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Triassic Horizon Grids, Isochron Grids, and Fault Maps, Central North West Shelf

Created 20/01/2026

Updated 20/01/2026

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A regional mapping program conducted by Geoscience Australia addressed stratigraphic and structural aspects of exploration risk within the Triassic succession of the Roebuck Basin and parts of the adjacent sub-basins (central North West Shelf, Figure 1).

Seismic horizons of regional significance were mapped using 2D and 3D seismic surveys. Seismic survey coverage is shown in Figure 1. 2D surveys include regional deep surveys such as AGSO s110, AGSO s120, and PGS New Dawn. 3D surveys include Admiral, Beagle, CNOOC, Curt, Lord, Naranco, Polly, Whitetail, and a 5 x 5 km extract (used with permission) from the TGS Capreolus MC3D. Synthetic seismograms (Nguyen et al., 2019) were used to tie seismic horizons to wells.

The mapped horizons are placed within a regional tectonostratigraphic framework by Abbott et al. (2019, their Figure 2). This data pack comprises seismic horizon grids and isochron grids generated from the TR10.0_SB (base Triassic), TR17.0_SB (Mid–Triassic), and J10.0_SB (top Triassic) seismic horizons (Figure 2). Fault maps compiled at the TR10.0 _SB and J10.0_SB are also included.

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Title Triassic Horizon Grids, Isochron Grids, and Fault Maps, Central North West Shelf
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/99bd6910-b422-4e56-b003-b3c4afa906de
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 23/05/2019 - 23/05/2019
Geospatial Coverage
Map data © OpenStreetMap contributors
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Data Portal Data.gov.au