ダウンロード数: 327
このアイテムのファイル:
| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| ASM_S_2_147.pdf | 1.09 MB | Adobe PDF | 見る/開く |
| タイトル: | Volcanic Rocks in the Samburu Hills, Northern Kenya |
| 著者: | KOYAGUCHI, Takehiro |
| 発行日: | Mar-1984 |
| 出版者: | The Research Committee for African Area Studies, Kyoto University |
| 誌名: | African Study Monographs. Supplementary Issue. |
| 巻: | 2 |
| 開始ページ: | 147 |
| 終了ページ: | 179 |
| 抄録: | Volcanic rocks of the Samburu Hills are composed mainly of basaltic lava flows (ankaramite, olivine basalt and hawaiite) intercalated with differentiated rock lava flows and welded tufffs (trachyte and alkali rhyolite). Basaltic rocks of various ages, from Miocene to Recent, were collected from an area of 10 x 10 km2 (Suguta Area) and their petrography and petrochemistry are described. A decrease in degree of silica-undersaturation with time from alkali basalts to transitional basalts can be recognized. Successive decrease in depth of segregation of primary magmas can explain the temporal variation in chemical composition. |
| DOI: | 10.14989/68310 |
| URI: | http://hdl.handle.net/2433/68310 |
| 出現コレクション: | 2 (Study of the Tertiary Hominoids and Their Palaeoenvironments in East Africa: 2) |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。