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New statewide 3D model

Mineral Resources Tasmania has produced a new version of its statewide 3D geological model.

When originally released in 2004, the model package was the first such construction for an entire jurisdiction in the world. The 2023 revision adds several new geophysical datasets and models, including:

  • the Tasmanian leg of AusLAMP MT, a resistivity model spanning from surface through to lithospheric mantle depths (Ostersen 2021);
  • two regional shear wave velocity models derived from ambient seismic noise measurements (Young et al. 2013; Mineral Resources Tasmania in prep.);
  • and a refined top surface of granitoids in eastern Tasmania from new 2D modelling based on significant revisions to the regional gravity model (Leaman 2012).

The model package, also contains updated gravity and magnetic grids, including the major 2021 and 2022 extensions of modern magnetic data coverage to eastern and southern Tasmania.

Geological objects in the model have been updated with current stratigraphic nomenclature and clearer fault names. The package and explanatory notes can be downloaded from the MRT website.