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

0521322布朗这项重大研究仪器(MRI)计划拨款支持购买一台配备彩色CCD线扫描相机的高分辨率X射线荧光(XRF)岩心扫描仪，用于明尼苏达大学德卢斯分校大湖观测站(LLO)的古湖泊和古气候研究。Avaatech XRF岩心扫描仪将促进PI和学生需要快速、无损、高空间分辨率(~1 mm)和高灵敏度确定沉积物岩心中主要、次要和痕量元素浓度的研究。XRF扫描仪将为气候和环境变化的湖泊沉积记录的研究提供新的进展，分辨率从年到十年。对从东非裂谷湖泊、美国-加拿大五大湖以及亚洲和南美大陆内陆的大型湖泊中恢复的沉积物进行高分辨率研究将立即受益。来自世界各地(例如，大盐湖、熊湖、喀喀湖、马拉维湖和博苏姆特维湖)的大量社区可访问的、长期和连续的湖泊沉积记录被存档在附近明尼阿波利斯的LacCore国家湖泊核心储存库。LLO XRF岩心扫描仪将提供给更大的古湖泊社区，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. ***