Spatial variation in the stratigraphic architecture of the Fort Cooper and equivalent coal measures, Bowen Basin, Queensland

Ayaz, S. A., Esterle, J. S. and Martin, M. A. (2015) Spatial variation in the stratigraphic architecture of the Fort Cooper and equivalent coal measures, Bowen Basin, Queensland. Australian Journal of Earth Sciences, 62 5: 547-562. doi:10.1080/08120099.2015.1062422

Author Ayaz, S. A.
Esterle, J. S.
Martin, M. A.
Title Spatial variation in the stratigraphic architecture of the Fort Cooper and equivalent coal measures, Bowen Basin, Queensland
Journal name Australian Journal of Earth Sciences   Check publisher's open access policy
ISSN 1440-0952
Publication date 2015-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1080/08120099.2015.1062422
Open Access Status Not yet assessed
Volume 62
Issue 5
Start page 547
End page 562
Total pages 16
Place of publication Abingdon, Oxfordshire United Kingdom
Publisher Taylor & Francis
Language eng
Abstract The major stratigraphic units of the Fort Cooper Coal Measures (FCCM) have been reviewed, and an internal coal seam architecture using 500 wireline logs in the Bowen Basin, southeast Queensland has been developed. The subdivisions of the coal measures include the Burngrove Formation, Middle Main Seam and Fair Hill Formation in the northern Bowen Basin. To the south of the basin, the Middle Main Seam is interpreted as the stratigraphic equivalent of Black Alley Shale Formation. The Yarrabee Tuff forms the top boundary of the coal measures and is distributed basin-wide except over the southern Denison and southern Taroom troughs. Accessory tuffs beneath the Yarrabee Tuff aided seam level correlation. The geometries of coal seams have been analysed for each morphotectonic zone of the Bowen Basin using gravity data, which highlight high and low topographic sites. The Collinsville Shelf in northwest of the Bowen Basin comprises thick and merged Burngrove and Fair Hill formation coals that split towards northeast in the Nebo Synclinorium and southeast in Taroom Trough. Coal seams split into daughter seams from north to south and are named as first, second or third order, based on the number of splits that occurred. First- and second-order splitting occurs at the boundary of the Nebo Synclinorium and Collinsville Shelf, at the Narrows of Nebo Synclinorium and Comet Ridge. Further, third- and fourth-order splitting occurs at the boundary of the Comet Ridge and Taroom Trough. Splitting zones found at the junction of morphotectonic zones are related to a change in subsidence. In addition, the association of split seams with coarse grain-dominated interburden reflects increased accommodation in low-lying areas such as the Nebo Synclinorium and the troughs. Thick and coalesced coal seams are associated with shelves and ridges of the basin reflecting low accommodation sites. Hence, the variation in the coal seam architecture of FCCM responds to the subsidence associated with different morphotectonic zones of the basin.
Keyword Bowen Basin
Fort Cooper Coal Measures
Morphotectonic zone
Burngrove Formation
Fair Hill Formation
Yarrabee Tuff
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Papers
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