Electromagnetic and Tomographic Research of Melt below EPR

EPR 下熔体的电磁和层析成像研究

基本信息

  • 批准号:
    07041089
  • 负责人:
  • 金额:
    $ 11.07万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for international Scientific Research
  • 财政年份:
    1995
  • 资助国家:
    日本
  • 起止时间:
    1995 至 1997
  • 项目状态:
    已结题

项目摘要

As for geophysical measurements around the East Pacific Rise (EPR four Ocean Bottom Electro Magnetometers (OBEMs) were successfully retrieved during a research cruise from the end of May/'97 through the beginning of July/'97 by R/V Melville of Scripps Institution of Oceangraphy, US,to yield electromagnetic (EM) time series at the seafloor for more than one year. The OBEMs have been installed at 17゚S of EPR during a previous research cruise from the middle of May/'96 through the beginning of July/'96, which was also an international cruise coordinated by Mantle ELectromagnetic and Tomography (MELT) Project. The EM data from these seafloor units are now being analyzed together with those simultaneously collected by US and Australian groups. The goal of the analyzes and subsequent modellings/inversions is reveal the EM structure of melt bodies just below the super spreading center. Specifically, this research aims at quantifying the geometry, melt fraction and connectedness of the melt bodies by a joint observation of seismics and magnetotellurics at the seafloor.In terms of study of the very old oceanic crust in Archaen, rock sampling was conducted in South Africa and Zimbabwe this year. The samples collected are either igneous or sedimentary rocks as old as 2,500 to 3,500 Ma. These samples are in the course of petrological, geological and paleomagnetic analyzes to yield estimates of the tectonic activity at the seafloor and Earth's geomagnetic field in Archaen, which will be combined with the results from the samples collected in Australia ('95) and in Canada ('96) to give reconstruction of a worldwide view of the Earth in Archaen.
至于东太平洋海隆周围的地球物理测量(EPR),美国斯克里普斯海洋研究所的R/V Melville在1997年5月底至1997年7月初的一次研究巡航期间成功地探测到了四个海底电磁磁强计,以得出一年多来海底的电磁(EM)时间序列。在96年5月中旬至96年7月初的前一次研究巡航期间,OBEM已安装在EPR的17゚S,那也是由地幔电磁和层析成像(MELT)项目协调的国际巡航。来自这些海底单元的EM数据现在正与美国和澳大利亚小组同时收集的数据一起进行分析。分析和后续模拟/反演的目标是揭示位于超级扩展中心下方的熔体的电磁结构。具体地说,这项研究旨在通过在海底进行地震和大地电磁联合观测来量化熔体的几何形状、熔体比例和连通性。在研究太古宙非常古老的洋壳方面,今年在南非和津巴布韦进行了岩石采样。采集的样品要么是火成岩,要么是沉积岩,年龄在2500至3500 Ma之间。这些样品正在进行岩石学、地质学和古地磁分析,以估计太古代海底的构造活动和地球的地磁场,这些估计将与在澳大利亚(‘95)和加拿大(’96)收集的样品的结果相结合,以重建太古宙地球的世界观。

项目成果

期刊论文数量(26)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Toh.H and J.Segawa: "Auomalies of geomagnetic and geoeleedric Variations of the seafloor aroun the Ign-Oghsawara arc." Bull.Ocean.Res.Inst.32. 3-368 (1995)
Toh.H 和 J.Sekawa:“Ign-Oghsawara 弧周围海底的地磁和地电变化异常。”
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    0
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Hirose,K.: "Melfing exporiments on lhorsolity KLB-1 undor hydrous conditions and deueration of high-meyresmede sific melts" Geology. 25. 42-44 (1977)
Hirose,K.:“在含水条件下对 KLB-1 的熔化实验和高 Meyresmede 熔体的除水”地质学。
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    0
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Yamano, M., Kinoshita, M., and Goto, S.: "Long-term monitoring oftemperature profiles in sea floor sediments" Proc. Int. Workshop on Scientific Use of Submarine Cables. 62-66 (1997)
Yamano, M.、Kinoshita, M. 和 Goto, S.:“海底沉积物温度剖面的长期监测”Proc。
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    0
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G. Kimura, S. Maruyama, Y. Isozaki and M. Terabayashi: "Well-preserved underplanting structure of the jadeitized Franciscan complex, pacheco Pass, California" Geology. 24. 75-78 (1995)
G. Kimura、S. Maruyama、Y. Isozaki 和 M. Terabayashi:“加利福尼亚州帕切科山口翡翠化的方济各会建筑群保存完好的地下结构”地质学。
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    0
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Toh, H.and M.Uyeshima: "One-dimensional model study of the PNG dataset using site-independent Groom-Bailey decomposition" J.Geomag.Geoelectr.49. 843-856 (1997)
Toh、H. 和 M.Uyeshima:“使用与站点无关的 Groom-Bailey 分解对 PNG 数据集进行一维模型研究”J.Geomag.Geolectr.49。
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HAMANO Yozo其他文献

HAMANO Yozo的其他文献

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{{ truncateString('HAMANO Yozo', 18)}}的其他基金

Exploration of the shallow electrical conductivity structure below seafloor by using the ocean dynamo effect
利用海洋发电机效应探索海底以下浅层导电结构
  • 批准号:
    25610136
  • 财政年份:
    2013
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Research on the process of generation and propagation of tsunamis based on the newly developed ocean bottom apparatus
基于新研制的海底装置研究海啸发生和传播过程
  • 批准号:
    24340108
  • 财政年份:
    2012
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Determination of the energy dissipation in the Geodynamo
地球发电机能量耗散的测定
  • 批准号:
    21244071
  • 财政年份:
    2009
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Turbulence in the Earth's outer core
地球外核的湍流
  • 批准号:
    18204038
  • 财政年份:
    2006
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Numerical modeling of earth evolution based on heat and mass transport focusing on downwelling mantle flows
基于热质传输的地球演化数值模拟,重点关注下涌地幔流
  • 批准号:
    16075205
  • 财政年份:
    2004
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas
Verification of the geomagnetic secular variation models based on laboratory experiments and numerical simulations.
基于实验室实验和数值模拟的地磁长期变化模型的验证。
  • 批准号:
    15204038
  • 财政年份:
    2003
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Study of the geomagnetic variation and its relation to climate change
地磁变化及其与气候变化关系的研究
  • 批准号:
    12440118
  • 财政年份:
    2000
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study of the Evolutional History of the Earth based on the Paleomagnetic Observations of the Archean Geomagnetic variations
基于太古代地磁变化的古地磁观测研究地球演化史
  • 批准号:
    06452076
  • 财政年份:
    1994
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Development of Ocean Bottom Electromagnetic Measurement System and Three-dimensional Structure of the Transition Zone between the Ocan and the Continent
海底电磁测量系统研制及海洋与大陆过渡带三维结构
  • 批准号:
    62840009
  • 财政年份:
    1987
  • 资助金额:
    $ 11.07万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research
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