P.B., 2016, Geology and age of the Morrison porphyry Cu-Au-Mo deposit, Babine Lake area, British Columbia: Canadian Journal of Earth Sciences, v. 53, p. 950–978.

84. Imer, A., Richards, J.P., and Muehlenbachs, K., 2016, Hydrothermal evolution of the Çöpler porphyry-epithermal Au deposit, Erzincan Province, Central Eastern Turkey: Economic Geology, v. 111, p. 1619–1658.

83. Richards, J.P., and Sholeh, A., 2016, The Tethyan tectonic history and Cu-Au metallogeny of Iran, in Richards, J.P. ed., Tectonics and Metallogeny of the Tethyan Orogenic Belt: Society of Economic Geologists Special Publication No. 19, p. 193–212. [Editorial handling by J.W. Hedenquist]

82. Wang, R., Collins, W.J., Weinberg, R.F., Li, J.-x., Li, Q.-y., He, W.-y., Richards, J.P., Hou, Z., Zhou, L.-m., and Stern, R.A., 2016, Xenoliths in ultrapotassic volcanic rocks in the Lhasa Block: direct evidence for crust-mantle mixing and metamorphism in the deep crust: Contributions to Mineralogy and Petrology, v. 171:62, DOI 10.1007/s00410-016-1272-6.

81. Liu, L., Richards, J.P., DuFrane, S.A., and Rebagliati, M., 2016, Geochemistry, geochronology, and fluid inclusion study of the Late Cretaceous Newton epithermal gold deposit, British Columbia: Canadian Journal of Earth Sciences, v. 53, p. 10–33.

80. Hübert, J., Lee, B.M., Liu, L., Unsworth, M.J., Richards, J.P., Abbassi, B., Cheng, L.Z., Oldenburg, D.W., Legault, J.M., and Rebagliati, M., 2016, Three-dimensional imaging of a Ag-Au-rich epithermal system in British Columbia, Canada, using airborne z-axis tipper electromagnetic and ground-based magnetotelluric data: Geophysics, v. 81, p. B1–B12.

79. Oramah, I.T., Richards, J., Summers, R., Garvin, T., and McGee, T., 2015, Artisanal and small-scale mining in Nigeria: Experiences from Niger, Nasarawa and Plateau States: The Extractive Industries and Society, v. 2, p. 694–703.

78. Richards, J.P., 2015, The oxidation state, and sulfur and Cu contents of arc magmas: Implications for metallogeny: Lithos, v. 233, p. 27–45.

77. Wang, R., Richards, J.P., Zhou, L.-m., Hou, Z.-q., Stern, R.A., Creaser, R.A., and Zhu, J.-j., 2015, The role of Indian and Tibetan lithosphere in spatial distribution of Cenozoic magmatism and porphyry Cu-Mo deposits in the Gangdese belt, southern Tibet: Earth-Science Reviews, v. 150, p. 68–94.

76. Richards, J.P., 2015, Tectonic, magmatic, and metallogenic evolution of the Tethyan orogen: From subduction to collision: Ore Geology Reviews, v. 70, p. 323–345.

75. Wang, R., Richards, J.P., Hou, Z.-q., An, F., and Creaser, R.A., 2015, Zircon U-Pb age and Sr-Nd-Hf-O isotope geochemistry of the Paleocene-Eocene igneous rocks in western Gangdese: Evidence for the timing of Neo-Tethyan slab breakoff: Lithos, v. 224–225, p. 179–194.

74. Zhu, J.-j., Hu, R., Richards, J.P., Bi, X., and Zhong, H., 2015, Genesis and magmatic-hydrothermal evolution of the Yangla skarn Cu deposit, SW China: Economic Geology, v. 110, p. 631–652.

73. Imer, A., Richards, J.P., and Creaser, R.A., and Spell, T.L., 2015, The late Oligocene Cevizlidere Cu-Au-Mo deposit, Tunceli Province, eastern Turkey: Mineralium Deposita, v. 50, p. 245–263.

