Precise structural analysis of the Shimanto accretionary complex in Kyushu, southwest Japan.

日本西南部九州四万十增生杂岩的精确结构分析。

• 批准号: 22540472
• 负责人: YAMAMOTO Hiroshi
• 金额: $ 1.66万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22540472/
• 关键词: 地質構造; テクトニクス; 四万十帯; 付加体; 四万十累層群; 佐伯亜層群; 覆瓦状構造; 北薩; 薩摩半島; 徳之島; 蛇紋岩; 超マフィック岩; 薩摩半島中央部

Geological structures of the Shimanto Belt in southwestern Kyusyu and Tokunoshima Island have been investigated. In the Hokusatsu district, layers of basaltic lava, chert and mudstone form imbricate structure. The Yaseo area in the Satsuma Peninsula carries one of the serpentinite occurrences in the Shimanto Belt. Two majorserpentinite bodies are exposed in the areas extending about 100 x 50 m and 200 x 70 m.These overlie west-dipping layers of sandstone and mudstone with subhorizontal boundaries.In the Choyasan area of the Nansatsu district, layers of mudstone and sandstone generally dip west with westerly younging. Geology of the central part of Tokunoshima Island is composed of pelitic-psammitic schsits, granitic intrusive rocks and sporadic serpentinite. Lenticular bodies of serpentinite dipping northwest in low angles are distributed in the pelitic schist. Dark-shaded veins with up to 20 cm thick appearin the pelitic and psammitic schists at the mouth of Akirigami River in western Tokunoshima. Fragments of the country rocks in variable sizes and fine-grained particles fill the veins.

研究了九州西南部的四万十带和德之岛的地质构造。在北佐地区，玄武质熔岩、燧石和泥岩层形成叠瓦状结构。萨摩半岛的八谷地区是四万十带蛇纹岩的产状之一。在约100 x 50 m和200 x 70 m的区域内出露两个主要蛇纹岩体。它们覆盖在具有近水平边界的砂岩和泥岩的西倾层上。在南萨苏地区的Choyasan区域，泥岩和砂岩层通常向西倾斜，并向西倾斜。德之岛中部的地质由泥砂质片岩、花岗质侵入岩和零星的蛇纹岩组成。泥质片岩中分布有低角度北西倾的蛇纹岩透镜体。在德之岛西部的秋上川河口的泥质和砂质片岩中，出现了厚度达20 cm的暗色脉。大小不一的围岩碎片和细粒填充在矿脉中。

项目成果

Metamorphic P–T evolution of high‐pressure eclogites from garnet growth and reaction textures: Insights from the Kaghan Valley transect, northern Pakistan

石榴石生长和反应结构的高压榴辉岩的变质 P-T 演化：来自巴基斯坦北部 Kaghan 谷横断面的见解

• 发表时间: 2013
• 作者: H. Rehman;H. Yamamoto;K. Shin
• 通讯作者: K. Shin

九州南部北薩地方の四万十帯池之段層の地質構造

九州南部北佐地区四万十带池之团组地质构造

• 发表时间: 2012
• 作者: Tokunaga T.;Daisuke Ikeda;Kazuyuki Nakamura;Tomoyuki Higuchi;Akimasa Yoshikawa;Teiji Uozumi;Akiko Fujimoto;Akira Morioka;Kiyohumi Yumoto;CPMN group;土居真輔・冨永隆志・山本啓司
• 通讯作者: 土居真輔・冨永隆志・山本啓司

Ion microprobe U–Th–Pb geochronology and study of micro-inclusions in zircon from the Himalayan high-and ultrahigh-pressure eclogites, Kaghan Valley of Pakistan

• DOI: 10.1016/j.jseaes.2012.04.025
• 发表时间: 2013-02
• 期刊: Journal of Asian Earth Sciences
• 影响因子: 3
• 作者: H. Rehman;Katsura Kobayash;T. Tsujimori;T. Ota;H. Yamamoto;E. Nakamura;Y. Kaneko;T. Khan;M. Terabayashi;Kenta Yoshida;T. Hirajima

九州南部南薩地方の四万十帯の地質構造

九州南部南萨地区四万十带的地质构造

• 发表时间: 2012
• 作者: Tokunaga T.;D.Ikeda;K.Nakamura;T.Higuchi;A.Yoshikawa;T.Uozumi;A.Fujimotok;A.Morioka;K.Yumoto;上田脩郎・山本啓司
• 通讯作者: 上田脩郎・山本啓司

Tectonic stacking of back-arc formations in the Thelichi section (Indus valley) of the Kohistan arc, northern Pakistan

巴基斯坦北部科希斯坦岛弧泰利奇剖面（印度河谷）弧后地层的构造堆积

• 发表时间: 2011
• 期刊: Journal of Asian Earth Sciences
• 影响因子: 3
• 作者: Hiroshi Yamamoto;以下3名
• 通讯作者: 以下3名