Petrologic and Geochemical Study of Leucogranite Generation: The Black Hills, South Dakota

小行星9417979 该奖项将支持一个全面的地球化学和岩石学研究的一代过铝质浅色花岗岩的重点是前寒武纪的火山岩在黑山，南达科他州。 由于该地区的岩石学和地球化学关系与世界上其他过铝质浅色花岗岩类相似，因此研究结果将有助于更好地了解一般过铝质花岗岩的生成。 分析工作将包括副相分布的扫描电镜和X射线图象分析、全岩和矿物分离物的主要和微量元素分析、用电子显微探针分析矿物、全岩和矿物的氧同位素分析以及可能的流体包裹体的ICP-MS分析。 这些数据将根据已发表的花岗岩生成的实验研究以及地壳熔融期间微量元素和同位素行为的理论进行解释。

9417979 Nabelek This award will support a comprehensive geochemical and petrologic study of the generation of peraluminous leucogranites with focus on the Precambrian terrane in the Black Hills, South Dakota. Because petrological and geochemical relationships in the area are similar to other peraluminous leucogranite suires worldwide, the results from the study will result in a better understanding of perlauminous granite generation in general. The analytical work will include SEM and X-ray image analysis of the distribution of accessory phases, analysis of whole rocks and mineral separates for major and trace elements, analysis of minerals by electron microprobe, oxygen isotope analyses of whole rocks and minerals and possibly ICP-MS analysis of fluid inclusions. The data will be interpreted in view of published experimental studies of granite generation and theory of trace elements and isotopic behavior during crustal melting.