Lithospheric Dripping in Central Tibet: Underappreciated Factor in Orogenic Plateau Development?

西藏中部岩石圈滴水:造山高原发育过程中被低估的因素?

基本信息

  • 批准号:
    2048656
  • 负责人:
  • 金额:
    $ 44.32万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2021
  • 资助国家:
    美国
  • 起止时间:
    2021-06-15 至 2025-05-31
  • 项目状态:
    未结题

项目摘要

The lower part of a continental plate is more dense than underlying asthenosphere. If it gets thickened as a result of plate convergence, such as within the India-Asia collision zone, it may become gravitationally unstable and sink into the deeper mantle as a large sheet or smaller-sized drips. This project will test the hypothesis that 45-20 million year old elliptical-shaped basins in central Tibet formed above sinking lithospheric drips, while mantle-derived volcanic rocks simultaneously erupted along the basin-bounding topographic bulges. If validated, the lithospheric drip theory would provide an appealing mechanism to explain the multitude of enigmatic elliptical basins found in all of Earth’s major orogenic plateaus. In collaboration with the University of Arizona’s Assistant Dean of Military and Veteran Engagement, this project will engage three undergraduate-student veterans in geological field and laboratory research. Military veterans are returning from active duty to college in increasing numbers and are underrepresented in the Science-Technology-Engineering-Math workforce. The effectiveness of the student-veteran engagement program will be assessed, along with which factors influence veteran career pathways, by delivering entrance and exit surveys. The project will also train two graduate students and facilitate continued academic, scientific, and cultural exchange among people and institutions in the United States, China, and Tibet.In addition to the lithospheric drip theory, the project will test the alternative hypotheses that Cenozoic shortening, volcanism, and basin formation in central Tibet are manifestations of (i) southward propagation of regional (600 km long) thrust systems and lithospheric thickening followed by lithospheric root removal or (ii) long-lived (active from Eocene through early Miocene time) ~200-250-km-long thrust belts and associated flexural loading across central Tibet, with unrelated mantle processes generating localized volcanic highlands. The hypotheses make distinct predictions about the temporal-spatial distribution of shortening, age of shortened basin fill relative to the age of adjacent volcanic rocks, basin geometries and the nature of their margins, and sedimentary provenance and dispersal patterns. A combination of geological mapping, basin analysis, structural analysis and restorations, and U-Pb igneous and detrital zircon geochronology will be employed to test these predictions. Field research will include the principal investigators, graduate students, undergraduate student-veterans, and collaborators from the Institute of Tibetan Plateau Research in Beijing, and will focus on Cenozoic geology within and between three basins in central Tibet. The spatial coverage will permit assessment of whether (i) shortening structures are localized to the basins or extend regionally along strike, (ii) the basins were previously integrated as long and narrow E-W or more regional basins, or developed throughout their history as isolated depocenters, and (iii) maximum basin subsidence and shortening were coeval with eruption of adjacent volcanic rocks. Ultimately, insofar as Tibet is the world’s archetypical collisional plateau, project results will have relevance for other orogenic plateaus worldwide.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.
大陆板块的下部比下面的软流圈更致密。如果它由于板块会聚而变厚,例如在印度-亚洲碰撞带内,它可能会变得重力不稳定,并以大片或较小尺寸的水滴沉入更深的地幔。该项目将检验一个假设,即西藏中部4500 - 2000万年前的椭圆形盆地形成于下沉的岩石圈滴状物之上,而幔源火山岩同时沿着盆地边界的地形隆起喷发。如果得到证实,岩石圈滴水理论将提供一个有吸引力的机制来解释在地球所有主要的造山高原中发现的众多神秘的椭圆形盆地。与亚利桑那大学军事和退伍军人事务助理院长合作,该项目将聘请三名本科生退伍军人从事地质领域和实验室研究。退伍军人从现役返回大学的人数越来越多,在科学技术工程数学劳动力中的代表性不足。学生退伍军人参与计划的有效性将进行评估,沿着哪些因素影响退伍军人的职业道路,通过提供入口和出口调查。该项目还将培养两名研究生,并促进美国、中国和西藏人民和机构之间持续的学术、科学和文化交流。除了岩石圈滴水理论外,该项目还将测试新生代缩短、火山作用、和盆地的形成是(i)区域性的向南传播,(600公里长)逆冲系统和岩石圈增厚,随后岩石圈根去除或(ii)长寿命(始新世至中新世早期活动)~200-250公里长的逆冲带和穿越西藏中部的相关挠曲载荷,与产生局部火山高地的不相关地幔过程。这些假说对缩短的时空分布、缩短的盆地充填相对于邻近火山岩年龄的年龄、盆地几何形状及其边缘的性质、沉积物源和扩散模式作出了明确的预测。将采用地质填图、盆地分析、构造分析和解释以及U-Pb火成岩和碎屑锆石年代学相结合的方法来检验这些预测。实地研究将包括主要研究人员,研究生,本科生退伍军人和来自北京青藏高原研究所的合作者,并将重点关注西藏中部三个盆地内和盆地之间的新生代地质。空间覆盖范围将允许评估(i)缩短结构是否局限于盆地或区域性沿着走向延伸,(ii)盆地先前整合为狭长的东西向或更多区域盆地,或在其历史上作为孤立的沉积中心发展,以及(iii)最大盆地沉降和缩短与邻近火山岩的喷发是同时代的。最终,西藏是世界上典型的碰撞高原,项目成果将与世界其他造山高原相关。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

