Geological and Petrological Study of the Cenozoic Volcanic Rocks in the Southwest Japan

日本西南部新生代火山岩的地质和岩石学研究

• 批准号: 62460051
• 负责人: MATSUMOTO Yukio
• 金额: $ 3.2万
• 依托单位: Yamaguchi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460051/
• 关键词: Southwest Japan; Cenozoic Volcanic Rock; 地質岩岩石学; 地質学岩石学; 新生代火岩

Results of the recent study in 1987-1988 arrived at the following conclusions.1) The volcanostratigraphy of Kyushu, Ryukyu Islands, Setouchi and sanin regions, Oki and Ogasawara Islands are well defined.2) The cenozoic geology in southwest Japan was so complicated by the volcanic series, such as, the Green Tuff and Setouchi series in the Miocene, Tairiku series from the late Miocene to Holocene, Hohi and Hisatsu series from the Pliocene to early Pleisto-cene, Buzen series in the middle Pleistocene, Sanin and Ryukyu series from the late Pleistocene to Holocene.3) The alkali rocks are recognized in a part of the Tairiku and Hohi volcanic series. The tholeiitic rocks are observed in a part of the Green Tuff, Tairiku, Hohi, Hisatsu and Ryukyu series. Other volcanic rocks are belonged the calc-alkali rock series.4) The high magnesian andesites are occured in the Setouchi series of calc-alkali rock series, and the tholeiitic rock from Iriomote-jima, Ryukyu islands of the Green Tuff series. the latter are explained by the crystallization of high temparature.5) The petrogenesis of each volcanic rocks are explained by some condition, such as, the difference of mantle rocks, P-T condition and degree of melting, P-T condition of crystallization in magma, immiscibility in magam, magma mixing, assimilation and contamination.

1987-1988年的研究结果表明：1）九州、琉球群岛、濑户内、沙宁地区、隐岐、小笠原群岛的火山地层较明确; 2）日本西南部新生代地质复杂，有中新世的绿色凝灰岩、濑户内系列，中新世晚期至全新世的大陆系列，上新世至早更新世的Hohi和Hisatsu系列，中更新世的Buzen系列，晚更新世至全新世的Sanin和Ryukyu系列。拉斑玄武岩产于绿色凝灰岩、大陆岩、丰日岩、寿津岩和琉球岩系的一部分。（4）高镁安山岩产于钙碱性岩系的濑户内岩系，拉斑玄武岩产于绿色凝灰岩系的琉球群岛西表岛。5）各火山岩的成因可从地幔岩石的差异、P-T条件和熔融程度、岩浆结晶的P-T条件、岩浆的不相容性、岩浆混合、同化和混染等条件来解释。

项目成果

白木敬一: MAGMA. 81. 7-11 (1987)

白木敬一：MAGMA。81. 7-11 (1987)

松本〓夫: 九州の後期新生代火山活動をめぐる諸問題(地団研専報). 33. 1-20 (1987)

Matsumoto, T.：有关九州晚新生代火山活动的问题（Jidanken Journal）33. 1-20 (1987)。

松本〓夫: "火山の一生(地球の歴史をさぐる2)" 青木書店, 190 (1987)

松本：《火山的一生（探索地球的历史2）》青木书店，190（1987）

永尾隆志: 岩石鉱物鉱床学会誌. 83. 191-202 (1988)

Takashi Nagao：日本岩石和矿物沉积学会杂志 83. 191-202 (1988)。

SHIRAKI, Keiichi: "The pyroxene crystallization trend of a magnesian andesite from Iriomote-jima, Ryukyu Islands: a boninite analogue" Jour. Geol. Soc. Japan. 94. 387-390 (1988)

SHIRAKI, Keiichi：“琉球群岛西表岛镁质安山岩的辉石结晶趋势：栲泥石类似物”Jour。