Strontium isotope ratios of pore waters and planktonic foraminifera from DSDP holes ...
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 str...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
1986
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.712599 https://doi.pangaea.de/10.1594/PANGAEA.712599 |
| Summary: | 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. ... : Supplement to: Hess, Jennifer; Bender, Michael L; Schilling, Jean-Guy (1986): Evolution of the ratio of strontium-87 to strontium-86 in seawater from Cretaceous to present. Science, 231(4741), 979-984 ... |
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