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Where did the Arizona‐Plano Go? Protracted Thinning Via Upper‐ to Lower‐Crustal Processes
  • DOI:
    10.1029/2021jb023850
  • 发表时间:
    2022-03
  • 期刊:
  • 影响因子:
    0
  • 作者:
    G. Jepson;B. Carrapa;S. George;L. Reeher;P. Kapp;G. Davis;S. Thomson;C. Amadori;C. Clinkscales;Sean Jones;A. Gleadow;B. Kohn
  • 通讯作者:
    G. Jepson;B. Carrapa;S. George;L. Reeher;P. Kapp;G. Davis;S. Thomson;C. Amadori;C. Clinkscales;Sean Jones;A. Gleadow;B. Kohn
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Paul Kapp其他文献

Retention of medical officers in district health services, South Africa: a descriptive survey
南非地区卫生服务机构医务人员的保留:一项描述性调查
  • DOI:
    10.3399/bjgpo.2022.0047
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    R. Mash;B. Williams;Dusica Stapar;Gavin Hendricks;H. Steyn;Johan Schoevers;L. Wagner;Mumtaz Abbas;Paul Kapp;Stefanie Perold;S. Swartz;Werner Viljoen;M. Bello
  • 通讯作者:
    M. Bello
Age and geochemistry of western Hoh-Xil-Songpan-Ganzi granitoids, northern Tibet: Implications for the Mesozoic closure of the Paleo-Tethys ocean
藏北可可西里松潘甘孜西部花岗岩的年龄和地球化学:对古特提斯洋中生代闭合的启示
  • DOI:
    10.1016/j.lithos.2013.12.019
  • 发表时间:
    2014-03
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    Ren-Deng Shi;Mihai N. Ducea;Paul Kapp;Alan Chapman
  • 通讯作者:
    Alan Chapman
Wind erosion in northern China: Insights from the western Qaidam fold belt, Loess Plateau, and Hami Basin
中国北方的风蚀:来自柴达木西部褶皱带、黄土高原和哈密盆地的见解
  • DOI:
    10.1016/j.earscirev.2024.105037
  • 发表时间:
    2025-02-01
  • 期刊:
  • 影响因子:
    10.000
  • 作者:
    Paul Kapp;Alex Pullen;Jordan T. Abell;Liyun Zhang
  • 通讯作者:
    Liyun Zhang
Timing and mechanisms of Tibetan Plateau uplift
青藏高原隆升的时间和机制
  • DOI:
    10.1038/s43017-022-00318-4
  • 发表时间:
    2022-07-28
  • 期刊:
  • 影响因子:
    71.500
  • 作者:
    Lin Ding;Paul Kapp;Fulong Cai;Carmala N. Garzione;Zhongyu Xiong;Houqi Wang;Chao Wang
  • 通讯作者:
    Chao Wang
Mesozoic subduction accretion history in central Tibet constrained from provenance analysis of the Mugagangri Subduction Complex in the Bangong‐Nujiang suture zone
班公—怒江缝合带木嘎岗日俯冲杂岩物源分析制约藏中中生代俯冲增生历史
  • DOI:
    10.1029/2020tc006144
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    4.2
  • 作者:
    Anlin Ma;Xiumian Hu;Paul Kapp;Wen Lai;Zhong Han;Weiwei Xue
  • 通讯作者:
    Weiwei Xue

