Geoscience Australia - Product Database

Guest

prod

Fairway Ridge

Entity ID: 34863 Compiled by: Burch, G. Year: 2003 Status: Defined

Last Revised: 2013

Rank: province Type: sedimentary Subtype: rift Location: Off-shore

Synonyms: Fairway Rise Symbol: NA

Minimum age: Recent Age method: inferred, seismic interpretation

Maximum age: Early Cretaceous Age method: inferred, seismic interpretation

Summary: The Late Cretaceous to Recent Fairway Ridge is located approximately 1000 km off the east coast of Australia in water depths ranging from 200 to 3500 m and is part of the eastern flank of the Lord Howe Rise.

Attributes:
Area (square kilometres): 67000
Minimum present water depth (m): 200
Maximum present water depth (m): 3500
Main rock types: sediments and sedimentary rocks with volcaniclastic debris
speculative
Main depositional environment: marine
Minimum sediment thickness (m): 0
Maximum sediment thickness (m): 500
0.5 s TWT
Country: AUS
Country: FRA

Parent: No data

Child Provinces: No data

Relationships:
Adjoins - Fairway Basin, New Caledonia Basin

Constituent units:

Events: No data

Mineral Deposits: No data

Key Reference: Ravenne, C., de Broin, C.E., Dupont, J., Lapouille, A., Launay, J. 1977, New Caledonia Basin - Fairway Ridge: structural and sedimentary study, International Symposium on Geodynamics in Southwest Pacific, Editions Technip, Paris, , 145-154 (Refid:12688)

Comments: No data

Overview: The Fairway Ridge is situated approximately 1000 km off the east coast of Australia and is part of the eastern flank of the Lord Howe Rise. The Fairway Ridge is a relatively unknown north-northwest to south-southeast trending ridge. The Ridge narrows and deepens to the south and consists of Upper Cretaceous to Recent sediments in water depths ranging from 200 to 3500 m. The sedimentary cover on top of the Fairway Ridge thickens from 0.2 seconds two-way time in the north to 0.5 seconds two-way time in the south. In the northern part of the Ridge, the sedimentary cover is characterised by the dominance of post-Oligocene sediments that directly overly basement. Farther south, older Upper Cretaceous to Eocene sediments are interpreted to directly overlie basement. The Fairway Ridge has been affected by uplift and compression, as indicated by a deformed pre-Oligocene section and lateral variations in the ridge morphology. This uplift is correlated with a regional compressional event that affected the northern part of the southwest Pacific region during Eocene to Oligocene time. Basement on the Fairway Ridge is either volcanic or oceanic in character. However, a succession of positive and negative magnetic anomalies and a positive gravity anomaly on both the Fairway Basin and the Fairway Ridge indicates a probable oceanic origin.

Images: No data

Other media: No data

Source Information:

[Close window]

This report was generated on Sunday, April 20, 2014 11:25:24 AM EST.