Variability in uplift, exhumation and crustal deformation along the Transantarctic Mountains front in southern Victoria Land, Antarctica

Olivetti, Valerio; Rossetti, Federico; Balestrieri, Maria Laura; Pace, Donato; Cornamusini, Gianluca; Talarico, F.

doi:10.1016/j.tecto.2018.08.017

Cited by 13 publications

(17 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A volcanic origin might be possible for ages between 20 and 30 Ma, given that some volcanic apatites with a U–Pb age of about 30 Ma have been detected in AND‐2A (Zattin et al., ) although the location of the volcanic source is unknown. However, these apatites could also derive from exhumed basement rocks because similar ages have been found in the Skelton Glacier (Olivetti et al., ; Zattin, Pace, Andreucci, Rossetti, & Talarico, ).…”

Section: Discussionmentioning

confidence: 68%

“…Most of the populations in P2 have ages between 30 and 40 Ma and are related to apatites derived from erosion of exhumed bedrock exposed along the TAM front as they match exhumation phases described in the literature (Fitzgerald, ; Olivetti et al., , ; Zattin et al., ). Such AFT ages are rare in the Dry Valley (Fitzgerald, Baldwin, Webb, & O'Sullivan, ; Gleadow & Fitzgerald, ) but they have been detected in the Royal Society Range (Olivetti et al., ) and are also abundant to the south, between the Skelton and Byrd Glaciers (Huerta, Blythe, & Utevsky, ; Zattin et al., ) as well as much further (600 km) to the south (Fitzgerald, ; Fitzgerald & Stump, ; Miller, Fitzgerald, & Baldwin, ; Stump & Fitzgerald, ) (Figure ).…”

Section: Discussionmentioning

confidence: 81%

See 1 more Smart Citation

A detrital apatite fission‐track study of the CIROS‐2 sedimentary record: Tracing ice pathways in the Ross Sea area over the last 5 Ma

Zattin

Olivetti

2019

Terra Nova

Self Cite

View full text Add to dashboard Cite

The Ross Sea is a crucial area to investigate pathways of ice during the Cenozoic as it records the evolution of both the East and West Antarctic Ice Sheets. This work is based on detrital apatite fission track (AFT) data extracted from the sedimentary record of well CIROS‐2, which spans the last 5 Ma. The AFT data show a large range of ages, and most of the grains fit well with two main components that fall between 24 and 42 Ma and between 43 and 70 Ma, whereas the other components are not regularly distributed through the well, thus indicating a mixture of provenance from different areas along the Transantarctic Mountains. As a whole, our work suggests glacial expansion over the McMurdo Sound during the Pliocene, and ice periodically invading and retreating in Pleistocene.

show abstract

Section: Discussionmentioning

confidence: 68%

Section: Discussionmentioning

confidence: 81%

A detrital apatite fission‐track study of the CIROS‐2 sedimentary record: Tracing ice pathways in the Ross Sea area over the last 5 Ma

Zattin

Olivetti

2019

Terra Nova

Self Cite

View full text Add to dashboard Cite

show abstract

“…In fact, although extensional tectonics has been proved along the margins of the West Antarctic Rift System during the Neogene (Cooper & Davey, 1985;LeMasurier, 2008), apatite fission track bedrock ages younger than about 20 Ma have been never found. The youngest exhumation event has been described by Spiegel et al (2016) Geochemistry, Geophysics, Geosystems erosion of exhumed blocks exposed along the TAM front as they match exhumation phases detected on bedrock samples (Fitzgerald, 2002;Olivetti et al, 2015Olivetti et al, , 2018Zattin et al, 2014). Actually, such fission track ages are rare in the Dry Valleys (Fitzgerald et al, 2006;Gleadow & Fitzgerald, 1987) and Granite Harbor region (Fitzgerald, 1992), but they have been detected in the Royal Society Range (Olivetti et al, 2018) and are also abundant to the south, between the Skelton and Byrd Glaciers (Huerta et al, 2011;Zattin et al, 2014) as well as much farther (600 km) to the south (Fitzgerald, 1994;Fitzgerald & Stump, 1997;Miller et al, 2010;Stump & Fitzgerald, 1992).…”

Section: Identification Of Eais and Wais Sourcesmentioning

confidence: 94%

“…Jurassic-Cretaceous burial and post-Eocene exhumation (Lisker & Laufer, 2013;Prenzel et al, 2013Prenzel et al, , 2014Prenzel et al, , 2018 and (ii) an along-strike regional variability in the amount of exhumation (Olivetti et al, 2018).…”

