Product catalogue
GA310 South West Margin 2D MSS, magnetic line data
Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the GA310 South West Margin 2D MSS were acquired for Geoscience Australia in 2008/2009 as part of the Australian Government's Offshore Energy Security Program. This survey acquired a range of pre-competitive geological and geophysical data that included seismic reflection, gravity, magnetic and swath bathymetry measurements, as well as seafloor dredge samples. A total of 26,000 line-kilometres of magnetic and gravity data were acquired during this survey.
Simple
Identification info
- Date (Creation)
- 2020-07-06
- Date (Publication)
- 2020-07-14T05:30:44
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/140143
Identifier
- Codespace
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Digital Obejct Identifier
- Status
- Required
- Point of contact
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Role Organisation / Individual Name Details Resource provider Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Poudjom Djomani, Y.
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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GEOPHYSICS
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Magnetism and Palaeomagnetism
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EARTH SCIENCES
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- Theme
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magnetic
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- Feature type
-
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line
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- Feature type
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vector
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- Platform
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shipborne
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- Platform
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marine
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- Project
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GA310
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- Place
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South West Margin
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- Place
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SW margin
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Download the data [68.4 MB]
Download the data [68.4 MB]
- Distribution format
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nc
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Resource lineage
- Statement
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This data is a shipborne-derived magnetic line dataset for the GA310 South West Margin 2D MSS seismic survey. The data was acquired for Geoscience Australia in 2008/2009 under the project No. GA310 as part of the Australian Government's Offshore Energy Security Program. A total of 26,000 line-kilometres of gravity and magnetic data were acquired during this seismic survey.
Levelling is a key step in processing shipborne gravity data. This process minimises the mistie errors at ship-track cross-overs that arise from factors such as positioning errors, instrument drift and lack of diurnal corrections to magnetic data. Without accounting for these cross-over errors, gridded data can be rendered un-interpretable by artefacts and distortions at line cross-overs. The data processing and levelling were conducted using the INTREPID software from Intrepid Geophysics. The processed data was checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. Further up to date information about individual surveys can also be obtained online from the Airborne Surveys Database at http://www.ga.gov.au/oracle/argus/.\n\nReferences:\nIntrepid Geophysics, http://www.intrepid-geophysics.com .\nPercival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/a09d0bab-5f74-4ed1-bbce-53c3e35b5ff5
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Poudjom Djomani, Y.
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/140143
- Date info (Creation)
- 2020-07-06T06:42:25
- Date info (Revision)
- 2020-07-06T06:42:25
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/140143