Authors / CoAuthors
Crowe, M.C.A.
Abstract
The 2016 Southern Thomson Orogen VTEM™Plus AEM Survey was conducted by Geoscience Australia as part of a collaborative investigation between the Commonwealth of Australia (Geoscience Australia) and its partners the State of New South Wales (Department of Trade and Investment, Geological Survey of New South Wales) and the State of Queensland (Department of Natural Resources and Mines, Geological Survey of Queensland). The Project aims to better understand the geological character and mineral potential of the southern Thomson Orogen region, focusing on the border between New South Wales and Queensland, by acquiring and interpreting multi-disciplinary geophysical, geochemical and geological data. The primary intended impact of this work is to provide the mineral exploration industry with pre-competitive data and knowledge that reduces risk and encourages mineral exploration in the region. Geoscience Australia contracted Geotech Airborne Pty Ltd to acquire VTEM™Plus AEM data over part of the Southern Thomson Orogen in Queensland and New South Wales in May and June 2016.The data were also processed by Geotech Airborne Ltd using its FullWaveForm® processing techniques. The survey area consists of 2415 line km of time-domain AEM geophysical data acquired in five survey blocks. The majority of traverse lines were spaced at 5000 m in an east-west direction, further details about each blocks flight line specifications can be found in Table 1. The original data supplied by Geotech Airborne Pty Ltd has been modified to contain the final data fields of principal interest, enabling a manageable data file size. This data is available from Geoscience Australia's website free of charge. The comprehensive dataset is available from Geoscience Australia by emailing mineralgeophysics@ga.gov.au. The data release package includes: - Point-located electromagnetic dB/dt and derived B-field data with associated position, altimeter, orientation, magnetic gradiometer, and derived ground elevation data. These data are in ASCII column format with associated README and ASEG-GDF2 header files. The dataset consists of a separate download file for the: - Survey Lines - Repeat lines - Waveform files for every flight containing the 192 kHz sampling of the transmitter current and receiver waveforms. - Point-located conductivity estimates derived using the EM Flow® conductivity depth imaging (CDI) algorithm with associated position, altimeter, orientation, magnetic gradiometer, and derived ground elevation data. Data include the conductivity estimate for each 5 m interval and selected depth slices. - Gridded data, at 1 km cell size in, for the conductivity depth slices derived from the EM Flow® CDI data, magnetics and elevation data in ER Mapper® binary raster grid format with associated header files. - Graphical multiplots, in PDF format, for each flight line showing EM Flow® CDI sections and profiles of Z-component dB/dt data, magnetics, powerline monitor, height and orientation data. - Contractor supplied Operations Report. - ESRI shapefiles and KML files of flight lines. - Metadata and License files.
Product Type
dataset
eCat Id
102781
Contact for the resource
Publisher
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
- ( Product )
-
- Airborne Digital Data
- ( Data centre )
-
- Point Located
- ( Discipline )
-
- geophysics
- ( Place )
-
- AU-QLD
- ( Place )
-
- AU-NSW
- ( Discipline )
-
- Electrical and Electromagnetic Methods in Geophysics
- ( Discipline )
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- Airborne Electromagnetics (AEM)
- Australian and New Zealand Standard Research Classification: Fields of Research
-
- Earth Sciences
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- Published_External
Publication Date
2017-05-19T11:00:00
Creation Date
2016-12-14T00:00:00
Security Constraints
Legal Constraints
Status
Purpose
Release Airborne Electromagnetic Data to the public domain
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
Not supplied
Parent Information
Extents
[-30.8, -27.8, 143.6, 146]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
EM Flow® 2D Conductivity Depth Images
Point-located CDI section data
Point-located CDI depth slice data
Contractor supplied operations and processing Report
Point-located CDI section subsampled data
Point-located CDI depth slice subsampled data
Point-located electromagnetic subsampled data
Source Information
AEM dataset of the Southern Thomson 500000 143.6 146 -30.8 -27.8