Build-up and chronology of blue ice moraines in Queen Maud Land, Antarctica

Basit Öğe Kaydı
dc.authoridYesilyurt, Serdar/0000-0002-2896-9644
dc.authoridVockenhuber, Christof/0000-0002-2141-0733
dc.authoridHippe, Kristina/0000-0003-0946-9772
dc.authoridOZSOY, BURCU/0000-0003-4320-1796
dc.contributor.authorAkcar, Naki
dc.contributor.authorYesilyurt, Serdar
dc.contributor.authorHippe, Kristina
dc.contributor.authorChristl, Marcus
dc.contributor.authorVockenhuber, Christof
dc.contributor.authorYavuz, Vural
dc.contributor.authorOzsoy, Burcu
dc.date.accessioned2025-02-20T08:42:18Z
dc.date.available2025-02-20T08:42:18Z
dc.date.issued2020
dc.departmentTürk-Alman Üniversitesien_US
dc.description.abstractBlue ice moraines are common supraglacial landforms in Antarctica and they are considered to record the ice volume fluctuations. In this study, we use photogrammetry and the analysis of multiple cosmogenic nuclides (Be-10, Al-26, and in-situ C-14) in boulders on three blue ice moraines to explore the timing of ice volume fluctuations in the Sor Rondane Mountains, Queen Maud Land, and provide insights into the role of sediment sources in the reconstruction of their chronology. In the field, we observe that the blue ice moraines are composed of subglacially and supraglacially transported sediments. Cosmogenic Be-10 and Al-26 exposure ages of 14 surface samples, collected from boulders on three blue ice moraines, range from 15.4 +/- 1.1 to 659.5 +/- 33.9 ka. Al-26/Be-10 ratios vary between 3.53 +/- 0.20 and 7.01 +/- 0.32, and many of these ratios indicate complex exposure histories. In contrast, among nine in-situ C-14 exposure ages, five vary between 4.2 +/- 0.1 and 22.0 +/- 1.3 ka, and four are saturated. We conclude that the accumulation of these blue ice moraines commenced before or during the global Last Glacial Maximum. Our results indicate that surficial sediment sources can yield exposure ages that are older than real exposure age, and exhibit a wider scatter. This can alter the reconstructed chronology of these landforms. The analysis of in-situ C-14 has a high potential in tracking the pace of their evolution, especially since the Last Glacial Maximum.
dc.description.sponsorshipTurkish Republic Presidency - Ministry of Science, Industry and Technology; ITU PolRec; Swiss National Science Foundation [200021-172475]; Swiss Polar Institute; University of Bern; Swiss National Science Foundation (SNF) [200021_172475] Funding Source: Swiss National Science Foundation (SNF)
dc.description.sponsorshipWe would like to thank Polar Research Center team at the Istanbul Technical University for organizing our participation in the BELARE 2017-2018 Expedition within the bilateral scientific collaboration program of the second Turkish Antarctic Expedition, TAE-II 2017-2018. We are grateful to thank Alain Hubert, Nighat Amin, and Michel de Wouters at the International Polar Foundation for their support both in the logistics and field. We would also like to thank the Princess Elisabeth Antarctica Research Station Team for their support during our field campaign. We are also grateful to the Laboratory of Ion Beam Physics accelerator mass spectrometry facility operated by the Swiss Federal Institute of Technology, Zurich, Switzerland. This study was carried out under the auspices of the Turkish Republic Presidency, supported by the Ministry of Science, Industry and Technology, and coordinated by Istanbul Technical University Polar Research Center (ITU PolRec). It was financed by the ITU PolRec, Swiss National Science Foundation [grant number 200021-172475], Swiss Polar Institute, and University of Bern.
dc.identifier.doi10.1016/j.qsa.2020.100012
dc.identifier.issn2666-0334
dc.identifier.scopus2-s2.0-85093704764
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.qsa.2020.100012
dc.identifier.urihttps://hdl.handle.net/20.500.12846/1635
dc.identifier.volume2en_US
dc.identifier.wosWOS:000903528000006
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofQuaternary Science Advances
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250220
dc.subjectBlue ice moraineen_US
dc.subjectSurface exposure datingen_US
dc.subjectCosmogenic nuclideen_US
dc.subjectInheritanceen_US
dc.subjectSor rondaneen_US
dc.titleBuild-up and chronology of blue ice moraines in Queen Maud Land, Antarctica
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu