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Prospectivity Mapping for Epithermal Deposits of Western Milos Using a Fuzzy Multi Criteria Evaluation Approach Parameterized by Airborne Hyperspectral Remote Sensing Data

1
Department of Geographical, Environment and Earth Sciences, University of Hull, Hull HU6 7RX, UK
2
Institute of Geodynamics, National Observatory of Athens, Lofos Nymfon, Thission, P.O. Box 20048, 11810 Athens, Greece
3
Geography and Earth Systems Science, University of Derby, Kedleston Road, Derby DE22 1GB, UK
4
School of Earth Sciences, University of Bristol, Bristol BS8 1TH, UK
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(3), 116; https://doi.org/10.3390/geosciences9030116
Received: 12 January 2019 / Revised: 28 February 2019 / Accepted: 28 February 2019 / Published: 7 March 2019
(This article belongs to the Special Issue Magmatic-Hydrothermal Ore Deposits)
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Abstract

A Mineral prospectivity mapping (MPM) approach using a GIS-based weighted linear combination implementation of a Multi-Criteria Evaluation approach utilising a fuzzy Analytical Hierarchy Process to elucidate expert knowledge has been implemented to analyse the spatial distribution of epithermal deposits on the Island of Milos, Greece and model their association with exploration evidence data with the aim of providing insights into the controls on ore deposition. An integrated field and Digital Airborne Imaging Spectrometer (DAIS) hyperspectral and thermal multispectral airborne remote sensing dataset supported by field mapping and laboratory analyses, has been utilised to resolve hydrothermal alteration and parameterise the MPM. This study has highlighted the intimate spatial relationship between topographic highs and locations with high grade silicified alteration at a number of locations. The ability of high spatial resolution multispectral Thermal InfraRed (TIR) remote sensing imagery, integrated with topographic data, to resolve these silicified topographic highs provides an additional tool in the exploration of epithermal deposits. The spatial relationships between silicified lithocaps, high-grade altered rocks, faulting and topographic highs were utilised in the development of the MPM model. A close association between the modelled results and the hydrothermal alteration mapped in the field supports the accuracy of this MPM approach. View Full-Text
Keywords: hydrothermally altered rocks; Milos; DAIS; SWIR; TIR; remote sensing; topography hydrothermally altered rocks; Milos; DAIS; SWIR; TIR; remote sensing; topography
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Ferrier, G.; Ganas, A.; Pope, R.; Jo Miles, A. Prospectivity Mapping for Epithermal Deposits of Western Milos Using a Fuzzy Multi Criteria Evaluation Approach Parameterized by Airborne Hyperspectral Remote Sensing Data. Geosciences 2019, 9, 116.

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