Halls Creek Orogen

Lithology:

Metamorphic, igneous and volcanic: phyllite, schist, rhyolite, rhyodacite, granite and dolerite.

Epoch Min:

Palaeoproterozoic.

Epoch Max:

Palaeoproterozoic.

Age Min:

1800 Ma.

Age Max:

1870 Ma.

Summary:

Palaeoproterozoic metasedimentary, intrusive and volcanic rocks forming part of the North Australian Craton. Mainly exposed in Western Australia

Relationship:

Unconformably overlain by Palaeo-Mesoproterozoic Fitzmaurice, Neoproterozoic Wolfe and Phanerozoic Bonaparte basins.

Thickness:

N/A

Economic:

No known mineral occurrences in Northern Territory. In Western Australia hosts mafic-hosted Ni-Cu and PGE mineralisation, diamonds, VMS-style base metals and orogenic gold mineralisation.

Metamorphism:

Greenschist to amphibolite facies.

Main Reference:

Ahmad M and Scrimgeour IR, 2013. Chapter 7: Halls Creek Orogen: in Ahmad M and Munson TJ (compilers) ‘Geology and Mineral Resources of the Northern Territory’. Northern Territory Geological Survey, Special Publication 5