Acquisition of an X-Ray Fluorescence Scanner for Paleolimnological Studies at the Large Lakes Observatory

这项主要研究仪器（MRI）计划资助购买一台高分辨率x射线荧光（XRF）核心扫描仪，该扫描仪配备了一台彩色CCD线扫描相机，用于明尼苏达大学德卢斯大湖天文台（LLO）的古湖泊学和古气候学研究。Avaatech XRF岩心扫描仪将有助于PI和学生进行需要快速、无损、高空间分辨率（~1mm）和高灵敏度的沉积物岩心中主要、次要和微量元素浓度测定的研究。XRF扫描仪将为湖泊沉积记录的气候和环境变化的研究提供新的进展，以年至年代际分辨率。对东非裂谷湖、美国-加拿大五大湖以及亚洲和南美大陆内部的大型湖泊回收的沉积物进行高分辨率研究将立即受益。来自世界各地的湖泊沉积记录（如大盐湖、熊湖、的的喀喀湖、马拉威湖和即将到来的博萨姆特维湖）被存档在明尼阿波利斯附近的拉科国家湖泊核心库中。LLO XRF岩心扫描仪将提供给更大的古湖泊学社区，用于研究这些和其他湖泊沉积物。＊＊＊

0521322BrownThis Major Research Instrumentation (MRI) Program grant supports acquisition of an high resolution x-ray fluorescence (XRF) core scanner equipped with a color CCD line scanning camera for paleolimnological and paleoclimatological investigations at the Large Lakes Observatory (LLO), University of Minnesota - Duluth. An Avaatech XRF Core scanner will facilitate PI and students research requiring rapid, non-destructive, high spatial resolution (~1mm) and high sensitivity determination of the concentration of major, minor and trace elements in sediment cores. The XRF scanner will offer new advances for studies of lacustrine sedimentary records of climate and environmental change with annual to decadal resolution. High resolution studies of sediments recovered from East African Rift lakes, the U.S.-Canadian Great Lakes, and large lakes within the Asian and South American continental interiors will immediately benefit. A wealth of community-accessible, long, and continuous lacustrine sedimentary records from around the world (e.g., Great Salt Lake, Bear Lake, Lake Titicaca, Lake Malawi and soon Bosumtwi) are archived at the LacCore national lake core repository in nearby Minneapolis. The LLO XRF core scanner will be made available to the larger paleolimnological community for study of these and other lake sediments. ***