Ostracode-Shell Luminescence Dating for Quaternary Deposits

第四纪沉积物介壳壳发光测年

基本信息

批准号：
0087827
负责人：
Glenn Berger
金额：
$ 14.05万
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：
2001
资助国家：
美国
起止时间：
2001-03-01 至 2007-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0087827&HistoricalAwards=false
关键词：
Ostracode Shell Luminescence Dating Quaternary

项目摘要

ABSTRACTOSTRACODE-SHELL LUMINESCENCE DATING FOR QUATERNARY DEPOSITSThis proposal intends to build on preliminary feasibility tests, to develop a new luminescence clock for the direct dating of an important Quatemary paleoenvironmental proxy indicator: ostracode shells. Non-marine ostracode shells serve as proxy indicators of paleoenvironmental conditions in lakes, ponds, springs and streams. Presently these shells can be dated directly by radiocarbon methods, but a means to date them directly when older than 35-40 ka would provide opportunities for new discoveries in the worldwide effort to reconstruct details of paleoenvironmental histories from continental sedimentary records.Preliminary work by the PI indicates that ostracode shells have some desired luminescence properties. However, refined sample preparation protocols suitable for luminescence dating need to be developed, and almost nothing is known of their likely useful age range. Natural samples of ostracode shells will be collected from independently well-dated (by 14C) lacustrine beds (late Pleistocene age) from the lake Bonneville Basin (northwestern Utah) and from Mono Lake (eastem Califomia). The foundations for reliable luminescence dating protocols will be established. These protocols will then be applied to one or two samples older than ca. I00 ka, to extrapolate from the developmental tests. This research will form the basis of a graduate student's thesis project.

第四纪沉积物的摘要Ostracode-shell发光日期这一建议旨在基于初步可行性测试，以开发新的发光时钟，以直接对重要的Quatemary Quatemary Palecormary Virconmental Vormental Tocy指标进行直接约会。非海洋的Ostracode壳是湖泊，池塘，弹簧和溪流中古环境条件的替代指标。目前，这些贝壳可以通过放射性碳方法直接定位，但是在35-40 ka大于35-40 ka时，可以直接延续它们，这将在全球范围内为新发现提供机会，以重建来自大陆沉积记录的古环境历史的详细信息。PII指标的质量壳具有一些所需的亮度效果。但是，需要开发适合发光约会的精制样品制备方案，几乎没有任何可能有用的年龄范围。 Ostracode贝壳的天然样品将从独立良好的（按14C）湖间层（14C）湖床（更新世晚期）和Bonneville湖盆地（犹他州西北部）和Mono Lake（Eastem Califomia）收集。将建立可靠的发光约会方案的基础。然后，这些协议将应用于比CA大的一个或两个样本。 i00 ka，从发育测试中推断出来。这项研究将构成研究生论文项目的基础。