Palaeontologic and isotopic study on the environmental changes during the Late Mesozoic

晚中生代环境变化的古生物学和同位素研究

• 批准号: 09839036
• 负责人: HIRANO Hiromichi
• 金额: $ 1.79万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09839036/
• 关键词: Cretaceous; species diversity; Oceanic Anoxic Event; environmental change; stable isotope; 空知層群; 蝦夷累層群; 天塩中川; 大夕張; 下部蝦夷層群; 安定炭素同位体比; 慶尚累層群

1. Ammonoid and inoceramid biostratigraphy for the Lower and the Middle Yezo Group in the North Oyubari area was revised, and the stable carbon isotope stratigraphy was nearly estblished. It is highly possible to reconstruct four subevents of OAE 1 for this area.2. Ammonoid, inoceramid and radiolarian biostratigraphy for the Lower and the Middle Yezo Group in Nakagawa area was nearly established, and the biostratigraphic control was much improved by this work.3. The stable carbon isotope stratigraphy was nearly established for the succession, together with the change of biogeochemical features. Thus, it became clear that OAE 1 arose in this area.4. Database of Cretaceous ammonoids in Japan at the level of species was completed in the time resolution of subage.5. It was elucidated that the diversity change of the Japanese Cretaceous ammonoids was strongly controlled by the arise of OAEs.6. It became clear that ammonoid diversity gradually decreased during the Late Cretaceous from about 700 species to 690 species, and the influence the K/T impact is extremely small.

1.对北奥夕张地区下、中耶佐群的菊石和菊石生物地层进行了订正，并基本建立了稳定碳同位素地层。在该区重建OAE 1的四个子事件是很有可能的.基本建立了中川地区冶佐群中下段菊石、介虫和放射虫的生物地层学，提高了生物地层学的控制性.该层序基本建立了稳定的碳同位素地层学，并伴随着地球化学特征的变化。因此，很明显，OAE 1出现在这一地区。在亚时代的时间分辨率上完成了日本白垩纪菊石种级数据库的建立.阐明了日本白垩纪菊石的多样性变化强烈地受控于OAEs的出现。很明显，菊石多样性在晚白垩世逐渐减少，从约700种到690种，K/T的影响是非常小的。

项目成果

平野弘道: "下部蝦夷層群中のいわゆるオリストリス石灰岩体-特に芦別川水系三又沢に見られる岩体の特徴"早稲田大学教育学部学術研究. 46. 1-6 (1998)

Hiromichi Hirano：“下虾夷群中所谓的橄榄石石灰岩体 - 特别是在芦别河流域 Mimatasawa 中看到的岩石体的特征”，早稻田大学教育学院学术研究 46. 1-6 (1998)。

TOSHIMITSU,S.: "Database of the Cretaceous ammonoids in Japan - stratigraphic distribution and bibliography"Bull.Geol.Survey, Japan. 51. 559-613 (2000)

TOSHIMITSU,S.：“日本白垩纪菊石数据库 - 地层分布和参考书目”Bull.Geol.Survey，日本。

MITSUGI,T.: "Radiolarian biostratigraphy of the Lower Yezo Group, central Hokkaido, with special reference to the Early Cretaceous Oceanic Anoxic Event."News of Osaka Micropaleontologists. Special Volume, no.10. 237-244 (1997)

MITSUGI,T.：“北海道中部下虾夷群的放射生物地层学，特别是白垩纪早期海洋缺氧事件。”大阪微古生物学家新闻。

HIRANO,H.: "Changes in Cretaceous ammonoid diversity and marine environments of the Japanese Islands. In Okada, H.nd Mateer, N.J.(eds.) Cretaceous Environments of Asia."Developments in Palaeontology and Stratigraphy, 17, Elsevier, Amsterdam. 145-154 (2000

HIRANO,H.：“白垩纪菊石多样性和日本群岛海洋环境的变化。冈田，H.nd Mateer，N.J.（编辑）亚洲白垩纪环境。”古生物学和地层学的发展，17，爱思唯尔，阿姆斯特丹。

HIRANO,HIROMICHI: "K-Ar age study on the Cenomanian/Turonian boundary of the Yezo Supergroup, Hokkaido, Japan." Memoir of the Geological Society of Japan. no.48. 132-141 (1997)

HIRANO,HIROMICHI：“日本北海道虾夷超群塞诺曼阶/土伦阶边界的 K-Ar 年龄研究。”