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  4. Alaska permafrost characterization: Borehole Nuclear Magnetic Resonance Data & Models from 2019-2020

Alaska permafrost characterization: Borehole Nuclear Magnetic Resonance Data & Models from 2019-2020

Dates

Publication Date
Start Date
2019-09-02
End Date
2019-09-05

Citation

James, S.R., Minsley, B.J., Pastick, N.J., and Sullivan, T.D., 2020, Alaska permafrost characterization: Geophysical and related field data collected from 2019-2020: U.S. Geological Survey data release, https://doi.org/10.5066/P9I6VUQV

Summary

Borehole nuclear magnetic resonance (NMR) data were collected by the U.S. Geological Survey (USGS) at Big Trail Lake, a thermokarst lake outside of Fairbanks, Alaska, to quantify unfrozen water content and soil properties at select sites in and around the lake edge. In September 2019, NMR data were collected within two 2.3 m deep boreholes adjacent to the East and North perpendicular electrical resistivity survey lines. Manual permafrost-probe measurements of thaw depths were also collected. These two boreholes were logged a second time in late March 2020. Additional one-time NMR measurements of liquid water content were collected in September 2019 within the lakebed sediments (0-25 cm depth) in approximately 2.5 m lateral increments [...]

Contacts

Point of Contact :
Stephanie R James
Originator :
Stephanie R James, Burke J Minsley, Neal J Pastick, Taylor D Sullivan
Metadata Contact :
Stephanie R James, GS GGGSC DM Team
Publisher :
U.S. Geological Survey
SDC Data Owner :
Geology, Geophysics, and Geochemistry Science Center
USGS Mission Area :
Ecosystems
Distributor :
U.S. Geological Survey - ScienceBase

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Alaska permafrost characterization_ Borehole Nuclear Magnetic Resonance Data & Models from 2019-2020.xml
Original FGDC Metadata
View 		24.04 KB application/fgdc+xml
Borehole_Nuclear_Magnetic_Resonance_Inverted_Models_BigTrailLake_Alaska_2019-2020.csv 9.04 KB text/csv
bNMR_T2 data_dictionary.csv 496 Bytes text/csv
bNMR_data_dictionary.csv 490 Bytes text/csv
Borehole_Nuclear_Magnetic_Resonance_T2_BigTrailLake_Alaska_2019-2020.csv 590.22 KB text/csv
Borehole_Nuclear_Magnetic_Resonance_Data_BigTrailLake_Alaska_2019-2020.csv 4.51 MB text/csv
bNMR_InvertedModel_data_dictionary.csv 749 Bytes text/csv
3.22 GB application/zip
Shapefile: AK2019-2020_NMR_SiteLocations.zip
AK2019-2020_NMR_SiteLocations.shp 436 Bytes
AK2019-2020_NMR_SiteLocations.cpg 5 Bytes
AK2019-2020_NMR_SiteLocations.dbf 14.26 KB
AK2019-2020_NMR_SiteLocations.prj 143 Bytes
AK2019-2020_NMR_SiteLocations.qpj 257 Bytes
AK2019-2020_NMR_SiteLocations.shx 196 Bytes

Purpose

These data were collected to characterize subsurface properties related to permafrost and soil moisture at sites where permafrost is either actively thawing or has experienced pronounced thaw in recent years.

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