Acquisition of Single-grain-luminescence-dating Instrument Systems

获得单颗粒发光测年仪器系统

• 批准号: 0619873
• 负责人: Glenn Berger
• 金额: --
• 依托单位: Nevada System of Higher Education, Desert Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0619873&HistoricalAwards=false
• 关键词: Acquisition; Single; grain; luminescence; dating

This Major Research Instrumentation award supports acquisition of two Riso automated instrument systems for microgram and single-grain luminescence sediment dating at the Desert Research Institute (DRI) in Reno, operating the only geochronology laboratory in Nevada. Each of the systems includes a fully automated, micro-focusing, dual-laser, luminescence-stimulation facility and a low-hazard, mini-X-ray generator. The equipment is expected to grow present and support new collaborations among paleoenvironmental scientists, and to provide new opportunities for research training of students, within Nevada (at DRI, at the Nevada Bureau of Mines and Geology, and at the universities in Reno and Las Vegas) and within nearby western states, as well as the region's private geoscience sector. Such scientists and students will be able to collaborate in the use of the equipment for paleoenvironmental studies in fields such as paleoseismology, neotectonics, paleoclimatology, Quaternary geology (including Arctic and Antarctic studies), paleohydrology, geomorphology, geoarcheology, and paleoanthropology. Analyses of stored luminescence from single grains of quartz has been proven to provide accurate burial dates (last exposure to daylight) of grains in several classes of unheated sediments, from as young as a decade to as old as about 200,000 yrs. Thus, this technology can provide accurate timescales of sediment-matrix deposition (hence, of associated preserved environmental conditions) in settings that otherwise have been difficult or impossible to date. Examples of such dating applications include: measuring the time of last use of pre-historic irrigation canals in New Mexico; determining the history of sea-ice coverage in the Arctic Ocean; determining ice-shelf-collapse histories in Antarctica; and providing critical data for addressing state and national earthquake and flood histories.

这项重大研究仪器奖支持在里诺沙漠研究所 (DRI) 购买两台 Riso 自动仪器系统，用于微克和单颗粒发光沉积物测年，该研究所运营着内华达州唯一的地质年代学实验室。每个系统都包括一个全自动、微聚焦、双激光、发光刺激设施和一个低危险的迷你 X 射线发生器。该设备预计将不断发展并支持古环境科学家之间的新合作，并为内华达州（DRI、内华达州矿业和地质局以及里诺和拉斯维加斯的大学）的学生研究培训提供新的机会）以及附近的西部各州以及该地区的私营地球科学部门。这些科学家和学生将能够合作使用这些设备进行古地震学、新构造学、古气候学、第四纪地质学（包括北极和南极研究）、古水文学、地貌学、地质考古学和古人类学等领域的古环境研究。对单个石英颗粒存储的发光进行分析已被证明可以提供几类未加热沉积物中颗粒的准确埋藏日期（最后一次暴露在日光下），从十年到大约 20 万年。因此，这项技术可以提供沉积物基质沉积（因此，相关的保存环境条件）的准确时间尺度，否则很难或不可能确定年代。此类约会应用程序的示例包括：测量新墨西哥州史前灌溉渠最后一次使用的时间；确定北冰洋海冰覆盖的历史；确定南极洲冰架崩塌的历史；并为解决州和国家地震和洪水历史提供关键数据。