Continued development and application of 40Ar/39Ar dating for archaeometric research

40Ar/39Ar测年法在考古研究中的持续开发和应用

• 批准号: 1322017
• 负责人: Alan Deino
• 金额: $ 19.6万
• 依托单位: Berkeley Geochronology Center
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1322017&HistoricalAwards=false
• 关键词: Continued; development; application; 40Ar; 39Ar

With National Science Foundation support, Drs. Alan Deino and Paul Renne will initiate a three-year effort to upgrade the 40Ar/39Ar dating facilities at the Berkeley Geochronology Center in Berkeley, California. The 40Ar/39Ar dating method has the broadest temporal range of applicability in archeological and paleoanthropological contexts, and is well established as a highly accurate and precise dating tool that has contributed widely to the study of hominid and hominoid evolution. The planned upgrades will ensure that the Archaeometric community has access to a laboratory exercising the best possible practices in this advanced and powerful dating technique, in order to attain the highest possible levels of precision, accuracy and throughput. The improvements will be in the areas of sample processing and extraction methods for removing argon from samples during analysis. Such advances will permit accurate analysis of difficult materials such as those that are low in potassium, very young, very small, or in the areas of mitigation of certain types of natural geological contamination, thus expanding the scope of problems that can be solved.In order to address these goals over the next three years, expenditures will be focused primarily in three areas: 1) Outfitting of a dedicated laboratory for 40Ar/39Ar sample preparation. The anticipated benefits to Archaeometry are in the area of clean and efficient processing of volume-limited or otherwise difficult samples in a controlled environment with minimal possibility of sample contamination, 2) Construction of a CO2 scanning laser system for better heating control for sample degassing, with the anticipated benefit of improved age resolution and greater accuracy in dating young, small, or low-K samples by enhancing sensitivity and uniformity in the heating process, and 3) NSF funding will also help BGC conduct routine maintenance and the purchase of consumables.Broader impacts of this study are anticipated in three areas: (1) Interdisciplinary stimulus. The research studies enabled by this grant are intrinsically interdisciplinary and foster improved interaction between geological, archaeological, and paleoanthropological scientists; (2) Public outreach. The archaeometric age data produced by BGC are frequently published in high-profile journals that are covered by lay news media, hence receiving broad public dissemination in newspapers, magazines, radio, television, and increasingly, the web; (3) Training early career scientists. Graduate students and postdoctoral fellows, many of whom will continue archaeometric research in the future, will receive direct training in the use of the dating facilities, poised to represent the next generation of 40Ar/39Ar geochronologists. Many other graduate students and postdoctoral fellows will receive archaeometric data in direct support of their field studies.

在国家科学基金会的支持下，博士。艾伦·迪诺（Alan Deino）和保罗·雷恩（Paul Renne）将在加利福尼亚州伯克利（Berkeley）的伯克利（Berkeley）地球人工学中心升级40AR/39AR约会设施进行三年努力。 40AR/39AR约会方法在考古和古人类学环境中具有最广泛的适用性时间范围，并且已成为一种高度准确且精确的约会工具，该工具已广泛为人类和诸如人类型进化的研究做出广泛贡献。计划的升级将确保考古社区能够访问该实验室，该实验室在这种高级且强大的约会技术中的最佳实践，以达到最高水平的精度，准确性和吞吐量。这些改进将是在分析过程中从样品中去除样品的样品处理和提取方法的领域。这些进步将允许对困难的材料进行准确分析，例如低钾，非常年轻，很小或在缓解某些类型的自然地质污染的领域，从而扩大了可以解决的问题的范围。为了在未来三年内解决这些目标，将主要集中在三个领域中：1）供应40套工具的塑造，以进行40次塑造的工具。 The anticipated benefits to Archaeometry are in the area of​​ clean and efficient processing of volume-limited or otherwise difficult samples in a controlled environment with minimal possibility of sample contamination, 2) Construction of a CO2 scanning laser system for better heating control for sample degassing, with the anticipated benefit of improved age resolution and greater accuracy in dating young, small, or low-K samples by enhancing sensitivity and uniformity in the heating process, and 3）NSF资金还将有助于BGC进行常规维护和购买消耗品。该研究的影响力将在三个领域产生：（1）跨学科刺激。这项赠款实现的研究是本质上的跨学科，并促进了地质，考古和古人类学科学家之间的相互作用。 （2）公共宣传。 BGC生产的考古年龄数据经常在备受瞩目的期刊上发表，这些期刊被外行新闻媒体涵盖，因此在报纸，杂志，广播，电视以及越来越多的网络中获得广泛的公共传播。 （3）培训早期职业科学家。研究生和博士后研究员将来将继续进行考古研究，他们将在使用约会设施方面接受直接培训，并有望代表下一代40AR/39AR地球人学家。许多其他研究生和博士后研究员将收到考古数据，以直接支持其现场研究。