72. Wang, R., Richards, J.P., Hou, Z., Yang, Z., Gou, Z., and DuFrane, A., 2014, Increasing magmatic oxidation state from Paleocene to Miocene in the eastern Gangdese belt, Tibet: Implication for collision-related porphyry Cu-Mo±Au mineralization: Economic Geology, v. 109, p. 1943–1965.

71. Li, J.-X., Qin, K.-Z., Li, G.-M., Richards, J.P., Zhao, J.-X., and Cao, M.-J., 2014, Geochronology, geochemistry, and zircon Hf isotopic compositions of Mesozoic intermediate–felsic intrusions in central Tibet: Petrogenetic and tectonic implications: Lithos, v. 198–199, p. 77–91.

70. Wang, R., Richards, J.P., Hou, Z., Yang, Z., and DuFrane, S.A., 2014, Increased magmatic water content — the key to Oligo-Miocene porphyry Cu-Mo±Au formation in the eastern Gangdese belt, Tibet: Economic Geology, v. 109, p. 1315–1339.

69. Richards, J.P., 2014, Making faults run backwards: The Wilson Cycle and ore deposits: Canadian Journal of Earth Sciences, v. 51, p. 266–271.

68. Wang, R., Richards, J.P., Hou, Z., and Yang, Z., 2014, The extent of underthrusting of the Indian plate beneath Tibet controlled the distribution of Miocene porphyry Cu-Mo±Au deposits: Mineralium Deposita, v. 49, p. 165–173.

67. Richards, J.P., 2013, Giant ore deposits form by optimal alignments and combinations of geological processes: Nature Geoscience, v. 6, p. 911–916.

66. Richards, J.P., and Mumin, A.H., 2013, Lithospheric fertilization and mineralization by arc magmas: Genetic links and secular differences between porphyry copper±molybdenum±gold and magmatic-hydrothermal iron oxide-copper-gold deposits, in Colpron, M., Bissig, T., Rusk, B.G., and Thompson, J.F.H., eds., Tectonics, metallogeny, and discovery: The North American Cordillera and similar accretionary settings: Society of Economic Geologists, Special Publication 17, Ch. 9, p. 277–299.

65. Richards, J.P., and Mumin, A.H., 2013, Magmatic-hydrothermal processes within an evolving Earth: Iron oxide-copper-gold and porphyry Cu ± Mo ± Au deposits: Geology, v. 41, p. 767–770.

64. Lesage, G., Richards, J.P., Muehlenbachs, K., and Spell, T., 2013, Geochronology, geochemistry, and fluid characterization of the late Miocene Buriticá gold deposit, Antioquia Department, Colombia: Economic Geology, v. 108, p. 1067–1097.

63. Imer, A., Richards, J.P., and Creaser, R.A., 2013, Age and tectonomagmatic setting of the Eocene Çöpler-Kabataş magmatic complex and porphyry-epithermal Au deposit, east central Anatolia, Turkey: Mineralium Deposita, v. 48, p. 557–583.

62. Richards, J.P., Jourdan, F., Creaser, R.A., Maldonado, G., and DuFrane, S.A., 2013, Geology, geochemistry, geochronology, and economic potential of Neogene volcanic rocks in the Laguna Pedernal and Salar de Aguas Calientes segments of the Archibarca lineament, northwest Argentina: Jour. Volcanology & Geothermal Research, v. 258, p. 47–73.

61. Ayati, F., Yavuz, F., Asadi, H.H., Richards, J.P., and Jourdan, F., 2013, Petrology and geochemistry of calc-alkaline volcanic and subvolcanic rocks, Dalli porphyry copper-gold deposit, Markazi Province, Iran: International Geology Review, v. 55, p. 158–184.

60. Richards, J.P., Spell, T., Rameh, E., Razique, A., and Fletcher, T., 2012, High Sr/Y magmas reflect arc maturity, high magmatic water content, and porphyry Cu±Mo±Au potential: Examples from the Tethyan arcs of central and eastern Iran and western Pakistan: Economic Geology, v. 107, p. 295–332.

59. Richards, J.P., 2011, High Sr/Y arc magmas and porphyry Cu±Mo±Au deposits: Just add water: Economic Geology, v. 106, p. 1075–1081.

