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Laura-Lakefield Basin

Entity ID: 22401 Compiled by: Taubert, S. Year: 2002 Status: Informal

Last Revised: 2013

Rank: province Type: sedimentary Subtype: polyhistory Location: QLD On-shore and off-shore

Synonyms: Laura Basin; Lakefield Basin Symbol: NA

Minimum age: Early Cretaceous Age method: inferred, biostratigraphic correlation

Maximum age: Middle Jurassic Age method: inferred, biostratigraphic correlation

Summary: The Laura Basin is a coastal, frontier, sag basin in northeast Queensland, comprising Middle Jurassic to Early Cretaceous sediments. It overlies Permian rift sediments of the Lakefield Basin.

Attributes:
Area (square kilometres): 47000
State: QLD
Minimum present water depth (m): 0
Maximum present water depth (m): 200
Main rock types: siliciclastic sediments and sedimentary rocks
fluvial-deltaic massive conglomerate and sandstone
Main rock types: carbonate sediments and sedimentary rocks
minor during latest Jurassic to Early Cretaceous
Main depositional environment: marine and non-marine
marginal marine carbonates were developing along the western margin of the basin
Main depositional environment: non-marine
Laura Basin: Middle Jurassic to Early Cretaceous, fluvial, coal swamp and delta.
Minimum sediment thickness (m): 0
Maximum sediment thickness (m): 10000
Resources: Oil
Shows only. Oil in core Ebagoola 1, gas in Marina 1, stains/fluorescence in 3 other wells.
Resources: Coal - black
Coking. 'In deep and generally thin seams' (Bain & Draper 1997, AGSO Bull 240, p.544.).
Country: AUS

Parent: No data

Child Provinces: No data

Relationships:
Adjoins - Carpentaria Basin, Queensland Basin [Offshore, at continental shelf-slope boundary.]
Overlies - Hodgkinson Province [Onshore, to south.], Iron Range Province, Mossman Orogen, Thomson Orogen, Yambo Subprovince [Onshore, to south.]

Constituent units: Dalrymple Sandstone (Laura Basin basal formation.), Gilbert River Formation (Laura Basin middle formation.), Little River Coal Measures (Lakefield Basin equivalents.), Normanby Formation, Rolling Downs Group (Laura Basin upper formation.)

Events: Late Cretaceous uplift

Mineral Deposits: No data

Key Reference: Wellman, P. 1995, The Lakefield Basin: a new Permian basin in far North Queensland, Queensland Government Mining Journal, 96, 19-23 (Refid:12577)

Comments: The Lakefield, Laura, and Kalpowar Basins are stacked basins.

Overview: The Laura Basin is located in northeast Queensland, occupying 18,000 sq. km onshore and 16,000 sq. km offshore, under water depths of less than 200 m. The basin comprises approximately 2,000 m of Middle Jurassic to Early Cretaceous sediments, and overlies up to 10,000 metres of Permian sediments of the Lakefield Basin. The Laura Basin is bound to the west by the Coen Inlier; to the south by the Hodgkinson Province and Yambo Inlier, and to the north and east offshore by the Queensland Basin and undefined continental shelf basement. The Lakefield Basin is a Permian intracratonic rift basin with a current area of some 10,000 sq. km onshore and 3,000 sq. km offshore, underlying the central Laura Basin. The Lakefield Basin may have covered a far larger area in the past, and included Triassic sediments, before some 2 km of section was removed by Middle to Late Triassic uplift and erosion. Only the uppermost part of the Lakefield Basin has been intersected, by 4 onshore petroleum exploration wells (Dec 2002) that encountered a fluvio-deltaic sequence. The Laura Basin is a Jurassic to Cretaceous intra-cratonic sag basin, initiated by renewed movement along the Palmerville Fault. Initial fluvial sedimentation of the Dalrymple Sandstone was deposited over a rugged erosional surface, but upper parts of that formation were deposited in delta-plain to marginal marine environments. The overlying, conformable Gilbert River Formation was then deposited during the Late Jurassic to Early Cretaceous in fluvial to marginal marine environments. Rapid subsidence during the Aptian led to the deposition of the shallow marine, conformable Rolling Downs Group. Laura Basin sedimentation was terminated by Late Cretaceous uplift and erosion. The Laura Basin is overlain onshore by thin Cainozoic fluvial sediments of the Kalpowar Basin. No petroleum discoveries have been made in the Lakefield or Laura Basins, although gas shows have been encountered in each basin. The offshore Laura-Lakefield Basins lie within the Great Barrier Marine Park, in which petroleum exploration activity is prohibited. The Lakefield National Park overlies a large part of the onshore basins.

Images: No data

Other media: No data

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This report was generated on Wednesday, November 26, 2014 10:27:25 AM EST.