Geophysical characterization of geothermal resources on the Umatilla Indian Reservation in northeast Oregon
Dates
Publication Date
2022-04-11
Date Collected
2017
Date Collected
2020
Citation
Earney, T.E., Glen, J.M., Peacock, J.R., DeAngelo, J., Dean, B.J., Zielinski, L.A., Bouligand, C., Siler, D.L., and Schermerhorn, W.D., 2022, Geophysical characterization of geothermal resources on the Umatilla Indian Reservation in northeast Oregon: U.S. Geological Survey data release, https://doi.org/10.5066/P9908RVH.
Summary
During the summers of 2017 and 2020, our team collected gravity, ground magnetic (ATV and hiked traverses), paleomagnetic and rock property (density and susceptibility) data on the Umatilla Indian Reservation (UIR) in northeast Oregon to aid in characterizing subsurface stratigraphy using 2D and 3D modeling methods. This data was integrated with conductance surfaces from a 3D magnetotelluic model and regional stress data to generate geothermal resource favorability maps to inform future exploration and drilling efforts by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR).
Summary
During the summers of 2017 and 2020, our team collected gravity, ground magnetic (ATV and hiked traverses), paleomagnetic and rock property (density and susceptibility) data on the Umatilla Indian Reservation (UIR) in northeast Oregon to aid in characterizing subsurface stratigraphy using 2D and 3D modeling methods. This data was integrated with conductance surfaces from a 3D magnetotelluic model and regional stress data to generate geothermal resource favorability maps to inform future exploration and drilling efforts by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR).
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Umatilla_DataRelease_Metadata_final.xml “Metadata” Original FGDC Metadata
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Umatilla_final_220308.zip “Data files”
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Purpose
The geothermal assessment at the Umatilla Indian Reservation was undertaken to aid the CTUIR in developing a potential renewable baseload energy resource for direct-use or electricity generation that will support energy independence and sustainability of the Tribal community and its environment. The primary goal of the work was to better characterize the structural setting of the UIR geothermal resource, and to help identify promising sites for temperature gradient hole (TGH) drilling where favorable permeable structures provide access to geothermal fluids at economically viable depths (1.5 to 2.5 km).
