Strontium content of ostracods indicates lacustrine palaeosalinity
Strontium content of ostracods indicates lacustrine palaeosalinity
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DOI：
10.1038/316251a0
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发表时间：
1985-07
期刊：
影响因子：
64.8
通讯作者：
A. Chivas;P. Deckker;J. Shelley
中科院分区：
文献类型：
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作者：
A. Chivas;P. Deckker;J. Shelley
个别非海洋介形类阀含有锶的比例，其主机湖水的锶含量。两种常见的共存的大型浮游物种，Mytilocypris praenuncia和Australocypris robusta，其Sr分配系数KD（Sr/Ca）为0.082，在10-18 °C范围内与温度无关。如果已知水文简单湖泊的盐度和Sr含量之间的关系，就可以从介形类化石中计算出古盐度。我们在这里提出的古盐度在过去的10,000年Keilambete湖，维多利亚，计算从介形虫Sr/Ca的化石材料是惊人的协议与独立的解释古盐度。盐度范围为14-95‰。我们还表明，一个可靠的定量连续指示湖泊古盐度是重要的古气候学和考古学和海洋-大陆气候的相关性和相互作用的大陆古环境的阐明。
Individual non-marine ostracod valves contain Sr in proportion to the Sr content of their host lake water. Two commonly coexisting, large planktonic species,Mytilocypris praenunciaandAustralocypris robusta, have a Sr distribution coefficientKD(Sr/Ca) of 0.082 which is independent of temperature in the range 10–18 °C. If the relationship between salinity and the Sr content of a hydrologically simple lake is known, palaeosalinities can be calculated from fossil ostracods. We present here palaeosalinities for the past 10,000 yr for Lake Keilambete, Victoria, calculated from ostracod Sr/Ca of fossil material which are in striking agreement with independent interpretations of palaeosalinity. The range of salinity spans 14–95‰. We also show that a reliable quantitative continuous indicator of lacustrine palaeosalinity is important for the elucidation of continental palaeoenvironments for palaeoclimatology and archaeology and ocean–continent climatic correlations and interactions.