Profiles of strontium and barium in Mercenaria mercenaria and Spisula solidissima shells
Profiles of strontium and barium in Mercenaria mercenaria and Spisula solidissima shells
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DOI：
10.1016/0016-7037(96)00179-2
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发表时间：
1996-09
影响因子：
5
通讯作者：
H. Stecher;D. Krantz;C. Lord;G. Luther;K. Bock
中科院分区：
文献类型：
--
作者：
H. Stecher;D. Krantz;C. Lord;G. Luther;K. Bock
使用激光烧蚀电感耦合等离子体质谱 (LA-ICP-MS) 对两种 Mercenaria Mercenaria 贝壳（一种现代贝壳和一种更新世贝壳）以及一种现代 Spisula Solidissima 贝壳的横截面进行了微量金属分析。这些数据与 18 O 16 O 比率分布相结合，用作温度代理来确定给定贝壳地块的生长季节。贝壳显示 Sr 和 Ba 的波动有规律的年度模式。季节性 Sr 的减少与 Mercenaria 的冬季休眠期相关，以及 Spisula 的夏季生长减少表明，在该元素的掺入中，动力学控制（生长速率）比温度起着更重要的作用。钡的急剧增加可能与浮游植物生产力的旺盛时期有关。 LA-ICP-MS 应用于分析软体动物壳以记录个体发育趋势，证明了该技术提取地球化学信息的强大功能。
Cross sections of two Mercenaria mercenaria shells, one modern and one Pleistocene, and one modern Spisula solidissima shell were analyzed for trace metals using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). These data are coupled with18O16O ratio profiles, which are used as a temperature proxy to determine the season of growth for a given shell parcel. The shells show Sr and Ba fluctuations in regular annual patterns. Seasonal Sr decreases associated with the winter dormant period in Mercenaria, and with the summer growth decrease in Spisula indicate that kinetic control (growth rate) plays a more important role than temperature in the incorporation of this element. Barium exhibits sharp increases that are likely linked to periods of intense phytoplankton productivity. This application of LA-ICP-MS to the analysis of mollusk shells for documenting ontogenetic trends demonstrates the power of this technique for extracting geochemical information.