Slab-Related and Volatile-Bearing Phases and the Core's Light Alloying Component: Constraints on the Physical and Chemical Properties of the Deep Earth

板片相关相和挥发性相以及地核的轻合金成分：对地球深部物理和化学性质的约束

• 批准号: 9805460
• 负责人: Elise Knittle
• 金额: $ 14.98万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9805460&HistoricalAwards=false
• 关键词: Slab; Related; Volatile; Bearing; Phases

9805460Knittle The PIs propose to conduct a range of high-pressure experimental studies designed to constrain the bonding, structures, elasticity and chemical compositions of a suite of materials relevant to both the Earth's volatile budget and subduction processes. Specifically, they plan to focus on three distinct, but complementary topics: 1) the manner in which water is retained at high pressures in hydrous phases likely to predominate within subduction zones within the Earth's upper mantle; 2) continue studies of the densities of anhydrous high pressure phases of oceanic crust with a goal toward understanding how the density differences which drive the subduction process have evolved since the Archean, and 3) measure the equations of state of a range of iron alloys at high pressure (and following heating), with the primary focus being to constrain the pressure derivatives of their bulk modulus, a parameter which the PIs have shown to be virtually the only discriminant which provides a geophysical constraint on core chemistry.

9805460 Knittle PI建议进行一系列高压实验研究，旨在限制与地球挥发性预算和俯冲过程相关的一套材料的结合，结构，弹性和化学成分。 具体来说，他们计划集中在三个不同的，但互补的主题：1）水是如何保持在高压下的含水相可能占主导地位的俯冲带内地球的上地幔;（二）继续研究大洋地壳无水高压相的密度，目的是了解自1970年以来驱动俯冲过程的密度差异是如何演变的。太古代，和3）测量状态方程的范围内的铁合金在高压（和以下加热），主要重点是约束的压力衍生物的体积模量，一个参数的PI已被证明是几乎唯一的判别提供了地球物理约束的核心化学。