| 颗石藻元素地球化学研究进展 |
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| 引用本文： | 梁丹,刘传联.颗石藻元素地球化学研究进展[J].地球科学进展,2012,27(2):217-223. |
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| 作者姓名： | 梁丹 刘传联 |
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| 作者单位： | 同济大学海洋地质国家重点实验室,上海,200092 |
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| 基金项目： | 国家自然科学基金项目“南海现代颗石藻及其环境响应” |
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| 摘 要： | 颗石藻元素地球化学研究在古海洋学研究中有着重要意义。目前开始研究的主要有Sr/Ca和Mg/Ca比值。研究发现,颗石的Sr/Ca比值主要受颗石藻生长和钙化速度控制,其次受温度影响;而Mg/Ca比值主要与温度有关,属种间受影响程度有差别。样品清洗和单种分离是颗石藻元素地球化学分析的重点和难点。倒置显微镜挑出单种颗石是目前最为方便且准确的分析方法。颗石Sr/Ca比值可以用来反映古生产力,Mg/Ca比值可以用来重建古温度。
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| 关 键 词： | 颗石藻 元素地球化学 Mg/Ca、Sr/Ca 古海洋学 |
Advances in Element Geochemistry Analysis of Coccolith |
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| Liang Dan,Liu Chuanlian.Advances in Element Geochemistry Analysis of Coccolith[J].Advance in Earth Sciences,2012,27(2):217-223. |
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| Authors: | Liang Dan Liu Chuanlian |
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| Institution: | State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China |
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| Abstract: | Element geochemistry of coccoliths is very meaningful in paleoceanographic study,e.g.,Sr/Ca and Mg/Ca ratios.This paper summarizes previous studiesof coccolith Sr/Ca and Mg/Ca.According to previous studies,coccolith Sr/Ca ratio is mainly controlled by growth rates and calcification rates,secondly by temperature.While coccolith Mg/Ca ratio is influenced by temperature,but temperature relation differs among species.It is criticalto clean samples and separate monospecific coccoliths.Ion probe method is the most convenient and accurate analytical method.Coccolith Sr/Ca ratio can be used to indicatepaleoproductivity,and Mg/Ca to reconstruct paleotemperature.Element geochemistry has a great potential in paleoceanography and paleoclimatology.This paper also introduces the principle and analytical method of coccolith Sr/Ca and Mg/Ca in detail. |
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| Keywords: | Coccolith Element geochemistry Mg/Ca Sr/Ca Paleoceanography |
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