CAREER: Unfolding Earth history back to the Mesozoic by incorporating seismic tomography into Pacific realm plate tectonic reconstructions

职业：通过将地震层析成像纳入太平洋板块构造重建，将地球历史追溯到中生代

• 批准号: 1848327
• 负责人: Jonny Wu
• 金额: $ 56.83万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-04-01 至 2024-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1848327&HistoricalAwards=false
• 关键词: CAREER; Unfolding; Earth; history; back

Current plate tectonic theory permits less than half of the Earth surface to be reconstructed with adequate detail by the early Cretaceous, which is only the most recent ~3% of Earth history. The largest unknowns lie within the Panthalassa-Pacific realm, a now-vanished oceanic domain that once covered ~70% of the Earth. This project will build a new Panthalassa-Pacific plate reconstruction back to Mesozoic times from the novel constraints of seismic tomography - seismological images of the Earth?s mantle. The research is combined with an educational plan that focuses on using Earth interior imaging to help develop the essential but underutilized STEM skill of 3D spatial analysis, an identified core geoscience skill. Outreach efforts prioritize reaching groups historically underrepresented in the sciences via undergraduate curriculum development, a collaborative partnership with a local inner-city STEM magnet high school, and through summer undergraduate experiences. This project will build a tomography-led, full plate reconstruction for the Pacific-Panthalassa realm back to the Mesozoic era that will contribute time-dependent kinematic and tectonic boundary conditions for global models and regional studies. An unconventional tomographic plate reconstruction workflow is used that involves 3D mapping of slabs from tomography, slab unfolding (retro-deformation), and assigning plate motions to the unfolded slabs in a hierarchical fashion using available kinematic constraints. The tomographic plate reconstruction model is systematically compared to relevant circum-Pacific geological datasets, and further tested as input boundary conditions for two distinct geodynamic forward modeling approaches using established workflows for the mature codes CitcomS and TERRA. The resulting plate model will provide an alternative subduction history for more than half of the Earth that can be simulated within other global models. In addition, the project explores the capabilities and limitations of seismic tomography for linking the deep mantle to the Earth surface for 4D Earth evolution, which supports an identified key research frontier for NSF Tectonics.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

目前的板块构造理论允许不到一半的地球表面在白垩纪早期被重建得足够详细，这只是最近的地球历史的3%。 最大的未知数位于泛萨拉萨-太平洋领域，这是一个曾经覆盖地球70%的现已消失的海洋领域。 这个项目将建立一个新的泛萨拉萨-太平洋板块重建回到中生代时代的新的限制地震层析成像-地震图像的地球？的斗篷。 该研究与一项教育计划相结合，该计划侧重于使用地球内部成像来帮助开发3D空间分析的基本但未充分利用的STEM技能，这是一项确定的核心地球科学技能。 外展工作优先通过本科课程开发，与当地市中心STEM磁铁高中的合作伙伴关系，并通过夏季本科生经验，接触历史上在科学领域代表性不足的群体。 该项目将建立一个断层扫描为主导的，完整的板块重建太平洋-泛地中海领域回到中生代，这将有助于与时间相关的运动学和构造边界条件的全球模型和区域研究。 使用非传统的断层摄影板块重建工作流程，包括断层摄影的板块3D映射、板块展开（逆变形）以及使用可用的运动学约束以分层方式将板块运动分配给展开的板块。 将层析板块重建模型与相关环太平洋地质数据集进行系统比较，并使用成熟代码CitcomS和TERRA的既定工作流程，作为两种不同地球动力学正演建模方法的输入边界条件进行进一步测试。 由此产生的板块模型将为地球的一半以上提供一个替代的俯冲历史，可以在其他全球模型中模拟。 此外，该项目还探索了地震层析成像技术在连接深部地幔和地球表面以实现4D地球演化方面的能力和局限性，这为NSF Tectonics确定的关键研究前沿提供了支持。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

NW Pacific‐Panthalassa Intra‐Oceanic Subduction During Mesozoic Times From Mantle Convection and Geoid Models

• DOI: 10.1029/2022gc010514
• 发表时间: 2021-04
• 期刊: Geochemistry
• 影响因子: 3.7
• 作者: Yi-An Lin;L. Colli;Jonny Wu

Structural characterization of the Phitsanulok basin, onshore Thailand, and regional tectonic implications

泰国陆上彭世洛盆地的构造特征及区域构造意义

• DOI: 10.1016/j.marpetgeo.2021.105110
• 发表时间: 2021
• 期刊: Marine and Petroleum Geology
• 影响因子: 4.2
• 作者: Amonpantang, Phinphorn;Wu, Jonny
• 通讯作者: Wu, Jonny

Intra-oceanic arc accretion along Northeast Asia during Early Cretaceous provides a plate tectonic context for North China craton destruction

• DOI: 10.1016/j.earscirev.2022.103952
• 发表时间: 2022-02
• 期刊: Earth-Science Reviews
• 影响因子: 12.1
• 作者: Jeremy Tsung Jui Wu;Jonny Wu;K. Okamoto

Raising the Resurrection plate from an unfolded-slab plate tectonic reconstruction of northwestern North America since early Cenozoic time

• DOI: 10.1130/b35677.1
• 发表时间: 2020-10
• 期刊: GSA Bulletin
• 作者: Spencer L. Fuston;Jonny Wu

Northwest Pacific-Izanagi plate tectonics since Cretaceous times from western Pacific mantle structure

• DOI: 10.1016/j.epsl.2022.117445
• 发表时间: 2022-04
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: Jonny Wu;Yi-An Lin;N. Flament;Jeremy Tsung Jui Wu;Yiduo Liu