Jason Harvey
University of Leeds
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2015 AGU Fall Meeting | 2016
Jason Harvey; James M. D. Day
In high-temperature geochemistry and cosmochemistry, highly siderophile and strongly chalophile elements can be defined as strongly preferring metal or sulfide, respectively, relative to silicate or oxide phases. The highly siderophile elements (HSE) comprise Re, Os, Ir, Ru, Pt, Rh, Pd, and Au and are defined by their extreme partitioning (> 104) into the metallic phase, but will also strongly partition into sulfide phases, in the absence of metal. The HSE are highly refractory, as indicated by their high melting and condensation temperatures and were therefore concentrated in early accreted nebular materials. Within the HSE are the platinum-group elements (PGE), which include the six elements lying in the d -block of the periodic table (groups 8, 9, and 10, periods 5 and 6), i.e., Os, Ir, Ru, Pt, Rh and Pd. These six elements tend to exist in the metallic state, or bond with chalcogens (S, Se, Te) or pnictogens (P, As, Sb, Bi). Rhenium and Au do not necessarily behave as coherently as the PGE, due to their differing electronegativity and oxidation states. For these reasons, a clear definition between the discussion of the PGE and the HSE (PGE, Re and Au) exists in the literature, especially in economic geology, industrial, or bio-medical studies. The strongly chalcophile elements can be considered to include S, Se, and Te. These three elements are distinguished from other chalcophile elements, such as Cd or Pb, because, like the HSE, they are all in very low abundances in the bulk silicate Earth (Fig. 1). By contrast with the HSE, S, Se, and Te all have far lower melting and condensation temperatures, classifying them as highly volatile elements (Table 1). Moreover, these elements are not equally distributed within chondrite meteorite groups (Fig. 2). Since their initial distribution in the Solar nebula, planetary formation and differentiation …
Geochemistry Geophysics Geosystems | 2004
Wolfgang Bach; Carlos J. Garrido; Holger Paulick; Jason Harvey; Martin Rosner
Chemical Geology | 2006
Holger Paulick; Wolfgang Bach; Marguerite Godard; J.C.M. de Hoog; G. Suhr; Jason Harvey
Earth and Planetary Science Letters | 2006
Jason Harvey; Abdelmouhcine Gannoun; Kevin W. Burton; Nick W. Rogers; Olivier Alard; Ian J. Parkinson
Earth and Planetary Science Letters | 2008
Marguerite Godard; Yves Lagabrielle; Olivier Alard; Jason Harvey
Chemical Geology | 2009
Jason Harvey; Ethan F. Baxter
Geochimica et Cosmochimica Acta | 2011
Jason Harvey; Christopher W. Dale; Abdelmouhcine Gannoun; Kevin W. Burton
Geochimica et Cosmochimica Acta | 2010
Jason Harvey; Abdelmouhcine Gannoun; Kevin W. Burton; Pierre Schiano; Nick W. Rogers; Olivier Alard
Earth and Planetary Science Letters | 2013
Julie Prytulak; Sune G. Nielsen; Dmitri A. Ionov; Alex N. Halliday; Jason Harvey; Katherine A. Kelley; Yaoling Niu; David W. Peate; Kenji Shimizu; Kenneth W.W. Sims
Nature Geoscience | 2012
Kevin W. Burton; Bénédicte Cenki-Tok; Fatima Mokadem; Jason Harvey; Abdelmouhcine Gannoun; Olivier Alard; Ian J. Parkinson