1887

Abstract

Summary

Geophysical inversion provides a robust method for determining geometric and physical properties of greenstone belts, sequences known for hosting gold, thereby aiding in resource exploration. This study presents 3D inverted models for the Yaouré Greenstone Belt region to analyse density and magnetic susceptibility distributions in the subsurface. The area has a lower sequence comprising metabasalts and mafic intrusions and an upper sequence comprised of volcaniclastic rocks. We performed 3D inversions using gravity, full tensor gravity gradiometry and magnetic data across the belt acquired from an airborne geophysical survey using the open-source Tomofast-x software. Results show positive density contrasts in the basalt units and mafic intrusions, while higher magnetic susceptibilities concentrate in volcano-sedimentary units. Notable features include a high-density contrast east of the Yaouré gold mine, potentially indicating an intrusion, and a pronounced magnetic contrast below a major NE-SW fault, where the dip of the magnetic body aligns with the mapped eastward-dipping geology. Future work will incorporate petrophysical constraints, geological information, and seismic data to refine our models within the Tomofast-x framework.

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2025-06-02
2026-02-14

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Preliminary Magnetic and Gravity Inversions for the Yaouré Greenstone Belt Region, Ivory Coast, West Africa
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202510812
/content/papers/10.3997/2214-4609.202510812
/content/papers/10.3997/2214-4609.202510812
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