A newly designed and constructed experimental apparatus for vaporization and condensation of minerals in the solar nebula.
| Project/Area Number |
61840025
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
鉱物学(含岩石・鉱床学)
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| Research Institution | Kyoto University |
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Principal Investigator |
TSUCHIYAMA Akira Fuculty of Cience, Kyoto University, 理学部, 助手 (90180017)
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| Co-Investigator(Kenkyū-buntansha) |
TORII Masayuki Fuculty of Science, Kyto University (, 理学部, 助手 (60108983)
KITAMURA Masao Fuculty of Science, Kyoto University (, 理学部, 助教授 (70004489)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥9,600,000 (Direct Cost: ¥9,600,000)
Fiscal Year 1987: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1986: ¥8,600,000 (Direct Cost: ¥8,600,000)
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| Keywords | Primodial solar nebula / Vaporization / Condensation / Silicate Minerals / Solid planets / Meteorites / Vauum furnace for vaporization and condensation / Vaporization-condensation experiments / Forsterite / VLS mechanism / ウィスカー / 蒸発残査 / 凝縮物 |
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| Research Abstract |
Condensation of mineral grains from gas at high temperatures took place in the primodial solar nebula, and solid planets, such as the earth, and meteorites were formed by accretion of these grains. It is considered that solid-liquid reactions, such as vaporization and condensation, played an important role in chemical and mineralogical fractionation in the nebula. Irrespective of the significance of the reactions, however, little experimental work has been done especially on condendsation.
In the present research project, an experimental system was successively established to study vaporization and condensation of minerals near the primodial solar conditions. In the first year, a vacuum furnace for vaporization and condensation (AYUMI EC300) was made and calibrated. At the beginning, accidents happened usually in a heater part, Hich was specially designed for heating a large sample chamber. In the second year, the heater part was improved and fixed, and several results were obtained from experiments by using this furnace.
The experiments were carried out in the system Mg_2 SiO_4 -H_2 , Hich mimics the solar composition. Conditions for the condensation were determined, and it was concluded that the condensation is controlled mainly by temperature and forsterite whiskers can grow by the VLS mechanism. Large amounts of samples can be treated in tghis furnace, and this makes it very easy to charzacterize the samples by SEM, TEM, and XRD. Moreover, the compositions of trace elements and isotopes will be easily determined from large amounts of samples. Further studies using this experimental system will contribute to further understanding of the primodial solar system.
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Report
(2 results)
Research Products
(8 results)
