Technician Support (Phase II): Isotope Geochemistry at Lehigh University

9727589这笔补助金为利哈伊大学的稳定同位素/稀有气体质量谱学实验室技术员提供两年的部分工资支持。这是仪器和设施(IF)计划下的第二阶段技术人员支持赠款，并遵循为期三年的第一阶段支持(EAR-9406135)。利哈伊大学的同位素地球化学技术员Bruce Idleman博士分别在Peter Zeitler博士和Gray Bebout博士的指导下为40Ar/39Ar年代学实验室和稳定同位素地球化学实验室提供支持。在第一阶段的支持下，Idleman博士为40Ar/39Ar测年样品的分步加热和直接激光烧蚀提供了一种新的激光系统，并建造了一条用于制备氮同位素分析样品的新型提取线。因此，这些实验室提供了一些独特的分析方法，包括长石热年代学和从火成岩阶段提取的氮的氮同位素分析，现在社区外部成员可以使用这些方法。继续支持这一技术职位将有助于利用这些新开发的地质年代学和稳定同位素技术扩大与外部调查人员的合作，并将支持内部关于构造、流体/地壳相互作用、火成岩成因和地壳热演化的研究。***

9727589 Bebout This grant provides two-years partial salary support for the stable isotope/Noble gas mass spectroscopy laboratory technician at Lehigh University. This is a Phase II technician support grant under the Instrumentation and Facilities (IF) Program and follows three years of Phase I support (EAR-9406135). The isotope geochemistry technician at Lehigh University, Dr. Bruce Idleman, provides support for both the 40Ar/39Ar geochronology lab and the stable isotope geochemistry lab under the directions of Dr. Peter Zeitler and Dr. Gray Bebout, respectively. Under Phase I support, Dr. Idleman brought on-line a new laser system for both step-wise heating and direct laser ablation of samples for 40Ar/39Ar dating and has constructed a novel extraction line for preparing samples for nitrogen isotopic analysis. As a result, these labs offer some unique analytical methodologies including feldspar thermochronology and nitrogen isotopic analyses of N2 extracted from igneous phases that are now available to outside members of the community. Continued support of this technical position will allow for expanded collaborative work with outside investigators using these newly developed geochronologic and stable isotopic techniques and will support inhouse research in tectonics, fluid/crust interactions, igneous petrogenesis and thermal evolution of the crust. ***