High-pressure high temperature 57Fe Mössbauer spectroscopy in laser-heated diamond anvil cells: Applications for the mineralogy of Earths´s lower mantle and core

激光加热金刚石砧室中的高压高温 57Fe 穆斯堡尔光谱：在地球下地幔和地核矿物学中的应用

• 批准号: 24797886
• 负责人: Privatdozentin Dr. Catherine McCammon
• 金额: --
• 依托单位: Bayerisches Forschungsinstitut für Experimentelle Geochemie und Geophysik (BGI)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/24797886?language=en
• 关键词: pressure; temperature; 57Fe; ssbauer; spectroscopy

Earth scientists have always been directly concerned with the identity and properties of materials that constitute the Earth. However, as we explore deeper regions of the planet with increasingly sophisticated remote-sensing technology and interpret its history in greater detail for scientific understanding of its mineral and energy resources, it becomes clearer than ever that we must exploit technological advances in high-pressure research to enable in situ studies, with the goal of a full-scale characterisation of the physical and chemical properties of Earth materials at extreme pressures and temperatures. Mössbauer spectroscopy is a powerful tool for such studies, but so far its potential for high pressure and temperature applications has not been exploited. The aim of the proposed project is to design, assemble, commission and make operational a laser heating facility optimised to operate in situ with in-house Mössbauer spectroscopy facilities, which will then be used to study the structures (crystallographic, magnetic, and electronic), phase relations, and chemical reactions of iron-containing Earth materials (ferropericlase, aluminium-bearing magnesium-silicate perovskite and post-perovskite, iron-nickel alloys) at conditions of the Earth¿s lower mantle and core.

地球科学家一直直接关注构成地球的材料的特性和性质。然而，随着我们利用日益复杂的遥感技术探索地球的更深层区域，并更详细地解释其历史，以科学地了解其矿物和能源资源，我们必须利用高压研究中的技术进步来实现原位研究，目标是在极端压力和温度下全面表征地球材料的物理和化学特性，这一点变得比以往任何时候都更加清楚。Mössbauer光谱学是这类研究的有力工具，但到目前为止，它在高压和高温应用方面的潜力尚未得到开发。拟议项目的目的是设计、组装、调试和运行一个激光加热设备，该设备经过内部Mössbauer光谱设备的优化，可在现场运行，然后将用于研究含铁土材料（铁方石、含铝镁硅酸盐钙钛矿和后钙钛矿）的结构（晶体学、磁性和电子）、相关系和化学反应。铁镍合金)在地球的下地幔和地核的条件下。