Product catalogue
Spatial variations in lead isotopes, Tasman Element, eastern Australia
Lead isotope data from ore deposits and mineral occurrences in the Tasman Element of eastern Australia have been used to construct isotopic maps of this region. These maps exhibit systematic patterns in parameters derived from isotope ratios. The parameters include μ (238U/204Pb), as calculated using the Cumming and Richards (1975) lead evolution model, and the difference between true age of mineralisation and the Cumming and Richards lead isotope model age of mineralisation (Δt).
Variations in μ coincide with boundaries at the orogen, subprovince and zone scales. The boundary between the Lachlan and New England orogens is accompanied by a decrease in μ, and within the Lachlan Orogen, the Central Subprovince is characterised by μ that is significantly higher than in the adjacent Eastern and Western subprovinces. Within the Eastern Subprovince, the Cu-Au-rich Macquarie Arc is characterised by significantly lower μ relative to adjacent rocks.
The Macquarie Arc is also characterised by very high Δt (generally above 200 Myr). Other regions characterised by very high Δt include western Tasmania, the southeastern New England Orogen, and the Hodgkinson Province in northern Queensland. These anomalies are within a broad pattern of decreasing Δt from east to west, with Paleozoic deposits within or adjacent to Proterozoic crust characterised by Δt values of 50 Myr or below.
The patterns in Δt are interpreted to reflect the presence of the two major tectonic components involved in the Paleozoic Tasman margin in Australia (cf., Münker, 2000): subducting proto-Pacific crust (Δt >150 Myr), and Proterozoic Australia crust (Δt < 50 Myr) on the over-riding plate. Proterozoic Australia crustal sources are interpreted to dominate the western parts of the Tasman Element and Proterozoic crust further to the west, whereas Pacific crustal sources are inferred to characterise western Tasmania and much of the eastern part of the Tasman Element. Contrasts in Δt between the Cambrian Mount Read Volcanics in western Tasmania and similar aged rocks in western Victoria and New South Wales make direct tectonic correlation between these rocks problematic.
Simple
Identification info
- Date (Creation)
- 2017-05-01T11:00:00
- Date (Publication)
- 2017-05-17T11:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/110383
- Citation identifier
- Digital Object Identifier/http://dx.doi.org/10.11636/Record.2017.009
- Cited responsible party
-
Role Organisation / Individual Name Details Author Huston, D.L.
Co-author Champion D. C.
Co-author Morrison, G.
Co-author Maas, R.
Co-author Thorne, J.P.
Co-author Carr, G.
Co-author Beams, S.
Co-author Bottrill, R.
Co-author Chang, Z.
Co-author Dhnaram, C.
Co-author Downes, P.M.
Co-author Forster, D.B.
Co-author Gemmell, J.B.
Co-author Lisitsin, V.A.
Co-author McNeill, A.
Co-author Vickery, M.
- Name
-
Record
- Issue identification
-
2017/009
- Purpose
-
To map variations in lead isotopes in eastern Australia
- Status
- Point of contact
-
Role Organisation / Individual Name Details Author Huston, D.L.
Commonwealth of Australia (Geoscience Australia)
Voice
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
-
Product data repository: Various Formats
- Website
-
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
- Australian and New Zealand Standard Research Classification: Fields of Research
-
-
Earth Sciences
-
- Keywords
-
-
lead isotopes
-
- Keywords
-
-
metallogeneis
-
- Keywords
-
-
tectonics
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
-
Download the Record (docx)
Download the Record (docx)
- Distribution format
-
-
docx
-
- OnLine resource
-
Download the Record (pdf)
Download the Record (pdf)
- Distribution format
-
-
pdf
-
- OnLine resource
-
Download Appendix B (xlsx)
Download Appendix B (xlsx)
- Distribution format
-
-
xlsx
-
Resource lineage
- Statement
-
Product is an interpretation of ore lead isotope produced over the last four decades, mainly by CSIRO with additional information from other universities and collected as part of the study
- Hierarchy level
- Product
Metadata constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/65ddd1a1-c36f-4175-96ef-a5bbccf333bc
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Huston, D.L.
Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Document
- Name
-
Geoscience Australia Record
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/110383
- Date info (Creation)
- 2017-04-03T05:23:14
- Date info (Revision)
- 2018-04-22T08:20:53
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551