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

该SGER是去年MG&amp；G计划审查的一项提案的产物。对最初提案的评论褒贬不一，因此提案被拒绝了。显然，在海洋碳酸盐微化石中使用Mg/Ca和Sr/Ca比值是一种新兴的技术，在古海洋学研究中得到越来越多的应用。同样清楚的是，在不同的实验室之间，或者在某些情况下，在实验室内部，对相同或类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。根据混杂的邮件评论和有限的专家组意见，Program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，因为许多研究人员正在开始使用这种新的代理，而且来自新实验室的数据正在快速生成。因此，Program邀请PI提出一个适度的SGER建议，进行一个实验室间的比较，涉及一些现有实验室正在建立的实验室或正在建立的实验室，以进行古海洋学的Mg/Ca和Sr/Ca测量。当前的SGER响应程序请求。PI在文本中包括了广泛的实验室，并安排了一位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.