1887

Abstract

Summary

Exploring for underground resources using land-based electromagnetic methods can be very challenging due to the presence of strong human-generated and “geological” noise. In such context, some passive EM techniques like the Magneto-Telluric method may not be applicable at all and a dedicated toolbox of EM techniques capable of dealing with these issues is required. We focus here on the challenges encountered while exploring for geothermal resources in volcanic islands, namely a highly heterogeneous near-surface creating strong static-shifts, the presence of a sea/land transition zone and a high degree of urbanization over the area of interest. We will show that a combined airborne and land-based controlled-source EM approach provide a robust approach and illustrate these aspects with an EM dataset acquired over the Martinique Island, in the French Lesser Antilles. We believe this work sets the foundations for more robust geophysical exploration workflows in such challenging EM environments.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201701357
2017-06-12
2024-03-29
Loading full text...

Full text loading...

References

  1. MacLennanK. and LiY.
    (2013). “Denoising multicomponent CSEM data with equivalent source processing techniques.” GEOPHYSICS, 78(3), E125–E135. doi: 10.1190/geo2012‑0226.1
    https://doi.org/10.1190/geo2012-0226.1 [Google Scholar]
  2. Sternberg, B. K., Washburne, J. C. and Pellerin, L.
    : Correction for the static shift in magnetotellurics using transient electromagnetic soundings. Geophysics, Vol. 53, (1988), 1459–1468
    [Google Scholar]
  3. StreichR.
    , 2016, Controlled-Source Electromagnetic Approaches for Hydrocarbon Exploration and Monitoring on Land, Surv Geophys (2016) 37:47–80, DOI 10.1007/s10712‑015‑9336‑0
    https://doi.org/10.1007/s10712-015-9336-0 [Google Scholar]
  4. Ussher, G., Harvey, C., Johnstone, R.
    : Understanding the resistivities observed in geothermal systems, Proceedings, World Geothermal Congress 2000, Kyushu-Tohoku, Japan, May 28–june 10, 2000, p. 1915–1920.
    [Google Scholar]
  5. Viezzoli, A., Christiansen, A. V., Auken, E., and Sørensen, K. I.
    , 2008. Quasi-3D modeling of airborne TEM data by Spatially Constrained Inversion: Geophysics, 73, F105–F113
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701357
Loading
/content/papers/10.3997/2214-4609.201701357
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error