Citation

Geoscience Australia provides most of its products for free under a Creative Commons Attribution 3.0 Australia Licence. We only require that you reference the use of our data or information using the following citation:
Exon, N.F. & Stagg, H.M.J., 1981. Geology of the Scott Plateau and Rowley Terrace, off northwestern Australia. Bulletin  213. Bureau of Mineral Resources, Geology and Geophysics, Canberra.

Abstract

The Scott Plateau and the adjacent Rowley Terrace occupy an area of about 160 000 km2 in water depths ranging from 300 to 3500 m off Australia's Northwest Shelf. The Scott Plateau forms a subsided western margin to the Browse Basin. For much of the time between the Permian and Late Jurassic, the plateau was probably higher than the adjoining basins, shedding sediment into the Browse Basin to the east and the Rowley Sub-basin to the south. Since break-up of the continental margin in the Callovian, the plateau has gradually subsided to its present depth of 1000-3500 m, and is now covered by a blanket of Upper Cretaceous and Cainozoic sediments, mainly carbonates, averaging 1 km in thickness. Seismic, magnetic, and gravity data indicate that, over most of the plateau, basement of possible Kimberley Block equivalents is probably no more than 2 to 4 km below the seabed. The southern part of the Scott Plateau and the Rowley Terrace are underlain by the Rowley Sub-basin. The Rowley Sub-basin is a pull-apart basin that trends east-northeast and contains largely Mesozoic sediments; it differs from other pull-apart basins of the Northwest Shelf because it is only mildly deformed. The basin probably contains at least 6 km of prebreak- up Mesozoic and Palaeozoic rocks, overlain by a post-break-up sequence that has an average thickness of 1.5 to 2 km, thinning to zero at the top of the continental slope. The hydrocarbon potential of the Scott Plateau appears to be only fair. The highest potential appears to be in the Scott Plateau Saddle, which may have suitable source, reservoir, and cap rocks, and structural and stratigraphic traps. Over much of the plateau, the potential hydrocarbon-bearing rocks are probably no younger than Palaeozoic, and are unlikely to be more than 2 to 4 km thick; any hydrocarbons generated in them would probably have been lost during the prolonged emergence and erosion that preceded break-up. The hydrocarbon potential of the Rowley Sub-basin cannot be regarded as high. The thickness of the sediments in the sub-basin is adequate for hydrocarbons to be generated, but drilling at East Mermaid No. 1 indicated a possible lack of suitable source rocks. In addition, the lack of structure in all but the deeper parts of the sub-basin must downgrade prospects.
Google map showing geographic bounding box with values North bound -12.0 East bound 124.0 West bound 117.0 South bound -18.0
Downloads
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Product Type/Sub Type

dataset - GA Publication - Bulletin

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1981

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Bulletin
geology
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-12.0
East bound
124.0
West bound
117.0
South bound
-18.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-fd9d-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2014-02-14

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).