Multiple Collector Thermal Ionization Mass Spectrometer

该合同提供了购买多收集器热电离源质谱仪所需资金的一半，该质谱仪将在莱斯大学地质和地球物理系安装和运行。该大学承诺提供购置该设备所需的剩余资金。该仪器将用于铅、锶、钕和硼同位素的放射成因和稳定同位素分析，以及涉及锆石、独居石和辉石等矿物的高精度铀-铅系地质年代学。分析结果将用于解释美国西部科迪勒拉省的构造演化。硼同位素研究将被应用于火山弧过程的研究，特别是研究弧状岩浆中硼的特征富集性及其对俯冲带沉积物再循环的意义。

This award provides one-half the funds required to purchase a multiple collector thermal ionization source mass spectrometer that will be installed and operated in the Department of Geology and Geophysics at Rice University. The University is committed to providing the remaining funds required for the acquisition of this equipment. The instrument will be used for radiogenic and stable isotope analyses of lead, strontium, neodymium and boron isotopes and for high-precision uranium-lead system geochronology involving minerals such as zircon, monazite and sphene. The analytical results will be applied to the interpretation of the tectonic evolution of the western U.S. cordillera province. The boron isotope studies will be applied to the study of volcanic arc processes, in particular to investigate characteristic boron enrichment in arc magmas and its implications for sediment recycling in subduction zones.