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  4. Surface Geophysical data collected along Blacktail Creek in June 2017 near Williston, North Dakota, USA
  5. Electromagnetic Imaging (EMI) data collected along Blacktail Creek in June 2017 near Williston, North Dakota, USA

Electromagnetic Imaging (EMI) data collected along Blacktail Creek in June 2017 near Williston, North Dakota, USA

Dates

Publication Date
Start Date
2017-06-27
End Date
2017-06-28

Citation

M.A. Briggs, E.A. White, N.C. Terry, and J.W. Lane, 2020, Surface Geophysical data collected along Blacktail Creek in June 2017 near Williston, North Dakota, USA: U.S. Geological Survey data release, https://doi.org/10.5066/P9N1GQID.

Summary

The electrical conductivity of the earth is used to help infer lithological and pore fluid properties. Various geophysical methods can provide estimates of the distribution of below ground electrical conductivity, with each method having certain limitations. This data release presents raw and processed results from hand-caried frequency domain electromagnetic induction imaging (EMI) data collected from June 27-28 along Blacktail Creek near Williston, North Dakota. Data were primarily collected by walking in the creek or along the riparian zones with the GEM-2 instrument (Geophex, Ltd.) at approximately 0.5 m off the ground in horizontal coplanar (ski flat) mode.

Contacts

Point of Contact :
Martin A Briggs, Hydrogeophysics Branch
Originator :
Martin A Briggs, Eric A White, Neil C Terry, John W Lane
Metadata Contact :
Martin A Briggs
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Water Resources
SDC Data Owner :
Earth System Processes Division

Attached Files

Click on title to download individual files attached to this item.

Metadata_EMI.xml
Original FGDC Metadata
View 		9.88 KB application/fgdc+xml
Figure_xb.jpg thumbnail 1.43 MB image/jpeg
Processed_Data.zip 7.29 MB application/zip
Raw_Data.zip 4.24 MB application/zip
README_EMI.txt 733 Bytes text/plain

Purpose

Electromagnetic induction data were used to map variations in subsurface electrical conductivity to infer shallow flowpaths and storage zones influenced by residual spilled UOG waste waters that are highly saline. However, natural brine in shallow groundwater in the area complicates the process-based interpretation of these data without additional direct chemical measurements. The raw instrument quadrature data can be used as a surrogate for bulk streambed conductivity, while this raw data can be 'inverted' to recover true bulk conductivity values.
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  • USGS Hydrogeophysics Branch

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