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Mapping of NiCu–PGE ore hosting ultramafic rocks using airborne and simulated EnMAP hyperspectral imagery, Nunavik, Canada

Rogge, Derek and Rivard, Benoit and Segl, Karl and Grant, Brian and Feng, Jilu (2014) Mapping of NiCu–PGE ore hosting ultramafic rocks using airborne and simulated EnMAP hyperspectral imagery, Nunavik, Canada. Remote Sensing of Environment, 152, pp. 302-317. Elsevier. DOI: 10.1016/j.rse.2014.06.024 ISSN 0034-4257

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Official URL: http://dx.doi.org/10.1016/j.rse.2014.06.024

Abstract

This study first investigates using AISA airborne hyperspectral imagery (2 m spatial resolution) to produce detailed lithologic maps in a subarctic region (Nunavik, Canada) where ultramafic rock units associated with Ni–Cu-(PGE) mineralization are exposed in the presence of lichen coatings. Twenty AISA flight-lines were radiometrically leveled and merged to form a 10 × 20 km mosaic, which then served to generate a simulated spaceborne EnMAP scene (30 m spatial resolution) using the End-to-End Simulation Tool to assess the sensors mapping capabilities. Spatial Spectral Endmember Extraction was used to derive spectral endmembers for the AISA and EnMAP data. Image endmemberswere comparedwith spectralmeasurements of field samples to assess how well key rock typeswere represented. Results showthat the AISA imagery provided a better representation of mafic and ultramafic rock types compared with the EnMAP simulation. Endmembers were then used to map the distribution of geological materials using Iterative Spectral Mixture Analysis. Results indicate the airborne data provided more detailed maps compared with EnMAP simulated data. However, EnMAP data could still discriminate and map broad scale lithological units, specifically mafic and ultramafic rocks. This study demonstrates the feasibility of EnMAP to provide large scale reconnaissance mapping capability of geologic materials over vast subarctic and arctic regions (potentially 30 × 5000 km of imagery per day) using expert knowledge combined with automated spectral analysis methods.

Item URL in elib:https://elib.dlr.de/92958/
Document Type:Article
Title:Mapping of NiCu–PGE ore hosting ultramafic rocks using airborne and simulated EnMAP hyperspectral imagery, Nunavik, Canada
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rogge, Derekderek.rogge (at) dlr.deUNSPECIFIED
Rivard, Benoitbenoit.rivard (at) ualberta.caUNSPECIFIED
Segl, Karlsegl (at) gfz-potsdam.deUNSPECIFIED
Grant, BrianUNSPECIFIEDUNSPECIFIED
Feng, Jilujfeng (at) ualberta.caUNSPECIFIED
Date:2014
Journal or Publication Title:Remote Sensing of Environment
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:152
DOI :10.1016/j.rse.2014.06.024
Page Range:pp. 302-317
Publisher:Elsevier
Series Name:Elsevier
ISSN:0034-4257
Status:Published
Keywords:Hyperspectral AISA EnMAP Geological mapping
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Rogge, Derek
Deposited On:04 Dec 2014 14:37
Last Modified:10 Jan 2019 15:50

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