Lawn Hill Platform

Lithology:

Sedimentary and minor volcanic: sandstone, siltstone, shale, dolostone, basalt, rhyolite, conglomerate.

Epoch Min:

Mesoproterozoic.

Epoch Max:

Palaeoproterozoic.

Age Min:

1550 Ma.

Age Max:

1780 Ma.

Summary:

A variably deformed sedimentary basin. Major exposures in Queensland.

Relationship:

Unconformably overlies Palaeoproterozoic Murphy Province. Unconformably overlain by Mesoproterozoic South Nicholson Basin and Neoproterozoic to Palaeozoic Georgina Basin. Stratigraphic equivalents to Palaeo- and Mesoproterozoic units of the McArthur Basin

Thickness:

At least 8 km.

Economic:

Hosts minor base metal occurrences in Northern Territory. Hosts Century Zn mine in Queensland.

Metamorphism:

Unmetamorphosed.

Main Reference:

Ahmad M and Munson TJ, 2013. Chapter 18: Lawn Hill Platform: in Ahmad M and Munson TJ (compilers) ‘Geology and Mineral Resources of the Northern Territory’. Northern Territory Geological Survey, Special Publication 5