Abstract:
A high resolution survey was flown opportunistically by BAS at the end of the AGAP aerogeophysical campaign during the 2008-09 Antarctic field season with NSF support from McMurdo. The main purpose was to collect data on the ice shelf for a radar pre-site survey for a major planned international ANDRILL drilling campaign at Coulman High. Due to lack of appropriate funding levels from several countries this ANDRILL drilling project has been postponed (https://www.icdp-online.org/projects/world/antarctica/coulman-high/) but the site remains nevertheless a potentially interesting target for future geoscience studies. The Coulman High project aimed to explore the range of paleo-environments, ecosystems and tectonic events that affected the Ross Sea region as it transitioned from the warm, high-CO2 Greenhouse world typical of the Eocene into the lower-CO2 and highly variable Icehouse conditions of the Oligocene and early Miocene. The aeromagnetic data released here can be used together with more extensive pre-existing international datasets to help study rift-related magmatism, faulting and sedimentary basins in the region.
Keywords:
Aerogeophysics, Aeromagnetics, Antarctica
Ferraccioli, F., & Jordan, T. (2020). High resolution aeromagnetic line data in the Ross Sea Rift collected for the ANDRILL pre-site survey (2008-09 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/74df4192-7c80-4ffa-b890-4b344cfc1bef
| Use Constraints: | This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions: 1. To cite the data in any publication as follows: Ferraccioli, F., & Jordan, T. (2020). High resolution aeromagnetic line data in the Ross Sea Rift collected for the ANDRILL pre-site survey (2008-09 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/74DF4192-7C80-4FFA-B890-4B344CFC1BEF 2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data. |
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| Creation Date: | 2020-06-29 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
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| Parameters: |
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| Personnel: | |
| Name | PDC BAS |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Fausto Ferraccioli |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Tom A Jordan |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Processing reference: Ferraccioli, F., Gambetta, M. & Bozzo, E. 1998. Microlevelling procedures applied to regional aeromagnetic data: an example from the Transantarctic Mountains (Antarctica), Geophysical Prospecting, 46, 177-196, DOI: 10.1046/j.1365-2478.1998.00080.x Fremand, A. C., Bodart, J. A., Jordan, T. A., Ferraccioli, F., Robinson, C., Corr, H. F. J., Peat, H. J., Bingham, R. G., and Vaughan, D. G.: British Antarctic Survey's aerogeophysical data: releasing 25 years of airborne gravity, magnetic, and radar datasets over Antarctica, Earth Syst. Sci. Data, 14, 3379-3410, https://doi.org/10.5194/essd-14-3379-2022, 2022. |
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| Lineage: | The ANDRILL aeromagnetic dataset includes all channels from raw through to levelled and microlevelled products. This survey forms part of the ANDRILL-UK Coulman high project investigation. Information about this project can be found at http://www.andrill.org/static/CH_Science.html. Channel naming follows SCAR/ADMAP2 data release protocols. Key data processing steps are described below, and a definition of all channels is in the table. Note in the database split by line the sections are defined as follows L= main survey grid lines, T=main survey tie lines. Magnetic data channels and processing flow: MagR- Raw magnetic total field intensity data (nT). TCorr-Corrections applied for tip tank events. MagR_TCorr- MagR corrected for tip tank events. RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2005 as implemented in Geosoft (nT). MagRT- Raw magnetic value adjusted for Tip tank events and geomagnetic reference field values. MagRT= MagR_TCorr- RefField. BCorr- Low pass filtered (60 minute) magnetic base station correction. MagBRT- calculated as MagBRT= MagRT- Bcorr. MagF- Final mag value before levelling. No additional corrections applied so MagF=MagBRT MagL- Statistically levelled mag data. MagML- Microlevelled magnetic data following technique of (Ferraccioli et al., 1998). Basic channel description: Line name Line Number Flight ID Sequential flight number x x projected meters* y y projected meters* Lon Longitude WGS 1984, Lat Latitude WGS 1984, Height_WGS1984 Aircraft altitude (meters) in WGS 1984, Date Date of flight in time format e.g. 2006/01/08 Time Time (UTC) of flight e.g. 23:52:42.0 *Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows: Latitude of false origin: -74.018118 Longitude of false origin: 179 Latitude of 1st standard parallel -72.66666666667 Latitude of 2nd standard parallel -75.33333333333 False easting 1444000 False northing 1123000 Positioning for the ANDRILL HRAM survey uses kinematic differential GPS. |
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| Project: |
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| Temporal Coverage: | |
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| Start Date | 2009-01-16 |
| End Date | 2009-01-18 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -77.91385 |
| Northernmost | -77.34185 |
| Longitude | |
| Westernmost | 170.60114 |
| Easternmost | 171.96926 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 30 meters - < 100 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | East of Ross Island |
| Sensor(s): |
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| Source(s): |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 6MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 1 ASCII XYZ file: - ANDRILL_HRAM_mag.XYZ ~6MB |