Integrating a Minerals Systems Approach with Machine Learning: A Case Study of ‘Modern Minerals Exploration’ in the Mt Woods Inlier – northern Gawler Craton, South Australia

Author(s): 
Mark Rieuwers
Date: 
Wednesday, September 4, 2019
First presented: 
AEGC 2019
Type: 
Published paper
Category: 
Geology

There has been extensive exploration in the Mt Woods inlier in the northern Gawler Craton, South Australia since the 1960s, particularly for iron oxide-copper-gold (IOCG) mineralisation since the 1975 super giant Olympic Dam IOCG-U discovery by Western Mining Corporation ~150 km to the SE.

IOCG discoveries in the Gawler Craton have been largely made based on targeted discrete magnetic and/or gravity anomalies since the advent of regional geophysical datasets. Only one significant economic discovery has been made in the Mt Woods inlier – the Prominent Hill metasediment-hosted IOCG deposit in 2001 by Minotaur Resources, with no subsequent economic mineralisation encountered elsewhere in the inlier.

In an effort to accelerate the discovery of a new economic deposit, OZ Minerals opened up more than 2TB of their private geoscience data to external participants as part of the ‘Explorer Challenge’ competition in early 2019. Once registered, participants had 3 months to use the data provided, along with what was already in the public domain, to attempt to predict where the next mineral deposit in the Mt Woods inlier might be.

Integrating a minerals systems approach with machine learning (ML) has allowed the development of a series of conceptual models for targeting a range of deposit types and commodities. Exploration success based on this modern targeting approach will eventually lead to new suitable exploration strategies to discover the next generation of economic mineral deposits, particularly those concealed under cover.

Feature Author

Mark Rieuwers

Mark Rieuwers has 13 years’ experience in the mining and exploration industry, mainly working on nickel-sulphides, but including work on copper-gold and gold systems. Mark’s PhD work concentrated on the application of structural geology, metamorphic petrology and geochronology to help understand complex tectonics. During his years in the industry, he has focused on integrating mineral systems geoscience, structural geology, geochemistry and geophysics in driving effective exploration strategies, applying 3D geological and structural modelling to help understand and define complex mineral systems. Mark’s interests lie in combining field studies and desktop interpretations and implicit 3D modelling in greenfields and brownfields environments, including on-site training in 3D modelling and structural geology.

Senior Consultant (Geology)
PhD (Geology), BSc (Hons) (First Class Geology), Bsc (Geology)
SRK Perth
SRK Africa