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A dynamic marine calcium cycle during the past 28 million years

Science

By:
, , , , and
DOI: 10.1126/science.1163614

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Abstract

Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. A high-resolution, continuous seawater calcium isotope ratio curve from marine (pelagic) barite reveals distinct features in the evolution of the seawater calcium isotopic ratio suggesting changes in seawater calcium concentrations. The most pronounced increase in the ??44/40Ca value of seawater (of 0.3 per mil) occurred over roughly 4 million years following a period of low values around 13 million years ago. The major change in marine calcium corresponds to a climatic transition and global change in the carbon cycle and suggests a reorganization of the global biogeochemical system.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A dynamic marine calcium cycle during the past 28 million years
Series title:
Science
DOI:
10.1126/science.1163614
Volume
322
Issue:
5908
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1671
Last page:
1674
Number of Pages:
4