Show simple item record

dc.contributor.authorSirevaag, Hallgeir
dc.contributor.authorKsienzyk, Anna Katharina
dc.contributor.authorJacobs, Joachim
dc.contributor.authorDunkl, István
dc.contributor.authorLäufer, Andreas
dc.PublishedSirevaag H, Ksienzyk AK, 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(11):390eng
dc.description.abstractThe 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.en_US
dc.rightsAttribution CC BYeng
dc.subjectapatite fission trackeng
dc.subjectlow-temperature thermochronologyeng
dc.subjectthermal modellingeng
dc.subjectpassive margineng
dc.subjectGondwana riftingeng
dc.titleTectono-thermal evolution and morphodynamics of the central dronning maud land mountains, east antarctica, based on new thermochronological dataen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2018 The Author(s)en_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution CC BY
Except where otherwise noted, this item's license is described as Attribution CC BY