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Palaeoenvironmental signatures revealed from rare earth element (REE) compositions of vertebrate microremains of the Vesiku Bone Bed (Homerian, Wenlock), Saaremaa Island, Estonia
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
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2015 (English)In: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, no 1, 36-41 p.Article in journal (Refereed) Published
Abstract [en]

Rare earth elements (REEs) have been analysed from fossil vertebrate microremains (thelodont scales) from the Vesiku Bone Bed, Saaremaa, Estonia, using in situ microsampling by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Well-preserved scales of three species of the genus Thelodus (T. carinatus, T. laevis and Thelodus sp.) show very uniform REE patterns with slightly lower overall REE concentrations in enameloid than in dentine, with enrichment in middle REEs, depletion in heavy REEs and pronounced negative europium anomaly, but no cerium anomaly. The results of this study suggest a similar diagenetic history and possibly contemporaneous habitats for all three Thelodus species, as well as possible suboxic to anoxic conditions of the bottom and pore waters during the formation of the Vesiku Bone Bed.

Place, publisher, year, edition, pages
2015. Vol. 64, no 1, 36-41 p.
Keyword [en]
Vesiku Bone Bed, rare earth element, REE, palaeoenvironment, thelodonts, Silurian
National Category
Developmental Biology Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-251825DOI: 10.3176/earth.2015.07ISI: 000351327700008OAI: oai:DiVA.org:uu-251825DiVA: diva2:808169
Available from: 2015-04-27 Created: 2015-04-24 Last updated: 2017-12-04Bibliographically approved

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Zigaite, ZivileBlom, HenningAhlberg, Per Erik

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