Acquisition of a High Precision Thermal Ionization Mass Spectrometer for Geochemical Research

同位素地球化学领域对地球科学的广泛研究作出了重要的贡献。仪器的进步是许多研究进步的关键组成部分。该项目包括购买一种新仪器，以促进有助于我们了解深层地球过程、气候变化和地球历史的研究。该仪器的新设计特点将使我们能够更精确地测量Sr， Nd, Os， U， Ca和Fe等元素同位素比率的微小差异。这些微小的同位素变化提供了其他方法无法获得的关于地球过程的重要线索。该仪器将用于生物地球化学、地幔地球化学、玄武岩岩石成因、硅质岩浆系统、花岗岩岩石成因、地壳生长与构造、地质年代学、海洋古化学、地下水和深海孔隙流体地球化学等地球化学研究。预期的研究包括火山岩和地下水中的U和Th同位素，锆石中的Sr同位素，铁同位素以及Os， Se和b等元素的负离子研究。新仪器将取代地球和行星科学系已有14年历史的多收集器仪器。加州大学将为此次收购贡献大约一半的资金。智力优势：PI在同位素地球化学研究方面有27年的经验，有广泛的发表记录，培养了二十多名博士研究生。该所长期以来一直支持设施，并有足够的研究经费确保仪器得到充分利用。更广泛的影响：提议的仪器构成了加州大学伯克利分校研究和教育基础设施的重大改进。在过去的14年里，20名研究生（8名女）、8名博士后（4名女），以及20多名访客、本科生和合作者在将容纳新仪器的设施中进行了研究。这项计划中的研究将通过提高我们对自然灾害和全球气候变化的认识而造福社会

EAR-0236741DePaoloThe field of isotope geochemistry has contributed in important ways to a broad spectrum of studies in Earth Sciences. Advances in instrumentation are a key component of many research advances. This project involves the purchase of a new instrument to facilitate studies that will contribute to our understanding of deep earth processes, climate change, and earth history. The new design features of the instrument will allow us to more precisely measure small differences in isotope ratios for elements like Sr, Nd, Os, U, Ca and Fe. These small isotopic variations provide important clues about earth processes that cannot be obtained by other means. The new instrument will be used for geochemical investigations in biogeochemistry, mantle geochemistry, basalt petrogenesis, silicic magma systems, granite petrogenesis, crustal growth and structure, geochronology, ocean paleochemistry, and groundwater and deep sea pore fluid geochemistry. Anticipated studies include U and Th isotopes in volcanic rocks and groundwaters, Sr isotopes in zircon, Fe isotopes, and negative ion studies for elements like Os, Se and B. The new instrument will replace a 14-year-old multi-collector instrument in the Department of Earth and Planetary Science. The University of California will contribute about half of the funds for the purchase. Intellectual merit: The PI has 27 years of experience in isotope geochemical research, has an extensive record of publication, and has trained more than twenty Ph.D. students. The Institution has a long record of support of facilities, and there is sufficient research funding to ensure the instrumentation will be well used. Broader Impacts: The proposed instrumentation constitutes a significant improvement to the research and educational infrastructure at U.C. Berkeley. In the previous 14 years, 20 graduate students (8 women) 8 postdoctoral fellows (4 women), plus more than 20 visitors, undergraduates and collaborators have pursued research in the facility that will house the new instrument. The planned research will benefit society by improving our knowledge of natural hazards and global climate change.***