Trace-element chemistry of non-marine ostracod shells: a preliminary evaluation of cleaning methods

  • Holmes J
12Citations
Citations of this article
17Readers
Mendeley users who have this article in their library.

Abstract

<p><strong>Abstract.</strong> Trace-element analysis of ostracod shells has been shown to be a powerful tool in Quaternary palaeoenvironmental reseach (e.g. Chivas <i>et al</i>., 1986). Particular use has been made of Sr/Ca and Mg/Ca ratios in ostracod shells as palaeosalinity and palaeotemperature indictors. However, work on trace elements such as Cd, Zn, Cu and Ba in benthic foraminifera (e.g, Boyle, 1981) has shown that chemical cleaning of the shell is necessary to remove surface-bound contaminants, so that only the lattice-bound elements are analyzed. This note describes the application of selected cleaning methods to non-marine ostracod shells and evaluates their effect on shell chemistry with particular reference to Sr, Mg, Mn and Fe.<br/><br/>Samples of ostracod shells were taken from late Quaternary lacustrine marls from Wallywash Great Pond, Jamaica. Adult valves of the genus <i>Cypretta</i> Vàrva 1895 were selected at random and subjected to one of three cleaning methods as follows.<br/><br/>Method A: shells cleaned thoroughly with a clean nylon paint brush (0000) and deionised water, until all visible particles (under x40 magnification) had been removed. Shells cleaned by methods B and C were also initially treated in this way.<br/><br/>Method B: shells cleaned in a basic hydroxylamine hydrochloride solution at 80°C for 30 minutes and then rinsed in deionised water (Boyle, 1981).<br/><br/>Method C: shells cleaned in a basic sodium dithionite complexing reagent at 80°C for 30 minutes and then rinsed with deionised water (Boyle, 1981).<br/><br/>Nine individual valves were cleaned using each method. Once cleaned, the valves were individually dissolved in 3ml. . .</p>

Cite

CITATION STYLE

APA

Holmes, J. A. (1992). Trace-element chemistry of non-marine ostracod shells: a preliminary evaluation of cleaning methods. Journal of Micropalaeontology, 11(1), 36–36. https://doi.org/10.1144/jm.11.1.36

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free