How do continental plateaus grow? Climate-tectonic interactions in Tibet, Anatolia and the Central Andes

大陆高原是如何生长的？

基本信息

批准号：
385721-2010
负责人：
Schoenbohm, Lindsay
金额：
$ 1.82万
依托单位：
University of Toronto
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2013
资助国家：
加拿大
起止时间：
2013-01-01 至 2014-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=528682
关键词：
How do continental plateaus grow

项目摘要

Continental plateaus are some of the most striking features on the surface of the Earth, fundamentally altering the Earth's regional and even global climate, and encompassing among the most seismically active places on Earth. However, they remain relatively poorly understood tectonic features. Why do they form in some settings and not others? Does climate play a role in preserving them or in triggering their formation in the first place? What mechanisms (faults, folds, processes deep in the tectonic plate) allow them to grow both higher and wider over time? How does lateral movement along faults helps accommodate their growth? My students and I will seek to address these questions on each of Earth's major plateaus: the Andean Plateau in NW Argentina, the western end of the Tibetan Plateau in China, and on the Anatolian Plateau in eastern Turkey. My research team will create geologic and geomorphic maps in the field and using satellite imagery. We will collect data from faults and use surface exposure dating of geomorphic surfaces (e.g. river terraces, glacial moraines) cut by these faults to measure how fast they are moving. Finally, we will use landscape indicators such as watershed shape, river profiles and glacial snowline to determine regional patterns of uplift and deformation. Ultimately, this interdisciplinary research will contribute to constraining the connection between deep Earth processes, uplift, climate and deformation within the three largest plateaus on Earth. The insights gained through this work will contribute to understanding climate-tectonic interactions, seismic hazards and mountain building in other regions and at other times in Earth's history.

大陆高原是地球表面上最引人注目的特征，从根本上改变了地球的区域甚至全球气候，并涵盖了地球上最活跃的地方。但是，它们仍然相对较少了解构造特征。为什么它们在某些设置而不是其他设置中形成？气候在保存它们或触发其形成方面是否起着作用？哪些机制（故障，褶皱，过程深处的构造板中的过程）使它们随着时间的流逝而变得更高和更宽？横向运动如何有助于适应其生长？我和我的学生将寻求在地球每个主要高原上解决这些问题：西北阿根廷的安第斯高原，中国藏高原的西端以及土耳其东部的安纳托利亚高原。我的研究团队将在该领域并使用卫星图像创建地质和地貌地图。我们将从断层中收集数据，并使用这些断层切割的地貌表面（例如河梯，冰川冰山）的表面暴露日期，以测量它们移动的速度。最后，我们将使用景观指标，例如流域形状，河流轮廓和冰川雪线来确定隆起和变形的区域模式。最终，这项跨学科研究将有助于限制地球三个最大高原最大的地球过程，隆升，气候和变形之间的联系。通过这项工作获得的见解将有助于理解其他地区以及地球历史上其他时代的气候施加互动，地震危害和山区建筑。