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TitleHyperspectral reflectance spectrometry in the exploration for VMS deposits using the Izok Lake Zn-Cu-Pb-Ag deposit, Nunavut as a test site
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AuthorLaakso, K; Rivard, B; Peter, J M
SourceTargeted Geoscience Initiative 4: Contributions to the understanding of volcanogenic massive sulphide deposit genesis and exploration methods development; by Peter, J M (ed.); Mercier-Langevin, P (ed.); Geological Survey of Canada, Open File 7853, 2015 p. 15-25, https://doi.org/10.4095/296542 (Open Access)
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Peter, J M; Mercier-Langevin, P; (2015). Targeted Geoscience Initiative 4: Contributions to the understanding of volcanogenic massive sulphide deposit genesis and exploration methods development, Geological Survey of Canada, Open File 7853
File formatpdf
ProvinceNunavut
NTS86H/10
AreaIzok Lake
Lat/Long WENS-112.8333 -112.5000 65.8333 65.5000
Subjectseconomic geology; geophysics; metallic minerals; Archean; volcanogenic deposits; sulphide deposits; alteration; metamorphism; mineral assemblages; mineralization; exploration guidelines; volcanic rocks; mineral deposits; gold; remote sensing; satellite imagery; hydrothermal alteration; analytical methods; hyperspectral imagery; Precambrian
Illustrationslocation maps; plots
ProgramVolcanogenic Massive Sulfide Ore Systems, Targeted Geoscience Initiative (TGI-4)
Released2015 06 11
AbstractWe have investigated the application of ground, laboratory and airborne optical remote sensing methods to the detection of hydrothermal alteration zones associated with volcanogenic massive sulphide (VMS) deposits using the Izok Lake Zn-Cu-Pb-Ag deposit, Nunavut as a test site. The deposit is located in a subarctic environment where lichens are abundant on the rock outcrops. The rhyolitic host rocks to the deposit have been hydrothermally altered and contain white mica and chlorite group minerals. These alteration minerals have Al-OH and Fe-OH absorption features in the short-wave infrared (SWIR) wavelength region. The absorption feature wavelength positions can shift as a function of chemical compositional changes within minerals. In and around the Izok Lake deposit there are systematic trends in the Al-OH and Fe-OH absorption feature wavelength positions with distance from the massive sulphide lenses. Furthermore, these trends can be detected in bulk rock lithogeochemical data. Our results demonstrate the feasibility of using hyperspectral remotely sensed data to delineate hydrothermal alteration zones and determine alteration intensity in high-latitude regions.
GEOSCAN ID296542