Acquisition of a New XRF Machine

9628440卡迈克尔 这笔赠款提供了124，800美元，作为购买具有波长色散（WDS）检测的X射线荧光（XRF）光谱仪的部分支持，以增加可检测元素的范围并为主要元素提供较低的检测限，地质样品的微量元素和痕量元素分析超过了其配备能量色散光谱仪的XRF的现有分析能力（EDS），该设备长期使用，更换部件已无库存。 这种新的XRF将使该小组能够继续在广泛的跨学科领域进行高质量的积极研究计划，包括火成岩岩石学，经济地质学，晶体学和考古学。 具体的研究项目将包括：对墨西哥西部哈利斯科区块内喷发熔岩的地球化学特征进行研究，作为大陆地壳这一独立于构造的部分的岩石成因指标;对成土和表层沉积物进行地球化学研究，作为古气候的指标，侵入和喷出岩浆岩样品的微量和微量元素地球化学，并将对其进行同位素分析。 ***

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. ***