Lithostratigraphic, structural and hydrothermal alteration controls on orogenic gold mineralization at the Karouni Deposit: Implications for deformation, magmatism and metallogeny in the Guiana Shield, South America

Michael Tyrrell Tedeschi

Research output: ThesisDoctoral Thesis

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Abstract

The Karouni orogenic gold deposit is located in the Guiana Shield of South America and contains approximately 1.1 Moz of gold, hosted in Rhyacian aged volcano-sedimentary rocks. Structural, geochemical and isotopic analyses were carried out
to understand the controls and origins of gold mineralization and its place within the tectonic evolution of the region. These investigations revealed a complex magmatic-hydrothermal history beginning with juvenile continental crust formation at 2200 Ma, accretion and deformation of this crust at 2110-2090 Ma and formation of strike-slip shear zones with gold-bearing quartz­carbonate veins during the waning stages of the Trans-Amazonian Orogeny at 2084 Ma.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Thesis sponsors
Award date12 Nov 2018
DOIs
Publication statusUnpublished - 2018

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