Aeromagnetic Data and horizontal gradient maxima of Garlock, California, and Surrounding Areas in California
Dates
Publication Date
2022-12-02
Start Date
2021-11-20
End Date
2022-01-17
Citation
Langenheim, V.E., 2022, Aeromagnetic Data and horizontal gradient maxima of Garlock, California, and Surrounding Areas in California: U.S. Geological Survey data release, https://doi.org/10.5066/P9JK947Q.
Summary
This data release provides access to an aeromagnetic survey and magnetization boundaries over Garlock, California and surrounding areas in southern California. The survey extends from the city of Bakersfield across the southern Sierra Nevada and Tehachapi Mountains and west over Indian Wells Valley and the towns of Mojave and Rosamond to just northwest of the town of Barstow. These data were acquired between November 20, 2021 and January 17, 2022, by Eon Geosciences Inc., working under contract to the U.S. Geological Survey. The nominal flying height was based on a best fit, pre-planned, three-dimensional draped surface targeted at 305 m above terrain and a slope of 7%, subject to aircraft climb and descent limitations. Steep terrain [...]
Summary
This data release provides access to an aeromagnetic survey and magnetization boundaries over Garlock, California and surrounding areas in southern California. The survey extends from the city of Bakersfield across the southern Sierra Nevada and Tehachapi Mountains and west over Indian Wells Valley and the towns of Mojave and Rosamond to just northwest of the town of Barstow. These data were acquired between November 20, 2021 and January 17, 2022, by Eon Geosciences Inc., working under contract to the U.S. Geological Survey. The nominal flying height was based on a best fit, pre-planned, three-dimensional draped surface targeted at 305 m above terrain and a slope of 7%, subject to aircraft climb and descent limitations. Steep terrain in parts of the survey area required significant departures locally from the pre-planned drape surface (as much as 1752 m), and therefore variable terrain clearance should be considered when modeling and interpreting these data. Flight lines were spaced 600 m apart and directed east-west; tie lines were spaced 6000 m apart and directed north-south. A total of 26,712 line-kilometers were acquired over an area of approximately 14,800 square kilometers. The details of the Garlock aeromagnetic survey are described in the document Garlock_Tech_Report_508.pdf available for download in this data release. This report was prepared by Eon Geosciences Inc., and has not been edited. In addition, horizontal gradient maxima (garlock_mag_grad.csv) were calculated from the magnetic potential derived from these data to produce locations of crustal magnetization contrasts.
Click on title to download individual files attached to this item.
metadata_final.xml “metadata” Original FGDC Metadata
View
17.68 KB
application/fgdc+xml
garlock-magres.jpg “Aeromagnetic survey data (channel magres) and horizontal gradient maxima”
523.68 KB
image/jpeg
garlock_mag_grad.csv “horizontal gradient maxima”
372.99 KB
text/csv
“aeromagnetic survey data”
1.72 GB
text/csv
Garlock_Data_Dictionary_final.txt “data dictionary text file”
3.07 KB
text/plain
Garlock_Tech_Report_508.pdf “contractor report”
800.74 KB
application/pdf
Purpose
These data were acquired to support USGS geologic mapping efforts funded by the U.S. Geological Survey National Cooperative Mapping Program to better characterize earthquake hazards and mineral, water, and geothermal resources.
Preview Image
Aeromagnetic survey data (channel magres) and horizontal gradient maxima