Ore Genesis

Description

The Ore Genesis Group studies the geochemistry and structural controls on the development of fluid pathways in ore deposits with the aim of understanding their origin.  Emphasis is placed on Archean gold deposits and porphyry associated copper-gold systems.

Publications

  • Campbell, I. H., O'Neill H. St. C. (2012) Evidence against a chondritic Earth.  Nature, 483: 553-558,  DOI 10.1038/nature10901.
  • Campbell, I.H. and Griffiths, R.W. (1990) Implications of mantle plume structure for the evolution of flood basalts. Earth Planet. Sci. Lett. 99: 79-93.
  • Campbell, I.H., Griffiths, R.W. and Hill, R.I. (1989) Melting in an Archaean mantle plume: heads it's basalts, tails it's komatiites. Nature. 339: 697-699..
  • Campbell, I.H. and A.J. Naldrett.  (1979) The influence of silicate: sulfide ratios on the geochemistry of magmatic sulfides.  Econ. Geol., 74, 1503-1506.
  • Campbell, I.H., Naldrett, A.J. and Barnes, S.J. (1983) A model for the origin of the platinum-rich sulfide horizons in the Bushveld and Stillwater Complexes. J. Petrol. 24: 133-165.
  •  Cox, S.F., 2005. Coupling between deformation processes, fluid pressures and fluid flow in ore-producing hydrothermal environments.  Economic Geology, 1200th Anniversary volume, 39 - 75.
  • Cox, S.F., 2007. Structural and isotopic constraints on fluid flow regimes and fluid pathways during upper crustal deformation: An example from the Taemas area of the Lachlan Orogen, SE Australia, Journal of  Geophysical Research, 112, B08208, doi:10.1029/2006JB004734.
  • Cox, S.F., 2010. The application of failure mode diagrams for exploring the roles of fluid pressure and stress states in controlling styles of fracture-controlled permeability enhancement in faults and shear zones.  Geofluids, 10 (1-2), 217-233. doi:10.1111/j.1468-8123.2010.00281.x.
  • Arndt, M., Virgo, S., Cox, S.F. & Urai, J.L., accepted.  Changes in fluid pathways in a calcite vein mesh (Natih Formation, Oman Mountains): Insights from stable isotopes.  Geofluids. in press.
  • Jenner FE, O’Neill HSC, Arculus RJ and Mavrogenes JA (2010) The magnetite crisis in the evolution of arc-related magmas and the initial concentration of Au, Ag and Cu. Journal of Petrology, v. 51, p. 2445-2464.
  • Peterson EC and Mavrogenes JA (2014) Linking high-grade gold mineralisation to earthquake-induced fault-valve processes in the Porgera gold deposit, Papua New Guinea. Geology, published online March 17, DOI: 10.1130/G35286.1
  • Mavrogenes JA, Henley RW, Reyes AC, Berger B (2010) Sulfosalt melts: evidence of high temperature vapor transport of metals in the formation of high sulfidation lode gold deposits. Economic Geology, v. 105, p. 257-262.
  • Mavrogenes, JA and O'Neill, HS (1999) The relative effects of pressure, temperature and oxygen fugacity on the solubility of sulfide in mafic magmas. Geochimica et Cosmochimica Acta, v. 63, p. 1173-1180
  • Loucks, RR and Mavrogenes, JA (1999) Gold solubility in supercritical hydrothermal brines measured in synthetic fluid inclusions. Science, v. 284, p. 2159-2163.

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