Geochemical and isotopic characterisation of mafic intrusions in the Fraser Zone, Western Australia

Kathleen Bathgate

Research output: ThesisMaster's Thesis

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Abstract

The Albany-Fraser Orogen records widespread mafic/ultramafic magmatism in the Fraser Zone, which hosts the magmatic Ni-Cu deposit, Nova-Bollinger. Seven prospects containing mafic/ultramafic intrusives in the Fraser Zone were analysed to determine how they compare to Nova-Bollinger and if they are prospective for magmatic sulfide deposits. Broadly, similar trace element data suggest these intrusions are formed from a similar source which may be consistent with subduction modified mantle intruding into a back-arc/rift environment. Negative ENd suggest varying degrees of crustal contamination, whilst S isotopes also display some crustal signatures and possible incorporation of Archean MIF bearing Δ33S. The greatest difference between regional prospects and Nova-Bollinger is in the olivine chemistry with differences in partial melting and sulfide segregation. These differences potentially being responsible for Nova's economic sulfides and the relatively barren intrusions studied regionally.
Original languageEnglish
QualificationMasters
Awarding Institution
  • The University of Western Australia
Supervisors/Advisors
  • Fiorentini, Marco, Supervisor
  • Denyszyn, Steven, Supervisor
Award date5 Jul 2019
DOIs
Publication statusUnpublished - 2019

Embargo information

  • Embargoed from 18/11/2019 to 18/11/2020. Made publicly available on 18/11/2020.

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