Mechanism of Emplacement of Flood Basalt

溢流玄武岩侵位机理

基本信息

  • 批准号:
    9706396
  • 负责人:
  • 金额:
    $ 1.99万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    1997
  • 资助国家:
    美国
  • 起止时间:
    1997-06-15 至 1999-05-31
  • 项目状态:
    已结题

项目摘要

9706396 Coe Flood basalts are the second most significant accumulation of mafic igneous material on the surface of the Earth, and their rate of eruption has long been considered to be three to four orders of magnitude greater than occurs at present-day central basaltic volcanoes. This idea depends on the assumption that a single flow is emplaced without significant interruption. Recently it has been proposed that such flows may have grown endogenously, that is, in a multistage process by which lava is injected into the interior of an already solidified flow and jacks up the top surface. If endogenous growth is a common mechanism of emplacement, it would reduce the enormous eruption rates and associated rapid production or storage of vast quantities of melt that are required for single-stage emplacement of very large individual lava flows characteristic of these provinces. Our pilot project is to test the hypothesis of endogenous growth by determining the magnetic fabric of the Birkett flow of the Columbia River Flood Basalts, for which field observations of interior vesicle layers have already suggested the possibility of multistage emplacement. Magnetic fabric analysis can detect zones where more intense shear occurred during flow: for multistage emplacement, two or more shear boundaries should be present inside the flow. If the vesicular layers coincide with shear boundaries, consistent with the injection of lava after initial solidification, the stage will be set for a larger investigation of the role of endogenous growth in continental flood basalts.
9706396 Coe Flood 玄武岩是地球表面第二大的镁铁质火成岩堆积物,长期以来,它们的喷发速度一直被认为比当今中部玄武岩火山的喷发速度高出三到四个数量级。这个想法取决于这样的假设:单个流的放置没有明显的中断。最近有人提出,这种流可能是内生生长的,即,在多阶段过程中,熔岩被注入已经凝固的流的内部并顶起顶部表面。如果内生增长是一种常见的就位机制,那么它将降低巨大的喷发率以及相关的大量熔体的快速产生或储存,而这些熔体是这些省份特有的非常大的单独熔岩流的单阶段就位所需的。我们的试点项目是通过确定哥伦比亚河溢流玄武岩 Birkett 流的磁性结构来测试内生生长的假设,对此内部囊泡层的现场观察已经表明了多级安置的可能性。磁性织物分析可以检测流动过程中发生更强烈剪切的区域:对于多级安置,流动内部应存在两个或多个剪切边界。如果泡状层与剪切边界一致,与初始凝固后熔岩的注入一致,则将为更大规模地研究大陆溢流玄武岩内生生长的作用奠定基础。

项目成果

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Robert Coe其他文献

P011. Levels of evidence in plastic surgery – Trends and comparison with five other surgical specialties
  • DOI:
    10.1016/j.ejso.2015.03.047
  • 发表时间:
    2015-06-01
  • 期刊:
  • 影响因子:
  • 作者:
    Riaz Agha;Mariana Devesa;Katharine Whitehurst;Alexander J. Fowler;Robert Coe;Georgie Wellstead;Dennis P. Orgill;Peter McCulloch
  • 通讯作者:
    Peter McCulloch
A structural analysis of students' epistemic views
  • DOI:
    10.1007/bf01284530
  • 发表时间:
    1994-07-01
  • 期刊:
  • 影响因子:
    1.900
  • 作者:
    Kenneth Ruthven;Robert Coe
  • 通讯作者:
    Robert Coe
Technology use and integration in state-funded primary schools: a structural equation model
公立小学的技术使用和整合:结构方程模型
  • DOI:
    10.1080/03004279.2024.2351013
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    1
  • 作者:
    O. Ventista;Paraskevi Tsani;Chris Brown;Robert Coe;Georgios Polydoros
  • 通讯作者:
    Georgios Polydoros
Levels of Evidence in Plastic Surgery: Trends and Comparison with 5 Other Surgical Specialties
  • DOI:
    10.1016/j.jamcollsurg.2015.07.270
  • 发表时间:
    2015-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Katharine Whitehurst;Riaz A. Agha;Mariana Devesa;Alexander Fowler;Robert Coe;Georgina Wellstead;Dennis P. Orgill;Peter McCulloch
  • 通讯作者:
    Peter McCulloch
Educational Performance over Time: Changes in Mathematical Attainment between 1976 and 2009 in England
随时间变化的教育表现:1976 年至 2009 年英国数学成绩的变化

Robert Coe的其他文献

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{{ truncateString('Robert Coe', 18)}}的其他基金

Collaborative Research: An EARTHTIME Chronology for the Matuyama-Brunhes Geomagnetic Field Reversal
合作研究:松山-布伦赫斯地磁场反转的地球时间年表
  • 批准号:
    1250353
  • 财政年份:
    2013
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Standard Grant
Development of a 0.5 Tesla AF Demagnetizer
0.5特斯拉AF消磁机的开发
  • 批准号:
    1053399
  • 财政年份:
    2012
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Continuing Grant
A Composite Steens Mountain Reversal Record and the Very-Rapid-Field-Change Hypothesis
复合斯廷斯山反转记录和极快速场变化假说
  • 批准号:
    0711418
  • 财政年份:
    2007
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Standard Grant
How Complex are Geomagnetic Reversals? Tracking the Steens Reversal in Yellowstone Hotspot Lavas to Construct a Composite Record
地磁反转有多复杂?
  • 批准号:
    0310316
  • 财政年份:
    2003
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Continuing Grant
Analysis of Geodynamo Simulations and Comparison with Paleomagnetic Data
地球发电机模拟分析及与古地磁数据的比较
  • 批准号:
    9903194
  • 财政年份:
    1999
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Standard Grant
Upgrading of a Superconducting Rock Magnetometer
超导岩石磁力计的升级
  • 批准号:
    9727706
  • 财政年份:
    1998
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Standard Grant
Paleomagnetic and Rock Magnetic Investigations of Phanerozoic Rock Units from Central Asian Foldbelt, Siberia, Russia
俄罗斯西伯利亚中亚褶皱带显生宙岩石单元的古地磁和岩磁研究
  • 批准号:
    9805444
  • 财政年份:
    1998
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Standard Grant
Testing and Extending the Paleomagnetic Record at Steens Mountain
测试和扩展斯蒂斯山的古地磁记录
  • 批准号:
    9526553
  • 财政年份:
    1996
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Continuing Grant
A Case Study of Fidelity of Sedimentary Magnetization
沉积物磁化保真度的案例研究
  • 批准号:
    9508213
  • 财政年份:
    1995
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Continuing Grant
A Paleomagnetic Study of Early and Middle Paleozoic Rocks in Tarim and Nantianshan Terrane, Northwestern China
塔里木及南天山地体早、中古生代岩石的古地磁研究
  • 批准号:
    9419269
  • 财政年份:
    1995
  • 资助金额:
    $ 1.99万
  • 项目类别:
    Continuing Grant

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下德干圈闭的快速侵位及其对晚白垩世气候变化的影响
  • 批准号:
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苏格兰的撞击坑:对重大撞击事件的就位、沉积学和环境影响进行现场调查。
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