Mapping alteration minerals at prospect, outcrop and drill core scales using imaging spectrometry
Fred A. Kruse,Richard L. Bedell,James V. Taranik,William A. Peppin,Oliver Weatherbee,Wendy M. Calvin +5 more
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TLDR
Analysis results using standardized hyperspectral methodologies demonstrate rapid extraction of representative mineral spectra and mapping of mineral distributions and abundances in map-plan, with core depth, and on the mine walls.Abstract:
Imaging spectrometer data (also known as ‘hyperspectral imagery’ or HSI) are well established for detailed mineral mapping from airborne and satellite systems. Overhead data, however, have substantial additional potential when used together with ground-based measurements. An imaging spectrometer system was used to acquire airborne measurements and to image in-place outcrops (mine walls) and boxed drill core and rock chips using modified sensor-mounting configurations. Data were acquired at 5 nm nominal spectral resolution in 360 channels from 0.4 to 2.45 μm. Analysis results using standardized hyperspectral methodologies demonstrate rapid extraction of representative mineral spectra and mapping of mineral distributions and abundances in map-plan, with core depth, and on the mine walls. The examples shown highlight the capabilities of these data for mineral mapping. Integration of these approaches promotes improved understanding of relations between geology, alteration and spectral signatures in three dime...read more
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Mapping Advanced Argillic Alteration at Cuprite, Nevada, Using Imaging Spectroscopy
Gregg A. Swayze,Roger N. Clark,Alexander F. H. Goetz,K. Eric Livo,George N. Breit,Fred A. Kruse,Stephen J. Sutley,Lawrence W. Snee,Heather A. Lowers,James L. Post,Roger E. Stoffregen,Roger P. Ashley +11 more
TL;DR: In this article, the authors used the Tetracorder spectral-shape matching system to study late Miocene advanced argillic alteration at Cuprite, Nevada, and found that the presence of dickite, halloysite, and well-ordered kaolinite is consistent with acidic conditions during hydrothermal alteration.
Journal ArticleDOI
A review on spectral processing methods for geological remote sensing
TL;DR: A novel categorization scheme is proposed that groups the techniques into knowledge-based and data-driven approaches, according to the type and availability of reference data, to yield some of the most robust processing techniques available to multi- and hyperspectral remote sensing.
Journal ArticleDOI
A Machine Learning Framework for Drill-Core Mineral Mapping Using Hyperspectral and High-Resolution Mineralogical Data Fusion
Isabel Cecilia Contreras Acosta,Mahdi Khodadadzadeh,Laura Tusa,Pedram Ghamisi,Richard Gloaguen +4 more
TL;DR: The ability of the proposed technique to fuse and up-scale high-resolution mineralogical analysis with drill-core HS data is demonstrated, qualitatively and quantitatively.
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Integration of Terrestrial and Drone-Borne Hyperspectral and Photogrammetric Sensing Methods for Exploration Mapping and Mining Monitoring
Moritz Kirsch,Sandra Lorenz,Robert Zimmermann,Laura Tusa,Robert Möckel,Philip Hödl,René Booysen,Mahdi Khodadadzadeh,Richard Gloaguen +8 more
TL;DR: The combination of ground- and drone-based photogrammetric and hyperspectral VNIR, SWIR, and LWIR imaging allows for safer and more efficient ground surveys, as well as a better, statistically sound sampling strategy for further structural, geochemical, and petrological investigations.
Journal ArticleDOI
Imaging spectroscopy of geological samples and outcrops: Novel insights from microns to meters
Rebecca N. Greenberger,John F. Mustard,Bethany L. Ehlmann,Diana L. Blaney,Edward A. Cloutis,Janette H. Wilson,Robert O. Green,Abigail A. Fraeman +7 more
TL;DR: In this article, the authors present a review of the potential of image spectroscopy in the field of geology and present four examples showing the exciting science potential and new insights into geological processes.
References
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