Prospección minera de la mineralización de óxidos de Fe-Mn-Pb en Jbel Skindis (Alto Atlas Oriental, Marruecos) basada en teledetección y SIG

Adnane  Tobi; Mourad  Essalhi; Daoud  El Azmi; Mostapha  Bouzekraoui; Bilal  El Ouaragli

doi:10.3989/egeol.44641.614

Authors

Adnane Tobi Moulay Ismail University, Faculty of Sciences and Techniques, Applied Geology Laboratory - Africorp Mining Company, Africorp Consortium group https://orcid.org/0000-0001-7640-6785
Mourad Essalhi Moulay Ismail University, Faculty of Sciences and Techniques, Applied Geology Laboratory https://orcid.org/0000-0001-5696-9636
Daoud El Azmi Africorp Mining Company, Africorp Consortium group https://orcid.org/0000-0001-5785-6596
Mostapha Bouzekraoui Moulay Ismail University, Faculty of Sciences and Techniques, Applied Geology Laboratory - Mohammed V University in Rabat, Faculty of Sciences, Geosciences, Water, Environment Laboratory https://orcid.org/0000-0002-5060-3585
Bilal El Ouaragli Africorp Mining Company, Africorp Consortium group https://orcid.org/0000-0002-0590-5488

DOI:

https://doi.org/10.3989/egeol.44641.614

Keywords:

Remote sensing, Fe-Mn-Pb deposits, Multicriteria analysis, Mineral exploration, Eastern High-Atlas

Abstract

In recent years, remote sensing has had a prominent place in mineral exploration programs given its potential to identify alteration minerals, such as clay and hydroxyl minerals. Those minerals represent significant guides to mineral deposits considering their potential to host valuable concentrations of base metal elements. This work focuses on Fe-Mn-Pb mineral deposits within the Jbel Skindis area as a case study to illustrate the application of remote sensing images and GIS systems to highlight prospective zones and to extract information on ore-controlling factors using image enhancement and integration methods. Field observations and XRD data showed that the main remotely sensed alteration anomalies are characterized by oxides and hydroxides. Based on those indicative minerals, a mapping using Aster L1T and Landsat 8 OLI data was done: the 5/4 ratio highlighted gossans zones and the RGB combination (4/6, 2/1, 3/2) accentuates the hydrothermally altered areas. The lineament map extracted from Sentinel 2A and Landsat imagery allowed the reconstitution of the megafracture network that affected the region. The multi-criteria analysis of these satellite-derived data along with available geological data outcomes to delineate prospective zones in the study area, were found to be in highly fractured areas developing gossans and Fe rich alteration. Verified via field survey, this approach was successfully applied to the Jbel Skindis area to rapidly delineate oxidized ore outcrops. This provides a remote sensing model for future prospecting efforts for similar mineral deposits both in the Eastern High-Atlas province and in other similar areas.

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