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Conférence de Lyal Harris: or et minéraux critiques localisés par égouttement du manteau - 20 oct

Événements | Affiché 360 fois | Publié le jeudi 13 octobre 2022 à 12:10


Conférence (sur Zoom, en anglais) : jeudi 20 octobre à 19h00  | Seminar (on Zoom, in English) Thursday 20 October at 19:00 :
 
Au & critical mineral deposits localised by mantle drips & reactivated lithospheric-scale structures in Türkiye & E Canada
(L'Au et les minéraux critiques localisés par des égouttement du manteau et des structures à l'échelle lithosphérique réactivées en Türkiye et dans l'est du Canada)
 
Lyal Harris & Parham Adiban (INRS), Oğuz Göğüş (Istanbul Technical University),  Russell  Pysklywec (University of Toronto), & Ria Fischer (ETH Zürich)
 
Summary
Enhanced geophysical data (especially long wavelength satellite gravity) integrated with numerical models illustrate the controls on Au, REE, and many other critical mineral deposits by:
  • sub-continental lithospheric mantle (SCLM) domain margins formed by ductile dripping and rifting, and 
  • reactivated lithospheric-scale structures, commonly at a high angle to those mapped at the surface and previously unrecognised.
Examples will focus on F-REE-barite deposits in Türkiye, including the Late Oligocene Kizilçaören deposit (recently purported to contain the world’s second largest REE reserve after China) and Au and critical minerals in the Archaean Superior Province and Proterozoic Grenville Province, Canada. Comparisons will be briefly made with some other mineralised regions in S America and Norway.
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