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.

9909393 Pazzagagagagliasextimpieptimpieptiage山脉的剩余抬高是很难解释的，但是在长期活跃的Orogens中存在一些较高山地形的例子。 这项研究将调查巴尔的摩峡谷中大量中新世的大量中新世沉积物提出的建议，尽管在过去的20个ME中，已从新英格兰阿巴拉契亚人那里除去了多达3公里的材料，尽管停止了200次粉状。我早。 该项目涉及采用相对较新的辐射技术，该技术具有检测和量化这种幅度的潜力。 预计结果将测试该区域的最新挖掘，并洞悉岩石上的岩石内和后源性过程。