SGER: Re-1870s/1860s and Platinum Group Element Characteristics of Oceanic Crust and Mantle: Improving Detection Limits by ICP-MS-ID

该提案要求提供资金，以开发海洋岩石中超痕量（低至1 012份中的1份）铂族元素（Ir、Os、Ru、Rh、Pt和Pd）的分析技术。 在超痕量水平上对大洋岩石中铂族元素进行准确和精确测量的能力对于完善地幔演化、地幔氧化状态、俯冲带地壳再循环和其他一级过程的模型至关重要。 这一领域的进一步进展要求改进实验室技术，以降低元素检测限，在某些情况下，低于1/1012份。 最近仪器的改进使这些超微量元素的测量在原则上成为可能，但相关实验室技术需要进行重大改进，例如主要研究者提出的改进，以便使这些测量变得实用。

This proposal requests funds to develop analytical techniques for the platinum group elements (Ir, Os, Ru, Rh, Pt, and Pd) in oceanic rocks at ultra-trace (as low as one part per 1012 parts) levels. The ability to make accurate and precise measurements of the platinum group elements in oceanic rocks at the ultra-trace level is critical in order to refine models for mantle evolution, mantle oxidation state, crustal recycling at subduction zones, and other first-order processes. Further progress in this field requires that laboratory techniques be improved to lower the elemental detection limits to, in some cases, below one part in 1012 parts. Recent improvements in instrumentation have made these ultra-trace element measurements possible in principle, but significant refinements such as those proposed by the principal investigator are needed in the associated laboratory techniques in order to make these measurements practical.