Accurate and rapid measurements of thermodynamic properties of minerals by microcalorimetric method.
采用微量热法准确快速测量矿物的热力学性质。
基本信息
- 批准号:60840023
- 负责人:
- 金额:$ 2.94万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Developmental Scientific Research
- 财政年份:1985
- 资助国家:日本
- 起止时间:1985 至 1986
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. Heat capacities of high-pressure silicate minerals were measured by the differencial scanning calorimeter which was installed by the grant-in-aid for scientific research. The data processing system using the personal computor was made for rapid and accurate calculation of the heat capacity measured by the differencial scanning calorimeter. Garnet solid solutions containing pyroxene components are stable in the pressure-temperature conditions in the mantle transition zone. Heat capacities of the garnet solid solutions in the system <Mg_4> <Si_4> <O_(12)> - <Mg_3> <Al_2> <Si_3> <O_(12)> , which represent the garnets in the transition zone, were measured by the present heat capacity measurement system. It was observed that heat capacity of the garnet solid solution at each temperature changed very little with increasing <Mg_4> <Si_4> <O_(12)> component. The Gruneisen parameter and Debye temperature of the garnet solid solutions were estimated from the heat capacity data.2. Enthalpies of silicates and germanates stable at high pressures were measured. Enthalpies of transition of the silicates and germanates were obtained for the following systems:(1) rhodonite-clinopyroxene-garnet transitions in MnSi <O_3> , (2) wollastonite-garnet-perovskite transitions in CaGe <O_3> , (3) pyroxenoid-garnet-ilmenite-perovskite transitions in CdGe <O_3> , (4) pyroxene-garnet transition in the system <Mg_4> <Si_4> <O_(12)> - <Mg_3> <Al_2> <Si_3> <O_(12)> .Phase boundaries for the above transitions were calculated from the measured enthalpies.They were almost consistent with the boundaries determined by the phase equilibrium experiments. It was established that the pyroxene(or pyroxenoid)- garnet transitions have generally gentle positive dP/dT slopes, while the ilmenite (or garnet)-perovskite transitions have negative slopes.
1.利用科研资助项目安装的差示扫描量热仪,测定了高压硅酸盐矿物的热容。为快速准确地计算差示扫描量热仪测得的热容,研制了微机数据处理系统。含辉石组分的石榴石固溶体在地幔过渡带的压温条件下是稳定的。用<Mg_4>本热容测量系统测量了<Si_4><O_(12)> -<Mg_3><Al_2><Si_3><O_(12)>体系中石榴石固溶体的热容,这一体系代表了过渡区的石榴石。实验结果表明,随着<O_(12)>组分的增加,石榴石固溶体在各温度下的热容变化不大<Mg_4><Si_4>。由热容数据估算了石榴石固溶体的Gruneisen参数和德拜温度.测量了在高压下稳定的硅酸盐和锗酸盐的焓。计算了MnSi中蔷薇辉石-单斜辉石-石榴石,<O_3>CaGe中硅灰石-石榴石-钙钛矿,CdGe中辉石-石榴石-钛铁矿<O_3><O_3><Mg_4>-钙钛矿,<Si_4><O_(12)> - <O_(12)<Mg_3><Al_2><Si_3>>中辉石-石榴石的相变焓,并计算了上述相变的相边界,与相平衡实验确定的相边界基本一致。已经确定辉石(或辉石状)-石榴石转变通常具有平缓的正dP/dT斜率,而钛铁矿(或石榴石)-钙钛矿转变具有负斜率。
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)
Akaogi,M edited by M.H.Manghnani;Y.Syono: High-Pressure Research in Mineral Physics,Terra Sci.Publ.(1987)
Akaogi,M 由 M.H.Manghnani 编辑;Y.Syono:矿物物理高压研究,Terra Sci.Publ.(1987)
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
Ross,N.L.: Journal of Geophysical Research.91. 4685-4696 (1986)
Ross,N.L.:地球物理研究杂志.91。
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- 影响因子:0
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AKAOGI Masaki其他文献
AKAOGI Masaki的其他文献
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{{ truncateString('AKAOGI Masaki', 18)}}的其他基金
High-pressure phase equilibria and thermodynamics of mantle minerals: postspinel and postperovskite
地幔矿物的高压相平衡和热力学:后尖晶石和后钙钛矿
- 批准号:
22340163 - 财政年份:2010
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
High-pressure phase equilibria and thermodynamic properties of silicate minerals and related materials in the lower mantle conditions
下地幔条件下硅酸盐矿物及相关材料的高压相平衡和热力学性质
- 批准号:
19340166 - 财政年份:2007
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
High pressure phase equilibria of constituent minerals of mantle and oceanic crust, and chemical heterogeneity of deep mantle
地幔和洋壳组成矿物的高压相平衡及深部地幔化学非均质性
- 批准号:
15204049 - 财政年份:2003
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Phase Transformations and Thermodynamic Properties of Constituent Minerals of Slabs in the Lower Mantle
下地幔板片组成矿物的相变和热力学性质
- 批准号:
11440162 - 财政年份:1999
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Phase Transitions and Melting of Minerals at Ultrahigh Pressures and Chemical Evolution of the Mantle
超高压下矿物的相变和熔化以及地幔的化学演化
- 批准号:
08404034 - 财政年份:1996
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Study on deep structure and dynamics of the mantle by calorimetric measurements of high pressure silicates
高压硅酸盐量热测量研究地幔深层结构和动力学
- 批准号:
03453058 - 财政年份:1991
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Development of anvil with sintered diamond core for high pressure high temperature experiments
高压高温实验用烧结金刚石芯砧座的研制
- 批准号:
01840029 - 财政年份:1989
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research
Accurate determination of phase equilibrium diagrams by calorimetric measurements of high pressure silicate minerals and applications to structure of the earth's mantle.
通过高压硅酸盐矿物的量热测量准确确定相平衡图及其在地幔结构中的应用。
- 批准号:
62540618 - 财政年份:1987
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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一种新的科学装置,用于同时测定与温度相关的热特性:热扩散率、导热率和热容量
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