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.

我们提出了在Yakutat的活跃板角 - 阿拉斯加北美俯冲带（St. Elias ecorogen）的活动板角的整合。我们将使用热键和侵蚀模型来重建温度 - 从碎屑和基岩地理/热量人工学样本中的时间路径，这些模型量化了该区域可能的变形和侵蚀历史的范围。数据和模型将用于检验有争议的假设，即板拐角会产生快速而聚焦的变形和挖掘。这项研究的结果将适用于通过记录板拐角处的地球动力学过程来理解世界其他地方的造基因过程。在此延续建议中，我们介绍了该项目的成就和结果，这些项目记录了快速发掘岩石的空间范围。在第二部分中，我们介绍了该项目最后阶段的工作时间表和目标。

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

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

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