@article{oai:shizuoka.repo.nii.ac.jp:00000383,
 author = {Shiraki, Keiichi and Saito, Toshikazu and Kuroda, Naoshi and Urano, Hayaomi and Sugiura, Tsutomu and Cole, J. W.},
 journal = {Geoscience reports of Shizuoka University},
 month = {Mar},
 note = {application/pdf, ホワイト島火山から1977年の噴火で放出された火山岩塊は, 化学組成では, 瀬戸内火山岩のカンラン石, 単斜輝石, 斜方輝石の順に, Mg#が連続的に減少する単斜輝石高マグネシア安山岩に似る.しかし鉱物化学組成はまったく異なり, ホワイト島高マグネシア安山岩は, 著しくMgに富み(Fo_<92-88>), 正規累帯をなすカンラン石と, 対照的にMgに比較的乏しく(Mg#=84-73), 逆累帯を示す単斜および斜方輝石をもつ.特に, 単斜輝石の核部はMg#が79-75とカンラン石に比べ低く, カンラン石を晶出させたと同一のマグマに由来するとは考え難い.ホワイト島高マグネシア安山岩は高マグネシア玄武岩質マグマとデイサイト質マグマの混合によって生じた。, Andesite blocks erupted from White Island volcano in 1977 are chemically similar to the clinopyroxene-rich magnesian andesites from the Setouchi volcanic belt in southwest Japan. However, there are differences in mineralogy with Mg# decreasing from olivine to clinopyroxene and orthopyroxene with a marked compositional gap. The White Island magnesian andesite contains olivine phenocrysts normally zoned from Fo92 to Fo88,suggesting that they have crystallized from a high magnesian magma. In contrast, the clino- and orthopyroxenes are rather low in Mg# , with a highest value of 83.9,and many are reversely zoned. The clinopyroxene cores with Mg# ranging from 79 to 75 indicate their derivation from a magma significantly higher in FeO/MgO than the host rock. The White Island magnesian andesites are considered to have formed by mixing of a high-Mg basalt magma and a dacite magma with relatively high FeO/MgO.},
 pages = {33--40},
 title = {Magnesian andesites from White Island, New Zealand : Mineralogical evidence for mixing of high-magnesian basalt and dacite magmas : Mineralogical evidence for mixing of high-magnesian basalt and dacite magmas(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA)},
 volume = {20},
 year = {1994}
}