Experimental Studies in the Kinetics of Petrologic Processes

9804794沃森有两个主要的推力在这个基础广泛的地壳和上地幔材料的动力学现象的实验研究：矿物的晶格扩散和流体轴承和部分熔融岩石的纹理方面的研究。扩散研究的重点是关键微量元素和放射性同位素（例如，Pb、Sr、稀土元素），以及特定现象，如同位素（质量）对近地表区域（即，最外面的10-100个单层）。结构研究旨在评估界面能最小化在确定流体相在彼此紧密接近的矿物学上不同的单元之间分布的方式中的重要性（即，流体“分配”），并且还有助于理解在少量流体存在下矿物颗粒的粗化行为。最终，人们希望扩散数据将在矿物间同位素和微量元素平衡上施加时间和温度约束，并且纹理信息将帮助岩石学家和地球化学家推断地球深处流体和熔体-岩石相互作用的性质。

9804794WatsonThere are two main thrusts in this broad-based experimental investigation of kinetic phenomena in materials of the Earth's crust and upper mantle: studies of lattice diffusion in minerals and of textural aspects of fluid-bearing and partially-molten rocks. The diffusion studies focus upon intracrystalline transport of key trace elements and radiogenic isotopes (e.g., Pb, Sr, rare earths) in major rock-forming minerals (olivine, pyroxene, garnet), and also upon specific phenomena such as the isotopic (mass) effect on diffusion and diffusion in the near-surface region (i.e., the outermost 10-100 monolayers). The textural studies are aimed at evaluating the importance of interfacial energy minimization in determining the manner in a which a fluid phase is distributed between mineralogically distinct units in close proximity to one another (i.e., fluid "partitioning"), and also at understanding the coarsening behavior of mineral grains in the presence of a small amount of fluid. Ultimately, it is hoped that the diffusion data will place time and temperature constraints on inter-mineral isotopic and trace-element equilibration, and that the textural information will help petrologists and geochemists deduce the nature of fluid- and melt-rock interaction at depth in the Earth.