Ngalia Basin

Sedimentary: limestone, shale, sandstone, siltstone, quartzite, glacial sediments.

Epoch Min:

Carboniferous.

Epoch Max:

Neoproterozoic.

Age Min:

300 Ma.

Age Max:

1000 Ma.

Summary:

An intracratonic basin initiated as part of the Centralian Superbasin.

Relationship:

Unconformably overlies, and is faulted against, the Palaeo-Neoproterozoic Aileron Province.

Thickness:

Up to 6 km.

Economic:

Minor gas shows. Contains significant sandstone-hosted uranium mineralisation.

Metamorphism:

Unmetamorphosed.

Main Reference:

Edgoose CJ, 2013. Chapter 24: Ngalia Basin: in Ahmad M and Munson TJ (compilers) ‘Geology and Mineral Resources of the Northern Territory’. Northern Territory Geological Survey, Special Publication 5