58. Richards, J.P., 2011, Magmatic to hydrothermal metal fluxes in convergent and collided margins: Ore Geology Reviews, v. 40, p. 1–26.

57. Davies, T., Richards, J.P., Creaser, R.A., Heaman, L.M., Chacko, T., Simonetti, A., Williamson, J., and McDonald, D.W., 2010, Paleoproterozoic age relationships in the Three Bluffs iron formation-hosted gold deposit, Committee Bay Greenstone Belt, Nunavut, Canada: Exploration and Mining Geology, v. 19, p. 55–80.

56. Lawley, C.J.M., Richards, J.P., Anderson, R.G., Creaser, R.A., and Heaman, L.M., 2010, Geochronology and geochemistry of the MAX porphyry Mo deposit and its relationship to Pb-Zn-Ag mineralization, Kootenay Arc, southeastern British Columbia, Canada: Economic Geology, v. 105, p. 1113–1142.

55. Danumah, C., Beingessner, R.L., Haque, A., Ban, F., Richards, J.P., Kovalenko, A., and Fenniri, H., 2009, Synthesis, properties, and mechanistic insight into the self-assembly of a lamellar fibrous superstructure from a synthetically simple discotic molecule: Langmuir, v. 25, p. 11857–11861.

54. Waye, A., Young, D., Richards, J.P., and Doucet, J.A., 2009, Sustainable development and mining — An exploratory examination of the roles of government and industry, in Richards, J.P., ed. (editorial handling for this chapter by Simon Handelsman), Mining, Society, and a Sustainable World: Springer-Verlag, Berlin-Heidelberg, p. 151–182.

53. Bowes-Lyon, L.-M., Richards, J.P., and McGee, T., 2009, Socio-economic impacts of the Nanisivik and Polaris mines, Nunavut, Canada, in Richards, J.P., ed. (editorial handling for this chapter by Simon Handelsman), Mining, Society, and a Sustainable World: Springer-Verlag, Berlin-Heidelberg, p. 371–396.

52. Chiaradia, M., Vallance, J., Fontboté, L., Stein, H., Schaltegger, U., Coder, J., Richards, J., Villeneuve, M., and Gendall, I., 2009, U-Pb, Re-Os, and 40Ar/39Ar geochronology of the Nambija Au-skarn and Pangui porphyry Cu deposits, Ecuador: implications for the Jurassic metallogenic belt of the Northern Andes: Mineralium Deposita, v. 44, p. 371–387.

51. Richards, J.P., 2009, Postsubduction porphyry Cu-Au and epithermal Au deposits: Products of remelting of subduction-modified lithosphere: Geology, v. 37, p. 247–250.

50. Scott, J.E., Richards, J.P., Heaman, L.M., Creaser, R.A., and Salazar, G.S., 2008, The Schaft Creek porphyry Cu-Mo-(Au) deposit, Northwestern British Columbia: Exploration and Mining Geology, v. 17, p. 163–196. [Editorial handling for this manuscript by Robert Linnen]

49. Richards, J.P., 2008, Non-renewable resources, sustainable development, and human evolution — Short story or opening chapter? Geoscience Canada, v. 35, p. 12–20.

48. Richards, J.P., and Kerrich, R., 2007, Adakite-like rocks: Their diverse origins and questionable role in metallogenesis: Economic Geology, v. 102, p. 537–576.

47. Richards, J.P., Wilkinson, D., and Ullrich, T., 2006, Geology of the Sari Gunay epithermal gold deposit, northwest Iran: Economic Geology, v. 101, p. 1455–1496, plus digital supplement.

46. Richards, J.P., 2006, The application of sustainable development principles in the minerals industry: Examples of best-practice and challenges for the future: International Journal of Interdisciplinary Social Sciences, v. 1, p. 57–67.

45. Stemler, J.U., Richards, J.P., and Muehlenbachs, K., 2006, A fluid inclusion and stable isotopic investigation of the Boston lode-gold deposit, Hope Bay volcanic belt, Nunavut: Exploration & Mining Geology, v. 15, p. 101–121.

