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Article

Mineral Mapping and Vein Detection in Hyperspectral Drill-Core Scans: Application to Porphyry-Type Mineralization

1
Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany
2
Eldorado Gold Corporation, 330034 Deva, Romania
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(2), 122; https://doi.org/10.3390/min9020122
Received: 23 January 2019 / Revised: 12 February 2019 / Accepted: 16 February 2019 / Published: 19 February 2019
(This article belongs to the Special Issue Hyperspectral Imaging for Mineral Mapping)
The rapid mapping and characterization of specific porphyry vein types in geological samples represent a challenge for the mineral exploration and mining industry. In this paper, a methodology to integrate mineralogical and structural data extracted from hyperspectral drill-core scans is proposed. The workflow allows for the identification of vein types based on minerals having significant absorption features in the short-wave infrared. The method not only targets alteration halos of known compositions but also allows for the identification of any vein-like structure. The results consist of vein distribution maps, quantified vein abundances, and their azimuths. Three drill-cores from the Bolcana porphyry system hosting veins of variable density, composition, orientation, and thickness are analysed for this purpose. The results are validated using high-resolution scanning electron microscopy-based mineral mapping techniques. We demonstrate that the use of hyperspectral scanning allows for faster, non-invasive and more efficient drill-core mapping, providing a useful tool for complementing core-logging performed by on-site geologists. View Full-Text
Keywords: hyperspectral imaging; drill-core; mineral mapping; short-wave infrared; porphyry-type veins hyperspectral imaging; drill-core; mineral mapping; short-wave infrared; porphyry-type veins
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MDPI and ACS Style

Tusa, L.; Andreani, L.; Khodadadzadeh, M.; Contreras, C.; Ivascanu, P.; Gloaguen, R.; Gutzmer, J. Mineral Mapping and Vein Detection in Hyperspectral Drill-Core Scans: Application to Porphyry-Type Mineralization. Minerals 2019, 9, 122. https://doi.org/10.3390/min9020122

AMA Style

Tusa L, Andreani L, Khodadadzadeh M, Contreras C, Ivascanu P, Gloaguen R, Gutzmer J. Mineral Mapping and Vein Detection in Hyperspectral Drill-Core Scans: Application to Porphyry-Type Mineralization. Minerals. 2019; 9(2):122. https://doi.org/10.3390/min9020122

Chicago/Turabian Style

Tusa, Laura, Louis Andreani, Mahdi Khodadadzadeh, Cecilia Contreras, Paul Ivascanu, Richard Gloaguen, and Jens Gutzmer. 2019. "Mineral Mapping and Vein Detection in Hyperspectral Drill-Core Scans: Application to Porphyry-Type Mineralization" Minerals 9, no. 2: 122. https://doi.org/10.3390/min9020122

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