Detection of the widespread tephra beds since Miocene in Japanese Islands and the investigation of the modes of their distribution and deposition

日本列岛中新世以来广泛分布的火山灰层的发现及其分布和沉积模式的调查

• 批准号: 16540412
• 负责人: KUROKAWA Katsuki
• 金额: $ 2.3万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540412/
• 关键词: tephra; widearea comelation; Japanese Islands; subaqueous gravity flow; turbidite; plug flow; SKIIO; SKOSO; 新潟地域; 運搬機構; Plug flow; 掛川層群; 白河火砕流; 千年テフラ層; 大隅石; 関屋テフラ層; SK110テフラ層; 2層流; bipartite; テフラ層; 新潟; 重量流; 魚沼層群; 乱流

1. Detection of the wideaspread tephra beds since Miocene in Japanese Islands was achieved through the Japan Sea side, the Pacific Ocean Side and cenrtal moun taineous regions, such as Niigata region, Akita region, Boso Peninsula, Kakegawa region, Nagano region and so on. In results, more than 10 widearea tephras were correlated among these regions. Especially, the Znp-Ohta Tephra Bed(4.0Ma) and the Omine-SK110 Tephra Bed(1.6Ma) were detected widely, making useful datum plan es in geological and geoecological reconstruction.2, As for the investigation of the modes of dispersion and sedimentation were achieved especially on the recognition of subaqueous sediment gravity flow depos its and their mechanism of transportation and sedimentation. In results, several types of gravity flows were clarified: the Joetsu Ash and the SK050 Tephra show typical turbidite character, while the SK110 Tephra was supposed to flow down as nearly plug flow condition. In addition, the Omine-SK110 Tephra was possibly suspcted that it erupted on-land in the western Nagano region, and entered in suba queous environment in the Niigata region, and further flowed down to the Akita region along the submarine trough 450km far from the on-land volcanic source The results of these investigations was reported at the 17th International Sedi mentological Congress on August, 2006.

1。从日本海洋中期，太平洋海面，太平洋侧和Cenrtal moun taineous地区（例如Niigata地区，Akita地区，Boso Peninsula，Kakegawa地区，Kakegawa地区，Nagano地区等）实现了宽大的tephra床。在结果中，这些区域之间有10多个adreea tephras相关。特别是，广泛检测到Znp-Ohta Tephra床（4.0mA）和Omine-SK110 tephra床（1.6mA），从而使在地质和地理生态学重建中有用的基准计划ES。对于分散和沉积模式的调查，尤其是在延迟延迟的情况下进行了延伸和沉积的调查。在结果中，阐明了几种类型的重力流：Joetsu Ash和SK050 Tephra显示出典型的浊度特征，而SK110 Tephra应该作为接近塞子流量的流动。此外，可能怀疑它在西部长野地区爆发了陆地，并进入了尼加塔地区的suba quious环境，并进一步流到了沿着潜艇的akita地区，距离这些调查的结果是在国际八月的国际统治下，据报道，据报道，在17级竞争中，据报道，在17月份进行了调查。

项目成果

Tephrostratigraphy correlation of some Pliocene Tephra Beds (4-2Ma) in the Niigata region, especially on the distribution of the Tsp Tephra Bed, and widearea correlation to the YT Tephra Beds in the Himi Group and to the Boso Peninsula, central Japan.

新泻地区部分上新世火山灰层（4-2Ma）的地层对比，特别是 Tsp 火山灰层的分布，以及与冰见群 YT 火山灰层和日本中部房总半岛的广域对比。

• 发表时间: 2004
• 期刊: MemFac.Frluc.＆ Human.Sci.(Nat.Sci.) 7-1
• 作者: Kurokawa;K.;Higuchi;Y.
• 通讯作者: Y.

Correlation of the Km2 Tephra Bed in the Kitaura Formation in the Oga Peninsula, Akita region to the SK100 Tephra Bed in the Niigata region, northeast Japan.

秋田地区男鹿半岛 Kitaura 组 Km2 火山灰岩层与日本东北部新泻地区 SK100 火山灰岩层的对比。

• 发表时间: 2004
• 期刊: Chikyuu Kagaku 58-5
• 作者: Kurokawa;K.et al.
• 通讯作者: K.et al.

水中重力流堆績物としそのSK110テフラ層

水下重力流沉积物Toshiso SK110火山灰层

• 发表时间: 2006
• 期刊: 地球科学 60・4
• 作者: Kurokawa;J. et al.;Shipboard Scientific Party;堀内克明 ほか219名;丹 真紀子
• 通讯作者: 丹 真紀子

新瀉県東頸城丘陵の千年テフラ層かろ大隅石の発見とをの対比

与新体县东久引丘陵发现的 1000 年火山灰层 Karo Osumistone 的比较。

• 发表时间: 2005
• 期刊: 新瀉大学教育人間科学部紀要(自然科学編) 8・1
• 作者: Kurokawa;k.;黒川 勝己
• 通讯作者: 黒川 勝己

新潟地域の月岡ゴマシオテフラ層・房総半島のKC118テフラ層と会津地域の芦野火砕流堆積物との対比

新泻地区月冈乡町火山灰层、房总半岛KC118火山灰层、会津地区芦野火山碎屑流沉积物的比较

• 发表时间: 2005
• 期刊: 地質学雑誌 111・9
• 作者: Yamamoto;H.;坂井 一
• 通讯作者: 坂井 一