Section: Geochemistry Geophysics Geosystemsmentioning

confidence: 99%

“…The present‐day exposure of the TAM is the result of different exhumation episodes, well recorded by thermochronology techniques. The former interpretation consisting in a stepwise monotonous exhumation since Jurassic for the whole TAM is currently under revision and many authors provided evidence for (i) Jurassic‐Cretaceous burial and post‐Eocene exhumation (Lisker & Laufer, 2013; Prenzel et al, 2013, 2014, 2018) and (ii) an along‐strike regional variability in the amount of exhumation (Olivetti et al, 2018).…”

Section: Geological Settingmentioning

confidence: 99%

See 1 more Smart Citation

Apatite Fission Track Signatures of the Ross Sea Ice Flows During the Last Glacial Maximum

Zattin

Olivetti

2020

Geochem Geophys Geosyst

Self Cite

View full text Add to dashboard Cite

The catchment for the Ross Sea ice includes both the East and the West Antarctic ice sheets, but the mass balance is a direct response to climate change. Our work is aimed to reconstruct the ice flows after the Last Glacial Maximum and is based on apatite fission track data from samples collected from 18 piston cores across the Ross Sea embayment. Fission track ages have been divided into meaningful populations and then compared with bedrock ages from West and East Antarctica. Furthermore, fission track lengths have been measured on each population and then compared through forward modeling with thermal histories derived from literature. The widespread presence of apatites with cooling ages of about 30-40 Ma reveals a main exhumation phase of the Transantarctic Mountains during the Oligocene associated to the last phases of the West Antarctic Rift System. Furthermore, the presence of key marker apatites (e.g., younger than 21 Ma or older than 230 Ma) allows to identify the Central High as a major ice flow divide.

show abstract

Eruptive history of Mason Spur, a Miocene—Pleistocene polygenetic volcanic complex in southern Victoria Land, West Antarctic Rift System, Antarctica

et al. 2022

View full text Add to dashboard Cite

Mason Spur is a deeply eroded Middle Miocene to Pleistocene (c. 13 to 0.37 Ma) volcanic complex in southern Victoria Land, within the West Antarctic Rift System (WARS). The oldest rocks include a large volume of trachyte ignimbrites that provided abundant volcanic detritus recovered in McMurdo Sound drill cores. The ignimbrites together with early-formed intrusions were strongly deformed during a substantial caldera collapse at c. 13 Ma. Intense erosion modified the volcanic landscape, creating a paleo-relief of several hundred metres. Deep ravines were cut and filled by deposits of multiple lahars probably linked to gravitational collapses of trachyte dome(s). Small-volume trachytic magmas were also erupted, forming lavas and at least one tuff cone. The youngest trachytic activity comprises a lava dome and related block-and-ash-flow deposits, erupted at 6 Ma. Basanite erupted throughout the history of the complex and eruptions younger than 12 Ma are almost exclusively basanite, forming scoria cones, water-cooled lavas, and tuff cones. Three peripheral outcrops are composed of basanitic ‘a‘ā lava-fed deltas, probably erupted from vents on neighbouring volcanoes at Mount Discovery and Mount Morning. Abundant ignimbrite deposits at Mason Spur differentiate this volcanic complex from others in the WARS. Eruptions were triggered by rift extension initially, yielding the voluminous trachytes sourced from a magma chamber on the margin of the WARS. Later mafic eruptions were associated with deep crustal faults related to residual intraplate deformation. These results add important details to the eruptive history of the intracontinental WARS.

show abstract

Variability in uplift, exhumation and crustal deformation along the Transantarctic Mountains front in southern Victoria Land, Antarctica

Cited by 13 publications

References 77 publications

A detrital apatite fission‐track study of the CIROS‐2 sedimentary record: Tracing ice pathways in the Ross Sea area over the last 5 Ma

A detrital apatite fission‐track study of the CIROS‐2 sedimentary record: Tracing ice pathways in the Ross Sea area over the last 5 Ma

Apatite Fission Track Signatures of the Ross Sea Ice Flows During the Last Glacial Maximum

Eruptive history of Mason Spur, a Miocene—Pleistocene polygenetic volcanic complex in southern Victoria Land, West Antarctic Rift System, Antarctica

Contact Info

Product

Resources

About