Authors / CoAuthors
Poudjom Djomani, Y.
Abstract
<p>The Northern Territory Geological Survey (NTGS) designed the Mount Peake-Crawford survey to provide high resolution magnetic, radiometric and elevation data in the area. It is anticipated that the data from the survey would help attract explorers into ‘greenfield’ terranes and contribute to the discovery of the next generation of major mineral and energy deposits in the Northern Territory. A total of 120,000 line km of regional data (200m line spacing) and additional infill data (100m line spacing), flown at 60m flight height were acquired during the survey between July and October 2019. The survey was managed by Geoscience Australia. <p>Various grids were produced from the Mount Peake-Crawford Airborne Magnetic and Radiometric Survey dataset and simultaneously merged into a single grid file. The final grid retains all of the information from the input data and is levelled to the national map compilations produced by Geoscience Australia. The merged grids have a cell size of 20m. <p>The following merged grids are available in this download: <p>• Laser-derived digital elevation model grids (m). Height relative to the Australian Height Datum. <p>• Radar-derived digital elevation model grids (m). Height relative to the Australian Height Datum. <p>• Total magnetic intensity grid (nT). <p>• Total magnetic intensity grid with variable reduction to the pole applied (nT). <p>• Total magnetic intensity grid with variable reduction to the pole and first vertical derivative applied (nT/m). <p>• NASVD-filtered potassium concentration grid (%). <p>• NASVD-filtered thorium concentration grid (ppm). <p>• NASVD-filtered uranium concentration grid (ppm).
Product Type
dataset
eCat Id
134773
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Resource provider
Keywords
- theme.ANZRC Fields of Research.rdf
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- Magnetism and PalaeomagnetismEARTH SCIENCESGEOPHYSICS
- ( Theme )
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- radiometrics
- ( Theme )
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- elevation
- ( Theme )
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- DEM
- ( Theme )
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- gamma-ray
- ( Place )
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- Northern Territory
- ( Sub-Topic Category )
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- uranium
- ( Sub-Topic Category )
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- thorium
- ( Sub-Topic Category )
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- potassium
- ( Sub-Topic Category )
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- total magnetic intensity
- ( Sub-Topic Category )
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- reduction to the pole
- ( Sub-Topic Category )
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- first vertical derivative
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- Published_External
Publication Date
2020-03-30T22:04:53
Creation Date
Security Constraints
Legal Constraints
Status
completed
Purpose
Analysis
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
Various grids were produced from the Mount Peake-Crawford Airborne Magnetic and Radiometric Survey dataset and simultaneously merged into a single grid file. The final grids retains all of the information from the input data and are levelled to the national map compilations produced by Geoscience Australia, as well as to the Australia-Wide Airborne Geophysical Surveys (AWAGS, Milligan et al., 2009). The merged grids have a cell size of 0.000189 degrees or approximately 20m. Original point-located data is available from: https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/89885. The final grids were generated from the NTGS dataset using Intrepid v5.6.4 and merged using a process developed within Geoscience Australia referred to as Grid Merge (Minty et al., 2003). The Grid Merge process is implemented in Intrepid software's Grid Merge Tool. References Milligan, P.R., Minty, B.R.S., Richardson, M. and Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. ASEG Extended Abstracts, 2009 (1), 1-9. Minty, B.R.S., Milligan, P.R., Luyendyk, A.P.J. and Mackey, T., 2003, Merging airborne magnetic surveys into continental-scale compilations. Geophysics, 68 (3), 988-995.
Parent Information
Extents
[-44, -9, 112, 154]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Source Information