RUI: Collaborative Research: Quantifying the roles of tectonic activity and climate as drivers of glacial-interglacial landscape evolution in the Teton Range, Wyoming

RUI：合作研究：量化构造活动和气候作为怀俄明州提顿山脉冰川-间冰期景观演化驱动因素的作用

• 批准号: 1755073
• 负责人: Joseph Licciardi
• 金额: $ 14.69万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-01-15 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1755073&HistoricalAwards=false
• 关键词: RUI; Collaborative; Research; Quantifying; roles

The interplay of tectonics and climate is an essential aspect of mountain landscape evolution. Research efforts focusing on the interactions of mountain landscapes with climate and tectonism, especially those directed toward quantitative reconstructions of climatically and tectonically driven disturbances, are fundamental to understanding the past and future evolution of Earth's surface, and are critical for human adaptation and resource conservation efforts. This project focuses on the Teton mountain range in Grand Teton National Park, WY, where past climatic and tectonic disturbances are unusually well-recorded by glacial landforms, fault scarps, and lake sediment archives, all of which can be precisely dated. The overarching goals of this project are to quantify the influences of tectonic-driven disturbances (earthquakes, landslides) and climate-driven changes and disturbances (e.g. deglaciation, glacier fluctuations, vegetative shifts, fire occurrence) on alpine erosion rates and landscape evolution operating during the late Pleistocene and Holocene (past 25 ka). Specifically, the study combines detailed landform mapping, 10Be surface exposure dating, paleoseismic fault trenching, lake seismic surveys, and lake sediment cores to develop complementary records of: i) glacier fluctuations, including the timing and character of deglaciation and Neoglaciation; ii) environmental variability along the elevation gradient of the Teton range; and iii) earthquake timing and frequency related to postglacial ruptures of the Teton fault. The highly-active tectonic setting, distinctive geomorphology, and relatively pristine ecosystem of the Tetons present an exceptional opportunity for this research. Moreover, the integration of these techniques will provide comprehensive insights into the couplings and feedbacks among climatic and tectonic processes that modify all mountain landscapes over diverse length and time scales.

构造和气候的相互作用是山区进化的重要方面。研究工作的重点是山区景观与气候和构造主义的相互作用，尤其是针对气候和构造驱动的驱动的定量重建的研究工作，对于理解地球表面的过去和未来演变至关重要，并且对于人类的适应和资源保护工作至关重要。该项目着重于怀俄明州大提顿国家公园的提顿山脉，在那里，过去的气候和构造骚乱与冰川地面，故障疤痕和湖泊沉积物档案的录音异常良好，所有这些都可以精确地播出。该项目的总体目标是量化以构造驱动的干扰（地震，滑坡）以及气候驱动的变化和干扰的影响（例如，脱气，冰川波动，营养变化，发生的发生）对高山侵蚀率以及晚期pleistecene和holocene plecisenecene和holcensecene的景观进化（过去25 KA）的影响。具体而言，该研究结合了详细的地形图，10BE表面暴露日期，古震震性断层，地震调查和湖泊沉积物核心，以形成以下互补记录： ii）沿着提顿范围的海拔梯度沿着环境变异性； iii）地震时间和频率与提顿断层的冰川后破裂有关。 tetons的高度活跃的构造环境，独特的地貌和相对原始的生态系统为这项研究带来了极好的机会。此外，这些技术的集成将为气候和构造过程之间的耦合和反馈提供全面的见解，这些过程会在各种长度和时间尺度上修改所有山地景观。