Pretreatment of coral aragonite for Mg and Sr analysis: Implications for coral thermometers
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概要
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Trace elements (e.g., Sr, Mg, and U) in coral skeletons are widely used as a potential robustpaleothermometers. However, there is little consensus among workers on the chemical pretreatment ofskeletal samples, which contain small amounts of organic material and inorganic detritus enriched in manymetals compared to the skeleton. We tested the analytical effects of chemical treatment on coral aragoniteby comparing several chemical treatments for Mg/Ca and Sr/Ca ratios as well as oxygen and carbon isotopicratios. Our results suggested that the Sr/Ca ratio and stable isotopic ratios are resistant to chemicaltreatments. However, organic matter or crystal surfaces in corals could absorb more than 40% of magnesiumalthough 60% of magnesium in coral aragonite substitutes for calcium. Our results suggest that it isexpedient to remove impurities by the method outlined here, especially before determining Mg/Ca ratiosin corals for paleoenvironmental reconstruction.
- The Geochemical Society of Japanの論文
- 2001-08-01
The Geochemical Society of Japan | 論文
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- Pretreatment of coral aragonite for Mg and Sr analysis: Implications for coral thermometers