Collaborative Research: Thrust Belt Response to Rapid Surface Uplift of the Altiplano: A Field Test of Cordilleran Cyclicity in Southern Bolivia

合作研究:冲断带对高原快速地表隆升的响应:玻利维亚南部科迪勒拉循环的现场测试

基本信息

  • 批准号:
    1250512
  • 负责人:
  • 金额:
    $ 13.05万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2013
  • 资助国家:
    美国
  • 起止时间:
    2013-07-01 至 2016-06-30
  • 项目状态:
    已结题

项目摘要

The Cordilleran cyclicity model predicts that detachment of dense continental lithosphere should be accompanied by rapid uplift of an orogenic plateau and resulting rapid advance of deformation in the frontal fold-thrust belt. In the central Andean plateau, recent isotopic studies argue for rapid surface uplift of the southern Altiplano in Bolivia between 16 and 13 million years ago, which has been attributed to removal of dense material at depth. The Cordilleran cyclicity model predicts that the Andean fold-thrust belt should have responded to this rapid uplift event through rapid eastward propagation of the deformation front. However, accurate records of the timing and magnitude of deformation in the thrust belt in southern Bolivia are not available, which leaves this key prediction untested. In this project, we are performing a field-based study aimed at documenting the response (or lack thereof) of the Andean fold-thrust belt to the rapid rise of the hinterland plateau. The project involves geologic mapping along an east-west transect through the thrust belt in southern Bolivia, which will support construction of a balanced cross-section. By sequentially restoring deformation in the cross-section, we are generating a record of shortening over the last ~20-30 million years. This record will be integrated with deformation timing constraints from analysis of field relationships of sedimentary rocks deposited during crustal shortening, and timing estimates for erosion of multiple thrust sheets obtained from low-temperature cooling histories. The final goal of the project will be to generate a timing record of forward propagation rates of the thrust front and of contemporaneous depositional centers. Together, these records will allow us to evaluate the orogenic response to rapid hinterland surface uplift, and therefore to test a key prediction of the Cordilleran cyclicity model. This project is training graduate and undergraduate students (including a Bolivian graduate student studying in the U.S.) in a STEM field, and is contributing to the broadening of representation of underrepresented groups in the earth sciences; it is facilitating a new collaboration between U.S. investigators at two institutions (University of Nevada Reno and the University of Texas at Austin); and it is fostering a valuable international collaboration between U.S. and Bolivian scientists. This award is being co-funded by NSF's Office of International Science and Engineering.
根据Cordillance旋回性模型预测,致密大陆岩石圈的拆离应伴随着造山高原的快速隆升,并导致前缘褶皱冲断带变形的快速推进。 在安第斯高原中部,最近的同位素研究表明,玻利维亚南部高原在1600万至1300万年前发生了快速的表面隆起,这是由于深层致密物质的迁移。 科迪勒拉旋回性模型预测,安第斯褶皱冲断带应通过变形锋的快速向东传播来响应这一快速隆升事件。 然而,玻利维亚南部冲断带变形的时间和幅度的准确记录是不可用的,这使得这一关键预测未经检验。在这个项目中,我们正在进行一项实地研究,目的是记录安第斯褶皱冲断带对内陆高原快速上升的反应(或缺乏反应)。 该项目涉及沿玻利维亚南部冲断带的东西向断面沿着进行地质测绘,这将有助于建造平衡断面。 通过顺序恢复横截面的变形,我们正在创造过去2000万至3000万年来缩短的记录。 这一记录将整合与变形的时间限制,从现场的关系分析沉积岩在地壳缩短,并从低温冷却历史中获得的多个逆冲断层片侵蚀的时间估计。 该项目的最终目标将是生成逆冲前缘和同期沉积中心向前传播速率的时间记录。 总之,这些记录将使我们能够评估造山作用对腹地表面快速隆起的响应,从而测试科迪勒拉旋回性模型的关键预测。该项目正在培训研究生和本科生(包括在美国学习的玻利维亚研究生)该项目在科学、技术、工程、数学和数学领域取得了进展,为扩大地球科学中代表性不足群体的代表性做出了贡献;该项目正在促进两个机构(内华达州大学里诺和得克萨斯大学奥斯汀分校)的美国调查人员之间的新合作;该项目正在促进美国和玻利维亚科学家之间的宝贵国际合作。该奖项由NSF国际科学与工程办公室共同资助。

