Coordination of the research unit 2125

第2125章 研究单位的协调

• 批准号: 264057058
• 负责人: Professor Dr. Björn Winkler
• 金额: --
• 依托单位: Fachrichtung Mineralogie
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/264057058?language=en
• 关键词: Coordination; research; unit; 2125

The relevance of the proposed research stems from our current lack of knowledge about the structures, properties and behavior of carbonates at high pressures and temperatures. Carbonates are an important part of the deep carbon cycle: the solubility of carbon in dominant mantle phases is relatively low which means that carbon is stored in accessory phases, predominantly carbonates. Quantifying the carbon cycle requires identication of the pathways for carbon exchange as well as the uxes along those pathways.The scientic objectives of the Research Unit are therefore to understand structures and properties of carbonates, and of processes involving carbonates at high pressures and temperatures.Specifically we want to (a) delineate phase boundaries in the system Ca - Mg - Fe - Sr - CO3, (b) observe reactions of carbonates with silicates and oxides, (c) understand the formation of compounds and element partitioning at extreme conditions, (e) clarify structureproperty relations at mantle conditions. In order to reach these scientic objectives, certain methodological developments are required. Specically, we need to complete the development of single crystal diraction studies at extreme conditions, and to continue the development of micro X-ray uorescence at the Extreme Conditions beamline P02.2 at PETRA III (Hamburg), the application of X-ray Raman scattering spectroscopy at high p/T at the Inelastic Scattering beamline P01 of PETRA III, the developments of shock wave experiments in Freiberg and of advanced spectroscopic (second harmonic generation (SHG), time resolved laser uorescence spectroscopy (TRLFS), coherent anti-Stokes Raman spectroscopy (CARS), and synchrotron based FTIR and Terahertz spectroscopy measurements in Frankfurt and Berlin.

拟议研究的相关性源于我们目前对碳酸盐在高压和高温下的结构，性质和行为缺乏了解。碳酸盐岩是深部碳循环的重要组成部分：碳在主导地幔相中的溶解度相对较低，这意味着碳储存在辅助相中，主要是碳酸盐。碳循环的量化需要确定碳交换的途径以及沿着这些途径的使用。因此，研究组的科学目标是了解碳酸盐的结构和性质，以及高温高压下碳酸盐的过程。具体来说，我们想（a）描绘Ca-Mg-Fe-Sr-CO 3系统中的相边界，（B）观察碳酸盐与硅酸盐和氧化物的反应，（c）了解极端条件下化合物的形成和元素的分配，（e）阐明地幔条件下的结构-性质关系。为了达到这些科学目标，需要某些方法的发展。具体而言，我们需要完成极端条件下单晶定向研究的开发，并继续在PETRA III（汉堡）的极端条件光束线P02.2上开发微X射线荧光，在PETRA III的非弹性散射光束线P01上应用高p/T下的X射线拉曼散射光谱，在弗赖贝格的冲击波实验和先进的光谱学的发展（二次谐波产生（SHG）、时间分辨激光荧光光谱（TRLFS）、相干反斯托克斯拉曼光谱（汽车），以及在法兰克福和柏林进行的基于同步加速器的FTIR和太赫兹光谱测量。