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

ESH奖将支持一组研究人员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）与珊瑚和洞穴沉积物的稳定同位素和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）从密苏里州的洞穴沉积物建立北美洲中部大陆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。

The ESH award will support a team of investigators to address three separate projects, each combining the use of radiochemical datinge techniques (14C, 230Th and 231Pa) with stable isotope 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.