Title: Delineating Alteration Footprints from Field and ASTER SWIR Spectra, Geochemistry, and Gamma-Ray Spectrometry above Regolith-Covered Base Metal Deposits—An Example from Abra, Western Australia☼
Abstract: Research Article| December 01, 2017 Delineating Alteration Footprints from Field and ASTER SWIR Spectra, Geochemistry, and Gamma-Ray Spectrometry above Regolith-Covered Base Metal Deposits—An Example from Abra, Western Australia☼ Heta M. Lampinen; Heta M. Lampinen 1Centre for Exploration Targeting, School of Earth Sciences, The University of Western Australia, Australian Research Council Centre of Excellence for Core to Crust Fluid Systems (CCFS), 35 Stirling Highway, Robert Street Building, Perth, WA 6009, Australia †Corresponding author: e-mail, [email protected]; [email protected] Search for other works by this author on: GSW Google Scholar Carsten Laukamp; Carsten Laukamp 2CSIRO Mineral Resources, 26 Dick Perry Avenue, Kensington, WA 6151, Australia Search for other works by this author on: GSW Google Scholar Sandra A. Occhipinti; Sandra A. Occhipinti 1Centre for Exploration Targeting, School of Earth Sciences, The University of Western Australia, Australian Research Council Centre of Excellence for Core to Crust Fluid Systems (CCFS), 35 Stirling Highway, Robert Street Building, Perth, WA 6009, Australia Search for other works by this author on: GSW Google Scholar Václav Metelka; Václav Metelka 2CSIRO Mineral Resources, 26 Dick Perry Avenue, Kensington, WA 6151, Australia Search for other works by this author on: GSW Google Scholar Samuel C. Spinks Samuel C. Spinks 2CSIRO Mineral Resources, 26 Dick Perry Avenue, Kensington, WA 6151, Australia Search for other works by this author on: GSW Google Scholar Economic Geology (2017) 112 (8): 1977–2003. https://doi.org/10.5382/econgeo.2017.4537 Article history accepted: 02 Sep 2017 first online: 15 Nov 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Heta M. Lampinen, Carsten Laukamp, Sandra A. Occhipinti, Václav Metelka, Samuel C. Spinks; Delineating Alteration Footprints from Field and ASTER SWIR Spectra, Geochemistry, and Gamma-Ray Spectrometry above Regolith-Covered Base Metal Deposits—An Example from Abra, Western Australia. Economic Geology 2017;; 112 (8): 1977–2003. doi: https://doi.org/10.5382/econgeo.2017.4537 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEconomic Geology Search Advanced Search Abstract Shortwave infrared (SWIR) field and laboratory reflectance spectra were used to identify and characterize mineral assemblages in regolith within a study area around the Abra base metal deposit. The Abra deposit is situated at 300-m depth from surface and hosted by weathered sedimentary rocks of the Mesoproterozoic Edmund Group of the Capricorn Orogen of Western Australia. The deposit contains a chlorite-siderite (±white mica) alteration halo delineated from drill core, surrounded with host rocks that are modally poor in detrital and metamorphic chlorite and white mica. Mineral assemblages identified from the regolith SWIR data, which were verified through XRD analysis and preexisting geochemistry data, were used to identify three schematic SWIR mineral domains in the regolith. These domains are (1) poorly crystalline kaolinite in an extremely weathered transported regolith, (2) well-crystalline kaolinite and muscovite in regolith overlying unaltered bedrock, and (3) phengite ± chlorite ± well-crystalline kaolinite mineral footprint in regolith overlying the Abra deposit and nearby base metal prospects. Furthermore, we identified that the mineral footprint detected from regolith samples can be traced in a combined potassium gamma-ray spectrometry and ASTER AlOH group composition map. The combined use of mineralogical and geophysical remote sensing data, and the strategically planned ground validation through mineralogical and geochemical sampling, proved to be a powerful and cost-effective exploration method for regional mapping of mineral footprints potentially related to sedimentary rock-hosted base metal. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2017
Publication Date: 2017-11-15
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 23
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