Assessing patterns of deformation across the Precordillera thrust belt of northwestern Argentina: A multiple thermochronometer study of foreland exhumation

朱莉·福斯迪克博士获得了美国国家科学基金会地球科学博士后奖学金，将在图森的亚利桑那大学开展一项研究和教育计划。该项目旨在利用Bermejo盆地和Precordillera褶皱冲断带的基岩和碎屑地质热年代学，量化阿根廷西北部中央安第斯山脉地壳增厚和冲断带折返的时间变化。这一研究结果还将描述第三系前陆和山间盆地地层的源汇热史。这些发现将在更大的区域背景下进行评估，以阐明阿根廷西北部中央前记录时代前陆折返和变形的空间格局、时间和速率，以调查中央安第斯造山带内沿走向的构造样式变化和盆地演化。汇聚的板块构造系统以世界各地令人印象深刻的山带为代表，形成了为世界盆地提供沉积物的显著地形特征。然而，现有的俯冲带大陆变形模型不能充分解释构造构造的多样性和规模，因此需要更好地了解影响造山带发展的地质过程。这些也是需要了解的重要过程，因为它们与地震和火山灾害以及自然资源的分布有关。该项目包括亚利桑那大学和阿根廷布宜诺斯艾利斯大学的详细教育和推广计划。该研究员将讲授两个高级和研究生级别的研讨会：科迪勒造山系统中的折返和控制机制(UA，第一年)和应用于构造问题的热年代学(UBA，第二年)。最后，博士后研究员将指导学生研究项目，以扩大她的教学和指导经验，为在地球科学的学术生涯做准备。

Dr. Julie Fosdick has been awarded an NSF Earth Sciences Postdoctoral Fellowship to carry out a research and education plan at the University of Arizona, Tucson. This project aims to quantify temporal changes in crustal thickening and thrust belt exhumation along the central Andes of northwestern Argentina by employing bedrock and detrital geo-thermochronology of the Bermejo Basin and Precordillera fold-thrust belt. Results from this study will also characterize the source-sink thermal history of Tertiary foreland and intermontane basin strata. Findings will be evaluated in the larger regional context to elucidate the spatial pattern, timing, and rates of foreland exhumation and deformation in the central Precordillera of northwestern Argentina to investigate along-strike changes in structural style and basin evolution within the Central Andean orogen.Convergent plate tectonic systems are represented by impressive mountain belts throughout the world, forming significant topographic features that provide sediment to the world's basins. However, existing models for continental deformation along subduction zones do not sufficiently explain the diversity and magnitude of tectonic structures, motivating the need to better understand the geologic processes that modulate the development of orogenic belts. These are also important processes to understand because they are linked to seismic and volcanic hazards and the distribution of natural resources. The project includes a detailed education and outreach program at the University of Arizona and the University of Buenos Aires, Argentina. Two upper-division and graduate level seminars will be taught by the fellow: Exhumation and Controlling Mechanisms in Cordilleran Orogenic Systems (Year 1, UA), and Thermochronology Applied to Tectonic Problems (Year 2, UBA). Lastly, the postdoctoral fellow will mentor student research projects to broaden her teaching and mentorship experience in preparation for an academic career in the geosciences.