Shields , Graham A., and Veizer, Ján (2004) Isotopic signatures. In: Webby, Barry D., Paris, Florentin, Droser, Mary L., and Percival, Ian G., (eds.) The Great Ordovician: biodiversification event. Critical Moments and Perspectives in Earth History and Paleobiology . Columbia University Press, New York, USA, pp. 68-71.
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Here we review current understanding of the isotope chemistry of Ordovician seawater as determined from published analyses of the isotopic compositions (strontium, neodymium, sulfur, carbon, and oxygen) of marine authigenic precipitates. Isotopic data have implications for our understanding of global dynamics and paleoenvironmental evolution; however, many published interpretations are still controversial. In general, the past 20 years have witnessed a laudable departure from using bulk samples to carefully selected calcite components, such as microstructurally pristine brachiopods and early marine cements, as subjects of geochemical study.
|Item Type:||Book Chapter (Research - B1)|
|Date Deposited:||22 Dec 2009 23:44|
|FoR Codes:||04 EARTH SCIENCES > 0402 Geochemistry > 040299 Geochemistry not elsewhere classified @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%|