Abstract:
A British Antarctic Survey Twin Otter and survey team acquired 15,500 line-km of aeromagnetic data during the 2001/02 Antarctic field season along a 1-km line spacing grid with tie-lines 8 km apart. Twenty-five flights were flown from the South African base SANAE, for a total of 100 survey hours. We present here the processedline aeromagnetic data acquired using scintrex cesium magnetometers mounted on the BAS aerogeophysically equipped Twin Otter.The aeromagnetic data were acquired at a constant barometric altitude of 2600 m.This provided a terrain clearance of 100 m over the highest peaks. The choice of a barometric survey mode was acompromise for the acquisition of reliable aerogravity data.
Data are provided as XYZ ASCII line data. This high-resolution aerogeophysical survey was part of the "Magmatism as a Monitor of Gondwanabreak-up" project (MAMOG) of the British Antarctic Survey, which included new geochemical investigations, structural geology, geochronology, and AMS studies over western Dronning Maud Land.
Keywords:
Aerogeophysical, Aeromagnetics, Antarctic
Ferraccioli, F., Jones, P., Curtis, M., Leat, P., & Riley, T. (2020). Processed line aeromagnetic data over the Jutulstraumen rift area (2001/02 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0ea3836d-ec6f-4856-b8ba-173c859372bb
| 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., Jones, P., Curtis, M., Leat, P., & Riley, T. (2020). Processed line aeromagnetic data over the Jutulstraumen rift area (2001/02 season) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0EA3836D-EC6F-4856-B8BA-173C859372BB 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: | 2019-12-04 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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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 P. C Jones |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Michael L Curtis |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Philip Leat |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Teal R Riley |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | F. Ferraccioli, P.C. Jones, M.L. Curtis, P.T. Leat, T.R. Riley. 2005. Tectonic and magmatic patterns in the Jutulstraumen rift (?) region, East Antarctica, as imaged by high-resolution aeromagnetic data. Earth Planets Space, 57, 767-780. https://doi.org/10.1186/BF03351856 F. Ferraccioli, P.C. Jones, M.L. Curtis and P.T. Leat. 2005. Subglacial imprints of early Gondwana break-up as identified from high resolution aerogeophysical data over western Dronning Maud Land, East Antarctica. Terra Nova, 17, 573-579. https://doi.org/10.1111/j.1365-3121.2005.00651.x Processing references: F. Ferraccioli, P.C. Jones, M.L. Curtis, P.T. Leat, T.R. Riley. 2005. Tectonic and magmatic patterns in the Jutulstraumen rift (?) region, East Antarctica, as imaged by high-resolution aeromagnetic data. Earth Planets Space, 57, 767-780. https://doi.org/10.1186/BF03351856 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.1365-2478.1998.0080.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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| Quality: | Tcorr and Scorr have no values. | |
| Lineage: | MAMOG aeromagnetic data and details of survey design and data processing are presented in (Ferraccioli et al, 2005). The dataset available here includes all channels from raw through to levelled and microlevlled products. Channel naming follows SCAR/ADMAP2 data release protocols. Magnetic data channels and processing flow: MagR- Raw magnetic total field intensity data (nT). MagC- Compensated, or low pass filtered magnetic data (nT). Adjustments to compensate for aircraft roll, pitch and yaw were applied. RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2000 as implemented in Geosoft (nT). MagRTC- Compensated magnetic value adjusted for Tip tanks (where used) and geomagnetic reference field values. MagRTC= MagR- RefField (nT). BCorr- Low pass filtered (30 minute) magnetic base station correction. MagBRTC- calculated as MagBRTC= MagRTC- Bcor (nT)r. ACorr- Additional correction applied to compensate for heading errors. Only applied to line and tie line segments with consistent headings. MagF- Final mag value before levelling (nT). MagL- Statistically levelled mag data (nT). MagML- Microlevelled magnetic data following technique of (Ferraccioli et al., 1998) (nT). Note tie lines are not included in the microlevelled data channel. 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 natural origin: -71 Longitude of natural origin: 0 Scale factor at natural origin -75.33333333333 False easting 0 False northing 2082760.109 |
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| Temporal Coverage: | |
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| Start Date | 2002-01-05 |
| End Date | 2002-02-16 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -73.9 |
| Northernmost | -71.2 |
| Longitude | |
| Westernmost | -7 |
| Easternmost | 3.6 |
| 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 | Jutulstraumen rift area |
| Sensor(s): |
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| Source(s): |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 93 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 1 ASCII XYZ file: -MAMOG_Mag.XYZ ~93 MB |