Continued Development and Application of K-Ar and 40Ar/30Ar Dating for Archaeometric Research

K-Ar 和 40Ar/30Ar 测年法在考古研究中的持续开发和应用

• 批准号: 9106787
• 负责人: Alan Deino
• 金额: $ 24.01万
• 依托单位: Institute of Human Origins
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-01 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9106787&HistoricalAwards=false
• 关键词: Continued; Development; Application; Ar; 40Ar

With NSF support, Drs. Deino, Drake and Curtis have established a Berkeley Geochronology Center (BGC) at the Institute of Human Origins in Berkeley, California. The BGC focuses on K-AR (potassium - argon) dating and can now produce about 250 conventional 40K Ar39 dates per year and 3000 single-crystal laser microprobe dates which equal about 500 sample dates a year (several subsamples from the same sample are routinely dated). Their microprobe is fully automated and, furthermore, provides the ability to date sub-milligram single volcanic crystals. This permits discrete age populations in multi-age component samples to be identified. Much of the laboratories research is focused on geochronology pertaining to hominid-hominoid (human-great ape) evolution and associated archaeology and paleontology. With three years of additional support, the laboratory will work to improve this dating technique to permit more precise and accurate dates. They will also continue their collaboration with paleoanthropologists and address a wide range of anthropologically significant site specific problems. The potassium argon technique, which allows absolute ages to be derived from volcanic materials has revolutionized the field of human origins studies because many important sites in Africa, which were previously undatable, contain multiple volcanic horizons. Fossils can only be correctly interpreted if put into a chronological framework, and many specimens which were difficult to use have taken on new importance. Dr. Deino and his colleagues have been leaders in the development and application of this technique. It is thus important to support both their laboratory and the specific research goals they are pursuing.

在NSF的支持下，Deino、Drake和Curtis博士建立了一个 伯克利地质年代学中心（Berkeley Geochronology Center，BGC） 起源于加州的伯克利。 BGC专注于K-AR （钾-氩）测年，现在可以产生约250 每年常规40 K Ar 39测年和3000个单晶 激光微探针测年，相当于每年约500个样本测年 （同一样本的几个子样本通常注明日期）。 他们的微探针是全自动的，而且， 能够测定亚毫克级的单个火山晶体的年代。 这 允许多年龄成分样本中的离散年龄群体 待识别。 许多实验室的研究都集中在 关于人科-类人猿（人类-类人猿）的年代学 进化和相关的考古学和古生物学。 在三年的额外支持下，实验室将 为了改进这种测年技术， 准确的日期 他们还将继续与 古人类学家，并解决了广泛的 人类学意义重大的特定问题。 钾氩技术，它可以使绝对年龄， 从火山物质中提炼出来的， 人类起源的研究，因为许多重要的地点在非洲， 在过去无法确定年代， 地平线 只有把化石放入 一个时间框架，和许多标本， 使用起来很困难，这一点有了新的重要性。 Deino博士和他的同事们一直是开发的领导者 以及这项技术的应用。 因此， 支持他们的实验室和具体的研究目标 他们在追求。