Shallow depth extent of the Lesutoskraal granophyre dike in the Vredefort impact structure: Geophysical surveys and trenching data

Recent observations and geophysical studies at the Vredefort impact structure have indicated that the impact melt dikes in the central uplift of the structure have small depth extents. In this study, we performed magnetic and electrical resistivity tomography (ERT) surveys of the Lesutoskraal granop...

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Bibliographic Details
Published in:Meteoritics & planetary science 2023-09, Vol.58 (9), p.1345-1364
Main Authors: Fourie, F. D., Huber, M. S., Kovaleva, E., Clark, M. D.
Format: Article
Language:English
Subjects:
Dikes
Electric contacts
Electrical resistivity
Geophysical studies
Geophysical surveys
Geophysics
Impact melts
Magnetic anomalies
Magnetic surveys
Outcrops
Polls & surveys
Trenching
Visual observation
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Summary:Recent observations and geophysical studies at the Vredefort impact structure have indicated that the impact melt dikes in the central uplift of the structure have small depth extents. In this study, we performed magnetic and electrical resistivity tomography (ERT) surveys of the Lesutoskraal granophyre dike (LGD) and trenched to confirm its depth extent. The ERT survey showed that outcrops of the LGD are associated with shallow resistive zones with
ISSN:1086-9379
1945-5100
DOI:10.1111/maps.14065