Geoscience Australia - Product Database



Eastern Plateau

Entity ID: 34870 Compiled by: Burch, G. Year: 2003 Status: Informal

Last Revised: 2013

Rank: province Type: sedimentary Subtype: undefined Location: QLD Off-shore

Synonyms: Papuan Plateau Symbol: NA

Minimum age: Recent Age method: inferred, seismic interpretation

Maximum age: Eocene Age method: inferred, seismic interpretation

Summary: The poorly known, Eocene to Recent Eastern Plateau is located between Queensland and Papua New Gunea and contains a maximum of 3 km of marine sediments.

Area (square kilometres): 50000
State: QLD
Minimum present water depth (m): 20
Maximum present water depth (m): 3000
Main rock types: carbonate sediments and sedimentary rocks
Main depositional environment: marine
Maximum sediment thickness (m): 3000
Present crustal setting: continental
Country: PNG
Country: AUS

Parent: No data

Child Provinces: No data

Adjoins - Papuan Basin, Queensland Basin

Constituent units:

Events: No data

Mineral Deposits: No data

Key Reference: Davies, P.J., Symonds, P.A., Feary, D.A., Pigram, C.J. 1989, The evolution of carbonate platforms of northeast Australia, Society of Economic Paleontologists and Mineralogists, Special Publication, 44, 233-258., (Refid:19923)

Comments: No data

Overview: The Eastern Plateau lies midway between Australia and Papua New Guinea, and is the northernmost marginal plateau of the northeast Australian continental margin. The plateau has a gently convex surface and covers an area of about 50,000 square km in water depths ranging from 20 m to 3000 m. There is one site of active reef growth, Eastern Fields Reef, on the northern margin of the Plateau, with submerged and buried reefs extending northeast into the Moresby Trough. The Eastern Plateau is bound to the north by the Moresby and Pandora troughs, to the west by the Bligh Trough, to the south by the Osprey Embayment, and to the east by the Moresby Canyon and the Coral Sea Basin. The northern and southern plateau margins are controlled by normal faults, while the western margin has been highly deformed by thrusts and wrench faulting. The eastern margin of the plateau has been deformed by collision with the terranes of the Papuan Peninsula. As the plateau is surrounded by troughs, it is generally free of terrigenous sediments. The Eastern Plateau is underlain by deformed, fault-bounded, and tilted basement blocks of approximately Late Cretaceous-age. Eocene sediments onlap the eroded surface of basement blocks, and are commonly disturbed by faulting. The remaining sediments on the Eastern Plateau are a mix of Miocene to Recent calcareous ooze and periplatform detritus.

Images: No data

Other media: No data

Source Information:

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This report was generated on Monday, June 18, 2018 11:38:43 AM EST.