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Trace-element and stable-isotope composition of the Cyprideis torosa (Crustacea, Ostracoda) shell

Jonathan A. Holmes and Patrick De Deckker
Trace-element and stable-isotope composition of the Cyprideis torosa (Crustacea, Ostracoda) shell (in Thematic set; Cyprideis torosa, Anonymous)
Journal of Micropalaeontology (2016) 36 (1): 38-49

Abstract

Shells of Cyprideis, a widespread euryhaline ostracod, have commonly been used in geochemical investigations involving determinations of trace elements (especially magnesium and strontium) and isotopes (of oxygen, carbon and strontium). In this paper, we evaluate geochemical signatures in Cyprideis based on new and previously published data. Mg/Ca and Sr/Ca determinations of fossil shells that calcified in marine-type water have potential to reconstruct palaeotemperature and past water composition using empirical relationships derived from living ostracods recovered from in vitro cultures or natural settings. For shells that calcified in non-marine waters of contrasting composition, partitioning of trace metals from water into ostracod shells may differ, meaning that relationships developed for marine waters do not apply. However, variations in Mg/Ca and Sr/Ca in Cyprideis in continental settings may still provide valuable palaeohydrological information. Determinations of oxygen isotopes in Cyprideis shells are consistent with positive offsets from equilibrium, in common with other ostracod taxa: carbon-isotope values reflect the fact that Cyprideis is a detritivore. Oxygen-isotope analyses of Cyprideis shells from continental settings provide important palaeohydrological information. Strontium-isotope analyses of Cyprideis shells provide valuable records of mixing of marine and continental water in marginal-marine settings. Geochemical analyses of different morphotypes of Cyprideis lend support to suggestions that ecophenotypic variations are controlled by factors other than, or additional to, salinity.


ISSN: 0262-821X
EISSN: 2041-4978
Serial Title: Journal of Micropalaeontology
Serial Volume: 36
Serial Issue: 1
Title: Trace-element and stable-isotope composition of the Cyprideis torosa (Crustacea, Ostracoda) shell
Title: Thematic set; Cyprideis torosa
Author(s): Holmes, Jonathan A.De Deckker, Patrick
Author(s): Anonymous
Affiliation: University College London, Environmental Change Research Centre, London, United Kingdom
Pages: 38-49
Published: 2016
Text Language: English
Publisher: British Micropalaeontological Society, London, United Kingdom
References: 82
Accession Number: 2017-006370
Categories: Invertebrate paleontologyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch maps
N57°15'00" - N57°15'00", W05°40'00" - W05°40'00"
N50°36'00" - N51°30'00", W02°30'00" - E00°42'00"
N51°27'00" - N51°27'00", E00°39'00" - E00°39'00"
Secondary Affiliation: Australian National University, AUS, Australia
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201705
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