Topography, structural and exhumation history of the Admiralty Mountains region, northern Victoria Land, Antarctica

Balestrieri, Maria Laura; Olivetti, Valerio; Rossetti, Federico; Gautheron, Cécile; Cattò, Silvia; Zattin, Massımılıano

doi:10.1016/j.gsf.2020.01.018

Cited by 6 publications

(4 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the neighbouring Wilkes Basin, Maritati et al (unpublished data 2019) report some zircon and apatite U-Th/He age T-t modelling consistent with a slightly later erosion compatible with rifting in the Permian-Triassic (280-220 Ma). Apart from the Cenozoic ages obtained along the Transantarctic Mountains, which suggests a zone of mantle upwelling (Balestrieri et al 2020), similarly old AFT ages ranging from 350 to 250 Ma were obtained in the Miller Range of the Transantarctic Mountains, in the Lambert Glacier area (see review in Rolland et al 2019). These data are in agreement with little erosion and tectonic denudation since Permian times and through Mesozoic and Cenozoic times, and thus are suggestive of mostly inefficient glacial erosion since the establishment of the polar ice sheet.…”

Section: Geological Setting: Erosion and Past Geological History In Ementioning

confidence: 90%

Antarctic erosion history reconstructed by Terre Adélie moraine geochronology

et al. 2020

View full text Add to dashboard Cite

Abstract We report apatite fission-track and 10Be terrestrial cosmogenic nuclide (TCN) dating of 14 moraine boulders originating from inland Terre Adélie, East Antarctica. These data show cooling of the Proterozoic Terre Adélie craton at < ~120°C between 350 and 300 Ma, suggesting > 4 km temperate glacial erosion during the Late Palaeozoic Ice Age, followed by nearly null Mesozoic erosion and low glacial erosion (< 2 km) in the Cenozoic. Based on glacial flux maps, the origin of the boulders may be located ~400 km upstream. Preliminary TCN (10Be) datings of moraine boulders cluster within the last 30 ka. Cosmogenic ages from the Lacroix Nunatak suggest a main deglaciation after the Younger Dryas at c. 10 ka, while those of Cap Prud'homme mostly cluster at 0.6 ka, in agreement with an exhumation of boulders during the Little Ice Age.

show abstract

Section: Geological Setting: Erosion and Past Geological History In Ementioning

confidence: 90%

Antarctic erosion history reconstructed by Terre Adélie moraine geochronology

et al. 2020

View full text Add to dashboard Cite

show abstract

“…These ages occur commonly in the Transantarctic Mountains but rarely in West Antarctica (Fig. 4) (6,8,14,22,(49)(50)(51)(52)(53)(54)(55)(56)(57)(58)(59)(60)(61)(62). A Transantarctic Mountain provenance is also indicated by the occurrence of lithic arkose pebbles in the sandstone (fig.…”

Section: Early Volcanism and A >1500km-long Transcontinental West Ant...mentioning

confidence: 99%

A large-scale transcontinental river system crossed West Antarctica during the Eocene

Zundel,

Spiegel,

Mark

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

Extensive ice coverage largely prevents investigations of Antarctica’s unglaciated past. Knowledge about environmental and tectonic development before large-scale glaciation, however, is important for understanding the transition into the modern icehouse world. We report geochronological and sedimentological data from a drill core from the Amundsen Sea shelf, providing insights into tectonic and topographic conditions during the Eocene (~44 to 34 million years ago), shortly before major ice sheet buildup. Our findings reveal the Eocene as a transition period from >40 million years of relative tectonic quiescence toward reactivation of the West Antarctic Rift System, coinciding with incipient volcanism, rise of the Transantarctic Mountains, and renewed sedimentation under temperate climate conditions. The recovered sediments were deposited in a coastal-estuarine swamp environment at the outlet of a >1500-km-long transcontinental river system, draining from the rising Transantarctic Mountains into the Amundsen Sea. Much of West Antarctica hence lied above sea level, but low topographic relief combined with low elevation inhibited widespread ice sheet formation.

show abstract

“…There is a large body of low-temperature thermochronology data from the TAM that we can compare to the new data from interior East Antarctica 26,32,[35][36][37][38][39][40][41][42][43][44][45][46][47][48] . The TAM are rift-flank mountains adjacent to the West Antarctic rift system, reaching elevations exceeding 4000 m, but overall the geology of these mountains is relatively straightforward 30,49 .…”

Section: Comparison With Low-temperature Thermochronology From the Tammentioning

confidence: 99%

Exhumation and tectonic history of inaccessible subglacial interior East Antarctica from thermochronology on glacial erratics

Fitzgerald

Goodge

2022

Nat Commun

View full text Add to dashboard Cite

The geology, tectonic history and landscape evolution of ice-covered East Antarctica are the least known of any continent. Lithic boulders eroded from the continental interior and deposited in glacial moraines flanking the Transantarctic Mountains provide rare constraints on the geological history of central interior East Antarctica. Crystallization ages and ice velocities indicate these glacial erratics are not sourced locally from the Transantarctic Mountains but rather originate from the continental interior, possibly as far inland as the enigmatic Gamburtsev Subglacial Mountains. We apply low-temperature thermochronology to these boulders, including multi-kinetic inverse thermal modeling, to constrain a multi-stage episodic exhumation history. Cambro-Ordovician and Jurassic rapid-cooling episodes correlate with significant exhumation events accompanying Pan-African convergence and Gondwanan supercontinent rifting, respectively. Here we show that while Cretaceous rapid cooling overlaps temporally with Transantarctic Mountains formation, a lack of discrete younger rapid-cooling pulses precludes significant Cenozoic tectonic or glacial exhumation of central interior East Antarctica.

show abstract

Topography, structural and exhumation history of the Admiralty Mountains region, northern Victoria Land, Antarctica

Cited by 6 publications

References 81 publications

Antarctic erosion history reconstructed by Terre Adélie moraine geochronology

Antarctic erosion history reconstructed by Terre Adélie moraine geochronology

A large-scale transcontinental river system crossed West Antarctica during the Eocene

Exhumation and tectonic history of inaccessible subglacial interior East Antarctica from thermochronology on glacial erratics

Contact Info

Product

Resources

About