Mg and Ca isotope fractionation during CaCO3 biomineralisation.
Mg and Ca isotope fractionation during CaCO3 biomineralisation.
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DOI：
10.1016/j.bbrc.2004.08.053
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发表时间：
2004-10
影响因子：
3.1
通讯作者：
V. T. Chang;R. J. Williams;Akio Makishima;Akio Makishima;Nick S Belshawl;R. O’nions
中科院分区：
文献类型：
--
作者：
V. T. Chang;R. J. Williams;Akio Makishima;Akio Makishima;Nick S Belshawl;R. O’nions
本文测定了有孔虫和礁珊瑚的碳酸盐骨架中碳酸盐的Mg和Ca稳定同位素的自然变化以及Mg/Ca比值，以评价生物矿化过程的影响。珊瑚文石的结果表明，其形成，在稳定同位素行为方面，近似于从海水水库无机沉淀。与此相反，有孔虫方解石的结果表明，镁同位素比值可能与其低镁含量与海水相比，一个显着的生物控制。这些意见的使用镁和钙同位素作为代理在古海洋学的轴承被认为是。
The natural variation of Mg and Ca stable isotopes of carbonates has been determined in carbonate skeletons of perforate foraminifera and reef coral together with Mg/Ca ratios to assess the influence of biomineralisation processes. The results for coral aragonite suggest its formation, in terms of stable isotope behaviour, approximates to inorganic precipitation from a seawater reservoir. In contrast, results for foraminifera calcite suggest a marked biological control on Mg isotope ratios presumably related to its low Mg content compared with seawater. The bearing of these observations on the use of Mg and Ca isotopes as proxies in paleoceanography is considered.