Laser-Ablation Inductively-Coupled-Plasma Mass-Spectrometer

激光烧蚀电感耦合等离子体质谱（LA-ICP MS）是一种新兴的、多功能的固体材料中元素和同位素浓度的空间微区分析工具。地质物质中微量元素的浓度提供了关于其来源或出处、其形成过程中的物理和化学条件或任何随后的质量迁移过程的信息。这种方法反过来又是必不可少的，我们了解当地和全球的地球化学循环及其时间尺度。我们的研究计划结合了实验和现场导向的方法，以及岩浆和热液过程的平衡和动力学建模。在实验上，我们专注于矿物的稳定性，溶解度和平衡或动力学过程中的元素分配，如岩浆系统中的晶体成核和生长。在野外定向研究中，我们采用矿物平衡来重建岩浆-热液转换和物质输运的复杂过程，并将流体聚焦作为热液和成矿系统中元素分散或聚集的控制。我们将使用天然矿物和实验材料中的痕量组分，通过LA ICP MS分析，以提高我们对它们的掺入机制和饱和极限的理解，并为固体中非常稀的（Henrian）痕量组分开发新的热力学模型和数据。这种方法将开辟新的途径耦合解释或预测建模的宏观相平衡与主机特定的微量元素分布和/或质量输运地质系统。

Laser-ablation inductively-coupled-plasma mass-spectrometry (LA ICP MS) is an emerging and versatile tool for spatial microanalysis of elemental and isotopic concentrations in solid materials. The concentrations of trace elements in geological materials provide information on their source or provenance, physical and chemical conditions during their formation or any subsequent mass-transport processes. This approach is in turn essential for our understanding of local and global geochemical cycles and their time scales. Our research program combines experimental and field-oriented approaches together with equilibrium and kinetic modeling of magmatic and hydrothermal processes. Experimentally, we concentrate on mineral stabilities, solubilities and element partitioning during equilibrium or kinetic processes such as crystal nucleation and growth in magmatic systems. In the field-oriented studies we employ mineral equilibria to reconstruct complex processes of magmatic-hydrothermal transition and mass transport, and fluid focusing as control of element dispersal or accumulation in hydrothermal and ore-forming systems. We will use trace components in natural minerals and experimental materials, analyzed by LA ICP MS, to improve our understanding of their incorporation mechanisms and saturation limits and develop new thermodynamic models and data for very dilute (Henrian) trace components in solids. This approach will open new avenues for coupled interpretative or predictive modeling of macroscopic phase equilibria with host-specific trace element distribution and/or mass transport in geological systems.