Mapping of near-surface formations by refraction seismic tomography: a case study from Al-Amerat, Sultanate of Oman

In this study, a seismic refraction survey is conducted to image the structure of the bedrock and overlying rocks in Wadi Al-Mayh from Al-Amerat, Northern Oman. The bedrock is a consolidated and impermeable metamorphic rock. The porous and unconsolidated rocks lying above the bedrock have played a k...

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Bibliographic Details
Published in:Arabian journal of geosciences 2020-06, Vol.13 (12), Article 462
Main Authors: Farfour, Mohammed, Al-Hosni, Talal
Format: Article
Language:English
Subjects:
Aquifers
Bedrock
Earth and Environmental Science
Earth science
Earth Sciences
Mapping
Metamorphic rocks
Original Paper
Profiles
Rain
Rainfall
Refraction
Seismic analysis
Seismic data
Seismic profiles
Seismic refraction
Seismic surveys
Seismic tomography
Surveying
Three dimensional models
Tomography
Velocity
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Summary:In this study, a seismic refraction survey is conducted to image the structure of the bedrock and overlying rocks in Wadi Al-Mayh from Al-Amerat, Northern Oman. The bedrock is a consolidated and impermeable metamorphic rock. The porous and unconsolidated rocks lying above the bedrock have played a key role in transporting and storing water from rainfall. Seismic data were collected from 8 seismic profiles acquired along the wadi. Tomographic inversion of the data has produced velocity models that have contributed to understand how the water accumulates, migrates, and charges the aquifer in the subsurface of the wadi. Data from the exposed rocks on surface and from a water-producing well in the area were used to calibrate the velocity models. The latter models were used to build 3-D depth map that not only helped to understand the distribution of porous and permeable zones but also has provided an interpretation for a water-producing well in the area that has run dry after decades of production.
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-020-05459-8