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Geophysical Contributions to Gold Exploration in Western Mali According to Airborne Electromagnetic Data Interpretations

1
Faculté des Sciences de Bizerte (FSB), Université de Carthage, Bizerte 7021, Tunisia
2
Unité de Recherche de la Géophysique Appliquée aux Minerais et Matériaux (URGAMM), Faculté des Sciences de Tunis El Manar, Tunis 2092, Tunisia
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Laboratoire de Cartographie, Département de Géologie, Faculté des Sciences et Techniques (FST), Université des Sciences, des Techniques et des Technologiques de Bamako (USTTB), Bamako BP: E3206, Mali
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EurekaGeo SARL, Geoscientist Consulting, Hamdallaye ACI 200, Bamako BP: E3493, Mali
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Department of Geology and Geophysics, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
*
Author to whom correspondence should be addressed.
Minerals 2021, 11(2), 126; https://doi.org/10.3390/min11020126
Received: 29 December 2020 / Revised: 18 January 2021 / Accepted: 21 January 2021 / Published: 27 January 2021
(This article belongs to the Section Mineral Deposits)
The Birimian of West African Craton (WAC) is known for its gold potential. Among Birimian structures, N-S and NE-SW trends have been defined as controlling gold mineralizations in Kedougou-Kenieba Inlier (KKI), whereas some of these structures are not gold-bearing. To determine structures related to gold mineralization, airborne electromagnetic data collected during the “Système Minier” of Mali have been processed and interpreted. Identified lineaments have been followed in the ground to establish their link with gold showings in the Kenieba area. Geophysical interpretations show trends similarity for different orders of conductivity. They allowed for characterizing resistance and conductive structures with prevalent N-S and NE-SW directionalities. Conductive structures are qualified as good conductors and are strongly related to known Artisanal Mining Sites (AMS). They coincide with tourmaline sandstones and quartz-albite veins, which are both often artisanally recognized as indicators of gold mineralization in Western Mali. Field observations show that resistance structures correspond to felsic rocks. These structures can bear gold only when silicified and they have spatial relations with Artisanal Mining Sites (AMS) within the Kenieba area. This study shows the efficiency of electromagnetic methods to characterize Birimian structures in relation to the gold mineralization in Kedougou-Kenieba Inlier (KKI). View Full-Text
Keywords: applied geophysics; electromagnetic methods; gold exploration; Birimian structures; West African Craton (WAC); Western Mali; Artisanal Mining Sites (AMS) applied geophysics; electromagnetic methods; gold exploration; Birimian structures; West African Craton (WAC); Western Mali; Artisanal Mining Sites (AMS)
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MDPI and ACS Style

Koné, A.Y.; Nasr, I.H.; Traoré, B.; Amiri, A.; Inoubli, M.H.; Sangaré, S.; Qaysi, S. Geophysical Contributions to Gold Exploration in Western Mali According to Airborne Electromagnetic Data Interpretations. Minerals 2021, 11, 126. https://doi.org/10.3390/min11020126

AMA Style

Koné AY, Nasr IH, Traoré B, Amiri A, Inoubli MH, Sangaré S, Qaysi S. Geophysical Contributions to Gold Exploration in Western Mali According to Airborne Electromagnetic Data Interpretations. Minerals. 2021; 11(2):126. https://doi.org/10.3390/min11020126

Chicago/Turabian Style

Koné, Adama Y., Imen H. Nasr, Baco Traoré, Adnen Amiri, Mohamed H. Inoubli, Souleymane Sangaré, and Saleh Qaysi. 2021. "Geophysical Contributions to Gold Exploration in Western Mali According to Airborne Electromagnetic Data Interpretations" Minerals 11, no. 2: 126. https://doi.org/10.3390/min11020126

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