44. Richards, J.P., Ullrich, T., and Kerrich, R., 2006, The Late Miocene–Quaternary Antofalla volcanic complex, southern Puna, NW Argentina: Protracted history, diverse petrology, and economic potential: Jour. Volcanology & Geothermal Research, v. 152, p. 197–239 (plus 3 appendices of data published on-line).

43. Richards, J.P., 2006, “Precious” metals: the case for treating metals as irreplaceable: Journal of Cleaner Production, v. 14, p. 324–333.

42. Kerrich, R., Goldfarb, R.J., and Richards, J.P., 2005, Metallogenic provinces in an evolving geodynamic framework, in Hedenquist, J.W., Thompson, J.F.H., Goldfarb, R.J., and Richards, J.P., eds., Economic Geology 100th Anniversary Volume: Littleton, CO, Society of Economic Geologists, p. 1097–1136.

41. Richards, J.P., 2005, Cumulative factors in the generation of giant calc-alkaline porphyry Cu deposits, in Porter, T.M., ed., Super porphyry copper and gold deposits: A global perspective: PGC Publishing, Adelaide, South Australia, v.1, p. 7–25.

40. Richards, J.P., 2005, The role of minerals in sustainable human development, in Marker, B.R., Petterson, M.G., McEvoy, F., and Stephenson, M.H., eds., Sustainable Minerals Operations in the Developing World: Geological Society, London, Special Publication 250, p. 25–34.
Translated into Spanish as Richards, J.P., 2006, El rol de los minerales en el desarrollo sostenible: Geotemas, No. 17, p. 50–55.

39. Richards, J.P., 2005, Challenges for sustainable mineral resources development in the 21st Century: Resource Geology, v. 55, p. 131–137.

38. Jugo, P.J., Luth, R.W., and Richards, J.P., 2005, An experimental study of the sulfur content in basaltic melts saturated with immiscible sulfide or sulfate liquids at 1300°C and 1.0 GPa: Journal of Petrology, v. 46, p. 783–798.

37. Richards, J.P., 2005, Rosia Montana gold controversy: Mining Environmental Management, January 2005, p. 5–13.

36. Jugo, P.J., Luth, R.W., and Richards, J.P., 2005, Experimental data on the speciation of sulfur as a function of oxygen fugacity in basaltic melts: Geochimica et Cosmochimica Acta, v. 69, p. 497–503.

35. Ronacher, E., Richards, J.P., Reed, M.H., Bray, C.J., Spooner, E.T.C., and Adams, P.D., 2004, Characteristics and evolution of the hydrothermal fluid in the North Zone high-grade area, Porgera gold deposit, Papua New Guinea: Economic Geology, v. 99, p. 843–867.

34. Richards, J.P., Dang, T., Dudka, S.F., and Wong, M.L., 2003, The Nui Phao tungsten-fluorite-copper-gold-bismuth deposit, northern Vietnam: An opportunity for sustainable development: Exploration & Mining Geology, v. 12, p. 61–70.

33. Richards, J.P., and Peel, D., 2003, The application of sustainable development principles to the Alberta aggregates resource sector: Exploration & Mining Geology, v. 12, p. 79–95.

32. Richards, J.P., 2003, Tectono-magmatic precursors for porphyry Cu-(Mo-Au) deposit formation: Economic Geology, v. 98, p. 1515–1533.

31. Paganelli, F., Grunsky, E.C., Richards, J.P., and Pryde, R., 2003, Use of RADARSAT-1 principal component imagery for structural mapping: a case study in the Buffalo Head Hills area, northern central Alberta, Canada: Canadian Journal of Remote Sensing, v. 29, p. 111–140.

30. Chernicoff, C.J., Richards, J.P., and Zappettini, E.O., 2002, Crustal lineament control on magmatism and mineralization in northwestern Argentina: Geological, geophysical, and remote sensing evidence: Ore Geology Reviews, v. 21, p. 127–155.

