AEM for Leigh Creek-Marree Structural Mapping Tania Wilson (Geological Survey of SA) and Ian Roach (Geoscience Australia)

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Presentation transcript:

AEM for Leigh Creek-Marree Structural Mapping Tania Wilson (Geological Survey of SA) and Ian Roach (Geoscience Australia)

AEM Survey Location QUESTION… In a deformed geological environment, can AEM detect accurate structural data? ANSWER… Yes DISCLAIMER… Approach with CAUTION!

AEM Survey Location Focused on the NW corner of the AEM survey area. Outcropping Neoproterozoic basement. Late Triassic Leigh Creek Coal Measures.

AEM Survey Data SBS 400m LBL 400m Depth Slices Elevation Slices Depth of Investigation Conductance

Regional Scale Faults GoCAD t Surfaces 5km line spacing x10 V.E.

Bedding Georeferenced jpegs 5km line spacing x7.5 V.E.

Data Artefacts Georeferenced jpegs 5km line spacing x7.5 V.E.

Witchelina Diapir GoCAD t Surfaces 5km line spacing x10 V.E.

Witchelina Diapir Georeferenced jpegs 5km line spacing x7.5 V.E.

Skillogalee Dolomite Georeferenced jpegs 5km line spacing x7.5 V.E.

Tapley Hill Formation GoCAD t Surfaces 5km line spacing x10 V.E.

Leigh Creek Coal Measures 5-10m Depth Slice

Conclusions Regional scale faults. Bedding. Potential to detect facies variations. 3D mapping of diapirs. Potential for target generation.