Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019
Dates
Publication Date
2020-09-16
Start Date
2019-04-14
End Date
2019-05-19
Citation
Hoogenboom, B.E., Deszcz-Pan, M., Anderson, E.D., Rodriguez, B.D., Smith, B.D., and Yager, D.B., 2020, Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019: U.S. Geological Survey data release, https://doi.org/10.5066/P98SED0J.
Summary
Note: this data release has been deprecated. Please see new data release here: https://doi.org/10.5066/P92IADBP. Airborne electromagnetic (AEM) and magnetic survey data were collected during April and May 2019 along 1,467 line-kilometers in the San Juan-Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field. Data were acquired by Geotech, Ltd. with the versatile time-domain electromagnetic (VTEM) system together with a Geometrics optically pumped cesium vapor magnetometer. The survey was flown at a mean flight height of 140 meters (m) above terrain in various line directions and line spacings ranging from 150 m to 600 m. Multiple variable-spaced lines were flown along rivers and streams in the survey area. [...]
Airborne electromagnetic (AEM) and magnetic survey data were collected during April and May 2019 along 1,467 line-kilometers in the San Juan-Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field. Data were acquired by Geotech, Ltd. with the versatile time-domain electromagnetic (VTEM) system together with a Geometrics optically pumped cesium vapor magnetometer. The survey was flown at a mean flight height of 140 meters (m) above terrain in various line directions and line spacings ranging from 150 m to 600 m. Multiple variable-spaced lines were flown along rivers and streams in the survey area. USGS provided the contractor with the San Juan National Forest Lidar Point Cloud elevation dataset imported from the USGS National MAP 3D Elevation Program (U.S. Geological Survey, 2019).
Minimally processed data from production flights are provided and described in the data dictionary and contractor's report. The complete data package received from the contractor is included in a separate zip-file directory and described in the contractor's report. This data release provides minimally processed data only as provided by the contractor.
Reference:
U.S. Geological Survey, The National Map, 2019, 3DEP products and services: The National Map, 3D Elevation Program Web page, accessed April 2019 at https://nationalmap.gov/3DEP/3dep_prodserv.html
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Purpose
The purpose of this data release is to provide airborne electromagnetic (AEM) data to the public. The survey was conducted as part of a study of the hydrogeologic framework of the San Juan-Silverton caldera complex. The survey was designed to help characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and to improve knowledge of shallow to deep faults and vein-structures that were conduits for hydrothermal fluids that formed mineral deposits. The study also has general applications to mineral resource assessments in other areas of the world, and in identifying possible groundwater flow paths and associated geochemistry important in abandoned mine lands cleanup.
