Time and Temperature Stability of Magnetization- a Study on Magnetite and Titanomagnetite Prepared by the Glass-Ceramic Method
Time and Temperature Stability of Magnetization- a Study on Magnetite and Titanomagnetite Prepared by the Glass-Ceramic Method
批准号:
8804853
负责人:
Subir Banerjee
金额:
$11.55万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1988
资助国家:
美国
项目状态:
已结题
起止时间:
1988-10-15 至 1991-09-30
中文摘要
在Asilomar岩石磁性研讨会(9月16日至19日, 1986年,人们一致认为, 影响地磁场的古地磁问题 生成和反转,大陆边缘的构造, 前寒武纪大陆漂移需要我们的 了解时间和温度对 纯磁铁矿和钛磁铁矿的磁化强度。 的材料 合成技术,即玻璃陶瓷法, 尺寸范围从50 nm到100 nm的分散良好的单晶 在非磁性基质材料中的磁性纳米颗粒已经被开发出来。 这些 样品(和其他新合成的样品)将用于研究 外加磁场、温度和内应力对 热粘性磁化的获得和稳定性。 实验将揭示畴壁/应力 通过“失调”或“后效”现象相互作用 对于多畴样品是重要的, 我们已经证明的属性是无法解释的现有 理论 结果也将是相关的最好的和可能的 改进热古强度方法,目前的问题是 相当大的争议。
英文摘要
At the Asilomar Workshop on Rock Magnetism (September 16-19, 1986) it was unanimously agreed that the next generation of paleomagnetic problems which impact on geomagnetic field generation and reversal, tectonics of continental margins and Precambrian continental drift require a major increase in our knowledge of the effects of time and temperature on the magnetization of pure magnetite and titanomagnetite. A materials synthesis technique, the glass-ceramic method, which produces well dispersed single crystals ranging in size from 50 nm to 100 um in a non-magnetic matrix material has been developed. These samples (and other newly synthesized ones) will be used to study the effects of applied field, temperature and internal stress on the acquisition and stability of thermo-viscous magnetization. The experiments will reveal whether domain wall/stress interaction through "disacommodation" or "aftereffect" phenomenon is important for multidomain samples whose thermomagnetic properties we have shown to be not explicable with existing theories. The results will also be relevant to best and possibly improve thermal paleointensity methods, presently a matter of considerable controversy.
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Acquisition of a DC-SQUID magnetometer
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批准号:0647852
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2007
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负责人:Subir Banerjee
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依托单位:
Collaborative Proposal for Facility Support: Development and Maintenance of the Magnetics Information Consortium (MagIC)
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批准号:0317922
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项目类别:Continuing Grant
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资助金额:$13.89万
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财政年份:2003
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负责人:Subir Banerjee
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依托单位:
Collaborative Research: Sediment Nanomagnetism and Environmental Change: The Microbial Mineral Link
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批准号:0311869
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项目类别:Standard Grant
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资助金额:$29.93万
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财政年份:2003
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负责人:Subir Banerjee
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依托单位:
Continuation of a Facility: Institute for Rock Magnetism
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批准号:0218384
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项目类别:Continuing Grant
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资助金额:$189.65万
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财政年份:2002
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负责人:Subir Banerjee
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依托单位:
Pathways of Environmental Diagenesis and Their Effects on the Acquisition of Natural Remanent Magnetization Recorded in Chinese Loess and Paleosol
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批准号:0003421
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项目类别:Standard Grant
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资助金额:$16.5万
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财政年份:2001
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负责人:Subir Banerjee
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依托单位:
Development of Magnetic Signatures of Soil Erosion and Eolian Dust: Application To Decadal Scale Holocene Climate Change
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批准号:9909523
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项目类别:Continuing Grant
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资助金额:$18.43万
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财政年份:2000
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负责人:Subir Banerjee
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依托单位:
Continuation of a Facility: Institute for Rock Magnetism
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批准号:9818704
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项目类别:Continuing Grant
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资助金额:$95.13万
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财政年份:1999
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负责人:Subir Banerjee
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依托单位:
ESH: Magnetic Studies of Lake Sediments: Climate Variability in Alaska During the Last 14,000 Years
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批准号:9809150
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项目类别:Standard Grant
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资助金额:$13.25万
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财政年份:1998
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负责人:Subir Banerjee
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依托单位:
Equipment Acquisition and Upgrades, Institute for Rock Magnetism
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批准号:9807021
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项目类别:Standard Grant
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资助金额:$18.85万
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财政年份:1998
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负责人:Subir Banerjee
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依托单位:
Holocene Paleoenvironmental Change Along the Antarctic Peninsula: A Test of the Bipolar/Solar Signal
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批准号:9615695
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项目类别:Standard Grant
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资助金额:$5.09万
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财政年份:1997
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负责人:Subir Banerjee
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依托单位:
Late Pleistocene Continental Climate Reconstruction: Magnetic, Sedimentological, and Geochemical Proxies from Ice-Sheet-Margin Sediments
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批准号:9526827
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项目类别:Standard Grant
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资助金额:$12.52万
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财政年份:1996
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负责人:Subir Banerjee
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依托单位:
Santa Fe III: A Proposed Workshop in Paleorecords of Geomagnetic Field and Climate Change for Rock Magnetists, Paleomagnetists, and Related Specialists
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批准号:9633514
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项目类别:Standard Grant
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资助金额:$1.1万
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财政年份:1996
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负责人:Subir Banerjee
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依托单位:
Continuation of a Facility: Institute for Rock Magnetism
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批准号:9628693
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项目类别:Continuing Grant
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资助金额:$88.72万
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财政年份:1996
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负责人:Subir Banerjee
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依托单位:
Development of Multi-Parameter Rock Magnetic Proxies of Climate Change: Application to Pittsburg Basin, Southern Illinois
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批准号:9508055
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项目类别:Continuing Grant
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资助金额:$10.31万
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财政年份:1995
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负责人:Subir Banerjee
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依托单位:
Santa Fe II Conference "Remagnetization and Environmental Rock Magnetism: Clues to Records of Past Geodynamics and Global Change"; June 23-26, 1994; Sanata Fe, New Mexico
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批准号:9406181
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项目类别:Standard Grant
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资助金额:$1.6万
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财政年份:1994
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负责人:Subir Banerjee
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依托单位:
Continuation of a Facility: Institute for Rock Magnetism
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批准号:9304363
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项目类别:Continuing Grant
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资助金额:$83.32万
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财政年份:1993
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负责人:Subir Banerjee
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依托单位:
Paleoclimate Change in China: Rock Magnetic Indicators and Their Validation
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批准号:9206024
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项目类别:Continuing Grant
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资助金额:$21.92万
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财政年份:1992
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负责人:Subir Banerjee
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依托单位:
Asilomar II Conference: Effects of Chemical Change on Magnetization of Minerals, Rocks and Sediments
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批准号:9215534
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项目类别:Standard Grant
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资助金额:$2.31万
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财政年份:1992
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负责人:Subir Banerjee
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依托单位:
Sediment Matrix Control of Magnetization: Effects on Inclination Error and Intensity
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批准号:9005776
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项目类别:Continuing Grant
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资助金额:$11.91万
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财政年份:1991
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负责人:Subir Banerjee
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依托单位:
A Comparative Rockmagnetic and Calcite Strain Study of Deformation, Diagenesis, and Remagnetization of Paleozoic Cratonic Carbonates
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批准号:9005075
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项目类别:Continuing Grant
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资助金额:$12.99万
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财政年份:1990
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负责人:Subir Banerjee
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依托单位:
海外基金