Technician Support: EPS-TIMS Facility at Harvard

这笔拨款为哈佛大学负责热电离质谱（TIMS）设施的监督、维护和日常操作的技术人员提供128,493美元的部分工资支持。这是EAR/IF技术支持子项目下的第一阶段技术支持补助金。在哈佛大学TIMS实验室设立这个技术职位将提供必要的仪器监督和维护（哈佛大学有3个TIMS），这将很快增加，因为哈佛大学决定增加一名教员和一名研究助理，分别是罗伯塔·鲁德尼克和保罗·霍夫曼，他们的研究需要使用TIMS进行放射性同位素分析。技术支持也将极大地促进PI对各种主题的研究，包括：基于使用负离子TIMS （N-TIMS）测量铪钨同位素系统的地球吸积和早期历史研究，基于对科马提岩和高mgo玄武岩的钕/钐和铷/锶同位素分析的地幔地球化学研究，使用N-TIMS对玄武岩中的铂族元素（PGE）进行元素分析，U/Pb年代学应用于岩石圈构造和Sr同位素推断古地表过程。＊＊＊

9616072 Jacobsen This grant provides $128,493 as partial salary support for a technician responsible for oversight, maintenance and daily operation of the thermal ionization mass spectrometry (TIMS) facility at Harvard University. This is a Phase I technician support grant under the EAR/IF technician support sub-program. Establishment of this technical position at the Harvard TIMS lab will provide needed instrumental oversight and maintenance (there are 3 TIMS at Harvard) which will soon increase as the result of Harvard's decision to add an additional faculty member and a research associate, Roberta Rudnick and Paul Hoffman, respectively, whose research requires the use of TIMS for radiogenic isotopic analyses. Technical support will also greatly facilitate the PI's research on a variety of topics including, studies of the accretion and early history of the Earth based on measurement of the Hafnium-Tungsten isotopic system using negative ion TIMS (N-TIMS), studies of mantle geochemistry based on Neodymium/Samarium and Rubidium/Strontium isotopic analyses of Komatiites and high-MgO basalts, elemental analyses of the Platinum group elements (PGE) in basalts using N-TIMS, U/Pb geochronology as applied to lithospheric tectonics and use of Sr isotopes to infer paleo-surface processes. ***