EAR-PF: Nanochronology and Moho Topography: Towards Precise and Accurate Constraints on the Evolution of North American Continental Lithosphere

Gregory Dumond博士被授予NSF地球科学博士后奖学金，在麻省理工学院开展一项研究和教育计划。例如，杜蒙德博士将开发一种技术，通过测量锆石和独居石中的铀和铅同位素来确定矿物颗粒不同部分的年龄。杜蒙德博士将使用聚焦离子束采集微米大小的矿物颗粒样本，然后使用热电离质谱计确定同位素组成。这一新方法将使科学家能够量化精确物质中矿物颗粒不同部分的年龄，将矿物生长时期与地球深处的地质条件和过程联系起来--S。此外，杜蒙博士将与处于不同职业生涯阶段的研究生密切合作。他将主持关于大陆化学演化和用于研究这种演化的工具(例如，同位素和计算机模型)的研究生级别的研讨会和课程。

Dr. Gregory Dumond is awarded an NSF Earth Science Postdoctoral Fellowship to carry out a program of research and education at the Massachusetts Institute of Technology. Dr. Dumond will develop a technique to determine the age of different sections of a mineral grain by measuring uranium and lead isotopes in zircons and monazites, for example. Dr. Dumond will take micrometer size samples of mineral grains using a focused ion beam and then he will determine the isotope composition using a thermal ionization mass spectrometer. The new method will allow scientists to quantify the age of different sections of the mineral grains in a precise matter to link mineral growth episodes to geologic conditions and processes deep within the earth?s crust.In addition, Dr. Dumond will be work closely with graduate students at different stages of their career. He will lead graduate level seminars and classes on the chemical evolution of continents and on tools that are used to study this evolution (e.g. isotopes and computer models).