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National Virtual Core Library HyLogging data and Ni-Co laterites: a mineralogical model for resource exploration, extraction and remediation

Citation

Cracknell, MJ and Jansen, NH, National Virtual Core Library HyLogging data and Ni-Co laterites: a mineralogical model for resource exploration, extraction and remediation, Australian Journal of Earth Sciences, 63, (8) pp. 1053-1067. ISSN 0812-0099 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Geological Society of Australia

DOI: doi:10.1080/08120099.2016.1246476

Abstract

The National Virtual Core Library (NVCL) HyLogging core-scanning system generates mineralogical information from visible, short-wave infrared and thermal infrared spectroscopic data. Currently, HyLogging data are freely available for more than 1500 drill holes via the AuScope Discovery Portal and various Geological Survey websites. With any new technology, there is commonly a lag between provision and take-up by users that can be aided by the publication of case studies in the scientific literature. This paper uses the Mt Davies nickel–cobalt (Ni–Co) laterite deposits, located in northwest South Australia, as a case study to assess the accessibility and representation of HyLogger data and provides an example of its application to all aspects of resource mining: exploration, extraction and processing, and remediation. In this study, we combine HyLogger-derived scalars indicating Fe-oxide and clay mineralogy with historical geological logs and assay data. In general, background Ni grades (<0.1 wt%) are linked to the presence of montmorillonite + hematite ± goethite, moderate grades (0.1–1.0 wt%) are associated with goethite ± nontronite ± saponite ± kaolinite ± montmorillonite, and higher grades (1.0–2.0 wt%) are coincident with goethite and minimal clay alteration, suggesting that goethite hosts Ni mineralisation. Gibbsite, where it occurs, is found immediately above zones of moderate to high Ni grades and may be an important proximal indicator mineral of nickeliferous laterite. Such a case study serves to suggest opportunities for further data modelling and search and query functionality that could facilitate increased use of this important digital geoscience data resource by the Australian minerals industry for all aspects of resource exploitation: exploration, extraction, processing, and environmental remediation.

Item Details

Item Type:Refereed Article
Keywords:National Virtual Core Library; HyLogging; HyLogger; Ni–Co laterites; mineralogy; Feoxide; clay
Research Division:Earth Sciences
Research Group:Geology
Research Field:Mineralogy and Crystallography
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Primary Mining and Extraction Processes of Mineral Resources
Objective Field:Primary Mining and Extraction of Mineral Resources not elsewhere classified
Author:Cracknell, MJ (Dr Matthew Cracknell)
Author:Jansen, NH (Dr Nic Jansen)
ID Code:115031
Year Published:2016
Web of Science® Times Cited:1
Deposited By:CODES ARC
Deposited On:2017-03-06
Last Modified:2017-11-06
Downloads:0

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