Journal ArticleDOI
Isotopic composition of strontium in Cretaceous-to-Recent, pelagic foraminifera
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In this paper, the strontium isotopic composition of Cretaceous-to-Recent pelagic foraminifera was analyzed and it was shown that the87Sr/86Sr ratio for open ocean water has increased from about 0.7075 to about 0.7092 since Cretagen time.About:
This article is published in Earth and Planetary Science Letters.The article was published on 1971-05-01. It has received 81 citations till now. The article focuses on the topics: Foraminifera & Strontium.read more
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87Sr/86Sr, δ13C and δ18O evolution of Phanerozoic seawater
Ján Veizer,Ján Veizer,Davin Ala,Karem Azmy,Peter Bruckschen,Dieter Buhl,Frank Bruhn,Frank Bruhn,Giles A.F. Carden,Giles A.F. Carden,Andreas Diener,Stefan Ebneth,Yves Goddéris,Yves Goddéris,Torsten Jasper,Christoph Korte,Frank Pawellek,Olaf G. Podlaha,Olaf G. Podlaha,Harald Strauss +19 more
TL;DR: In this article, a total of 2128 calcitic and phosphatic shells, mainly brachiopods with some conodonts and belemnites, were measured for their δ 18 O, δ 13 C and 87 Sr / 86 S values.
Journal ArticleDOI
Variation of seawater 87Sr/86Sr throughout Phanerozoic time
TL;DR: In this paper, a curve of seawater 87Sr/86Sr versus geologic time through the Phanerozoic is presented, which provides a basis for dating many marine carbonate, evaporite, and phosphate samples.
Journal ArticleDOI
Strontium Isotopes in Seawater through Time
TL;DR: In this paper, the decay energy of isotope 87 (87Srp) was investigated and the recommended decay constant for 87Rb is 1.42 x 10-11 yr-I (Steiger & Jager 1977), and its half-life T is therefore 48.8 Gyr.
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High-resolution stratigraphy with strontium isotopes
TL;DR: Sedimentary rocks composed of accumulated fossil carbonate shells can be dated and correlated with the use of high precision measurements of the ratio of strontium-87 to strontum-86 with a resolution that is similar to that of other techniques used in age correlation.
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Evolution of the ratio of strontium-87 to strontium-86 in seawater from cretaceous to present.
TL;DR: 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.
References
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Strontium isotopes in weathering profiles, deep-sea sediments, and sedimentary rocks
TL;DR: In this paper, it was shown that even the finest fraction of aluminosilicates deposited in the ocean does not equilibrate with marine strontium, even after prolonged contact with sea water and interstitial marine water.
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Isotopic composition of strontium in sea water throughout Phanerozoic time
TL;DR: Isotopic analyses of strontium in primary fossil carbonate reveal significant variations in Sr 87 Sr 86 of sea water during the Phanerozoic as discussed by the authors, which are thought to be the result of a complex interplay of periods of intense volcanism and epeirogenic movements of the continents on a worldwide scale.
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Radiogenic Strontium-87 as an Index of Geologic Processes
Carl E. Hedge,F. G. Walthall +1 more
TL;DR: The data indicate that Sr87/Sr86 of the weathering crust has changed 1.1 percent in 3000 million years, while the ratio in the mantle has changed no more than 0.5 percent.
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Isotope Ratios: A Clue to the Age of Certain Marine Sediments
TL;DR: In this article, it was shown that if an element A has a radiogenic isotope, and a nonradiogenic one, $A_{1}/A_{2}$ is an index of the age of marine chemical sediments, if the content of the isotope B* producing $A{1}$ can be neglected.
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The isotopic composition of strontium in surface water from the North Atlantic Ocean
TL;DR: The isotopic composition of strontium in surface water from ten localities in the North Atlantic Ocean has been determined as discussed by the authors, and the results support the conclusion that the Sr 87 Sr 86 ratio of the ten samples is constant within experimental errors.