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Frequency domain electromagnetic induction (FDEM) data collected around mine-impacted streams near Silverton, Colorado in September 2019 and 2021 (ver. 2.0, March 2022)

Dates

Start Date
2019-09-05
Publication Date
Revision
2022-05-03

Citation

Terry, N., Briggs, M., Rutila, E., Werkema, D., and Dyment, S., Rey, D., and Trottier, B., 2020, Near-surface geophysical data collected along streams near Silverton, Colorado, USA (ver. 2.0, May 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P97HDPAY.

Summary

This child item contains frequency domain electromagnetic induction (FDEM) data collected along and around Cement Creek California Gulch, and the Animas River near Silverton, Colorado in support of other data collected at the site. The FDEM tool generates an EM field and measures eddy currents generated by conductive and/or magnetic materials in the subsurface in response to the applied field. A Geophex GEM-2 instrument with GPS was used with frequencies ranging from 450 Hz to 47970 Hz. Additional details are contained in the ‘readme.txt’ files within each zip data directory.

Contacts

Attached Files

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FDEM.jpg thumbnail 650.91 KB image/jpeg
readme_FDEM.txt 1.17 KB text/plain
Processed.zip 43.38 MB application/zip
Raw.zip 73.52 MB application/zip

Purpose

While fiber optic distributed temperature sensing (FO-DTS) and surface water synoptic sampling data were gathered to locate groundwater discharge zones and assess their chemistry, FDEM data were collected in an attempt to observe spatial patterning related to the discharge zones away from streams and into the ground. FDEM data were also collected in a small mountain peatland between Mogul Mine and Cement creek to observe spatial patterns of elevated electrical conductivity that may be related to the mine drainage. These data were collected in tandem with the self-potential (SP) and ground penetrating radar (GPR) components of this data release.

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