Radiocarbon Dating of Collagen-degraded Bone: The Use of Ostecalcin

胶原蛋白降解骨的放射性碳测年：骨钙素的使用

• 批准号: 9119958
• 负责人: R. Taylor
• 金额: $ 2万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-11-01 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119958&HistoricalAwards=false
• 关键词: Radiocarbon; Dating; Collagen; degraded; Bone

Dr. Taylor and his colleagues will conduct exploratory research to determine the feasibility of using osteocalcin to radiocarbon date bone. The project consists of three parts. First osteocalcin will be extracted from sample bone and its purity determined through analysis of amounts of Gla and Hyp present. Secondly osteocalcin will be extracted from bone with known age of greater than 100,000 years and then radiocarbon dated. One would expect that radioactive activity would not exceed background levels. Finally osteocalcin will be extracted from degraded bone which derives from Clovis age sites (ca. 10,000 years old). This also will be radiocarbon dated and the accuracy of the results determined. Most of the organic fraction of bone consists of collagen and many experiments have shown that if this collagen is not seriously degraded by post depositional processes it can yield accurate radiocarbon ages. However it is also clear that degraded collagen often given anomalous results. Osteocalcin is a non- collagen organic material which is also present in bone and preliminary results lead Taylor and his colleagues to believe that it may provide accurate dates for degraded bone. This preliminary exploratory project will serve to evaluate this approach and hopefully provide the basis for more large scale work. This research is important not only for archaeologists but other scientists who wish to date the past. Bone is often the only organic material preserved in archaeological sites and other prehistoric contexts. While it is sometimes datable, often it is too chemically altered to give good results. The technique developed here may remedy this problem.

泰勒博士和他的同事将进行探索性研究 确定骨钙素用于放射性碳的可行性 枣骨该项目包括三个部分。第一骨钙素 将从样品骨中提取并测定其纯度 通过分析Gla和Hyp的含量。其次 骨钙素将从已知年龄较大的骨中提取， 超过10万年，然后进行放射性碳测年。人们会期望 放射性不会超过本底水平。 最后，将从降解的骨中提取骨钙素， 源自克洛维斯时代遗址（约1万年）。这也 将进行放射性碳年代测定， 测定 骨的大部分有机部分由胶原蛋白组成， 许多实验表明，如果这种胶原蛋白不 在沉积后的过程中严重退化， 精确的放射性碳年代然而，很明显， 胶原蛋白通常会产生异常结果。骨钙素是一种非- 也存在于骨中的胶原有机材料， 初步结果使泰勒和他的同事们相信， 它可以为退化的骨头提供准确的日期。这 初步探索项目将用于评估这一点 方法，并希望为更大规模的 工作 这项研究不仅对考古学家很重要， 希望追溯过去的科学家们骨头往往是唯一 保存在考古遗址和其他地方的有机物质 史前背景虽然它有时是有日期的，但通常是 化学成分改变太多而不能产生好的结果。该技术 这里开发的可以解决这个问题。