Product catalogue
Regional variation of gravity, and isostatic equilibrium if the Australian crust
In eastern Australia free-air anomalies and altitudes averaged over 1° x 1° areas show a positive correlation of +0.059 ± .004 mGal. m^-1. lsostatic compensation of topography and crustal masses is thought to be mainly at the base of the crust, but partly deeper in the mantle, and to be almost complete for 1° x 1° areas. In central and western Australia free-air anomalies and altitudes have a zero or slightly negative correlation with a larger scatter; isostatic compensation is thought to be complete only for 3° x 3° areas and to be predominantly at the base of the crust. The deeper compensation in eastern Australia is thought to be related in some way to the youth of the crust and the presence of a low velocity zone at about 130 km. Elsewhere in the world Phanerozoic areas have a positive free-air anomaly altitude correlation, and Precambrian areas a negative correlation; so the different modes of isostatic compensation found in Australia may apply to crust of similar age elsewhere in the world. In Australia the residual 1° x 1° area anomalies found by removing altitude, long wavelength and sedimentary effects generally have an amplitude of 30 mGal and a wavelength of 6°; they are thought to be due to isostatically compensated variations in crustal density. Using these anomalies, variations in crustal thickness are predicted.
Simple
Identification info
- Date (Publication)
- 1976-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/80895
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Bureau of Mineral Resources, Geology and Geophysics
Canberra Author Wellman, P.
1
- Name
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BMR Journal of Australian Geology and Geophysics
- Issue identification
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1:4:297-302
- 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
- Keywords
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GA Publication
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Journal
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- Keywords
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AUS
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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
-
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
- Distributor contact
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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
- Metadata identifier
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urn:uuid/fae9173a-6f5c-71e4-e044-00144fdd4fa6
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- 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
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/80895
- Date info (Revision)
- 2018-04-20T06:08:43
- 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
- Title
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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