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Characterizing Kimberlite Dilution by Crustal Rocks at the Snap Lake Diamond Mine (Northwest Territories, Canada) using SWIR (1.90–2.36 μm) and LWIR (8.1–11.1 μm) Hyperspectral Imagery Collected from Drill Core

Tappert, Michelle and Rivard, Benoit and Fulop, Alexandrina and Rogge, Derek and Feng, Jilu and Tappert, Ralf and Stalder, Roland (2015) Characterizing Kimberlite Dilution by Crustal Rocks at the Snap Lake Diamond Mine (Northwest Territories, Canada) using SWIR (1.90–2.36 μm) and LWIR (8.1–11.1 μm) Hyperspectral Imagery Collected from Drill Core. Economic Geology, 110 (6), pp. 1375-1387. Society of Economic Geologists. DOI: 10.2113/econgeo.110.6.1375 ISSN 0361-0128

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Official URL: http://econgeol.geoscienceworld.org

Abstract

Short-wave infrared (SWIR, 1.90–2.36 μm) and long-wave infrared (LWIR, 8.1–11.1 μm) hyperspectral images collected using the SisuROCK system were used to develop an automated methodology for generating kimberlite dilution maps. Smoothed and denoised images from two Snap Lake (Northwest Territories, Canada) kimberlite drill cores were processed, and SWIR and LWIR spectral endmembers were extracted from the images with each mineralogical endmember assigned to one of four compositional groups: undiluted kimberlite, microdiluted kimberlite, micro- and macrodiluted kimberlite, and crustal rocks. These endmembers were used to classify the SWIR and LWIR images, and the results were validated using linescan data, drill core logs, petrology reports, and the results of X-ray diffraction, Raman spectroscopy, and Micro-Fourier Transform Infrared (FTIR) spectroscopy. This study demonstrates that hyperspectral imagery can be used to generate dilution maps for hypabyssal kimberlites that far supersede other current techniques in terms of spatial resolution.

Item URL in elib:https://elib.dlr.de/98032/
Document Type:Article
Title:Characterizing Kimberlite Dilution by Crustal Rocks at the Snap Lake Diamond Mine (Northwest Territories, Canada) using SWIR (1.90–2.36 μm) and LWIR (8.1–11.1 μm) Hyperspectral Imagery Collected from Drill Core
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Tappert, MichelleDepartment of Earth and Atmospheric Sciences, University of Alberta, Edmonton, CanadaUNSPECIFIED
Rivard, BenoitDepartment of Earth and Atmospheric Sciences, University of AlbertaUNSPECIFIED
Fulop, AlexandrinaDe Beers CanadaUNSPECIFIED
Rogge, Derekderek.rogge (at) dlr.deUNSPECIFIED
Feng, Jilujfeng (at) ualberta.caUNSPECIFIED
Tappert, RalfMineralogy and Petrography, University of InnsbruckUNSPECIFIED
Stalder, RolandTNT Mineral ScienceUNSPECIFIED
Date:September 2015
Journal or Publication Title:Economic Geology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:110
DOI :10.2113/econgeo.110.6.1375
Page Range:pp. 1375-1387
Publisher:Society of Economic Geologists
ISSN:0361-0128
Status:Published
Keywords:Imaging spectroscopy, Kimberlite dilution, Geology
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:02 Sep 2015 08:39
Last Modified:17 Nov 2018 05:02

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