An Inter-lab Comparison of Mg/Ca & Sr/Ca Measurements in Foraminifera

这份SGER是MG&amp；G项目去年审查的一项提案的产物。对最初提案的评价褒贬不一，由于评价褒贬不一，该提案被拒绝。显然，利用海相碳酸盐微体化石中的镁/钙和锶/钙比值是一种新兴的技术，正越来越多地被用于古海洋学研究中。同样清楚的是，在实验室之间或在某些情况下，实验室内七个实验室对相同或相似材料的结果可能存在重大差异，从而使测量结果的解释复杂化。根据混合的邮件审查和有限的专家小组意见，项目得出结论，需要确定实验室程序和方法的差异是否导致了差异。这一问题需要尽快解决，因为一些调查人员正在开始使用这一新的代理，来自新实验室的数据正在快速生成。因此，该计划邀请国际和平研究所拟定一项适度的SGER建议，以进行实验室间比较，其中包括一些工作人员，他们认为现有实验室正在建立实验室或正在建立实验室，以进行古海洋学的镁/钙和锶/钙测量。当前的SGER对计划请求做出响应。国际和平研究所在文本中纳入了广泛的实验室，并安排了一名中立的调查员来评估文本的结果。

This SGER is an outgrowth of a proposal that was reviewed by the MG&G program last year. Reviews of the initial proposal were mixed and the proposal was declined because of the mixed reviews. It is clear that the use of Mg/Ca and Sr/Ca ratios in marine carbonate microfossils are emerging techniques that are being used more and more in paleoceanography studies. It is also clear that there can be major diferences in results on the same or similar materials between laboratories or in some cases seven within laboratories that complicate the interpretation of the measurements. Based on the mixed mail reviews and limited panel comments, Program concluded that work was need to determine if differences in laboratory procedures and methods were causing the discrepancies. This issue needs to be resolved soon because a number of investigators are starting to use this new proxy and data from the new laboratories are bein generated at a rapid pace. Thus Program invited the PI to develop a modest SGER proposal to run an inter-laboratory comparison that involved a number of workers that existing labs are setting up labs or are setting up labw to do Mg/Ca and Sr/Ca measurements for paleoceanography. The current SGER responds to the Program request. The PI has included a wide range of laboratories in the text and has arranged for a neutral investigator to evaluate the results of the text.