| Project/Area Number |
09640562
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Petrology/Mineralogy/Science of ore deposit
|
|---|
| Research Institution | IBARAKI UNIVERSITY |
|---|
Principal Investigator |
KIMURA Makoto IBARAKI Univ.Fuc.of Science Associate Professor, 理学部, 助教授 (20142226)
|
|---|
| Project Period (FY) |
1997 – 1998
|
| Project Status |
Completed (Fiscal Year 1998)
|
| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥3,300,000 (Direct Cost: ¥3,300,000)
|
|---|
| Keywords | Meteorite / Chondrite / Solar System / Mineral |
|---|
| Research Abstract |
I studied carbonaceous chondrites to explore the thermal history of the primitive solar nebula. Especially, several samples of CV group chondrites were investigated, especially some constituent materials in them.
Through this study, the following points have been clarified :
1. Some new kinds of refractory inclusions were discovered from the Ningqiang chondrites. Some inclusions are intermediate type between refractory inclusions and cliondrules. This study shows that a kind of inclusion is the precursor material of type C inclusion, which formed by high-temperature reactions from type A.
2. Anomalously Ti-enriched mineral was encountered from some inclusions. This study shows that such phase is one of the refractory minerals that condensed in the earliest solar nebula.
3. I investigated abundant chondrules in CV3 chondrites, Allende, Kaba and Mokoia. Most of these chondrules were subjected to the anhydrous alteration to produce some alkali-bearing phases through the reaction between the solar nebular gas and chondrule. In addition, this study shows that such alteration predated the hydrous alteration to produce phyllosilicates. The results obtained in this study have been published in some international journals and others.
|
