Carnarvon Basin

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The Carnarvon Basin is a geological basin located in the north west of Western Australia.[1] This is the main geological feature that makes up the North West Shelf. The onshore part of the Carnarvon Basin covers about 115,000 km² and the offshore part covers approximately 535,000 km² with water depths up to 3,500 metres. It is separated into two major areas - the Northern Carnarvon Basin, and the Southern Carnarvon Basin.

Northern Carnarvon Basin[edit]

The Northern Carnarvon Basin includes the Exmouth Plateau, Exxon Mobil, Wombat Plateau (on the northern part of the Exmouth Plateau), Investigator Sub-basin, Rankin Platform, Exmouth Sub-basin, Barrow Sub-basin, Dampier Sub-basin, Beagle Sub-basin, Enderby Terrace, Peedamullah Shelf and the Lambert Shelf.[2]

The main sub-basins for petroleum exploration in the basin have been Dampier, Exxon Mobil, Exmouth and Barrow.[3]

Southern Carnarvon Basin[edit]

The Southern basin consists of the Gascoyne, Merlinleigh, Bidgemia and Byro Sub-basins and Bernier Platform and is flanked to the east by the Archaean Pilbara Block.[2]

Impact crater[edit]

The Gnargoo structure, which has remarkable similarities to Woodleigh crater, is a proposed 75 km impact crater on the Gascoyne Platform, Southern Carnarvon Basin with an estimated age of 100-300 Ma.[4]

See also[edit]


  1. ^ for a regional perspective
  2. ^ a b Geoscience Australia - Northern Carnarvon Basin (NCB) Archived April 16, 2009, at the Wayback Machine.
  3. ^ Geoscience Australia - Petroleum exploration (NCB) Archived March 21, 2011, at the Wayback Machine.
  4. ^ R. Iaskty and A. Glikson (2005). "Gnargoo: a possible 75 km-diameter post-Early Permian – pre-Cretaceous buried impact structure, Carnarvon Basin, Western Australia", Australian Journal of Earth Sciences, Vol 52, 2005

Further reading[edit]

  • Jonasson, Karina E.(2001) Western Australia atlas of petroleum fields. Volume 2. Perth, W.A. Dept. of Minerals and Energy W.A. Petroleum Division. ISBN 1-877065-00-5

External links[edit]

Coordinates: 24°48′24″S 115°13′29″E / 24.80667°S 115.22472°E / -24.80667; 115.22472