Uplift and Exhumation of the Axial Zone in the Pyrenean Orogen, Spain

西班牙比利牛斯造山带轴带的隆起和折返

• 批准号: 9506454
• 负责人: Paul Fitzgerald
• 金额: $ 12万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506454&HistoricalAwards=false
• 关键词: Uplift; Exhumation; Axial; Zone; Pyrenean

The Pyrenees are an intracratonic mrogen which formed between late Cretaceous and Early Miocenes as a result of convergent motions between the Afro-Iberian and European plates. No large-scale subduction of ocean crust preceded the formations of the Pyrenees and no magma formed, yet recent work indicates 150 km of massive crustal shortening. The recent ECORS seismic section has allowed a detailed sequence of events to be developed to explain these data. If correct, the proposed sequence of events has importance for the tectonics of the western Mediterraneans. The purpose of this project is to test these ideas by using Fission Track geochronometry to help discriminate between the different uplift patterns predicted. Results should help in understanding compressional collisions where the amount of seafloor subduction has been minor.

比利牛斯山脉是克拉通内的高原，是由于非洲-伊比利亚板块和欧洲板块之间的汇聚运动而在白垩纪晚期和中新世早期之间形成的。 在比利牛斯山脉形成之前，没有发生大规模的洋壳俯冲，也没有形成岩浆，但最近的研究表明，地壳发生了 150 公里的大规模缩短。 最近的 ECORS 地震剖面已允许开发详细的事件序列来解释这些数据。 如果正确的话，所提出的事件顺序对于西地中海的构造具有重要意义。 该项目的目的是通过使用裂变径迹测时法来测试这些想法，以帮助区分预测的不同隆起模式。 结果应该有助于理解海底俯冲量较小的压缩碰撞。