Sr Isotopes in Seawater: Stratigraphy, Paleo-Tectonics, Paleoclimate, and Paleoceanography

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B. Lynn Ingram (University of California, Berkeley) Donald J. DePaolo (University of California, Berkeley)

Sr Isotopes in Seawater

Stratigraphy, Paleo-Tectonics, Paleoclimate, and Paleoceanography

B. Lynn Ingram (University of California, Berkeley), Donald J. DePaolo (University of California, Berkeley)

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English

Cambridge University Press
31 March 2022

Geology & the lithosphere; Geochemistry; Hydrology & the hydrosphere; Oceanography (seas); Meteorology & climatology

Series: Elements in Geochemical Tracers in Earth System Science

Studies of Sr isotopic composition of thousands of samples of marine sediments and fossils have yielded a curve of 87Sr/86Sr versus age for seawater Sr that extends back to 1 billion years. The ratio has fluctuated with large amplitude during this time period, and because the ratio is always uniform in the oceans globally at any one time, it is useful as a stratigraphic correlation and age-dating tool. The ratio also appears to reflect major tectonic and climatic events in Earth history and hence provides clues as to the causes, timing, and consequences of those events. The seawater 87Sr/86Sr ratio is generally high during periods marked by continent-continent collisions, and lower when continental topography is subdued, and seafloor generation rates are high. There is evidence that major shifts in the seawater ratio can be ascribed to specific orogenic events and correlate with large shifts in global climate.

By: B. Lynn Ingram (University of California Berkeley), Donald J. DePaolo (University of California, Berkeley)
Imprint: Cambridge University Press
Country of Publication: United Kingdom
Edition: New edition
Dimensions: Height: 228mm, Width: 153mm, Spine: 3mm
Weight: 69g
ISBN: 9781108994293
ISBN 10: 1108994296
Series: Elements in Geochemical Tracers in Earth System Science
Pages: 75
Publication Date: 31 March 2022
Audience: General/trade , ELT Advanced
Format: Paperback
Publisher's Status: Active

Introduction; Sources and sinks of Sr in the oceans; How uniform is the 87Sr/86Sr of modern seawater?; Measuring 87Sr/86Sr ratios; Dating and Correlating Marine Sediments Using Sr Isotopes; The geologic meaning of seawater 87Sr/86Sr fluctuations; Concluding comments; Key papers.