Isotopic and Trace Element Studies of Igneous and Hydrothermal Processes

9508139 Halliday该小组参与了利用放射性同位素和微量元素地球化学研究火成岩和热液过程的研究。 他们建议应用新的年代学技术，包括硫化物的In-Sn和Rb-Sr直接定年，40 Ar/39 Ar定年，用激光烧蚀和ICP磁扇形多接收器质谱仪对0.1mg粘土样品进行分离和定年（等离子体54）确定地壳流体流动产物的年代，并测试目前的水文模型和其他矿床成因模型。 这项短期拨款的目的，是让这项工作维持在最低水平，以便日后寻求更长远和更庞大的拨款。

9508139 Halliday This group is involved in research using radiogenic isotope and trace element geochemistry to study igneous and hydrothermal processes. They propose to apply new geochronological techniques including In-Sn and Rb-Sr direct dating of sulfides, 40Ar/39Ar dating , 0.1mg sized clay separates and dating of high U/Pb hydrothermal and diagenetic minerals using laser ablation and an ICP magnetic sector multiple collector mass spectrometer (Plasma 54) to date the products of crustal fluid flow and test current hydrologic and other models for the genesis of mineral deposits. this grant, for a short period of time, is to keep this work going at a minimal level while longer term and more substantial funding is sought.