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...
Main Authors: | , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2011
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.763714 https://doi.pangaea.de/10.1594/PANGAEA.763714 |
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. ... : Supplement to: Kleinschmidt, Georg; Helferich, Stefan; Henjes-Kunst, Friedhelm; Jackson, Chris; Frimmel, Hartwig E (2000): The pre-Permo-Carboniferous rocks and structures from southern Kirwanveggen, Dronning Maud Land, Antarctica. Polarforschung, 66(3), 7-18 ... |
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