Montserrat geothermal system: A 3D conceptual model

We constructed a three‐dimensional conceptual model of a geothermal system on the Caribbean island of Montserrat. The model was generated using magnetotelluric resistivity data, earthquake hypocenter data, and a three‐dimensional P wave velocity model, all plotted using a shared geographical referen...

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Bibliographic Details
Published in:Geophysical research letters 2013-05, Vol.40 (10), p.2038-2043
Main Authors: Ryan, G. A., Peacock, J. R., Shalev, E., Rugis, J.
Format: Article
Language:English
Subjects:
Anomalies
Contractors
Control systems
Depth
Earthquakes
Elastic waves
Electrical resistivity
Fault lines
Faults
Geophysics
Geothermal
Heat
Heat flux
Heat transfer
High temperature
Islands
Magnetotellurics
Mathematical models
Montserrat
P waves
Permeability
Proxy client servers
Seismic activity
Seismic phenomena
seismic tomography
Seismic velocities
Seismic wave velocities
Spatial variations
Temperature
Temperature effects
Three dimensional models
Velocity
Wave velocity
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Summary:We constructed a three‐dimensional conceptual model of a geothermal system on the Caribbean island of Montserrat. The model was generated using magnetotelluric resistivity data, earthquake hypocenter data, and a three‐dimensional P wave velocity model, all plotted using a shared geographical reference. The results of the study suggest a high‐temperature fracture‐controlled geothermal system at the intersection of two faults in the SW of the island. We also present a “prospectivity index” map that represents a proxy of the spatial variation in harvestable heat flux at 1500 m depth. The index is the product of relative permeability around modeled faults and a proxy for the subsurface temperature calculated using P wave velocity anomalies. Key Points Geothermal system conceptual model derived from three geophysical data setsJoint interpretation of magnetotelluric, tomographic and seismicity dataThree‐dimensional conceptual model of Montserrat geothermal system
ISSN:0094-8276
1944-8007
DOI:10.1002/grl.50489