Multi-scale spacing and endowment of orogenic gold deposits

Raphael Doutre, Steven Micklethwaite, Peter Kovesi, Campbell T McCuaig, Arianne Ford, Nick Hayward

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

We provide the first multi-scale analysis of the spacing and endowment of orogenic gold deposits along major faults using wavelet analysis. We find a remarkable hierarchical structure exists. At the most basic level there are distinct differences between mineralised faults, with spacing between camps at 14-20 km or 30-40 km, depending on the fault. At broader scales, systematic variations in endowment show that highly endowed camps cluster over distances of 40-70 km, and the spacing between these clusters is~ 100 km. Further, the endowment characteristics along faults can be either simple, with one scale of clustering, or complex, with several nested scales of clustering. Our results suggest that the mineral system is controlled by the interaction of several self-organising processes across multiple scales (for example fault mechanics interacting with regional metamorphic devolatilisation and magma ascent). These complex hierarchical patterns imply there is a hydrological connection between different self-organising systems in the crust.
Original languageEnglish
Title of host publication2015 Nancy
Subtitle of host publicationMineral Resources in a Sustainable World
PublisherSociety for Geology Applied to Mineral Deposits
Pages81-84
Number of pages4
Volume1
ISBN (Electronic)978-2-85555-065-7
Publication statusPublished - 2015
Externally publishedYes

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