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Prospectivity analysis using a mineral systems approach - Capricorn case study project (RP04-063-M436)
Opening up greenfields regions for minerals exploration programs is best facilitated through the understanding of regional minerals prospectivity. The Capricorn Orogen is a greenfields region, in which a multicommodity mineral systems analysis has been completed forming the basis of prospectivity analyses and mapping data included in this collectio... moren. Known mineral occurrences or deposits in the region formed from between the Paleoproterozoic and Neoproterozoic. Mineralisation can in related to basin development and orogenesis in the region, related to periods of supercontinent assembly and breakup that were manifested in the region through the contractional 2005 – 1950 Ma Glenburgh, 1830 –1780 Ma Capricorn, and c. 900 Ma Edmundian orogenies. These periods were preceded, and interspersed with periods of extension that may have included the 1680–1620 Mangaroon Orogeny, and led to the development of volcanosedimentary and sedimentary basins throughout the region. Prospectivity models were generated for several commodity groups of various ages and ore genesis mechanisms within the region that include combinations of Ni, Cu, PGEs, V, Ti, Au, Pb, Zn, channel Fe and U. The work has found a link between key mineral systems and a spatial relationship between disparate styles of mineral deposits in the region. Crustal-scale tectonic architecture was analysed by allying a 2D map view geological-geophysical interpretation with 2.5D magnetic and gravity joint inversions of selected profiles, a 3D Moho gravity inversion (MoGGIE), and inferences derived from 2D and 3D magnetotellurics and 2D reflection seismic and 3D passive seismic experiment conducted in the region. This work clearly illustrates different ‘zones’ of the Capricorn Orogen are prospective for diverse commodity groups due to the tectonic environment in which they developed through time. Major crustal-scale faults or shear zones that intrinsically control the location of known ore deposits in the area, are implied to be sites of fluid migration and proximal to sites of ore deposition. Of these, some are considered to be Archean in their origin, whereas others are thought to have developed during the early Paleoproterozoic and been re-activated through time, influence the formation of basins over them and perhaps the formation of ore deposits. less
Geology not elsewhere classified
01 Jan 2014
31 Jan 2018
Mineral Systems Analysis
Creative Commons Attribution 4.0 International Licence
CSIRO (Australia), University of Western Australia, centre for Exploration Targeting (Australia)
Occhipinti, Sandra; Lindsay, Mark; Aitken, Alan; Metelka, Vasek; Pirajno, Franco; Aurore, Joly; Uren, Ashley; Lampinen, Heta; Ramos, Lara; Tyler, Ian; Miller, John; McCuaig, Cam (2018): Prospectivity analysis using a mineral systems approach - Capricorn case study project (RP04-063-M436). v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2018.
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SIEF Distal Footprints
The Capricorn Orogeny, in the north of Western Australia, is the subject of study in this overarching project which has been scoped to define distal footprints of ore systems under cover and how to detect them. This area of known mineral potential has received limited research attention despite that it lies between the Pilbara and Yilgarn Cratons,... more two of the most significant mineral economic regions in the world. In the area, there are some large known deposits (Plutonic, Degrussa, Paulsens, Abra), and other ore systems for a range of commodities including Fe, Au, Cu, Zn, U and Pb. The region is characterised by a complex geological evolution, a paucity of outcrop and a complex regolith cover, which together present a considerable exploration challenge. Thus, the project aims to establish the evolution of Capricorn mineral systems, within the context of tectonically complex geological history, and provide a detailed examination of the extensive cover sequences that both hinder our ability to detect ore deposits but also present an opportunity to host them (e.g. CID, channel U, supergene Au). We have aimed at developing exploration approaches and appropriate toolkits that improve the ability to prospect under cover. The approach has been to integrate regional- and lithospheric-scale datasets with prospect scale focused studies to determine and develop scale-dependent criteria for the recognition of the distal footprints of ore systems. Some prospect-scale study areas have be defined through discussion with relevant industry partners. The outcomes will not only be directly applicable to the Capricorn region but will undoubtedly be of relevance for exploration in covered terrains elsewhere. The project represents a and exciting collaboration between internationally recognized, multi-disciplinary researchers in a team comprising several scientists from the CET at UWA, Applied Geology at Curtin and the Discovery Theme of CSIRO. less
Mineral Systems Analysis
Conducting geological investigations, identification of critical components of mineral systems, creating proxy spatial information, creating a spatial model