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: 0715465
• 负责人: Alan Deino
• 金额: $ 27万
• 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: 2007
• 资助国家: 美国
• 起止时间: 2007-08-15 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0715465&HistoricalAwards=false
• 关键词: Continued; development; application; 40Ar; 39Ar

With National Science Foundation support, Drs. Alan Deino and Paul Renne will embark on a three-year effort to upgrade the 40Ar/39Ar dating facilities at the Berkeley Geochronology Center in Berkeley, California, in order to attain the highest possible levels of precision, accuracy and throughput, and the broadest range of capability in determining the age of geological samples related to archaeometry. 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. Though routine in some regards, evolving technology permits continued improvements in the method's capabilities, particularly in dating younger, smaller, or less potassic materials. Such improvements pay large scientific dividends by expanding the scope of problems that can be solved.This grant will be vital both to maintaining routine availability of 40Ar/39Ar dating for the archeological and paleoanthropological communities, as well as to advance the capabilities of 40Ar/39Ar dating methods at BGC. It will help sustain routine access to high-quality 40Ar/39Ar data for archeological and paleoanthropological research worldwide and to continue refinement of 40Ar/39Ar methods to improve precision and accuracy, particularly at the younger end of applicability. Finally, this grant will provide the opportunity to replace or augment old equipment to maintain high levels of productivity and scientific excellence.In order to address these goals over the next three years, the grant will be focused primarily in three areas: 1) Development of an ultra clean, high-throughput extraction system that will be a suitable match to a separately funded, new multi-collector noble-gas mass spectrometer; 2) Continued development of the computer control systems and data reduction techniques necessary to utilize the new multi-collector machine; and 3) Modifications to sample processing facilities to improve efficiency of sample preparation. A new generation extraction line characterized by rapid throughput will be essential to take full advantage of the highly accelerated speed of data collection anticipated with the new multi-collector mass spectrometer. Further development of in-house computer control systems is necessitated by the requirements of a new generation of multi-collector machines that is now breaking on the 40Ar/39Ar dating community. Improvements in sample preparation will enable the supply of high-quality samples to keep pace with the increased analytical throughput.

在国家科学基金会的支持下，博士。 Alan Deino 和 Paul Renne 将开始为期三年的工作，升级位于加利福尼亚州伯克利的伯克利地质年代学中心的 40Ar/39Ar 测年设施，以达到尽可能高的精度、准确度和吞吐量水平以及最广泛的范围确定与考古学相关的地质样本年龄的能力。 40Ar/39Ar 测年方法在考古学和古人类学背景下具有最广泛的时间范围，并且被认为是一种高度准确和精确的测年工具，为原始人类和原始人类进化的研究做出了广泛贡献。尽管在某些方面是常规的，但不断发展的技术允许该方法的能力不断改进，特别是在测定更年轻、更小或钾含量较低的材料方面。这些改进通过扩大可解决问题的范围带来了巨大的科学红利。这笔赠款对于维持考古学和古人类学界 40Ar/39Ar 测年的常规可用性以及提高 40Ar/39Ar 的能力至关重要BGC 的约会方法。它将有助于维持对全球考古和古人类学研究的高质量 40Ar/39Ar 数据的常规访问，并继续完善 40Ar/39Ar 方法以提高精度和准确度，特别是在较年轻的适用性方面。最后，这笔赠款将提供更换或增强旧设备的机会，以保持高水平的生产力和科学卓越性。为了在未来三年内实现这些目标，赠款将主要集中在三个领域：1）开发超洁净、高通量萃取系统，可与单独资助的新型多接收器稀有气体质谱仪相匹配； 2) 继续开发利用新型多收集器机器所需的计算机控制系统和数据缩减技术； 3) 改进样品处理设施以提高样品制备效率。为了充分利用新型多接收器质谱仪预期的高度加速的数据收集速度，以快速通量为特征的新一代提取线至关重要。新一代多收集器机器的要求需要进一步开发内部计算机控制系统，该机器现已突破 40Ar/39Ar 约会社区。样品制备的改进将使高质量样品的供应能够跟上分析通量增加的步伐。