Geology of the Larsemann Hills, Princess Elizabeth Land, Antarctica

The Larsemann Hills region is dominated by two major lithological associations, a Mesoproterozoic to Neoproterozoic felsic dominated orthogneiss complex (Søstrene Orthogneiss) which occurs as basement to a sequence of pelitic, psammitic and felsic paragneisses (Brattstrand Paragneiss) and felsic intrusives. Recent unpublished data suggest a late Neoproterozoic depositional age for the Brattstrand Paragneiss. Current geochronology indicates that the region experienced medium to low pressure granulite-facies metamorphism during the Early Palaeozoic (~515-530 Ma). Although the paragneiss sequences record no evidence of earlier metamorphism, relics of a previous metamorphic event at ~1000-950 Ma are preserved in the Søstrene Orthogneiss. Within the Larsemann Hills region, the Early Palaeozoic event is characterised by peak metamorphism of ~7 kbar at ~800-850°C, with the post-peak evolution characterised by decompression, with some cooling, to 4 kbars at 750°C, then to 2-3 kbar at 600-650°C during final stages of orogenesis, with exhumation largely driven by crustal extension. Tectonic models generally argue for a continental-continental collisional scenario, with thermal input derived from a thinned mantle lithosphere.

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Identification info

Date (Creation)
2019-01-31T00:00:00
Date (Publication)
2019-01-31T04:13:55
Date (Revision)
2019-04-09T01:08:51
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/126688

Cited responsible party
Role Organisation / Individual Name Details
Author

Carson, C.J.
Author

Grew, E.S.
Author

Thost, D.E.
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Edition 1

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Final
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Commonwealth of Australia (Geoscience Australia)

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Place and Communities Division

 External Contact
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McLennan, S.

 Place and Communities Internal Contact
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1:25000

Topic category
  • Geoscientific information

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Temporal extent

Time period
2004-07-01

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N
S
E
W


Maintenance and update frequency
Not planned

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Product data repository: Various Formats

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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

Keywords

  • Geology

Product

  • map

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

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4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
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License

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Title

Australian Government Security ClassificationSystem

Edition date
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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OnLine resource

Download the map (pdf)

Download the map (pdf)

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  • pdf

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Not supplied

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Document

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CRS/WGS84 (CRS:84)

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/71d89276-1c1e-4cdf-ae47-551aecf1bbf4

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

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Point of contact

McLennan, S.

 Place and Communities Internal Contact

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Document
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GA Publication: Map

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

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Citation identifier
eCatId/126688

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/71d89276-1c1e-4cdf-ae47-551aecf1bbf4

Date info (Creation)
2018-05-04T03:37:56
Date info (Revision)
2018-05-04T03:38:12

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Edition date
2015-07-01T00:00:00
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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N
S
E
W


Keywords

map

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