McArthur, JM;
Howarth, RJ;
Shields, G;
Zhou, Y;
(2020)
Chapter 7 - Strontium Isotope Stratigraphy.
In:
Geologic Time Scale 2020.
(pp. 211-238).
Elsevier
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Abstract
The 87Sr/86Sr value of Sr dissolved in the world’s oceans has varied through time in a known way. When minerals, such as biogenic calcite, precipitate from seawater, they incorporate Sr from seawater and capture the 87Sr/86Sr value for marine-Sr at the time of precipitation. Measurement of the 87Sr/86Sr value in fossil precipitates, such as belemnites or foraminifera, can therefore be used to date and to correlate worldwide the marine sedimentary rocks in which the precipitates occur. Here, the theory and practice of the methodology is outlined. The variation of marine-87Sr/86Sr through time is usually ascribed to changing fluxes of Sr from mid-ocean-ridge volcanism (87Sr/86Sr≈0.703) coupled with changing 87Sr/86Sr and flux through time of riverine inputs to the ocean of Sr with a high ratio (≈0.711).
| Type: | Book chapter |
|---|---|
| Title: | Chapter 7 - Strontium Isotope Stratigraphy |
| ISBN-13: | 9780128220429 |
| DOI: | 10.1016/B978-0-12-824360-2.00007-3 |
| Publisher version: | https://doi.org/10.1016/B978-0-12-824360-2.00007-3 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | 87Sr/86Sr; LOESS; Phanerozoic; chemostratigraphy; methods; trends |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices 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/10126640 |
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