CSEDI Collaborative Research: Experimental Study of Trace-Element Partitioning between the Core and Mantle

CSEDI合作研究：核幔微量元素分配实验研究

• 批准号: 0112484
• 负责人: Raymond Jeanloz
• 金额: $ 13.57万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0112484&HistoricalAwards=false
• 关键词: CSEDI; Collaborative; Research; Experimental; Study

EAR-0112484Jeanloz Shimizu The investigators propose to conduct a 2-year collaborative study between high-pressure experimental geophysicists at the University of California at Berkeley and analytical geochemists at Woods Hole Oceanographic Institution. This research will experimentally evaluate the feasibility and validate the measurement of trace-element partitioning between metal and silicate at the high pressures and temperatures of the Earth's deep mantle and core, ~100 GPa and 4000 K. The possibility of combining the capability of the laser-heated diamond cell, to reproduce conditions of the planetary interior, with that of secondary ion mass spectrometry (SIMS), for measuring isotopic abundances at the ppm level and below on spatial scales of ms, will be evaluated. If successful, these combined tools can be used as a means of resolving major issues in geochemistry and geophysics that depend on understanding the distribution of trace elements within the mantle and core. Such studies are crucial for determining the potential consequences of chemical interactions between the core and mantle over geological time and, more generally, for deciphering the evolution of the Earth's deep interior. The experiments proposed here are intended to help develop methodologies for element-partitioning studies to be pursued in the future.

EAR-0112484Jeanloz Shimizu 研究人员提议在加州大学伯克利分校的高压实验地球物理学家和伍兹霍尔海洋研究所的分析地球化学家之间进行为期 2 年的合作研究。这项研究将通过实验评估在地球深部地幔和地核的高压和高温（约 100 GPa 和 4000 K）下金属和硅酸盐之间微量元素分配的测量的可行性和验证。将激光加热金刚石单元的能力与二次离子质谱 (SIMS) 的能力相结合的可能性，以再现行星内部的条件，以进行测量 将评估毫秒空间尺度上 ppm 级及以下的同位素丰度。 如果成功，这些组合工具可以用作解决地球化学和地球物理学中主要问题的一种手段，这些问题取决于了解地幔和地核内微量元素的分布。 这些研究对于确定地质时期地核和地幔之间化学相互作用的潜在后果至关重要，更广泛地说，对于破译地球深层内部的演化至关重要。 这里提出的实验旨在帮助开发未来进行的元素划分研究的方法。