Acquistion of a Multicollector Mass Spectrometer

9526269 Patchett这笔赠款为购买具有多个收集器和离子计数能力的新型热电离质谱仪(TIMS)提供部分支持，该仪器将用于亚利桑那大学地球科学系的同位素研究。具体地说，新的TIMS将补充1983年完全用亚利桑那大学的资金购买的现有VG-354TIMS，目前已被超额认购，并开始出现退化，特别是在锶同位素比率的测量方面。因此，旧的TIMS将主要用于构造和地壳成因研究中的U-Pb、Lu-Hf和Sm-Nd同位素分析，而新的TIMS将主要用于喜马拉雅构造研究中利用锶同位素的研究，以及利用湖相碳酸盐中的87Sr/86Sr作为古湖级别的替代。***

9526269 Patchett This grant provide partial support of the costs of acquiring a new thermal ionization mass spectrometer (TIMS) with multiple collectors and ion counting capabilities which will used for isotopic research at the University of Arizona's Department of Geosciences. Specifically, the new TIMS will complement an existing VG-354 TIMS purchased entirely with University of Arizona funds in 1983 that is presently oversubscribed and is beginning to show degradation, particularly with regard to measurements of Strontium isotope ratios. Thus the older TIMS will be used primarily for analyses of U-Pb, Lu-Hf and Sm-Nd isotopes in studies of tectonics and crustal genesis while the new TIMS would be largely used for research utilizing Sr isotopes in studies of Himalayan tectonics and the use of 87Sr/86Sr in lacustrine carbonates as a proxy for paleolake levels. ***