Study on migration, disappearance and evolution of Ostatcoda with relation to the opening and clostire of the Tsushima and Korean Straits during the late Cenozoic

新生代晚期介形虫的迁徙、消失和演化与对马海峡和朝鲜海峡开闭的关系研究

基本信息

  • 批准号:
    17540442
  • 负责人:
  • 金额:
    $ 2.37万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2007
  • 项目状态:
    已结题

项目摘要

The aim of this study is to clarify the relationships between the opening and closure of the Thushima and Korean Straits and migration, disappearance and evolution of Ostracoda during the late Cenozoic. Surface sediment samples for the analysis of recent Ostracoda were collected from enclosed bays along the Tsushima Island. (Shush, Aso and Miura Bays) and Omura Bay. Concerning fossil. Ostracoda, I collected samples from the upper Pliocene Kuwae Formation, Niigata Prefecture, the Miyazaki Group, Miocene deposits in the Chugoku Mountains and so on. Based on these results and taking account of earlier studies, I led to the four conclusions as follows;The Korean Strait has been a geographic bather far embayment ostracodes alter the middle Pleistocene. Namely dominant species in Japanese enclosed bays are different from those in Korean and Chinese enclosed baysWarm water ostracode species living in marine areas shallower than 50 m in water depth were recognized in the interglacial deposits of the middle Pliocene Kuwae Formation. Especially, warm water inflows occurred certainly at about 2.9 Ma. However, there are only a few ostracode species which lived dominantly in shallow seas under the influence of the Kuroshio Current at that time. Thus warm water currents having flowed into the Japan Sea were weaker and thinner than today.Temperate intermediate waters warmer than today (more than 6 ℃) were developed in each interglacial period of the Middle Pliocene. However, inflow routes of the waters were not clarified in this study.Tropical to subtropical ostracode species were flourished through the northern to southern Japan during the Miocene climatic optimum (ca. 16 Ma) because the southern strait opened widely and strong warm water currents flowed into the Japan Sea. These ostracode assemblages were somewhat different from those in the late Early Miocene (ca. 17-18 Ma).
本研究的目的在于阐明竹岛海峡和朝鲜海峡的开合与晚新生代介形虫的迁移、消失和演化之间的关系。用于分析最近介形类的表层沉积物样本采集于对马岛沿岸的封闭海湾。(Shush, Aso和三浦湾)和大村湾。有关化石。介形虫,我收集了新泻县上新世Kuwae组、宫崎组、中新世Chugoku山等矿床的样品。基于这些结果,并考虑到早期的研究,我得出了以下四个结论:自更新世中期以来,朝鲜海峡一直是甲壳类生物的地理浴场。日本封闭湾的优势种与朝鲜和中国封闭湾的优势种不同。在中上新世Kuwae组间冰期沉积中发现了生活在水深小于50 m海域的水介形虫种。特别是在2.9 Ma左右,肯定发生了暖水流入。然而,在当时黑潮的影响下,只有少数介形虫种主要生活在浅海。因此,流入日本海的暖流比今天更弱、更薄。中上新世各间冰期均发育比今天温度高(6℃以上)的温带中间水域。然而,本研究并未明确水的流入路径。在中新世气候最适宜时期(约16 Ma),由于南部海峡开阔,暖流强流入日本海,日本北部至南部的热带至亚热带介形类繁盛。这些介形虫组合与早中新世晚期(约17-18 Ma)的介形虫组合有所不同。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
島根県益田市本俣賀町周辺の地質
岛根县增田市本又町周边地质
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    入月俊明;石田 桂;武志賢一
  • 通讯作者:
    武志賢一
Ostracode and planktonic foraminiferal biohorizons in the Middle Miocene Hatatate Formation, Northeast Japan, with implication of global climatic changes
日本东北部中中新世旗状组介形类和浮游有孔虫生物地平线及其对全球气候变化的影响
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yuki;Fujiwara;Toshiaki Irizuki
  • 通讯作者:
    Toshiaki Irizuki
Vertical change of paleoenvironments in Lake Nakaumi south of Daikonshima Island, Shimane Prefecture, Southwest Japan, based on the analysis of ostracode assemblages
基于介形类组合分析的日本西南部岛根县大根岛以南中海湖古环境的垂直变化
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Ryohei;Kawakami
  • 通讯作者:
    Kawakami
Temporal changes of ostracode assemblages from Omura Bay, Nagasaki Prefecture, Southwest Japan, during the 20th Century
20 世纪日本西南部长崎县大村湾介形类群的时间变化
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Shigenori;Kawano
  • 通讯作者:
    Kawano
Taphonomy of ostracode assemblages in Holocene tsunami deposits in southern Kanto region, central Japan
日本中部关东地区南部全新世海啸沉积物中介形虫组合的埋藏学
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yumi;Sasaki
  • 通讯作者:
    Sasaki
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IRIZUKI Toshiaki其他文献

IRIZUKI Toshiaki的其他文献

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{{ truncateString('IRIZUKI Toshiaki', 18)}}的其他基金

The relationship between global warming/cooling and shallow marine environments in the Sea of Japan during the Pliocene
上新世全球变暖/变冷与日本海浅层海洋环境的关系
  • 批准号:
    22540476
  • 财政年份:
    2010
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Paleobiological study of Ostracoda (Crustacea) in relation to paleogeographical changes of Kyushu to the Ryukyu Islands
介形类(甲壳类)古生物学研究与九州至琉球群岛古地理变化的关系
  • 批准号:
    15540451
  • 财政年份:
    2003
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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