Magnetotelluric Broadband Survey of Western Tasmania, 2016

Brief description

This record was harvested by RDA at 2025-03-05T09:51:55.335+11:00 from NCI's Data Catalogue where it was last modified at 2023-05-04.

Full description

A broadband MT traverse was acquired for shallower investigations of the lithosphere beneath western Tasmania. Together with the north-western traverse, these surveys transected major crustal boundaries between Precambrian Tyennan basement and the highly metalliferous Cambrian to Devonian Dundas-Fossey Trough. The MT instruments used for these broadband transects were sourced through the Australian National Seismic Imaging Resource (ANSIR) national Earth sounding instrument pool. Co-funded by AuScope and maintained by the University of Adelaide, the instrumental capability results from a collaboration between the University of Adelaide and Geoscience Australia. Each instrument consists of a 24-bit 6-channel PR6-24 Earth Data Logger housed in a reinforced Pelican case. The logger records GPS-synchronised time series electric field data from an array of three Petiau-type lead chloride non-polarisable electrodes. Magnetic field time series data are recorded from LEMI-120 induction coil output when in broadband survey mode. Powered by a 70 amp-hour 12 volt battery, the unit can log broadband data for ∼3 days without a recharge or battery replacement. Based out of Queenstown, data acquisition on the eastern end of the western transect commenced on 22nd January 2016. A remote reference site was established 5 km east of the easternmost proposed transect site. Occupation time at each site was in the order of 36-48 hours with crews deploying and retrieving two sites per day. Acquisition of all western transect sites was completed by the 6th of February. The survey covered 35 Broadband MT sites over the transect of Western Tasmania.

Credit

This dataset was supported by Mineral Resources Tasmania.

The Geophysics 2030 project received co-investment from AuScope and the Australian Research Data Commons (ARDC) to support the data curation at the National Computational Infrastructure (NCI Australia) (https://doi.org/10.47486/XN002). AuScope, the ARDC and NCI Australia are enabled by the National Collaborative Research Infrastructure Strategy (NCRIS).

Lineage

Data principally acquired and processed by Thomas Ostersen as part of his PhD research undertaken at the University of Tasmania, sponsored by Mineral Resources Tasmania, Geoscience Australia, the University of Adelaide and AuScope. Full details can be found in his thesis 'Geoelectric Structure of the Tasmanian Lithosphere from Multi-Scale Magnetotelluric Data' (http://dx.doi.org/10.25959/100.00037925) and field operations report (https://www.mrt.tas.gov.au/webdoc2/app/default/document_domrept_detail?id=119226).