Publication

A Reassessment of of the geochemical and isotopic fidelity of biogenic carbonates

Anders Meibom, Arthur Adams, Deyanira Graciela Cisneros Lazaro, Jinming Guo, Sylvain Louis Bernard, Tarek Axel Vennemann
2019
Conference Papers

Abstract

Oxygen isotope compositions of calcite foraminifera tests are considered to be a robust palaeotemperature proxy at earth-surface conditions, where diffusion is slow. Recrystallization of tests during diagenesis may be optically identified and is often the basis for excluding such samples from paleotemperature calculations e.g. “glassy” vs. “frosty” foraminifera. However, biogenic and abiogenic calcite can isotopically reequilibrate and recrystallize in calcite-saturated fluids, even at low temperatures (

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A Reassessment of of the geochemical and isotopic fidelity of biogenic carbonates

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