Lithological discrimination and mineralogical mapping using ASTER remote sensing data in the east-central Jebilet region, Morocco

• Autorzy: El Khounaijri Hayat , Algouti Ahmed , Algouti Abdellah , Essemani Mohamed , Hadach Fatiha , Baid Soukaina , Ezzahzi Salma , Kabili Salma , Agli Saloua , Jdaba Naji

Identyfikatory

DOI

10.14746/logos.2025.31.2.13

• Języki publikacji: EN

Abstrakty

EN

This study evaluates the effectiveness of ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) satellite data for lithological discrimination and mineralogical mapping in the east-central Jebilet region, Morocco. ASTER data offer considerable potential for detecting spectral signatures of mineral zones and determining their composition. The main objective is to apply image processing techniques, such as band ratios (BR), principal component analysis (PCA) and minimum noise fraction (MNF), in order to identify and map characteristic minerals in the region. The application of various band ratios effectively mapped the distribution of key minerals and alteration zones in the study area. The band ratio (band7/band5) was used to identify kaolinite, while the ratio (band4+band6)/band5 highlighted the presence of a mineral group constisting of alunite, kaolinite and pyrophyllite. The ratio (band7+band9)/ band8 revealed a set of a carbonate mineral, chlorite and epidote, whereas endoskarns composed of epidote, chlorite and amphibole were mapped using the ratio (band6+band9)/(band7+band8). The ratio (band5+band7)/band6 characterised phyllic alteration by detecting phyllosilicate minerals such as sericite, muscovite or illite. Phengite was mapped using the band5/band6 ratio. The distribution of these minerals was closely linked to the lithological variability of previously mapped geological units, highlighting the relevance and effectiveness of band ratios for geological mapping using remote sensing. The PCA and MNF components with the highest eigenvalues significantly improved lithological discrimination by reducing noise and refining the delineation of mineral zones. The results obtained have enabled the creation of a detailed map of mineral distribution, highlighting the alteration zones and lithological formations in the eastern Jebilet region of Morocco.time-consuming, yet inexpensive method that can be applied to other areas, especially those that are difficult to reach.

Słowa kluczowe

EN

GIS; ASTER; central Jebilet; lithological discrimination; mineralogical mapping

PL

GIS; ASTER; Jebilet; mapowanie mineralogiczne

• Wydawca: Uniwersytet im. Adama Mickiewicza. Instytut Geologii
• Czasopismo: Geologos
• Rocznik: 2025
• Tom: Vol. 31, No. 2
• Strony: 167--177
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

El Khounaijri Hayat

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Algouti Ahmed

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Algouti Abdellah

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Essemani Mohamed

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Hadach Fatiha

• Department of Geology, Faculty of Sciences, Ibno Zohr University, Agadir, Morocco

autor

Baid Soukaina

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Ezzahzi Salma

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Kabili Salma

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Agli Saloua

• Department of Geology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco

autor

Jdaba Naji

• Department of Geology, Faculty of Sciences, Ibno Zohr University, Agadir, Morocco

Bibliografia

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