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奥陶纪棘皮动物骨骼地球化学特征指示古海水Mg/Ca比的可靠性分析
早奥陶世 棘皮动物海百合 古海水Mg/Ca比 华南
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2014/4/3
显生宙棘皮动物骨骼均由高镁方解石组成，其骨骼的Mg/Ca比受海水Mg/Ca比、古海水温度、成岩作用等因素的影响. 研究以华南扬子区下奥陶统棘皮动物海百合化石为主要测试对象，通过能谱仪及波谱仪等微区原位分析方法，获得其骨骼可靠的Mg/Ca比. 化石骨骼显微构造和化学成分特征表明，扬子区下奥陶统海百合茎化石骨骼受到成岩作用的影响较弱，依旧保存有与壳体原始矿物有关的Mg含量特征. 测试结果显示，根据棘皮...
Coral growth-rate insensitive Sr/Ca as a robust temperature recorder at the extreme latitudinal limits of Porites
skeletal oxygen isotope in the coral Sr/Ca high latitudes coral growth rates
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2017/4/11
Oxygen isotope values of low-growth coral (<5 mm/yr) skeletons may reflect kinetic effects, which is problematic for
sea surface temperature (SST) reconstruction. Here, we report a Sr/Ca-based SST re...
Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (Arctica islandica) —Comparison of ICP-OES and LA-ICP-MS data
trace elements bivalve shell organics LA-ICP-MS ICP-OES sclerochronology
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2017/8/9
The element chemistry of biogenic carbonates can provide important data on past environments. However, the Sr/Ca and Mg/Ca ratios as well as the Mg and Sr concentrations of biological carbonates, espe...