McArthur, J;
Howarth, RJ;
(2005)
Strontium isotope stratigraphy.
In: Gradstein, F and Ogg, J, (eds.)
A Geologic Time Scale 2004.
(pp. 96-105).
Cambridge University Press: Cambridge, UK.
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Abstract
The 87Sr/86Sr value of Sr dissolved in the world's oceans has varied though time, which allows one to date and correlate sediments. This variation and its stratigraphic resolution is discussed and graphically displayed. INTRODUCTION The ability to date and correlate sediments using Sr isotopes relies on the fact that the 87Sr/86Sr value of Sr dissolved in the world's oceans has varied though time. In Fig. 7.1, we show this variation, plotted according to the time scale presented in this volume. More detail is given in Fig. 7.2, on which we plot both the curve of 87Sr/86Sr through time and the data used to derive it. Comparison of the measured 87Sr/86Sr of Sr in a marine mineral with a detailed curve of 87Sr/86Sr through time can yield a numerical age for the mineral. Alternatively, 87Sr/86Sr can be used to correlate between stratigraphic sections and sequences by comparison of the 87Sr/86Sr values in minerals from each (Fig. 7.3). Such correlation does not require a detailed knowledge of the trend through time of 87Sr/86Sr, but it is useful to know the general trend in order to avoid possible confusion in correlation near turning points on the Sr curve. Strontium isotope stratigraphy (SIS) can be used to estimate the duration of stratigraphic gaps (Miller et al., 1988), estimate the duration of biozones (McArthur et al., 1993, 2000, 2004) and stages (Weedon and Jenkyns, 1999), and to distinguish marine from non-marine environments (Schmitz et al., 1991; Poyato-Ariza et al., 1998).
| Type: | Book chapter |
|---|---|
| Title: | Strontium isotope stratigraphy |
| ISBN: | 0521786738 |
| ISBN-13: | 9780521781428 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1017/CBO9780511536045.008 |
| Publisher version: | https://doi.org/10.1017/CBO9780511536045.008 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10095852 |
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