Next Article in Journal
A Calorimetric and Thermodynamic Investigation of the Synthetic Analogue of Mandarinoite, Fe2(SeO3)3·5H2O
Previous Article in Journal
Hydrological Hazard: Analysis and Prevention
Previous Article in Special Issue
Numerical Modeling of Flow Patterns Applied to Analysis of Susceptibility to Movements of the Ground
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Geosciences 2018, 8(11), 390; https://doi.org/10.3390/geosciences8110390

Tectono-Thermal Evolution and Morphodynamics of the Central Dronning Maud Land Mountains, East Antarctica, Based on New Thermochronological Data

1
Department of Earth Science, University of Bergen, P.O. Box 7803, 5020 Bergen, Norway
2
Geoscience Centre, University of Göttingen, Goldschmidtstraβe 3, 37077 Göttingen, Germany
3
Bundesanstalt für Geowissenschaften u. Rohstoffe, Stilleweg 2, 30655 Hannover, Germany
Present Address: Geological Survey of Norway, P.O. Box 6315 Torgarden, 7491 Trondheim, Norway.
*
Author to whom correspondence should be addressed.
Received: 30 August 2018 / Revised: 26 September 2018 / Accepted: 19 October 2018 / Published: 26 October 2018
(This article belongs to the Special Issue Tectonics and Morphodynamics)
Full-Text   |   PDF [4593 KB, uploaded 26 October 2018]   |  

Abstract

The lack of preserved Mesozoic–Cenozoic sediments and structures in central Dronning Maud Land has so far limited our understanding of the post-Pan-African evolution of this important part of East Antarctica. In order to investigate the thermal evolution of the basement rocks and place constraints on landscape evolution, we present new low-temperature thermochronological data from 34 samples. Apatite fission track ages range from 280–85 Ma, while single-grain (U-Th)/He ages from apatite and zircon range from 305–15 and 420–340 Ma, respectively. Our preferred thermal history models suggest late Paleozoic–early Mesozoic peneplanation and subsequent burial by 3–6 km of Beacon sediments. The samples experienced no additional burial in the Jurassic, thus the once voluminous continental flood basalts of western Dronning Maud Land did not reach central Dronning Maud Land. Mesozoic–early Cenozoic cooling of the samples was slow. Contrary to western Dronning Maud Land, central Dronning Maud Land lacks a mid-Cretaceous cooling phase. We therefore suggest that the mid-Cretaceous cooling of western Dronning Maud Land should be attributed to the proximity to the collapse of the orogenic plateau at the Panthalassic margin of Gondwana. Cooling rates accelerated considerably with the onset of glaciation at 34 Ma, due to climate deterioration and glacial denudation of up to 2 km. View Full-Text
Keywords: apatite fission track; (U-Th)/He; low-temperature thermochronology; thermal modelling; passive margin; Gondwana rifting apatite fission track; (U-Th)/He; low-temperature thermochronology; thermal modelling; passive margin; Gondwana rifting
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Sirevaag, H.; Ksienzyk, A.K.; Jacobs, J.; Dunkl, I.; Läufer, A. Tectono-Thermal Evolution and Morphodynamics of the Central Dronning Maud Land Mountains, East Antarctica, Based on New Thermochronological Data. Geosciences 2018, 8, 390.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Geosciences EISSN 2076-3263 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top