Schennen, Stephan; Tronicke, Jens; Wetterich, Sebastian; Allroggen, Niklas; Schwamborn, Georg; Schirrmeister, Lutz (2016): 3D ground penetrating radar (GPR on a late Pleistocene ice complex in northern east Siberia, Bol'shoy Lyakhovsky, Russia, August 2014. PANGAEA, https://doi.org/10.1594/PANGAEA.859798, Supplement to: Schennen, S et al. (2016): 3D ground-penetrating radar imaging of ice complex deposits in northern East Siberia. Geophysics, 81(1), WA195-WA202, https://doi.org/10.1190/geo2015-0129.1
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Ice complex deposits are characteristic, ice-rich formations in northern East Siberia and represent an important part in the arctic carbon pool. Recently, these late Quaternary deposits are the objective of numerous investigations typically relying on outcrop and borehole data. Many of these studies can benefit from a 3D structural model of the subsurface for upscaling their observations or for constraining estimations of inventories, such as the local carbon stock. We have addressed this problem of structural imaging by 3D ground-penetrating radar (GPR), which, in permafrost studies, has been primarily used for 2D profiling. We have used a 3D kinematic GPR surveying strategy at a field site located in the New Siberian Archipelago on top of an ice complex. After applying a 3D GPR processing sequence, we were able to trace two horizons at depths below 20 m. Taking available borehole and outcrop data into account, we have interpreted these two features as interfaces of major lithologic units and derived a 3D cryostratigraphic model of the subsurface. Our data example demonstrated that a 3D surveying and processing strategy was crucial at our field site and showed the potential of 3D GPR to image geologic structures in complex ice-rich permafrost landscapes.
Latitude: 73.336330 * Longitude: 141.328290
We collected 3D GPR data on a late Pleistocene ice complex on Bol'shoy Lyakhovsky in northern East Siberia (Russia). Data were acquired in August 2014 using a Sensors & Software pulseEKKO Pro GPR system that was equipped with a pair of 100 MHz antennas in a common offset configuration (1 m Offset). For positioning we used a Leica TPS 1200 self-tracking total station. A detailed description of our survey site can be found in Schwamborn and Wetterich (2015).
This dataset comprises the following files:
- 01_3DGPR_IceComplex_Gridded.segy contains unmigrated data after time-zero correction, DC removal, zero-phase band-pass filtering and natural neighbor-based gridding
- 02_3DGPR_IceComplex_Migrated.segy contains the result after additional application of a topographic migration.
- 03_DEM_IceComplex.txt contains the digital elevation model derived by our self-tracking total station.
- 04_DEM_StratigraphicUnits.tif contains DEM and position of identified major stratigraphic interfaces (Band 1: DEM, Band 2: Yedoma Base, Band 3: Kuchchugui Base) for GIS applications.