Collaborative: Combined 230 Th and 231 Pa Dating: Establishing the Absolute Timing of Late Quaternary Climate Changes and Calibrating the 14 C Timescale

合作：230 Th 和 231 Pa 联合测年：确定晚第四纪气候变化的绝对时间并校准 14 C 时间尺度

• 批准号: 9810724
• 负责人: Frederick Taylor
• 金额: $ 7.3万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-12-01 至 2002-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9810724&HistoricalAwards=false
• 关键词: Collaborative; Combined; 230; Th; 231

This ESH award will support ateam of investigators to address three separate projects, each combining the use of radiochemical dating techniques (14C, 230Th and 231Pa) with stable isoptope and trace element analysis of corals and speleothems. Projects include: (1) Calibration of the radiocarbon time scale between 10,000 and 48,000 years BP using previously-collected corals from Papua New Guinea and speleothems from the Bahamas; (2) Establish a high-resolution climate record for the mid-continent of North America from Missouri Speleothems; (3) Determine the age and sea-level history for the penultimate deglaciation (Termination II) using coral outcrops in Barbados.

该ESH奖项将支持一个研究团队解决三个独立的项目，每个项目都将放射化学测年技术（14 C，230 Th和231 Pa）与稳定同位素和珊瑚和洞穴沉积物的微量元素分析相结合。 项目包括：（1）利用以前从巴布亚新几内亚采集的珊瑚和从巴哈马采集的洞穴沉积物，校准10 000年至48 000年BP之间的放射性碳时间尺度;（2）建立从密苏里州采集的北美中部大陆洞穴沉积物的高分辨率气候记录;（3）利用巴巴多斯的珊瑚露头确定倒数第二次冰消期（第二次冰消期）的年龄和海平面历史。