Cosmogenic helium signatures at Deception Island volcano (Antarctica): geochronological implications for its eruptive history

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dc.citation.issue1
dc.citation.volume15
dc.contributor.authorÁlvarez-Valero AM
dc.contributor.authorSumino H
dc.contributor.authorBurgess R
dc.contributor.authorArribas L
dc.contributor.authorPolo-Sánchez A
dc.contributor.authorGeyer A
dc.contributor.authorCaracausi A
dc.contributor.authorAlbert H
dc.contributor.authorAulinas M
dc.contributor.authorBan M
dc.contributor.authorBorrajo J
dc.contributor.authorGarcía-Arias M
dc.contributor.authorIchikawa G
dc.contributor.authorKereszturi G
dc.contributor.authorRodríguez JAL
dc.date.accessioned2025-08-06T01:56:46Z
dc.date.available2025-08-06T01:56:46Z
dc.date.issued2025-12-01
dc.description.abstractCosmogenic nuclei production for dating the Earth surface exposure of rock/mineral samples, especially 3He, is a robust technique in geochronology. We describe its application to constrain the ages of key eruptive episodes of the volcanic history of Deception Island (Antarctica): (i) the volcanic products of the island formed before the caldera collapse (pre-caldera material); and (ii) the caldera-forming event (syn-caldera material). High 3He/4He ratios (up to 910 RA; RA = 1.39 × 10–6) in the crystal structure of olivine phenocrysts measured through total fusion He release are much higher than the magmatic values previously obtained in the inclusions of the same olivines obtained by hydraulic crushing. Such high values indicate a cosmogenic origin and reveal an age of c. 4 Ma for the pre-caldera material, and c. 4.6 ka and 170 ka for the syn-caldera deposits. The result of c. 4.6 ka for the caldera collapse episode is consistent with previous age estimations based on tephrochronology, whereas the c. 170 ka result reveals the presence of pre-caldera olivines embedded in the syn-caldera deposits that experienced less exposure to cosmic rays compared to the samples with ages of 4 Ma. This oldest age estimate represents the first quantitative geochronological approach attempting to date Deception Island formation.
dc.description.confidentialfalse
dc.edition.editionDecember 2025
dc.identifier.author-urlhttps://orcid.org/0000-0003-4336-2012
dc.identifier.citationÁlvarez-Valero AM, Sumino H, Burgess R, Arribas L, Polo-Sánchez A, Geyer A, Caracausi A, Albert H, Aulinas M, Ban M, Borrajo J, García-Arias M, Ichikawa G, Kereszturi G, Rodríguez JAL. (2025). Cosmogenic helium signatures at Deception Island volcano (Antarctica): geochronological implications for its eruptive history. Scientific Reports. 15. 1.
dc.identifier.doi10.1038/s41598-025-03925-5
dc.identifier.eissn2045-2322
dc.identifier.elements-typejournal-article
dc.identifier.number24683
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/73299
dc.languageEnglish
dc.publisherSpringer Nature Limited
dc.publisher.urihttps://www.nature.com/articles/s41598-025-03925-5
dc.relation.isPartOfScientific Reports
dc.rights(c) The author/sen
dc.rights.licenseCC BY-NC-NDen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.titleCosmogenic helium signatures at Deception Island volcano (Antarctica): geochronological implications for its eruptive history
dc.typeJournal article
pubs.elements-id501633
pubs.organisational-groupOther
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