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Academic & Professional Books  Earth System Sciences  Geosphere  Geophysics & Geochemistry

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

By: B Lynn Ingram(Author), Donald J DePaolo(Author)
75 pages
Sr Isotopes in Seawater
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  • Sr Isotopes in Seawater ISBN: 9781108994293 Paperback Mar 2022 Usually dispatched within 6 days
    £16.99
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Price: £16.99
About this book Contents Customer reviews Related titles

About this book

Studies of strontium 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.

Contents

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

Customer Reviews

By: B Lynn Ingram(Author), Donald J DePaolo(Author)
75 pages
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