Laser-Ablation Inductively-Coupled-Plasma Mass-Spectrometer

激光烧蚀电感耦合等离子体质谱(LA-ICPMS)是一种新兴的空间微量分析固体材料中元素和同位素浓度的通用工具。地质材料中的微量元素浓度提供了有关其来源或来源、形成过程中的物理和化学条件或任何随后的质量传输过程的信息。反过来，这种方法对于我们理解当地和全球的地球化学循环及其时间尺度是至关重要的。我们的研究计划将实验和面向野外的方法与岩浆和热液过程的平衡和动力学建模结合在一起。在实验上，我们集中在平衡或动力学过程中的矿物稳定性、溶解度和元素分配，如岩浆系统中的晶体成核和生长。在野外研究中，我们利用矿物平衡来重建岩浆-热液转换和物质迁移的复杂过程，并利用流体聚焦控制热液和成矿系统中元素的扩散或聚集。我们将利用LA-ICPMS分析的天然矿物和实验材料中的痕量组分，以加深我们对它们的结合机理和饱和极限的理解，并开发新的热力学模型和固体中极稀(Henrian)痕量组分的数据。这一方法将为宏观相平衡与宿主特定的微量元素分布和/或地质系统中的质量传输耦合的解释性或预测性建模开辟新的途径。

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.