Incision History of the Middle Indus River from (U-Th)/He Dating of Apatite

从磷灰石 (U-Th)/He 定年来看印度河中游的切割历史

• 批准号: 0106806
• 负责人: Peter Zeitler
• 金额: $ 4.82万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2004-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0106806&HistoricalAwards=false
• 关键词: Incision; History; Middle; Indus; River

0106806ZeitlerLarge rivers are an important element in the geodynamic - evolution of orogens, as they define base level for drainage and removal of considerable material. However, at spatial scales consistent with crustal tectonics, it is difficult to decipher the incision histories of major rivers because the erosion they facilitate removes most of the direct evidence. Helium dating of apatite has the potential to provide timing information of river incision in orogenic areas. This project will examine the Indus River incision history as it crosses the Nanga Parbat metamorphic massif in Pakistan. Results will be useful in testing theories of tectonics and topography of the Himalaya.

0106806 Zeitler大型河流是造山带地球动力学演化的一个重要因素，因为它们确定了排水和大量物质迁移的基准面。 然而，在与地壳构造相一致的空间尺度上，很难破译主要河流的切割历史，因为它们促进的侵蚀消除了大部分直接证据。 磷灰石氦同位素年龄测定可提供造山带河流下切的时间信息。 该项目将研究印度河穿越巴基斯坦南迦帕尔巴特变质带时的切割历史。 研究结果对喜马拉雅地区构造和地形理论的检验具有重要意义。