Arid
项目编号9809354
Improving the Precision and Extending the Age Range of Luminescence Dating of Pleistocene Sediment
Glenn Berger
主持机构Nevada System of Higher Education, Desert Research Institute
开始日期1998-08-15
结束日期2007-01-31
资助经费151711(USD)
项目类别Continuing Grant
资助机构US-NSF(美国国家科学基金会)
项目所属计划PALEOCLIMATE PROGRAM, GLOBAL CHANGE, ARCTIC SYSTEM SCIENCE PROGRAM
语种英语
国家美国
英文简介9809354 Berger There is a dearth of accurate and precise numeric dating techniques for Pleistocene terrestrial sediment older than 40-50 ka, the usual limit of radiocarbon dating. Luminescence dating methods for unheated sediment have the potential (based on kinetics studies) to directly date detrital- feldspar burial time to well beyond 1 ma, a time period embracing at least half the Pleistocene and therefore many glacial-interglacial cycles. This award supports high- precision measurements on loess samples using the new, more precise, infra-red- stimulated-luminescence (IRSL) dating procedure. Use of this method is expected to improve luminescence- dating precision for loess by more than a factor of two, in the established time range for IRSL dating (<400Ka). Companion termoluminescence (TL) measurements will be made on several samples to validate previous TL results and to improve their precision using more recent TL experimental protocols. Furthermore, both TL and IRSL measurements will be made on new loess samples to be collected from sites in Alaska and the Yukon Territory (Canada). These sites have newly documented independent numerical ages up to 2 Ma, based on paleomagnetic polarity-reversal boundaries and fission track ages of volcanic ash beds. Improved luminescence dating of Pleistocene terrestrial feldspars should benefit global efforts to extract time-series data from much of the Pleistocene land record.
来源学科分类Geosciences
URLhttps://www.nsf.gov/awardsearch/showAward?AWD_ID=9809354
资源类型项目
条目标识符http://119.78.100.177/qdio/handle/2XILL650/342165
推荐引用方式
GB/T 7714
Glenn Berger.Improving the Precision and Extending the Age Range of Luminescence Dating of Pleistocene Sediment.1998.
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