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Abstract

Summary

In this study, we present a seismic investigation of the western margin of the Kaapvaal Craton, integrating reflection profiles, a first-arrival tomography, and receiver function analysis to improve imaging of a subsurface region of mineral exploration interest in the Northern Cape of South Africa. Processing of the GS-02 seismic line using prestack migration techniques reveals a well-defined package of west-dipping reflectors, interpreted as supracrustal units of the Ghaap and Postmasburg Groups—known to host hematite-rich banded iron formations in outcrops further east. These reflectors can be traced beneath the Kalahari and Olifantshoek cover, suggesting that iron-bearing stratigraphy extends into previously unexplored regions.

Also shown in our results are various structural controls such as faults and nappes. The Blackridge thrust front is clearly imaged as a major tectonic boundary, with complex folding and structural repetition in the overthrust Kheis Province. Tomographic results constrain the thickness of the sedimentary cover, while receiver function models confirm crustal structure across the profile.

Together, these results support the use of modern seismic methods to guide mineral exploration in poorly exposed terranes. This work demonstrates the potential of integrating seismic datasets to reveal new exploration targets and improve understanding of their tectonic context.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202520162
2025-09-07
2026-02-15

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References

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Pre-Stack Migration Imaging of Mineral-Hosting Supracrustals in the Kaapvaal Craton, with Complementary Teleseismic and Travel-Time Analysis
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202520162
/content/papers/10.3997/2214-4609.202520162
/content/papers/10.3997/2214-4609.202520162
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