Application of band ratios to map hydrothermal alteration zones related to Au-Sb mineralization in Freixeda, Northern Portugal

D. Santos; J. Cardoso-Fernandes; A. Lima; A. C. Teodoro

doi:10.1117/12.3031682

13 November 2024 Application of band ratios to map hydrothermal alteration zones related to Au-Sb mineralization in Freixeda, Northern Portugal

D. Santos, J. Cardoso-Fernandes, A. Lima, A. C. Teodoro

Author Affiliations +

Proceedings Volume 13197, Earth Resources and Environmental Remote Sensing/GIS Applications XV; 131970L (2024) https://doi.org/10.1117/12.3031682
Event: Remote Sensing, 2024, Edinburgh, United Kingdom

Abstract

In a world where there is a growing need for new "green" technologies, there is also an increase in the demand for necessary critical raw materials (CRM) for their production and maintenance. Several CRM deposits, such as antimony (Sb) and gold (Au), occur in Iberian Peninsula. These occurrences are poorly studied in the study area, and the potential for discoveries is high. Remote sensing appears to be more environmentally friendly (non-invasive) in mapping hydrothermally altered zones associated with Au-Sb mineralizations. However, classical remote sensing methods, such as Band Ratios, are limited by the low spectral resolution of multispectral satellites. Therefore, hyperspectral satellites are of great importance for mineral mapping. This work aims to apply band ratio-based methods in a PRISMA image to map hydrothermal alteration zones related to Au-Sb mineralization. The findings of this study demonstrate the feasibility of utilizing PRISMA satellite imagery and Band Ratios techniques to map hydrothermal alteration zones associated with Au-Sb mineralization in Freixeda. The results indicate that the same Relative Band Depth (RBD) calculated to map Montmorillonite can also be effectively used to map kaolinite and vice versa.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

D. Santos, J. Cardoso-Fernandes, A. Lima, and A. C. Teodoro "Application of band ratios to map hydrothermal alteration zones related to Au-Sb mineralization in Freixeda, Northern Portugal", Proc. SPIE 13197, Earth Resources and Environmental Remote Sensing/GIS Applications XV, 131970L (13 November 2024); https://doi.org/10.1117/12.3031682

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available