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Evaluating Mg/Ca in belemnite calcite as a palaeo-proxy

Li, Q.; McArthur, J.M.; Doyle, P.; Janssen, N.; Leng, M.J.; Müller, W.; Reboulet, S.. 2013 Evaluating Mg/Ca in belemnite calcite as a palaeo-proxy. Palaeogeography, Palaeoclimatology, Palaeoecology, 388. 98-108. 10.1016/j.palaeo.2013.07.030

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Abstract/Summary

The Mg/Ca, Sr/Ca, δ18O and δ13C compositions are given for well-preserved specimens of ten belemnite species/genera from three stratigraphic intervals. The data help assess the use of these proxies for palaeo-oceanography. Samples are from Dorset, UK (Pliensbachian; 5 species); Cambridgeshire, UK (Callovian; 1 species); and the Vocontian Basin, SE France (Valanginian; 4 genera). In none of these belemnite populations (at species or genera level) does Mg/Ca correlate with δ18O. Neither do values of δ18O correlate with Mg/Ca along a microsampled radial profile across a single specimen of Cylindroteuthis puzosiana (Callovian). The use of Mg/Ca is therefore considered to be unreliable as a palaeo-temperature indicator for these belemnite species and genera.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.palaeo.2013.07.030
ISSN: 00310182
Date made live: 27 Aug 2013 09:36 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/503057

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