Geochemistry and ages of rock samples from Kirwanveggen, Antarctica

The basement of southern Kirwanveggen (western Dronning Maud Land) is formed by a SSW-dipping section consisting of (from SW to NE): migmatic gneisses; granitoid; low-grade/prograde meta-pelites, meta-psammites and meta-basalts (= "Polaris Formation"); ortho-gneiss; quartzite mylonite; Pol...

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Bibliographic Details
Main Authors: Kleinschmidt, Georg, Helferich, Stefan, Henjes-Kunst, Friedhelm, Jackson, Chris, Frimmel, Hartwig E
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Geological sample
GEOS
Kirwanveggen
Dronning Maud Land
Antarctica
Shackleton
Shackleton Range
Sor-Rondane
Urfjell
Antarc*
Polarforschung
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.763714
https://doi.org/10.1594/PANGAEA.763714
Description
Summary:The basement of southern Kirwanveggen (western Dronning Maud Land) is formed by a SSW-dipping section consisting of (from SW to NE): migmatic gneisses; granitoid; low-grade/prograde meta-pelites, meta-psammites and meta-basalts (= "Polaris Formation"); ortho-gneiss; quartzite mylonite; Polaris Formation; quartzite mylonite; meta-turbidites. These units are (partly) separated by at least four SSW-dipping, NE to N directed major thrusts. Most probably, this thrust system is of Pan-African age. Towards north, the section is followed by the molasse-like Urfjell Group, deposited later than approx. 550 Ma and earlier than 450 Ma. Similarities with the Pan-African of the Shackleton Range (thrusting, molasse) led to the assumption, that the East/West Gondwana suture runs from the Shackleton Range towards Sor Rondane (eastern Dronning Maud Land) passing southern Kirwanveggen at its south-east.

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