Paul Kapp的其他文献

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{{ truncateString('Paul Kapp', 18)}}的其他基金

Collaborative Research: Do subduction‐complex metamorphic rocks record the thermal evolution of a subduction zone or periods of anomalous tectonic activity? Baja California
合作研究:俯冲复杂变质岩是否记录了俯冲带的热演化或异常构造活动的时期?
  • 批准号:
    2127229
  • 财政年份:
    2022
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Standard Grant
Collaborative Research: Did the Pamir Gneiss Domes and Salient form by Northward Underthrusting of India or Southward Subduction and Rollback of Asia?
合作研究:帕米尔片麻岩穹丘和突出部是印度向北俯冲形成还是亚洲向南俯冲和回滚形成的?
  • 批准号:
    1419748
  • 财政年份:
    2014
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Continuing Grant
Collaborative Research: P2C2--Tracking Long-Term Glacial-Interglacial Wind Pattern Variability in Central Asia Using Geochemical Analysis of Aerosol Derived Detritus
合作研究:P2C2——利用气溶胶衍生碎屑的地球化学分析来追踪中亚的长期冰期-间冰期风型变化
  • 批准号:
    1203973
  • 财政年份:
    2012
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Standard Grant
Collaborative Research: The suturing process: Insight from the India-Asia collision zone
合作研究:缝合过程:印度-亚洲碰撞区的见解
  • 批准号:
    1008527
  • 财政年份:
    2011
  • 资助金额:
    $ 44.32万
  • 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:
    0808976
  • 财政年份:
    2008
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Standard Grant
Significance of Underplated Oceanic Melange in the Tectonic Evolution and Crustal Structure of Central Tibet
板下大洋混杂岩在藏中构造演化及地壳结构中的意义
  • 批准号:
    0438120
  • 财政年份:
    2005
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Continuing Grant
Cretaceous-Earliest Tertiary Basin Development, Deformation, and Magmatism in Southern Tibet: Implications for Pre-Indo-Asian Collision Lithospheric Structure
藏南白垩纪-最早第三纪盆地的发育、变形和岩浆作用:对印支前碰撞岩石圈结构的影响
  • 批准号:
    0309844
  • 财政年份:
    2003
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Continuing Grant

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Development of High-Quality Thin Film Low-Temperature Formation Technology by Aerial Heating Dripping Method
空中加热滴下法高质量薄膜低温成膜技术的开发
  • 批准号:
    20K14781
  • 财政年份:
    2020
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    $ 44.32万
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    Grant-in-Aid for Early-Career Scientists
Characterization and prediction of dripping of liquid films flowing underneath planar surfaces and on tilted cylinders
平面下方和倾斜圆柱体上流动的液膜滴落的表征和预测
  • 批准号:
    418676633
  • 财政年份:
    2018
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    Research Grants
Modeling of Combustion over Melting/dripping Molten Polymer
熔融/滴落熔融聚合物燃烧的模拟
  • 批准号:
    17H02051
  • 财政年份:
    2017
  • 资助金额:
    $ 44.32万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Investigation on the Dripping Behavior of Primary Slag Melt in the Cohesive Zone of the Blast Furnace Through Iron or Oxide Funnel
高炉粘性区一次炉渣熔体通过铁或氧化物漏斗滴落行为的研究
  • 批准号:
    09650801
  • 财政年份:
    1997
  • 资助金额:
    $ 44.32万
  • 项目类别:
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