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Collapse structures indicate karst flow corridors in carbonate units in the Salitre Formation, Brazil
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Fourth Naturally Fractured Reservoir Workshop, Feb 2020, Volume 2020, p.1 - 4
Abstract
Summary
Karstification generated by the circulation of fluids along fracture zones leads to the formation of upward erosive features, which result in dolines. In this work, we investigate collapse structures and their relationship with flow corridors in Neoproterozoic carbonate units in the Irecê Basin, Brazil. This area has a high concentration of dolines that connect surface drains through a cryptorheic system. We used high-resolution unnamed aerial vehicle (UAV) imagery, field mapping of dolines, structural lineaments, drainage, and field measurements of bedding strikes and dips. We conclude that collapse structures along anticline fold hinges form flow corridors. These findings have implications for fractured reservoirs.
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