Quantifiying deformation and erosion at the Yakutat plate corner (SE Alaska) with integrated thermochronology and numerical modelling

通过综合热年代学和数值模拟量化雅库塔特板块角（阿拉斯加东南部）的变形和侵蚀

• 批准号: 173238485
• 负责人: Professor Dr. Todd Alan Ehlers
• 金额: --
• 依托单位: Department of Geoscience
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/173238485?language=en
• 关键词: Quantifiying; deformation; erosion; Yakutat; plate

We propose an integration of field studies, thermochronology, sedimentology, and numerical modeling at the active plate corner of the Yakutat - North American subduction zone in SE Alaska (St. Elias orogen). We will reconstruct temperature - time paths from detrital and bedrock geo-/thermochronology samples using thermo-kinematic and erosion models that quantify the range of possible deformation and erosion histories in this region. The data and models will be used to test the controversial hypothesis that plate corners produce rapid and focused deformation and exhumation. Results from this study will be applicable to understanding orogenic processes elsewhere in the world by documenting geodynamic processes at plate corners. In this continuation proposal we present our accomplishments and results of this project that document the spatial extent of rapidly exhuming rocks. In the second part we present our work schedule and goals for the final stage of this project.

我们建议在阿拉斯加东南部雅库塔特-北美俯冲带（圣埃利亚斯造山带）的活动板块拐角处整合实地研究、热年代学、沉积学和数值模拟。我们将重建温度-时间路径从碎屑和基岩地质/热年代学样本使用热运动学和侵蚀模型，量化的范围内可能的变形和侵蚀的历史在这一地区。这些数据和模型将用于检验一个有争议的假设，即板块角部产生快速和集中的变形和折返。通过记录板块角部的地球动力学过程，本研究的结果将适用于了解世界其他地方的造山过程。在这个延续性的建议中，我们提出了我们的成就和这个项目的结果，记录了快速挖掘岩石的空间范围。在第二部分中，我们提出了我们的工作时间表和目标，为这个项目的最后阶段。

项目成果

Upper-crustal cooling of the Wrangellia composite terrane in the northern St. Elias Mountains, western Canada

• DOI: 10.1130/l508.1
• 发表时间: 2016-08-01
• 期刊: LITHOSPHERE
• 影响因子: 2.4
• 作者: Falkowski, Sarah;Enkelmann, Eva
• 通讯作者: Enkelmann, Eva

Low-temperature thermochronology of the Yakutat plate corner, St. Elias Range (Alaska): bridging short-term and long-term deformation

• DOI: 10.1016/j.quascirev.2014.10.019
• 发表时间: 2015-04-01
• 期刊: QUATERNARY SCIENCE REVIEWS
• 影响因子: 4
• 作者: Enkelmann, Eva;Valla, Pierre G.;Champagnac, Jean-Daniel
• 通讯作者: Champagnac, Jean-Daniel

Constraining the area of rapid and deep‐seated exhumation at the St. Elias syntaxis, Southeast Alaska, with detrital zircon fission‐track analysis

通过碎屑锆石裂变径迹分析，限制阿拉斯加东南部圣埃利亚斯构造的快速深层折返区域

• DOI: 10.1002/2013tc003408
• 发表时间: 2014
• 期刊: Tectonics
• 影响因子: 4.2
• 作者: Falkowski;Enkelmann;Ehlers
• 通讯作者: Ehlers

Spatial extent of rapid denudation in the glaciated St. Elias syntaxis region, SE Alaska

• DOI: 10.1002/jgrf.20136
• 发表时间: 2013-09
• 期刊: Journal of Geophysical Research: Earth Surface
• 作者: D. Grabowski;E. Enkelmann;T. Ehlers

Thermochronology in southeast Alaska and southwest Yukon: Implications for North American Plate response to terrane accretion

阿拉斯加东南部和育空地区西南部的热年代学：北美板块对地体增生反应的影响

• DOI: 10.1016/j.epsl.2016.10.032
• 发表时间: 2017
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: Enkelmann;Piestrzeniewicz;Falkowski;Stübner;Ehlers
• 通讯作者: Ehlers