29. Paganelli, F., Richards, J.P., and Grunsky, E.C., 2002, Integration of structural, gravity, and magnetic data using the weights of evidence method as a tool for kimberlite exploration in the Buffalo Head Hills, northern central Alberta, Canada: Natural Resources Research, v. 11, p. 219–236.

28. Richards, J.P., and Villeneuve, M., 2002, Characteristics of late Cenozoic volcanism along the Archibarca lineament from Cerro Llullaillaco to Corrida de Cori, northwest Argentina: Jour. Volcanology & Geothermal Research, v. 116, p. 161–200.

27. Ronacher, E., Richards, J.P., Villeneuve, M.E., and Johnston, M.D., 2002, Short life-span of the ore-forming system at the Porgera gold deposit, Papua New Guinea: Laser 40Ar/39Ar dates for roscoelite, biotite, and hornblende: Mineralium Deposita, v. 37, p. 75–86.

26. Richards, J.P., 2002, Sustainable development and the minerals industry: Soc. Economic Geologists Newsletter, No. 48, January 2002, p. 1, 8–12. Abridged version also published in the Mining Journal, Feb. 15, 2002, p. 121–123.

25. Turner, W.A., Richards, J.P., Nesbitt, B.E., Muehlenbachs, K., and Biczok, J.L., 2001, Proterozoic low-sulfidation epithermal Au-Ag mineralization in the Mallery Lake area, Nunavut, Canada: Mineralium Deposita, v. 36, p. 442–457.

24. Richards, J.P., Boyce, A.J., and Pringle, M.S., 2001, Geological evolution of the Escondida area, northern Chile: A model for spatial and temporal localization of porphyry Cu mineralization: Economic Geology, v. 96, p. 271–305.

23. Tosdal, R.M., and Richards, J.P., 2001, Magmatic and structural controls on the development of porphyry Cu±Mo±Au deposits, in Richards, J.P., and Tosdal, R.M., eds., Structural controls on ore genesis: Society of Economic Geologists, Reviews in Economic Geology, v. 14, 157–181.

22. Richards, J.P., and Villeneuve, M., 2001, The Llullaillaco volcano, northwest Argentina: Construction by Pleistocene volcanism and destruction by sector collapse: Jour. Volcanology & Geothermal Research, v. 105, p. 77–105. Reprinted in 2004 (due to original printing errors): v. 132, p. 337–365.

21. Ronacher, E., Richards, J.P., and Johnston, M.D., 2000, Evidence for fluid phase separation in high-grade ore zones at the Porgera gold deposit, Papua New Guinea: Mineralium Deposita, v. 35, p. 683–688.

20. Richards, J.P., 2000, Lineaments revisited: Soc. Economic Geologists Newsletter, No. 42, July 2000, p. 1, 14–20.

19. Richards, J.P., Noble, S.R., and Pringle, M.S., 1999, A revised Late Eocene age for porphyry Cu magmatism in the Escondida area, northern Chile: Economic Geology, v. 94, p. 1231–1247.

18. Hedenquist, J.W., and Richards, J.P., 1998, The influence of geochemical techniques on the development of genetic models for porphyry copper deposits, in Richards, J.P., and Larson, P.B., eds., Techniques in hydrothermal ore deposits geology: Society of Economic Geologists, Reviews in Economic Geology, v. 10, ch. 10, p. 235–256.

17. Richards, J.P., and Noble, S.R., 1998, Application of radiogenic isotope systems to the timing and origin of hydrothermal processes, in Richards, J.P., and Larson, P.B., eds., Techniques in hydrothermal ore deposits geology: Society of Economic Geologists, Reviews in Economic Geology, v. 10, ch. 9, p. 195–233.

16. Campbell, I.H., Compston, D.M., Richards, J.P., Johnson, J.P., and Kent, A.J.R., 1998, Review of the application of isotopic studies to the genesis of Cu-Au mineralisation at Olympic Dam and Au mineralisation at Porgera, the Tennant Creek district and Yilgarn craton: Australian Journal of Earth Sciences, v. 45, p. 201–218.

