CAREER: Testing Models of Cretaceous Cordilleran Paleogeography: An Integrated Provenance Study of Four Basins

职业:白垩纪科迪勒拉古地理模型测试:四个盆地的综合物源研究

基本信息

  • 批准号:
    0846695
  • 负责人:
  • 金额:
    $ 40.3万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2009
  • 资助国家:
    美国
  • 起止时间:
    2009-08-15 至 2014-07-31
  • 项目状态:
    已结题

项目摘要

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Tectonic deformation, magmatism, and associated changes in erosion rates and paleodrainage systems directly affect sedimentary basin evolution in active tectonic settings. Thus, a detailed and robust evaluation of convergent margin sedimentary basins may provide the most complete record of tectonic and magmatic events in ancient convergent margin systems. The North American Cordillera provides an ideal setting for developing this robust provenance technique because extensive geochronologic, geochemical, and isotopic studies throughout the orogen establish an explicit basis for comparing sediment sources against the provenance data to be collected. Because no clear consensus has been reached on the Mesozoic and younger paleogeographic evolution of the western Cordillera, provenance results will address longstanding questions of terrane translation and rotation. The scientific merit of the proposed study lies in the development of an integrated sedimentary provenance technique that will be generally applicable to basin evolution studies in convergent systems worldwide. The proposed basin provenance analysis integrates sedimentary petrography with detrital zircon analysis, whole-rock major and trace-element geochemistry, and neodymium isotopic analysis to develop a detailed approach to studying convergent margin basins that should be transferable to similar systems around the world. The robust geochemical and geochronologic dataset resulting from a combination of multiple provenance tools includes information from all grain sizes and compositions within a basin?s stratigraphy. Integrated provenance analysis that includes the more homogenized fine-grained component of basin strata will permit better correlation within and between basins. Cretaceous basins whose sedimentary provenance may provide crucial links to source regions include the Methow basin in southern British Columbia and northern Washington State, the Ochoco basin in eastern Oregon, the Hornbrook Formation in southern Oregon and northern California, and the Great Valley Group in California. With the exception of the Great Valley Group, the provenance of these Cretaceous Cordilleran basins has been studied largely at a reconnaissance level, and none of these basins have been studied through integration of all proposed provenance tools. Together, these various provenance methods permit documentation of the evolution of sediment sources through time and space within a single basin, improved stratigraphic age control, and better correlation within a single basin and between basins.
该奖项是根据2009年美国复苏和再投资法案(公法111-5)资助的。构造变形、岩浆活动以及与之相关的侵蚀速率和古排水系统的变化直接影响着活跃构造环境下沉积盆地的演化。因此,对会聚边缘沉积盆地进行详细而有力的评价,可以提供最完整的古代会聚边缘系统的构造和岩浆事件记录。北美科迪勒拉为开发这种可靠的物源技术提供了理想的环境,因为在整个造山带进行了广泛的地质年代学、地球化学和同位素研究,为将沉积物来源与即将收集的物源数据进行比较建立了明确的基础。由于对西科迪勒拉中生代和更年轻的古地理演化尚未达成明确的共识,物源结果将解决长期存在的地面平移和旋转问题。该研究的科学价值在于开发了一种综合沉积物源技术,该技术将普遍适用于全球会聚体系的盆地演化研究。提出的盆地物源分析将沉积岩石学与碎屑锆石分析、全岩主要元素和微量元素地球化学以及钕同位素分析相结合,以开发一种详细的方法来研究会聚边缘盆地,该方法应可转移到世界各地的类似系统中。强大的地球化学和地质年代学数据集由多种物源工具组合而成,包括盆地内所有粒度和成分的信息。年代地层学。综合物源分析包括盆地地层中更均匀的细粒成分,可以更好地进行盆地内部和盆地之间的对比。白垩纪盆地的沉积物源可以提供与物源区的关键联系,包括不列颠哥伦比亚省南部和华盛顿州北部的Methow盆地、俄勒冈州东部的Ochoco盆地、俄勒冈州南部和加利福尼亚州北部的Hornbrook组以及加利福尼亚州的Great Valley Group。除了Great Valley群外,这些白垩系科迪勒拉盆地的物源研究主要停留在侦察层面,没有一个盆地是通过整合所有提出的物源工具进行研究的。总之,这些不同的物源方法可以记录单个盆地内沉积物来源随时间和空间的演变,改善地层年龄控制,并在单个盆地内和盆地之间更好地进行对比。

项目成果

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Kathleen Surpless其他文献

Kathleen Surpless的其他文献

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{{ truncateString('Kathleen Surpless', 18)}}的其他基金

Collaborative Research: RUI: Continental-Scale Study of Jura-Cretaceous Basins and Melanges along the Backbone of the North American Cordillera-A Test of Mesozoic Subduction Models
合作研究:RUI:北美科迪勒拉山脊沿线汝拉-白垩纪盆地和混杂岩的大陆尺度研究——中生代俯冲模型的检验
  • 批准号:
    2346564
  • 财政年份:
    2024
  • 资助金额:
    $ 40.3万
  • 项目类别:
    Standard Grant
RUI: Collaborative Research: Testing models for the Late Jurassic Nevadan Orogeny: Age, provenance, and structural evolution of the Galice and Mariposa basins, OR and CA
RUI:合作研究:侏罗纪晚期内华达造山运动的测试模型:加利斯盆地和马里波萨盆地(OR 和 CA)的年龄、起源和结构演化
  • 批准号:
    2052111
  • 财政年份:
    2021
  • 资助金额:
    $ 40.3万
  • 项目类别:
    Standard Grant
Collaborative Research: RUI: Provenance and Paleomagnetic Analysis of the Ochoco Basin: A Window into Late Cretaceous Paleogeography
合作研究:RUI:奥乔科盆地的物源和古地磁分析:了解晚白垩世古地理的窗口
  • 批准号:
    1450974
  • 财政年份:
    2015
  • 资助金额:
    $ 40.3万
  • 项目类别:
    Standard Grant
Collaborative Research: A Detrital Zircon Record of California Arc Magmatism
合作研究:加州弧岩浆作用的碎屑锆石记录
  • 批准号:
    1347985
  • 财政年份:
    2014
  • 资助金额:
    $ 40.3万
  • 项目类别:
    Standard Grant

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