Acquisition of a New XRF Machine

9628440 Carmichael这笔赠款提供124,800美元，作为购置具有波长色散检测的X射线荧光光谱仪的部分费用，以扩大可检测的元素范围，并为地质样本的主要、次要和痕量元素分析提供较低的检测下限，而不是其现有的分析能力，该光谱仪配备的能量色散光谱仪因使用时间长而不再有更换部件的库存。这一新的XRF将使该团队能够继续他们在广泛的跨学科领域的高质量积极研究计划，包括火成岩岩石学、经济地质学、结晶学和考古学。具体研究项目将包括：对墨西哥西部哈利斯科地块内喷发的熔岩进行地球化学表征，以此作为这一大陆地壳构造独立区段的岩石成因指标；进行土壤成因和地表地球化学研究，以此作为古气候指标；并对侵入和喷出的火成岩样品进行主要、次要和微量元素的地球化学表征，还将对这些样品进行同位素分析。***

9628440 Carmichael This grant provides $124,800 as partial support of the costs of acquiring an X-ray fluorescence (XRF) spectrometer with wavelength dispersive (WDS) detection to increase both the range of elements detectable and to provide lower detection limits for major, minor and trace elemental analyses of geological samples over the present analytical capabilities of their XRF equipped with an energy dispersive spectrometer (EDS) which is suffering from prolonged use and for which replacement parts are no longer kept in stock. This new XRF will allow this group to continue their high quality active research program in a wide range of interdisciplinary areas including igneous petrology, economic geology, crystallography and archaeology. Specific research projects will include the geochemical characterization of erupted lavas within the Jalisco Block of Western Mexico as petrogenetic indicators in this tectonically independent segment of continental crust, pedogenic and surficial geochemical studies as indicators of paleoclimates and for characterization of the major, minor and trace element geochemistry of intrusive and extrusive igneous samples for which isotopic analyses will also be conducted. ***