Alberton-Mathinna
| 'Gold corridor' region. Composed from cross-sections by Michael Vicary (north) and David Green (south) in conjunction with earlier geophysical modelling by Michael Roach. Version 1 had magnetic unit geometry unmodified from the source material. Version 2 incorporates magnetic body geometries modified via 3D inversion, followed by 3D gravity inversion. |
Geoelectric Structure of the Tasmanian Lithosphere from Multi-Scale Magnetotelluric Data
| Geoscience Analyst project containing all models presented in Ostersen PhD thesis in addition to a compilation of previous Statewide 3D data |
Lebrina
| Preliminary, circa 2011 with some geophysical inversion issues arising from early versions of GeoModeller software |
Lily-Lagoon
| Geological and geophysical model based on new 1:25,000 mapping |
Mt Lindsay-Lynch Hill
| Constrained gravity and magnetic inversion using UBC-GIF |
Rosebery-Lyell
| Extension and refinement of previous MRT 3D models in the region. Expresses a new structural synthesis based on mapping and multiple cross sections produced by numerous geologists over several decades. Extends to a depth of 10 km. Constrained by 3D geophysical modelling using MRT's gravity and magnetic survey data coupled with drilling and rock physical property databases. This information has been used to derive uncertainty estimates for each element in the model volume. The model files also include nominal density and magnetic susceptibility estimates obtained for each voxel, thus incorporating intra-unit variations.
The geological model was constructed using the GOCAD® Mining Suite from Mira Geoscience, with initial geophysical inversions via the VPmg code. Further geophysical modelling and uncertainty characterisation was carried out with the GeoModellerTM software from Intrepid Geophysics. |
Scamander
| Created as part of the TasExplore Project in 2011-2012. A series of 1:50,000 geological cross-sections were prepared by Michael Worthing and Ian Woolward based on detailed mapping of the Mathinna Group in the Dublin Town, Brilliant, Falmouth and Beaumaris areas (See ER25_3). The cross-sections were scanned and imported into Skua for digitisation and modelling by Daniel Bombardieri. The form of the Devonian granite surface within the model area was revised by Mark Duffett and Daniel Bombardieri following gravity inversion. |
Statewide - revised
| The State-wide 3D geological model released by MRT in 2004 (Murphy et al 2004) was the first such construction for an entire jurisdiction in the world. This 2023 re-release incorporates the original State-wide 3D model with new additions which include the 2012 granite surface model by Leaman (2012), a 3D shear wave velocity model from ambient seismic noise dispersion measurements (Young et al 2013), a regional-scale 3D resistivity model (Ostersen, TCH 2021) spanning from the surface through to lithospheric mantle depth range, and the most recent state-wide gravity map and magnetic map which incorporates the recent 2021 Tiers and 2022 South East Tasmania magnetic Surveys.
The State-wide model is being distributed primarily as a Geoscience ANALYST project. Geoscience ANALYST is visualisation and communication software for GoCAD® 3D models, made freely available by Mira Geoscience. http://geoscienceanalyst.com |