15. Richards, J.P., 1997, Controls on scale of Porgera-type porphyry/epithermal gold deposits associated with mafic alkalic magmatism: Institution of Mining & Metallurgy Transactions, v. 106, B1–B8.

14. Richards, J.P., Bray, C.J., Channer, D.M.DeR., and Spooner, E.T.C., 1997, Fluid chemistry and processes at the Porgera gold deposit, Papua New Guinea: Mineralium Deposita, v. 32, p. 119–132.

13. Richards, J.P., 1995, Alkalic-type epithermal gold deposits—a review, in Thompson, J.F.H. (ed.), Magmas, Fluids, and Ore Deposits: Mineralogical Association of Canada, Short Course Series, v. 23, ch. 17, p. 367–400.

12. Richards, J.P., and Kerrich, R., 1993, The Porgera gold mine, Papua New Guinea: Magmatic-hydrothermal to epithermal evolution of an alkalic-type precious metal deposit: Economic Geology, v. 88, p. 1017–1052.

11. Richards, J.P., and Ledlie, I., 1993, Alkalic intrusive rocks associated with the Mt. Kare gold deposit, Papua New Guinea: Comparison with the Porgera intrusive complex: Economic Geology, v. 88, p. 755–781.

10. Richards, J.P., and Kerrich, R., 1993, Observations of zoning and fluid inclusions in pyrite using a transmitted infrared light microscope (λ ≤ 1.9 µm): Economic Geology, v. 88, p. 716–723.

9. Fedorowich, J.S., Richards, J.P., Jain, J.C., Kerrich, R., and Fan, J., 1993, A rapid method for REE and trace-element analysis using laser sampling ICP-MS on direct fusion whole-rock glasses: Chemical Geology, v. 106, p. 229–249.

8. Richards, J.P., 1992, Magmatic-epithermal transitions in alkalic systems: Porgera gold deposit, Papua New Guinea: Geology, v. 20, p. 547–550.

7. Richards, J.P., McCulloch, M.T., Chappell, B.W., and Kerrich, R., 1991, Sources of metals in the Porgera gold deposit, Papua New Guinea: evidence from alteration, isotope, and noble metal geochemistry: Geochimica et Cosmochimica Acta, v. 55, p. 565–580.

6. Richards, J.P., Chappell, B.W., and McCulloch, M.T., 1990, Intraplate-type magmatism in a continent–island-arc collision zone: Porgera intrusive complex, Papua New Guinea: Geology, v. 18, p. 958–961.

5. Richards, J.P., and McDougall, I., 1990, Geochronology of the Porgera gold deposit, Papua New Guinea: resolving the effects of excess argon on K-Ar and 40Ar/39Ar age estimates for magmatism and mineralization: Geochimica et Cosmochimica Acta, v. 54, p. 1397–1415.

4. Richards, J.P., 1990, Petrology and geochemistry of alkalic intrusives at the Porgera gold deposit, Papua New Guinea, in Hedenquist, J.W., White, N.C., and Siddeley, G. (eds.), Epithermal Gold Mineralization of the Circum-Pacific: Geology, Geochemistry, Origin and Exploration, I: Jour. Geochemical Exploration, v. 35, p. 141–199.

3. Richards, J.P., and Spooner, E.T.C., 1989, Evidence for Cu-(Ag) mineralization by magmatic-meteoric fluid mixing in Keweenawan fissure veins, Mamainse Point, Ontario: Economic Geology, v. 84, p. 360–385.

2. Richards, J.P., Cumming, G.L., Krstic, D., Wagner, P.A., and Spooner, E.T.C., 1988, Pb isotopic constraints on the age of sulfide ore deposition and U-Pb age of late uraninite veining at the Musoshi stratiform copper deposit, Central African Copperbelt, Zaire: Economic Geology, v. 83, p. 724–741.

1. Richards, J.P., Krogh, T.E., and Spooner, E.T.C., 1988, Fluid inclusion characteristics and U-Pb rutile age of late hydrothermal alteration and veining at the Musoshi stratiform copper deposit, Central African Copperbelt, Zaire: Economic Geology, v. 83, p. 118–139.