Testing the effect of carbonate saturation on the Sr/Ca of biogenic aragonite: A case study from the River Ehen, Cumbria, UK

Bailey, Trevor R. and Lear, Caroline Helen ORCID: https://orcid.org/0000-0002-7533-4430 2006. Testing the effect of carbonate saturation on the Sr/Ca of biogenic aragonite: A case study from the River Ehen, Cumbria, UK. Geochemistry Geophysics Geosystems 7 (3) , Q03019. 10.1029/2005GC001084

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Abstract

It has been suggested that the incorporation of strontium into biogenic aragonite may be influenced by the degree of carbonate saturation in aquatic environments. We measured the Sr/Ca ratios of river water and the aragonitic shells of freshwater bivalves (Margaritifera margaritifera) from two sites with different carbonate saturation states in the River Ehen, Cumbria, UK. Shell Sr/Ca and river water Sr/Ca are 0.1 mmol/mol and 0.42 mmol/mol lower, respectively, at the high carbonate saturation site. However, the distribution coefficients of strontium into aragonite (KD) are the same (∼0.28) at both sites. These analyses show that Sr uptake into aragonite bivalve shells is not affected by the degree of carbonate saturation of the water, perhaps reflecting a strong biological control on trace element incorporation.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	G Geography. Anthropology. Recreation > GC Oceanography Q Science > QE Geology
Uncontrolled Keywords:	Carbonate saturation; Sr/Ca; biogenic aragonite; bivalves; Margaritifera margaritifera; River Ehen
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1525-2027/ (accessed 20/02/2014).
Publisher:	American Geophysical Union.
ISSN:	1525-2027
Date of First Compliant Deposit:	30 March 2016
Last Modified:	08 May 2023 12:25
URI:	https://orca.cardiff.ac.uk/id/eprint/11551

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