Product catalogue
Lord Howe Rise, Tasman Sea - preliminary geophysical results and petroleum prospects
The Lord Howe Rise is a major submarine feature in the Tasman Sea; it extends northwest from the New Zealand continental margin and lies about 600 to 1200 km off the east coast of Australia. It is about 2000 km long and 300 km wide, and most of its crest lies in water ranging from 750 to 1200 m deep. It has a continental crustal structure. The general absence of rift-valley or pull-apart basins along the eastern seaboard of Australia has led some authors to speculate that when breakup took place in the Tasman Basin, the rift-valley was breached along its western boundary fault, and is now represented by a zone of horst and graben structures some 200 km in width underlying the western part of the Lord Howe Rise and possibly the Dampier Ridge. Any sedimentary basins associated with rifting would have remained wholly attached to the Lord Howe Plate. Although survey data from the R.V. Sonne cruise show that sediment-filled basins, some of which are grabens, make up much of western Lord Howe Rise, the degree to which they are related to the pre-Tasman Basin rifting remains conjectural. The basins on Lord Howe Rise are 20-40 km wide; some contain up to 4000 m of sediment. Sediments are also relatively thick on the eastern flank of the Middleton and Lord Howe Basins. The seismic profiles indicate that wave-base erosion was taking place on Lord Howe Rise in the Late Cretaceous, and imply that a shallow marine environment was present prior to seafloor spreading in the Tasman Basin. Shallow marine silts and clays penetrated in DSDP Site 207, and palaeogeographical reconstructions, which juxtapose central Lord Howe Rise and the Gippsland Basin, indicate that both marine and non-marine petroleum source rocks may be present. Petroleum traps appear to exist against the boundary faults of the grabens, as internal structures within basins, and in structures interpreted as reefs of Late Cretaceous and Paleocene age. A seal may be provided by pelagic oozes. The eastern flank of Lord Howe Rise was probably the ancient (pre-Maestrichtian) continental margin of the Australian-Antarctic supercontinent. A wedge of Late Cretaceous or older sediment, up to 2000 m thick, which was deposited across the margin, may also be prospective. The presence of potential source rocks, suitable traps, and indications of higher than normal heat flow, suggest that this deep water area, which is now just within range of oil drilling technology, should be considered prospective for petroleum at least in the long term.
Simple
Identification info
- Date (Publication)
- 1980-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/81045
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Bureau of Mineral Resources, Geology and Geophysics
Canberra Author Willcox, J.B.
1 Author Symonds, P.A.
2 Author Hinz, K.
3 Author Bennett, D.
4
- Name
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BMR Journal of Australian Geology and Geophysics
- Issue identification
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5:3:225-236
- Point of contact
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Role Organisation / Individual Name Details Custodian Corp
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
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- Geoscientific information
Extent
))
- Maintenance and update frequency
- Unknown
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
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GA Publication
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Journal
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- Keywords
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NSW
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QLD
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Earth Sciences
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Journal article (pdf)
Journal article (pdf)
- Distribution format
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pdf
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Resource lineage
- Statement
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Unknown
- Hierarchy level
- Non geographic dataset
- Other
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GA Publication
- Description
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Source data not available.
Metadata constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
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urn:uuid/fae9173a-6ff2-71e4-e044-00144fdd4fa6
- Title
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GeoNetwork UUID
- Language
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- Character encoding
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- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Document
- Name
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AGSO BMR Journal
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/81045
- Date info (Revision)
- 2018-04-20T06:10:11
- Date info (Creation)
- 2014-06-03T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551