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Mesozoic Alkaline and related igneous rocks of Australia  


Authors / CoAuthors

Champion, D.C. | Highet, L. | Buddee, M.

Abstract

Alkaline and related rocks are a relatively rare class of igneous rocks worldwide. Alkaline rocks encompass a wide range of rock types and are mineralogically and geochemically diverse. They are typically though to have been derived by generally small to very small degrees of partial melting of a wide range of mantle compositions. As such these rocks have the potential to convey considerable information on the evolution of the Earth’s mantle (asthenosphere and lithosphere), particularly the role of metasomatism which may have been important in their generation or to which such rocks may themselves have contributed. Such rocks, by their unique compositions and or enriched source protoliths, also have considerable metallogenic potential, e.g., diamonds, Th, U, Zr, Hf, Nb, Ta, REEs. It is evident that the geographic occurrences of many of these rock types are also important, and may relate to presence of old cratons, craton margins or major lithospheric breaks. Finally, many alkaline rocks also carry with them mantle xenoliths providing a snapshot of the lithospheric mantle composition at the time of their emplacement. Accordingly, although alkaline and related rocks comprise only a volumetrically minor component of the geology of Australia, they are of considerable importance to studies of lithospheric composition, evolution and architecture and to helping constrain the temporal evolution of the lithosphere, as well as more directly to metallogenesis and mineralisation.

Product Type

document

eCat Id

146949

Contact for the resource

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

  Point of contact

 
Contact instructions
MEG

  Resource provider

 

Digital Object Identifier

http://dx.doi.org/10.11636/Record.2022.038

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
  • Australia
  • Alkaline rocks
  • Igneous rocks
  • EFTF
  • Exploring for the future
  • Published_External
( Project )
  • Australia’s Resources Framework

Publication Date

2022-11-11T04:24:44

Creation Date

2022-06-20T09:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

This report documents alkaline and related rocks of Mesozoic age, and is part of an ongoing compilation of the distribution and geology of alkaline and related rocks throughout Australia.

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Record RECORD: 2022/038

Lineage

This report and accompanying GIS document alkaline and related rocks of Mesozoic age, and is part of an ongoing compilation of the distribution and geology of alkaline and related rocks throughout Australia.

Parent Information

Extents

[-44.00, -9.00, 112.00, 154.00]

Reference System

Spatial Resolution

Service Information

Associations

Association Type - dependency

Mesozoic Alkaline and related igneous rocks of Australia MapServer    

eCat Identifier - 146951,

UUID - d83b70c7-6ef4-4449-aa0f-a8abb1388058

Association Type - dependency

Mesozoic Alkaline and related igneous rocks of Australia WMS    

eCat Identifier - 146952,

UUID - e26cd010-2164-40a9-ab86-2acb25414633

Association Type - dependency

Mesozoic Alkaline and related igneous rocks of Australia WFS    

eCat Identifier - 146953,

UUID - e63b4771-cd18-4241-94b0-4e87708b4694

Downloads and Links

Download the Record (pdf) [3.0 MB]  

Source Information



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