Contribution of Landsat 8 OLI imagery to mapping of lithological series and lineaments: implications for Pb-Zn mineralization exploration in the Boudahar Massif, Eastern High Atlas, Morocco

Jaouad Choukrad; Abdelkhiar Ait Ali; Hicham Si Mhamdi; Youssef Ouahzizi; Nacir El Moutaouakkil; Naoufal Saoud; Mohammed Charroud

doi:10.3989/egeol.45041.1056

Autores/as

Jaouad Choukrad Sidi Mohamed Ben Abdellah University https://orcid.org/0000-0001-7303-2781
Abdelkhiar Ait Ali Intelligent Systems, Georessources and Renewable Energy Laboratory, Faculty of Sciences and Technics, Sidi Mohamed Ben Abdellah University https://orcid.org/0000-0002-7224-0674
Hicham Si Mhamdi Faculty of Sciences and Technics of Errachidia, Moulay Ismail University https://orcid.org/0000-0002-9008-2059
Youssef Ouahzizi Intelligent Systems, Georessources and Renewable Energy Laboratory, Faculty of Sciences and Technics, Sidi Mohamed Ben Abdellah University https://orcid.org/0000-0002-0583-2522
Nacir El Moutaouakkil Geosciences, Water and Environment Laboratory, Faculty of Sciences Rabat, Mohammed V, University of Rabat, https://orcid.org/0009-0000-6908-6234
Naoufal Saoud Intelligent Systems, Georessources and Renewable Energy Laboratory, Faculty of Sciences and Technics, Sidi Mohamed Ben Abdellah University https://orcid.org/0000-0002-9574-0495
Mohammed Charroud Intelligent Systems, Georessources and Renewable Energy Laboratory, Faculty of Sciences and Technics, Sidi Mohamed Ben Abdellah University https://orcid.org/0000-0002-1097-5894

DOI:

https://doi.org/10.3989/egeol.45041.1056

Palabras clave:

Macizo de Boudahar, Alto Atlas Oriental, imágenes Landsat 8 OLI, teledetección, mapeo, lineamientos, litología, mineralización de plomo-zinc

Resumen

El macizo de Boudahar se encuentra en la parte sur del cinturón oriental del Alto Atlas marroquí y corresponde a una masa arrecifal de unos diez kilómetros de longitud. Jbel Boudahar es un distrito de mineralización de plomo-zinc-barita, conocido por una fuerte explotación artesanal de sus minerales. Este distrito se caracteriza por su topografía con contrastes de altitud y ambiente árido, lo que hace más valiosa la información obtenida.

El procesamiento de datos Landsat 8 OLI nos permitió extraer un mapa litológico y estructural, con el objetivo de realizar correlaciones para entender la distribución de la mineralización de plomo-zinc. Para ello se realizaron varias pruebas, entre ellas la composición de color, análisis de componentes principales y transformaciones de ratios de bandas

La ubicación de los depósitos principales en Jbel Boudhar coincide bien con el lineamiento derivado de la banda 1 del análisis de componentes principales y con las formaciones dolomíticas pliensbachienses mapeadas por MNF y BR de Landsat OLI8. Así, se ha establecido un modelo de prospección geológica de detección remota para los depósitos de plomo y zinc de Jbel Boudhar, que proporciona una base para la prospección futura de nuevos depósitos en un contexto similar.

The processing of Landsat 8 OLI data allowed us to extract lithological and structural data in the Boudahar region, and to make correlations to understand the repartition of lead-zinc mineralization. Several tests were performed, including Color Composite, main component analysis, and band rationing transformation.

These results assign high precision to the mapping process using remote sensing, and provide a clear relationship regarding lineaments and lithology, which control the repartition of Boudahar massif mineralization’s.

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