WEKO3
アイテム
A preliminary report on the geochemistry of amphibolites from the Chuncheon area in the Gyeonggi massif, Korea
https://doi.org/10.18999/joueps.56.13
https://doi.org/10.18999/joueps.56.13d055cfac-b373-488d-9066-480833f55570
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
56-2.pdf (2.3 MB)
|
|
| アイテムタイプ | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2011-05-06 | |||||
| タイトル | ||||||
| タイトル | A preliminary report on the geochemistry of amphibolites from the Chuncheon area in the Gyeonggi massif, Korea | |||||
| 言語 | en | |||||
| 著者 |
SUZUKI, Kazuhiro
× SUZUKI, Kazuhiro× DUNKLEY, Daniel J.× KAJIZUKA, Izumi× CHWAE, Ueechan |
|||||
| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Amphibolites in the Gubongsan Group at Chuncheon, South Korea have garnetbearing and garnet-free assemblages: garnet+tschermakitic hornblende+quartz+plagioclase+ biotite (garnet amphibolite), relict garnet+edenitic hornblende+plagioclase+ quartz+biotite (relict garnet-bearing amphibolite), edenitic hornblende+plagioclase+ quartz+biotite and tschermakitic to edenitic hornblende+plagioclase+chlorite+quartz +biotite. The garnet relics are extensively embayed and surrounded by coronas of plagioclase+edenitic hornblende. Whole-rock compositions of amphibolite samples are equivalent to basaltic protoliths with MORE-like characteristics. Garnet-free, chlorite-bearing amphibolite is the most magnesian, with an Fe2+/(Fe2++Mg) value of 0.26. Graphical representations of whole-rock and mineral compositions show that individual mineral assemblages approach chemical equilibrium and define distinct compositional volumes in the A (Al203+Fe203-Na20-K20) - C (CaO) - F (FeO) - M (MgO) tetrahedron. The A component is critical in determining the stability of the garnet-bearing assemblage, which occurs above a threshold that decreases at higher Fe/(Fe+Mg) values. As a result, small variations in bulk composition can produce differing mineral assemblages. Whole-rock Sr concentrations are significantly depleted in garnet amphibolite, whereas values in relict garnet-bearing and garnet-free amphibolite match typical basaltic compositions. The depletion may be attributable to leaching via fluids released by dehydration reactions and the prograde breakdown of Sr hosts, such as plagioclase and epidote. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Dept. of Earth and Planetary Sciences, Nagoya University | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/joueps.56.13 | |||||
| ID登録タイプ | JaLC | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0919-875X | |||||
| 書誌情報 |
en : The Journal of Earth and Planetary Sciences, Nagoya University 巻 56, p. 13-29, 発行日 2009 |
|||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/14731 | |||||
| 識別子タイプ | HDL | |||||
