Published December 14, 2022
| Version v1
Dataset
Open
Magnetotelluric data from Santos basin (SE Brazil) and inversion resistivity models exploring basin wedge and deep crustal structure beneath.
- 1. Department of Geophysics, National Observatory, Rio de Janeiro, Brazil
- 2. Petronas Carigali, Kuala Lumpur, Malaysia
Description
Magnetotelluric data
Processed data from 90 magnetotelluric broadband stations acquired in are available in Electrical Data Interchange (EDI) and ModEM format.
The MMT data were recorded in 2007 by WesternGeco Electromagnetics as part of the National Observatory Rio de Janeiro project funded by Petrobras. The campaign comprised a total of 92 sites from shallow water (about 50 m depth) to deep water (about 1600 m depth). The stations are placed along three NW-SE parallel profiles in the northwest part of Santos basin. The central profile is approximately 160 km long and consists of 56 stations, while the west profile and east profile extend about 55 km each and contain 18 and 16 stations, respectively.
Models
Inversion models and predicted data are present for two different starting resistivity model testes 10 and 1 Ohm.m. The inversion models were estimated using ModEM - modular system for inversion of electromagnetic geophysical data.
Files
magnetotelluric_data_edi_format.zip
Files
(36.2 MB)
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Additional details
References
- Kelbert, A., Meqbel, N., Egbert, G. D., & Tandon, K. (2014). ModEM: A modular system for inversion of electromagnetic geophysical data. Computers & Geosciences, 66, 40-53.
- Gallardo, L. A., Fontes, S. L., Meju, M. A., Buonora, M. P. and Lugao, P. P., 2012. "Robust geophysical integration through structure-coupled joint inversion and multispectral fusion of seismic reflection, magnetotelluric, magnetic, and gravity images: Example from Santos Basin, offshore Brazil." Geophysics 77.5 (2012): B237-B251.
- Fontes, S. L., P. P. de Lugao, M. A. Meju, V. R. Pinto, J. Flexor, E. U. Ulugergerli, E. F. La Terra, L. A. Gallardo, and L. Rijo, 2009, Marine magnetotelluric mapping of basement and salt bodies in the Santos Basin of Brazil: First Break, 27, 84
- de Lugao, P. P., S. L. Fontes, E. F. La Terra, A. Zerilli, T. Labruzzo, and M. P. Buonora, 2008, First application of marine magnetotellurics improves depth imaging in the Santos Basin, Brazil: 70th Annual International Conference and Exhibition, EAGE, Extended Abstracts.