How do Continental Plateaus Grow? Mantle to Surface Dynamics of the Anatolian and Andean Plateaus

大陆高原如何生长？

• 批准号: RGPIN-2015-04695
• 负责人: Schoenbohm, Lindsay
• 金额: $ 1.97万
• 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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=664511
• 关键词: How; do; Continental; Plateaus; Grow

My research group will investigate the formation of continental plateaus - regions where mountain ranges swell to great widths, with relatively flat tops. We focus on two key locations: (1) the Central Anatolian Plateau in Turkey; and (2) the southern part of the Central Andean Plateau, the Puna Plateau, in northwest Argentina. We are interested in the processes that shape the plateau from the deepest levels to the surface, including: detachment and formation of tears in the subducting oceanic plate; loss of the lower part of the tectonic plate to delamination or dripping; flow of the weak lower crust; shortening of the crust in an organized or disorganized manner; and the influence of climate and erosion on the redistribution of mass. My team uses a combination of field and GIS (computer) based mapping and dating to measure deformation, subsidence and uplift of the plateau in order to constrain the various influences on plateau growth. Specifically, in Argentina, a PhD student will map the interior of the southern Puna Plateau, three Master's students will map key basins around the margins of the plateau, and five undergraduates will measure features of mountain ranges on and around the plateau to constrain the history of deformation. In Turkey, a PhD student will map and measure movement rates along the Central Anatolian fault zone and other active faults, and two Master's students will constrain uplift by measuring the incision of a major river into the plateau. ******We anticipate making important advances in: (1) linking events unfolding in the bottom of the tectonic plate and below to the deformation we observe at the surface; (2) understanding the interplay of tectonic deformation and climate-controlled erosion in hindering or augmenting growth of plateaus; (3) building a deeper understanding of the nature and complexity of continental tectonics; and (4) assessing seismic hazards in central Turkey. Canada will benefit through the training of Highly Qualified Personnel in field mapping and GIS, highly desired qualifications in the growing employment area of industry and environmental consulting. They will benefit from exposure to international research collaborations as well. Many of the research questions are applicable to Canada, with its long history of tectonic deformation and ancient plateaus, the roots of which are now exposed in the Canadian Shield. **

我的研究小组将研究大陆高原的形成 - 山脉延伸至很宽的区域，顶部相对平坦。我们重点关注两个关键地点：（1）土耳其安纳托利亚中部高原； (2)安第斯高原中部的南部，即阿根廷西北部的普纳高原。我们对从最深处到地表塑造高原的过程感兴趣，包括： 俯冲海洋板块的分离和撕裂的形成；板块下部因分层或滴落而损失；弱下地壳的流动；地壳以有组织或无组织的方式缩短；以及气候和侵蚀对质量重新分布的影响。我的团队利用实地测绘和地理信息系统（GIS）测年相结合的方法来测量高原的变形、沉降和隆起，以限制对高原生长的各种影响。具体来说，在阿根廷，一名博士生将绘制普纳高原南部的内部地图，三名硕士生将绘制高原边缘周围的关键盆地地图，五名本科生将测量高原及其周围山脉的特征，以约束历史的变形。在土耳其，一名博士生将绘制并测量安纳托利亚中部断层带和其他活动断层沿线的运动速率，两名硕士生将通过测量一条主要河流切入高原来限制抬升。 ******我们预计在以下方面取得重要进展：（1）将板块底部及以下展开的事件与我们在地表观察到的变形联系起来； (2) 了解构造变形和气候控制侵蚀在阻碍或促进高原生长方面的相互作用； （3）加深对大陆构造的性质和复杂性的认识； (4) 评估土耳其中部的地震危险。加拿大将受益于实地测绘和地理信息系统领域高素质人才的培训，这是工业和环境咨询不断增长的就业领域中非常需要的资格。他们也将从国际研究合作中受益。许多研究问题都适用于加拿大，其构造变形和古代高原有着悠久的历史，其根源现在暴露在加拿大地盾中。 **