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dc.contributor.authorJang, Kwangchul
dc.contributor.authorBayon, Germain
dc.contributor.authorHan, Yeongcheol
dc.contributor.authorJoo, Young Ji
dc.contributor.authorKim, Ji-Hoon
dc.contributor.authorRyu, Jong-Sik
dc.contributor.authorWoo, Jusun
dc.contributor.authorForwick, Matthias
dc.contributor.authorSzczuciński, Witold
dc.contributor.authorKim, Jung-Hyun
dc.contributor.authorNam, Seung-Il
dc.date.accessioned2021-02-10T13:19:23Z
dc.date.available2021-02-10T13:19:23Z
dc.date.embargoEndDate2022-05-15
dc.date.issued2020-05-15
dc.description.abstract<p>Neodymium (Nd) isotopes in leached authigenic components of marine sediments have been increasingly used as a tracer of past ocean-water masses. Despite the general assumption that the Nd isotopic composition of solutes released during chemical weathering fingerprints the source rocks on continents, preferential dissolution of easily dissolvable phases may result in significant deviations in Nd isotopic composition between the solutes and the source rocks, with potential implications for the utility of Nd isotopes in paleoenvironmental studies. Here, we present the Nd isotopic compositions of leached and detrital fractions separated from bedrock and marine sediment samples from the Svalbard archipelago. Our goal is to further understand the behaviour of Nd isotopes during chemical weathering in glacial catchments and evaluate how glacier fluctuations and associated weathering congruency may have affected the export of dissolved Nd isotope signatures to seawater. <p>Our results confirm that terrestrial weathering on Svalbard causes considerable Nd isotopic decoupling between the leached and detrital fractions of fjord sediments (△ε<sub>Nd</sub>), resulting from the preferential dissolution of marine precipitates in glaciated catchments dominated by sedimentary rocks. We also show that the degree of Nd isotopic decoupling has fluctuated in response to climate variability on Svalbard during the Holocene, which is also as suggested by the occurrence of generally higher △ε<sub>Nd</sub> values during periods of glacier advances in sediment cores retrieved from two different fjords (Dicksonfjorden and Woodfjorden). We posit that the high △ε<sub>Nd</sub> values can be ascribed to incongruent chemical weathering of fresh rock flour produced by glacial abrasion. This finding suggests that the degree of Nd isotopic decoupling could be used as a new proxy for tracing glacial fluctuations and associated glacier-derived nutrient inputs to the marine realm.en_US
dc.identifier.citationJang, Bayon, Han, Joo, Kim, Ryu, Woo, Forwick, Szczuciński, Kim, Nam. Neodymium isotope constraints on chemical weathering and past glacial activity in Svalbard. Earth and Planetary Science Letters. 2020;542en_US
dc.identifier.cristinIDFRIDAID 1867038
dc.identifier.doi10.1016/j.epsl.2020.116319
dc.identifier.issn0012-821X
dc.identifier.issn1385-013X
dc.identifier.urihttps://hdl.handle.net/10037/20551
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalEarth and Planetary Science Letters
dc.rights.accessRightsembargoedAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466en_US
dc.titleNeodymium isotope constraints on chemical weathering and past glacial activity in Svalbarden_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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