Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1993-09-01 |
タイトル |
|
|
タイトル |
EXPERIMENTAL STUDIES ON SYENITIC ROCKS IN THE YAMATO MOUNTAINS, EAST ANTARCTICA |
言語 |
|
|
言語 |
eng |
資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
ID登録 |
|
|
ID登録 |
10.15094/00002720 |
|
ID登録タイプ |
JaLC |
ページ属性 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
P(論文) |
論文名よみ |
|
|
その他のタイトル |
EXPERIMENTAL STUDIES ON SYENITIC ROCKS IN THE YAMATO MOUNTAINS, EAST ANTARCTICA |
著者名よみ |
オオバ, タカノブ
シライシ, カズユキ
|
著者名(英) |
OBA, Takanobu
SHIRAISHI, Kazuyuki
|
著者所属(英) |
|
|
|
en |
|
|
Department of Geoscience, Joetsu University of Education |
著者所属(英) |
|
|
|
en |
|
|
National Institute of Polar Research |
抄録(英) |
|
|
内容記述タイプ |
Other |
|
内容記述 |
The stability of amphibole was studied in the presence of syenite composition liquid. The melting relationships of three hornblende clinopyroxene quartz syenites and a hornblende two-pyroxene syenite from the Yamato Mountains were determined in the temperature range of 650-900℃, under a water pressure of 0.05-0.3GPa and oxygen fugacities of the FMQ buffer. Experimental results of hornblende clinopyroxene quartz syenites (Y406 and Y904) and one hornblende two-pyroxene syenite (Y557) at 0.1 GPa show that melting begins between 720℃ and 770℃, and amphiboles disappear between 810℃ and 895℃. With the increasing temperature at 0.1GPa, quartz disappears first, then plagioclase and amphibole in that order. The water saturated solidus temperature of a normative quartz-free hornblende clinopyroxene mela-syenite (Y405) is about 780℃ at 0.1GPa. K-feldspar in this sample disappears at lower temperature than amphibole. In two syenites (Y557 and Y904), solidus and the stability limit line of amphibole intersect at a lower pressure than 0.3GPa. Moreover, all rocks investigated are at least 40% melted at temperatures ∿50℃ above the solidus. The present results suggest that amphibole in these syenites could crystallize at pressures lower than 0.3GPa (∿10km in depth), indicating their emplacements at a relatively shallow crustal level. |
雑誌書誌ID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA1072335X |
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences
巻 6,
p. 72-82,
発行日 1993-09
|
出版者 |
|
|
出版者 |
National Institute of Polar Research |