Authors / CoAuthors
Abstract
The ISOTOPE database stores compiled age and isotopic data from a range of published and unpublished (GA and non-GA) sources. This internal database is only publicly accessible through the webservices given as links on this page. This data compilation includes sample and bibliographic links. 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. 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.
Product Type
dataset
eCat Id
131588
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Digital Object Identifier
Keywords
- theme.ANZRC Fields of Research.rdf
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- Isotope GeochemistryGeochronology
- ( {1} )
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- HVC_144624
- ( Project )
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- EFTF - Exploring For The Future
- ( Discipline )
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- Radiometric dating
- ( Discipline )
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- U-Pb dating
- ( Discipline )
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- Sm-Nd isotopes
- ( Discipline )
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- Samarium - neodymium isotopes
- ( Discipline )
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- Lu-Hf isotopes
- ( Discipline )
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- Lutetium - hafnium isotopes
- ( Discipline )
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- Pb-Pb isotopes
- ( Discipline )
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- Common Lead
- ( Theme )
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- Model age
- ( Discipline )
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- Oxygen isotopes
- ( Discipline )
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- Uranium - lead dating
- ( Project )
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- Exploring for the Future
- ( Project )
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- EFTF
- ( Discipline )
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- geochronology
- ( {1} )
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- Published_External
Publication Date
2021-05-03T05:09:15
Creation Date
Security Constraints
Legal Constraints
Status
underDevelopment
Purpose
Authoritative age and isotope information across Australia
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
Includes data compiled from GA's GEOCHRON database, from GA Records compiling U-Pb data (Anderson et al 2017, eCat 115184 and Jones et al 2018, eCat 123951), and will include the compiled data in Fraser et al: an Ar/Ar compilation for Northern Australia (in prep), the Champion, D.C., 2013. Neodymium depleted mantle model age map of Australia GA Record 2013/044, Huston lead isotope map Record (eCat 127263), and new data generated during the Exploring for the Future (EFTF) program
Parent Information
Extents
[-44, -9, 112, 154]
Reference System
GDA94 / Geoscience Australia Lambert (EPSG:3112)
Spatial Resolution
Variable and determined by the source information
Service Information
Associations
Association Type - operatedOnBy
Geochronology And Isotopes WFS
eCat Identifier - 134340,
UUID - 1bf10479-ef2d-4631-98d2-730ede9c92c7
Association Type - operatedOnBy
Geochronology And Isotopes WMS
eCat Identifier - 134341,
UUID - 8fd8a9e2-b5b0-4e7e-bd24-2e8aedac249d
Association Type - operatedOnBy
Geochronology And Isotopes WMTS
eCat Identifier - 145362,
UUID - 4a1d2745-029a-4fea-a2e0-75a0374667c9
Association Type - operatedOnBy
Geochronology And Isotopes WCS
eCat Identifier - 145363,
UUID - a44fc4d4-5711-4d40-aacf-35c745f1281a
Downloads and Links
Source Information