项目成果

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Brian Horton其他文献

emGraduate Student Literature Review:/em The use of integrated sensor data for the detection of hyperketonemia in pasture-based dairy systems during the transition period
硕士研究生文献综述:在过渡时期基于牧场的乳制品系统中使用综合传感器数据检测高酮血症
  • DOI:
    10.3168/jds.2024-24968
  • 发表时间:
    2025-01-01
  • 期刊:
  • 影响因子:
    4.400
  • 作者:
    Pia F. Benedetti Vallenari;Ian Hunt;Brian Horton;Michael Rose;Sarah Andrewartha
  • 通讯作者:
    Sarah Andrewartha

Brian Horton的其他文献

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{{ truncateString('Brian Horton', 18)}}的其他基金

Collaborative Research: Internal and external drivers of orogenic episodicity in the Ecuadorian Andes
合作研究:厄瓜多尔安第斯山脉造山偶发性的内部和外部驱动因素
  • 批准号:
    1946700
  • 财政年份:
    2020
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
Shortening, extension, and drainage reorganization in the Andean fold-thrust belt and broken foreland basin of northern Patagonia, Argentina
阿根廷巴塔哥尼亚北部安第斯褶皱冲断带和破碎前陆盆地的缩短、延伸和排水重组
  • 批准号:
    1918541
  • 财政年份:
    2019
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
Rapid Miocene Thrust Propagation and Wholesale Basin Partitioning along the Central and Southern Andes, Argentina
阿根廷安第斯山脉中部和南部沿线的快速中新世逆冲传播和批发盆地划分
  • 批准号:
    1348031
  • 财政年份:
    2014
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
Evaluating Along-strike Variations in Surface Uplift of the Andes: Constraints from Molecular Paleoaltimetry in the Eastern Cordillera of Colombia
评估安第斯山脉地表隆起的沿走向变化:来自哥伦比亚东部科迪勒拉山脉分子古海拔测量的限制
  • 批准号:
    1019857
  • 财政年份:
    2010
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
CAUGHT: Central Andean Uplift and the Geodynamics of High Topography
发现:安第斯中部隆起和高地形的地球动力学
  • 批准号:
    0908518
  • 财政年份:
    2009
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Continuing Grant
Collaborative Research: Development of Extensional Systems in Regions of Hot, Thick Crust: Insight from Tibet
合作研究:热厚地壳区域伸展系统的发展:来自西藏的见解
  • 批准号:
    0809425
  • 财政年份:
    2008
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Stratigraphic Signatures of Orogeny: Assessing the Timing of Initial Andean Crustal Shortening
合作研究:造山运动的地层特征:评估安第斯地壳初始缩短的时间
  • 批准号:
    0710793
  • 财政年份:
    2007
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Continuing Grant
Tectonic and Climatic Controls on Rapid Exhumation Along the Altiplano-Eastern Cordillera Boundary, Bolivia
玻利维亚高原-东科迪勒拉边界沿线快速折返的构造和气候控制
  • 批准号:
    0829402
  • 财政年份:
    2007
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
Tectonic and Climatic Controls on Rapid Exhumation Along the Altiplano-Eastern Cordillera Boundary, Bolivia
玻利维亚高原-东科迪勒拉边界沿线快速折返的构造和气候控制
  • 批准号:
    0510441
  • 财政年份:
    2005
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Detachment Faulting and Basin Development in a Convergent Setting: The Cordillera Blanca, Peru
合作研究:聚合环境中的拆离断层作用和盆地发育:秘鲁布兰卡山脉
  • 批准号:
    0201937
  • 财政年份:
    2002
  • 资助金额:
    $ 13.05万
  • 项目类别:
    Standard Grant

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