The Kuunga Accretionary Complex of Sverdrupfjella and Gjelsvikfjella, western Dronning Maud Land, Antarctica

The ∼ 550 Ma Kuunga Orogeny extends from the Damara in Namibia, through the Zambesi and Lurio orogenic belts in Zambia and Mozambique, southern Africa, through Dronning Maud Land and Princess Elizabeth Land, Antarctica into western Australia. Sverdrupfjella is located at the western end of Dronning...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Mineralogical and Petrological Sciences 2023, Vol.118(ANTARCTICA), pp.230125
Main Authors: GRANTHAM, Geoffrey H., SATISH-KUMAR, M., HORIE, Kenji, UECKERMANN, Henriette
Format: Article
Language:English
Subjects:
Geochronology
Gjelsvikfjella
Kuunga orogeny
Structural geology
Sverdrupfjella
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The ∼ 550 Ma Kuunga Orogeny extends from the Damara in Namibia, through the Zambesi and Lurio orogenic belts in Zambia and Mozambique, southern Africa, through Dronning Maud Land and Princess Elizabeth Land, Antarctica into western Australia. Sverdrupfjella is located at the western end of Dronning Maud Land where the Kuunga Orogeny is inferred to post-date and overprint the East African Orogeny.Three complexes are recognized in Sverdrupfjella western Dronning Maud Land, Antarctica. A western basal ∼ 1140 Ma Jutulrora Complex, consisting mostly of arc-related tonalitic trondjhemitic orthogneiss with evolved Sr-Nd isotopic signatures with TDm ages >2 Ga. It is structurally overlain by the Fuglefjellet Complex, comprising supracrustal ∼ 800-900 Ma carbonates intercalated with quartzo-feldspathic gneisses with detrital zircons of ∼ 1000-1200 Ma age with ∼ 500 Ma overgrowths. The Fuglefjellet Complex is overlain in the east by the Rootshorga Complex containing paragneisses with minor orthogneisses (∼ 1100-1200 Ma), intruded by granitic orthogneiss of similar age. Strontium-Nd isotopic signatures from the Rootshorga Complex has TDm ages
ISSN:1345-6296
1349-3825
DOI:10.2465/jmps.230125