2005 | OriginalPaper | Buchkapitel
Global tectonic settings and deep mantle control on Hg and Au-Hg deposits
verfasst von : A. S. Borisenko, A. A. Obolenskiy, E. A. Naumov
Erschienen in: Mineral Deposit Research: Meeting the Global Challenge
Verlag: Springer Berlin Heidelberg
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Three main geodynamic environments are favorable for the development of ore-forming systems of Hg and Au-Hg deposits: Intracontinental rifts and aulacogens at the ancient cratons, intraplate rifting in the orogenic belts of different ages, and active continental margins of the continents. The isotope-geochemical characteristics of ore-forming systems of Hg and Au-Hg deposits, changes in
3
He/
4
Hg ratio, and paragenetic relationship between subcrustal basite and alkaline basite magmatism suggest that mantle plumes played a significant role in their formation.