Abstract

New geophysical data acquired by Geoscience Australia during the Southwest Margins 2D seismic survey in 2008-09 has been used to interpret the tectonic and depositional history of the Mentelle Basin. The Mentelle Basin is a large, potentially prospective frontier basin located between the Yallingup Shelf and the Naturaliste Plateau. It comprises several shallow water depocentres (500-1500 m) in the east (eastern Mentelle Basin) and a large ultra deep-water depocentre (3000-3500 m) in the west (western Mentelle Basin). Interpretation of the new data revealed that initial rifting in the Mentelle Basin occurred in the Early Permian as part of the Perth Basin extensional system. This was followed by Late Permian to Early Jurassic thermal subsidence. Half-graben structures with Permo-Triassic fill have been mapped in the eastern Mentelle Basin. The main depositional phase in the western Mentelle Basin has been interpreted to correlate with Late Jurassic to Early Cretaceous extension in the Perth Basin and on the Southern Margin. New structural interpretation shows that in the northern part of the western Mentelle Basin, major structures are trending N-S similar to the Perth Basin, whereas in the south most structures are trending SW-NE, which is consistent with the orientation of the extensional basins on the Southern Margin. The proximity of the Southern Margin rift system not only affected the structure of the Mentelle Basin but also resulted in major fault reactivation, inversion and margin collapse in the Eocene corresponding to the onset of fast spreading in the Southern Ocean.
Google map showing geographic bounding box with values North bound -32.5 East bound 114.25 West bound 112.0 South bound -35.0
Related Links

Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2010-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

69855 Product http://www.ga.gov.au/metadata-gateway/metadata/record/69855/

Keywords

External Publication
Conference Paper
continental margins
sedimentary basins
AU-WA
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-32.5
East bound
114.25
West bound
112.0
South bound
-35.0

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

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

Source Description

Source data not available.

Metadata File Identifier

a05f7892-eee3-7506-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 SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Related Links