Exhumation and Topographic Evolution of the Post-Orogenic Appalachians Determined by Apatite U-Th/He Dating

磷灰石 U-Th/He 测年确定造山后阿巴拉契亚山脉的折返和地形演化

• 批准号: 9909393
• 负责人: Frank Pazzaglia
• 金额: $ 19.72万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909393&HistoricalAwards=false
• 关键词: Exhumation; Topographic; Evolution; Post; Orogenic

9909393PazzagliaSignificant residual elevation of ancient mountain ranges is difficult to explain, but several examples of elevated mountainous topography in long-inactive orogens exist. This study will investigate the suggestion made by the presence of a large volume of post Miocene sediments in the Baltimore Canyon that as much as 3 kilometers of material has been removed from the New England Appalachians in the last 20 My, despite cessation of orogenesis nearly 200 My earlier. The project involves application of a relatively new radiometric technique that has the potential to detect and quantify denudation of such magnitude. Results are expected to test the possible recent exhumation in this area and to provide insight into intraplate and post-orogenic processes of rock-uplift.

9909393Pazzaglia古代山脉的显著剩余海拔很难解释，但在长期不活跃的造山带中存在几个升高的山地地形的例子。 这项研究将调查的建议，大量的后中新世沉积物中存在的巴尔的摩峡谷，多达3公里的材料已被删除，从新英格兰阿巴拉契亚山脉在过去的20百万年，尽管停止造山作用近200百万年前。 该项目涉及应用一种相对较新的辐射测量技术，这种技术有可能探测和量化这种规模的剥蚀。 结果预计将测试可能在这一地区最近折返，并提供板内和造山后的岩石隆升过程的洞察。