HIGH-PRESSURE EXPERIMENTAL STUDIES ON THE ORIGIN OF LAYERED STRUCTURE OF THE EARTH
地球层状结构起源的高压实验研究
基本信息
- 批准号:11440133
- 负责人:
- 金额:$ 9.47万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B).
- 财政年份:1999
- 资助国家:日本
- 起止时间:1999 至 2000
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In situ X-ray study at high-pressure and high-temperature has been developed using the synchrotron radiation at SPring-8 and a multi-anvil apparatus (MA) equipped with sintered diamond (SD). Pressures to 49 GPa were generated over ca 4 mm^3. Using this systems stability and thermoelastic properties of the cubic SnO_2 (Pa3-) were determined up to 29 GPa and 1500 K.Exploration of 5th polymorph of iron "β-Fe" has been carried out. No evidence of β-Fesofar, but ε-phase is stable up to ca 40 GPa and 1700K.Melting experiments on natural peridotite were carried out up to 35 GPa. It has been found that the first liquidus phase changes from magnesiowustite (Mw) to Mg-perovskite (Mg-Pv) at 31 GPa with increase of pressure. At pressures higher than 33 GPa (deeper than 1000 km in the mantle), Mg-Pv, Mw and Ca-Pv coexist with liquid at temperatures between solidus and liquidus. Mass balance regression analysis suggest that differentiation of 34% Mg-Pv and 3% Ca-Pv from the primitive mantle consistently form the peridotitic material. Fractionation of Mg-Pv and Ca-Pv would have formed an dense and hot region on the bottom of the mantle characterized as an enriched geochemical reservoir. Partioning of Ni and Co between molten iron, and silicate liquid, Mg-Pv and Mw were examined up to 29 GPa The experimental results suggest that core formation in a 1000km-depth magma ocean is consistent with the observed partitioning data of Ni and Co between the mantle and core.
利用SPring-8同步辐射装置和装有烧结金刚石(SD)的多砧装置(MA),进行了高温高压下的原位X射线研究。在约4立方毫米的空间内产生了49 GPa的压力。利用该系统测定了立方SnO_2(Pa ~(3-))在29 GPa和1500 K范围内的稳定性和热弹性性质,并对铁的第五多晶型“β-Fe”进行了探索。在40 GPa和1700 K下,ε相稳定,没有β-FeSOFA的存在。结果表明,在31 GPa压力下,随着压力的增加,第一液相线相由镁橄榄石(Mw)转变为镁钙钛矿(Mg-Pv)。在高于33 GPa的压力下(地幔深度超过1000 km),Mg-Pv,Mw和Ca-Pv在固相线和液相线之间的温度下与液体共存。质量平衡回归分析表明,橄榄岩物质由34% Mg-Pv和3% Ca-Pv从原始地幔分异而来。Mg-Pv和Ca-Pv的分馏作用在地幔底部形成了一个致密的热区域,具有富集地球化学储集的特征。在29 GPa压力下对Ni、Co在熔融铁和硅酸盐液体之间的分配、Mg-Pv和Mw进行了研究。实验结果表明,在1000 km深的岩浆洋中形成的核与Ni、Co在地幔和核之间的分配数据是一致的。
项目成果
期刊论文数量(46)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
X. Xue & M. Kanzaki: "NMR characteristics of possible oxygen sites in aluminosilicate glasses and melts : an ab initio study"J. Phys. Chem B. 103. 10816-10830 (1999)
薛旭
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Walter,M.J.: "Screws tighten on the core. News and Reviews"Nature. 398. 563 (2000)
沃尔特,M.J.:“螺丝拧紧了核心。新闻和评论”自然。
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Xue, X., et al.: "An ab initio calculation of 17O and 29Si NMR parameters for SiO2 polymorphs"Solid State NMR. 16. 245-259 (2000)
Xu, X., 等人:“SiO2 多晶型物的 17O 和 29Si NMR 参数的从头计算”固态 NMR。
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M. Yoshikawa & E. Nakamura: "Geochemical evolution of Horoman peridotite complex : Implications for melt extraction, metasomatism and compositional layering in the mantle"J. Gerphys. Res.. 105. 2879-2901 (2000)
吉川先生
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A. Nakatsuka, A. Yoshiasa, T. Yamanaka, T. Katura & E. Ito: "Symmetry change of majorite solid solution in the system Mg_3Al_2Si_3O_<12>-MgSiO_3"Am. Mineral.. 84. 1135-1143 (1999)
A.中冢、A.吉浅、T.山中、T.卡图拉
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{{ truncateString('ITO Eiji', 18)}}的其他基金
Cultural similarities and differences in the effects of constraints to and constraint negotiation of leisure-time physical activity on psychological well-being
休闲体育活动约束和约束谈判对心理健康影响的文化异同
- 批准号:
26882037 - 财政年份:2014
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for Research Activity Start-up
An Experimental Study on Early Evolution of the Earth and the Structure of the Lower mantle
地球早期演化与下地幔结构的实验研究
- 批准号:
17204048 - 财政年份:2005
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
An Experimental Study on the Origin and Dynamics of the Earth's Lower Mantle
地球下地幔起源和动力学的实验研究
- 批准号:
13852005 - 财政年份:2001
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for Scientific Research (S)
Experimental Studies of Early Differentiation and Evolution of the Earth
地球早期分化和演化的实验研究
- 批准号:
05102003 - 财政年份:1993
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for Specially Promoted Research
High-pressure on the structure and dynamics of the deep earth's interior.
高压对地球深层内部结构和动力学的影响。
- 批准号:
01460052 - 财政年份:1989
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Eperimental studies on the structure of the lower mantle and themantle fractionation
下地幔结构及上地幔分异的实验研究
- 批准号:
62540621 - 财政年份:1988
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Investigation on the linkage units between cell surface substances
细胞表面物质之间连接单元的研究
- 批准号:
59470128 - 财政年份:1984
- 资助金额:
$ 9.47万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)