Granitoids of northeastern Tasmania

The granitoids of northeastern Tasmania comprise the composite Scottsdale, Blue Tier, and Eddystone batholiths, and intrude the folded Ordovician to Lower Devonian Mathinna beds, which consist of interbedded quartzwacke, siltstone, and slate, regionally metamorphosed to low grade. The granitoids were intruded in the Devonian, having K-Ar ages ranging between 395 and 368 Ma. They post-date the regional folding of the country rocks, which is correlated with the Tabberabberan deformation of eastern Australia. Emplacement was at a high level, with narrow metamorphic aureoles, and the granitoids are associated with a small amount of volcanics. The granitoids fall into four types: granodiorite, biotite adamellite, biotite-garnet adamellite, and alkali-feldspar granite. The last type is strongly metasomatised and associated with tin mineralisation. Field relations indicate that, generally, the granodiorite plutons are the oldest and the alkali-feldspar granite plutons the youngest. The granitoids have been derived from partial melting of both igneous and sedimentary source rocks. Unequivocal S-type granites are reStricted to the Eddystone batholith. Minor crystal fractionation or restite unmixing occurred within plutons. The alkali-feldspar granites were derived from adamellite magma by crystal fractionation.

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Date (Publication)
1984-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/81193

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Role Organisation / Individual Name Details
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Bureau of Mineral Resources, Geology and Geophysics

 Canberra
Author

McClenaghan, M.P.

 1
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BMR Journal of Australian Geology and Geophysics

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9:4:303-312

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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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  • Journal

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Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

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  • Published_External

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Creative Commons Attribution 4.0 International Licence

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CC-BY

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4.0

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http://creativecommons.org/licenses/

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License

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2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

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Unclassified
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English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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Journal article (pdf)

Journal article (pdf)

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Non geographic dataset
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Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

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urn:uuid/fae9173a-7086-71e4-e044-00144fdd4fa6

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Language
English
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UTF8
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Commonwealth of Australia (Geoscience Australia)

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Document
Name

AGSO BMR Journal

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Geoscience Australia - short identifier for metadata record with

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eCatId/81193

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/fae9173a-7086-71e4-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:08:22
Date info (Creation)
2014-06-03T00:00:00

Metadata standard

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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

 
 

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