Abstract:
This is an electric log of a borehole drilled by hot water to 120 m (Site 1) on Larsen C Ice Shelf, Antarctic Peninsula. The borehole was drilled in December 2022 to investigate the internal properties of a suture zone (Site 1) and a meteoric ice band (Site 2) of an ice shelf, as part of the NERC-funded RiPIce (Rift Propagation for Ice sheet models) research project.
NERC standard grant NE/T008016/1.
Keywords:
Antarctica, Larsen C, electric log, ice borehole
Hubbard, B., Miles, K., & RiPIce Project Team (2024). Borehole electric log from the southern sector of Larsen C Ice Shelf, Antarctic Peninsula, December 2022 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/f7d8439f-eea3-4edb-be2e-99b290a82f06
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2024-12-12 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Bryn Hubbard |
| Role(s) | Investigator, Technical Contact |
| Organisation | Aberystwyth University |
| Name | Katie Miles |
| Role(s) | Investigator |
| Organisation | Aberystwyth University |
| Name | RiPIce project team |
| Role(s) | Investigator |
| Organisation | RiPIce project |
| Parent Dataset: | N/A |
| Quality: | Data are unaltered from those logged in the field. Due to the field site location on an ice shelf, the voltage reference fish was submerged in the ice surface around 5 m from the winch and 15 m from the borehole. Missing data are presented as -999.5. | |
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| Lineage: | The dataset is an electric log from a borehole drilled to 120 m (Site 1) on Larsen C Ice Shelf, Antarctica, in December 2022. It was acquired using a slim-hole electric borehole probe manufactured by Robertson Geologging Ltd, which is comprised of a source electrode that emits a low-frequency bi-directional electric current. Boreholes were logged whilst the electric probe was travelling up the borehole. | |
| Temporal Coverage: | |
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| Start Date | 2022-12-02 |
| End Date | 2022-12-02 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -68.0086 |
| Northernmost | -68.0086 |
| Longitude | |
| Westernmost | -64.3668 |
| Easternmost | -64.3668 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | 50.251 m |
| Depth | |
| Min Depth | 0 m |
| Max Depth | 120 m |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | N/A |
| Vertical Resolution | 0.01 m |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Larsen C ice shelf |
| Data Collection: | Logs were acquired using Robertson Geologging electric probe, mini winch and Micrologger II. |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 430 kB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | The data is stored in a comma-separated ASCII file (*.csv format). The file name consists of RIPICE, the site number, and ElectricLog. The depth (in metres) each measurement is made at is presented in the first column. Columns two to five present the single-point resistance (Ohms), long normal resistivity (Ohm metres), short normal resistivity (Ohm metres), and self-potential (millivolts), respectively. Values of -999.5 indicate no data or an erroneous reading, which mostly refer to shallower depths at which the probe and following 10 m of insulated cable were not submerged below water level, preventing the electric signal being transmitted back to the surface. |