Brief description
Magnetotelluric (MT) measures the natural variations of the Earth' magnetic and electrical (telluric) fields. The Audio-Magnetotelluric method (AMT) samples signal frequencies in the range of 20k Hz down to ~1Hz and provides data pertaining to the upper few kilometres of the Earth' crust. Broadband MT (BBMT) measures frequencies ranging from ~400 Hz down to periods of ~5000 s, providing measures of the conductivity of the crust. AMT and BBMT data were acquired at 138 stations with an interval of 2.5-5.0 km along a 690 km transect extending from Four Ways to Longreach in the South-eastern Mount Isa region. Full-waveform time series data were acquired and processed into frequency-domain transfer functions. Remote reference was applied to eliminate uncorrelated noise. After quality assurance, processed data were exported to industry-standard EDI files containing site info, impedance tensor, apparent resistivity, phase and vertical transfer function.Lineage
Maintenance and Update Frequency: asNeededAs part of the Queensland Government¿s Greenfields 2020 program, Geoscience Australia and the Geological Survey of Queensland (GSQ) have undertaken the Mount Isa Geophysics Initiative program including seismic, magnetotelluric and airborne electromagnetic surveys. The aim is to investigate mineral and energy potential by improving understanding of regional sub-surface geology and cover thickness and character.
Created: 14 03 2018
Issued: 27 03 2018
Data time period: 2014-05-23 to 2014-07-15
text: westlimit=140; southlimit=-24; eastlimit=144.5; northlimit=-19
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Download the data package
uri :
https://d28rz98at9flks.cloudfront.net/104221/104221_data.zip
Related product: Electrical Conductivity Structure Derived from Magnetotelluric Data in the South-Eastern Mount Isa Region
uri :
https://pid.geoscience.gov.au/dataset/ga/104222
Explanatory note
uri :
https://d28rz98at9flks.cloudfront.net/104221/readme.txt
- global : 0b271705-0e26-4f96-a6e2-2a707f2edb4e
- URI : http://pid.geoscience.gov.au/dataset/ga/104221
- DOI : 10.4225/25/5ababcc29759a