Australian National Radiogenic Isotope and Interpreted Ages Data Collection
Radiogenic isotopes decay at known rates and can be used to interpret ages for minerals, rocks and geologic processes. Different isotopic systems provide information related to different time periods and geologic processes, systems include: U-Pb and Ar/Ar, Sm-Nd, Pb-Pb, Lu-Hf, Rb-Sr and Re-Os isotopes. The GEOCHRON database stores full analytical U-Pb age data from Geoscience Australia's (GA) Sensitive High Resolution Ion Micro-Probe (SHRIMP) program. The ISOTOPE database is designed to expand GA's ability to deliver isotopic datasets, and stores compiled age and isotopic data from a range of published and unpublished (GA and non-GA) sources. OZCHRON is a depreciated predecessor to GEOCHRON and ISOTOPE, the information once available in OZCHRON is in the process of migration to the two current databases.
The ISOTOPE compilation includes sample and bibliographic links through the A, FGDM, and GEOREF databases. The data structure currently supports summary ages (e.g., U-Pb and Ar/Ar) through the INTERPRETED_AGES tables, as well as extended system-specific tables for Sm-Nd, Pb-Pb, Lu-Hf and O- isotopes. The data structure is designed to be extensible to adapt to evolving requirements for the storage of isotopic data. ISOTOPE and the data holdings were initially developed as part of the Exploring for the Future (EFTF) program - particularly to support the delivery of an Isotopic Atlas of Australia.
During development of ISOTOPE, some key considerations in compiling and storing diverse, multi-purpose isotopic datasets were developed:
1) Improved sample characterisation and bibliographic links. Often, the usefulness of an isotopic dataset is limited by the metadata available for the parent sample. Better harvesting of fundamental sample data (and better integration with related national datasets such as Australian Geological Provinces and the Australian Stratigraphic Units Database) simplifies the process of filtering an isotopic data compilation using spatial, geological and bibliographic criteria, as well as facilitating 'audits' targeting missing isotopic data.
2) Generalised, extensible structures for isotopic data. The need for system-specific tables for isotopic analyses does not preclude the development of generalised data-structures that reflect universal relationships. GA has modelled relational tables linking system-specific Sessions, Analyses, and interpreted data-Groups, which has proven adequate for all of the Isotopic Atlas layers developed thus far.
3) Dual delivery of 'derived' isotopic data. In some systems, it is critical to capture the published data (i.e. isotopic measurements and derived values, as presented by the original author) and generate an additional set of derived values from the same measurements, calculated using a single set of reference parameters (e.g. decay constant, depleted-mantle values, etc.) that permit 'normalised' portrayal of the data compilation-wide.
4) Flexibility in data delivery mode. In radiogenic isotope geochronology (e.g. U-Pb, Ar-Ar), careful compilation and attribution of 'interpreted ages' can meet the needs of much of the user-base, even without an explicit link to the constituent analyses. In contrast, isotope geochemistry (especially microbeam-based methods such as Lu-Hf via laser ablation) is usually focused on the individual measurements, without which interpreted 'sample-averages' have limited value. Data delivery should reflect key differences of this kind.
<b>Value: </b>Used to provide ages and isotope geochemistry data for minerals, rocks and geologic processes.
<b>Scope: </b>Australian jurisdictions and international collaborative programs involving Geoscience Australia
Simple
Identification info
- Date (Creation)
- 2021-01-07
- Date (Publication)
- 2022-04-01T01:10:10
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/144624
Identifier
- Codespace
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Digital Object Identifier
- Cited responsible party
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Role Organisation / Individual Name Details Author Commonwealth of Australia (Geoscience Australia)
Voice
- Purpose
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Used to provide ages and isotope geochemistry data for minerals, rocks and geologic processes.
- Status
- On going
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Waltenberg, K.
MEG Internal Contact
- Spatial representation type
Spatial resolution
- Level of detail
-
Variable and determined by the source information
- Topic category
-
- Geoscientific information
Extent
))
Temporal extent
- Time period
- 2017-01-01 2020-06-30
- Maintenance and update frequency
- Annually
Resource format
- Title
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Product data repository: Various Formats
- Protocol
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FILE:DATA-DIRECTORY
- Name of the resource
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Data Store directory containing the digital product files
- Description
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Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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Isotope Geochemistry
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Geochronology
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- {1}
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HVC_144624
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- {1}
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HVC - High Value Collection
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- {1}
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DC2020
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- {1}
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Isotopes
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- {1}
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Isotopic Age
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- {1}
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Isotope Measurements
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- {1}
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Isotope Ratios
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- {1}
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Geochemistry
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- {1}
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Radiometric Dating
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- {1}
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U-PB Dating
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- {1}
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Model Age
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- {1}
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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 facsimile
- OnLine resource
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View catalogue records associated with this collection
View catalogue records associated with this collection
- Distribution format
-
Resource lineage
- Statement
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<b>Source: </b>Published and unpublished (Geoscience Australia (GA) and non-GA) sources including analyses obtained in collaboration with the States and the Northern Territory under the National Geoscience Agreement<br />
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<b>Form: </b>Oracle database tables primarily held under the ISOTOPE and GEOCHRON schemas <br />
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This Collection record was created to enhance the discoverability and management of the individual products contained in the collection. See the individual eCat records for product specific lineage.
Reference System Information
- Reference system identifier
- EPSG/GDA94 / Geoscience Australia Lambert (EPSG:3112)
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/b76050fe-b3d4-4aa2-b5a4-d998f2ab490f
- Title
-
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 Point of contact Waltenberg, K.
MEG Internal Contact
Type of resource
- Resource scope
- Collection
- Name
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Geoscience Australia (GA) High Value Collection
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/144624
- Date info (Creation)
- 2021-01-06T21:06:17
- Date info (Revision)
- 2021-01-06T21:06:17
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