RUI: Acquisition of a Stable Isotope Ratio Mass Spectrometer

这笔重大研究仪器(MRI)赠款中的PeckFunds将用于为高露洁大学地质学系购买一台双入口稳定同位素比质谱仪。该仪器将主要用于在线激光氟化分析硅酸盐中的氧同位素比值，以及离线分析燃烧或与酸反应生成的气体。激光氟化是分析难选矿物的氧同位素比值的首选方法，分析时间短(每个样品15-20分钟)，对于小至1毫克的样品，常规精度为/-0.1/mil或更高。高露洁的质谱计将允许地质系进行新的和持续的跨学科研究项目，包括麻粒岩相稳定同位素测温和湿度研究，格伦维尔造山带的构造、岩浆和流体研究，加拉帕戈斯的羽流-山脊相互作用，以及阿拉斯加、纽约和南极洲的古气候研究。所有这项研究都将让高露洁的本科生接触到地球科学中稳定同位素的使用，使他们能够亲身接触到现代仪器。*

0216179PeckFunds from this Major Research Instrumentation (MRI) grant will be used to acquire a dual-inlet stable isotope ratio mass spectrometer for the Department of Geology at Colgate University. The instrument will be used primarily in the analysis of oxygen isotope ratios in silicates by on-line laser fluorination, in addition to analyses of gases prepared by combustion or reaction with acid off-line. Laser fluorination is the method of choice for analysis of refractory mineral separates for oxygen isotope ratio, has short analysis times (15-20 minutes per sample), and yields routine precisions of +/-0.1 per mil or better for samples as small as 1 mg. A mass spectrometer at Colgate will allow new and continuing interdisciplinary research projects in the Geology Department, including studies of granulite facies stable isotope thermometry and hygrometry, tectonic, magmatic, and fluid studies of the Grenville orogen, plume-ridge interaction in the Galapagos, and studies of paleoclimate in Alaska, New York, and Antarctica. All of this research will expose undergraduate students at Colgate to the use of stable isotopes in the geosciences, allowing hands-on exposure to modern instrumentation.***