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Evolution of the Ratio of Strontium-87 to Strontium-86 in Seawater from Cretaceous to Present
Abstract
A detailed record of the strontium-87 to strontium-86 ratio in seawater during the last 100 million years was determined by measuring this ratio in 137 well-preserved and well-dated fossil foraminifera samples. Sample preservation was evaluated from scanning electron microscopy studies, measured strontium-calcium ratios, and pore water strontium isotope ratios. The evolution of the strontium isotopic ratio in seawater offers a means to evaluate long-term changes in the global strontium isotope mass balance. Results show that the marine strontium isotope composition can be used for correlating and dating well-preserved authigenic marine sediments throughout much of the Cenozoic to a precision of ±1 million years. The strontium-87 to strontium-86 ratio in seawater increased sharply across the Cretaceous/Tertiary boundary, but this feature is not readily explained as strontium input from a bolide impact on land.
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Cited by
87Sr/86Sr, δ13C and δ18O evolution of Phanerozoic seawater
Veizer, J., Ala, D., Azmy, K., Bruckschen, P., Buhl, D., Bruhn, F., Carden, G. A. F., Diener, A., Ebneth, S., Godderis, Y., et al. (1999) · Chemical Geology · doi:10.1016/s0009-2541(99)00081-9 · Cited by 2,694
Recent trends in strontium isotope stratigraphy
McArthur, J. M. (1994) · Terra Nova · doi:10.1111/j.1365-3121.1994.tb00507.x · Cited by 408
Li, L., & Keller, G. (1998) · Marine Micropaleontology · doi:10.1016/s0377-8398(97)00027-3 · Cited by 264
O'Keefe, J. D., & Ahrens, T. J. (1989) · Nature · doi:10.1038/338247a0 · Cited by 158
Metadata
- Authors
- Hess, J., Bender, M. L., & Schilling, J.-G.
- Venue
- Science
- Published
- 1986-02-28
- Volume
- 231
- Issue
- 4741
- Pages
- 979-984
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1968545963
- Cited by
- 444
- References
- 0
- FWCI
- 21.70
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Evolution of the Ratio of Strontium-87 to Strontium-86 in Seawater from Cretaceous to Present. https://app.cochat.ai/papers/10.1126/science.231.4741.979
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- Hess, J., Bender, M. L., & Schilling, J.-G. (1986). Evolution of the Ratio of Strontium-87 to Strontium-86 in Seawater from Cretaceous to Present. Science. https://doi.org/10.1126/science.231.4741.979
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