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Chirp seismic reflection - shotpoints, tracklines, profile images, and SEG-Y traces for EdgeTech SB-512i chirp data collected during USGS field activity 2017-002-FA

Dates

Publication Date
Start Date
2017-08-26
End Date
2017-09-05

Citation

Baldwin, W.E., Moore, E.M., Worley, C.R., Nichols, A.R., and Ruppel, C.D., 2020, Marine geophysical data collected to support methane seep research along the U.S. Atlantic continental shelf break and upper continental slope between the Baltimore and Keller Canyons during U.S. Geological Survey Field Activities 2017-001-FA and 2017-002-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9Y1MSTN.

Summary

In spring and summer 2017, the U.S. Geological Survey’s Gas Hydrates Project conducted two cruises aboard the research vessel Hugh R. Sharp to explore the geology, chemistry, ecology, physics, and oceanography of sea-floor methane seeps and water column gas plumes on the northern U.S. Atlantic margin between the Baltimore and Keller Canyons. Split-beam and multibeam echo sounders and a chirp subbottom profiler were deployed during the cruises to map water column backscatter, sea-floor bathymetry and backscatter, and subsurface stratigraphy associated with known and undiscovered sea-floor methane seeps. The first cruise, known as the Interagency Mission for Methane Research on Seafloor Seeps and designated as field activity 2017-001-FA, [...]

Contacts

Attached Files

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

2017-002-FA_SB512i_Images.zip
“Compressed zip archive of EdgeTech SB512i chirp seismic profiles in PNG format.”
165.63 MB
2017-002-FA_SB512i_shtnav.csv
“Comma-separated formatted text file containing all EdgeTech SB512i shot points.”
16.75 MB

“Compressed zip archive of EdgeTech SB512i chirp seismic profiles in Segy format.”
6.74 GB
2017-002-FA_SB512i_browse.jpg
“Example chirp seismic-reflection profile image.”
thumbnail 133.97 KB
Shapefile: 2017-002-FA_SB512i_sht100.zip
2017-002-FA_SB512i_sht100.cpg 5 Bytes
2017-002-FA_SB512i_sht100.dbf 1.73 MB
2017-002-FA_SB512i_sht100.prj 135 Bytes
2017-002-FA_SB512i_sht100.sbn 10.69 KB
2017-002-FA_SB512i_sht100.sbx 364 Bytes
2017-002-FA_SB512i_sht100.shp
“Shapefile containing EdgeTech SB512i shot points (100 shot reference interval).”
29.3 KB
2017-002-FA_SB512i_sht100.shx 8.44 KB
Shapefile: 2017-002-FA_SB512iTracklines.zip
2017-002-FA_SB512iTracklines.shx 508 Bytes
2017-002-FA_SB512iTracklines.shp
“Shapefile containing EdgeTech SB512i tracklines.”
1.51 MB
2017-002-FA_SB512iTracklines.sbx 132 Bytes
2017-002-FA_SB512iTracklines.sbn 596 Bytes
2017-002-FA_SB512iTracklines.prj 145 Bytes
2017-002-FA_SB512iTracklines.dbf 91.42 KB
2017-002-FA_SB512iTracklines.cpg 5 Bytes

Purpose

This dataset contains shotpoint and trackline navigation, profile images, and raw SEG-Y trace data for approximately 222 km of EdgeTech 512i chirp seismic-reflection data collected by the U.S. Geological Survey during USGS field activity 2017-002-FA (also referred to as HRS1713) along the U.S. Atlantic continental shelf break and upper continental slope between Accomac and Keller Canyons. Images of each seismic profile were generated in order to provide portable and easily viewable alternatives to the SEG-Y versions of the data. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2017-002-FA_SB512iTracklines.shp'. Shotpoint index and tick marks along the top of the PNG images correlate to the positions of 100 shot intervals within the Esri point shapefile '2017-002-FA_SB512i_sht100.shp'. This information allows for spatial correlation of chirp seismic-reflection profiles images with other geophysical and sample data for investigating sea-floor morphology and stratigraphy in the area.

Additional Information

Shapefile Extension

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name2017-002-FA_SB512iTracklines.shp
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