Evolutionary paleontologic, stratigraphic, and geochemical studies on the Cretaceous environmental changes.

白垩纪环境变化的演化古生物学、地层学和地球化学研究。

• 批准号: 15340178
• 负责人: HIRANO Hiromichi
• 金额: $ 5.44万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340178/
• 关键词: Biostratigraphy; Carbon isotope stratigraphy; Sequence stratigraphy; International Correlation; Environmental changes; 白亜紀; 海洋無酸素事変; 微化石層序; 堆積相解析

(1)We studied the stratigraphic transition of major and minor elements in terms of some statistical methods from the Sorachi to the Yezo Group as well as of radiolarian abundance and specific compositions. in Teshionakagawa area, Hokkaido. We clarified that the chemical transition is much different from the clear visual change in the succession between the upper Sorachi and the lower Yezo Groups.(2)We made a joint work on the same sections of the upper Cretaceous in Nakatonbetsu area, Hokkaido from the viewpoints of biostratigraphy by using ammonoids, inoceramids, planktonic foraminifers, sequence stratigraphy, and stable carbon isotope stratigraphy. We detected a significant spike of carbon isotope fluctuation at the same stratigraphic horizon of the extinction of inoceramid bivalves. This result enable us to make a high resolution international correlation.(3)We made a joint research on the Jixi Group in NE China of the provenance of the Yezo forearcc basin from the viewpoints of biostratigraphy of marine bivalves, pollen, stable carbon isotope stratigraphy and sequence stratigraphy. We obtained a high resolution correlation of the group with the Japanese Pacific, and European sections.

(1)We用统计学方法研究了索拉奇群至耶佐群的主量元素和次量元素的地层过渡，以及放射虫丰度和特征成分。位于北海道手盐中川地区。我们澄清，化学过渡是很大的不同，从清晰的视觉变化之间的继承上Sorachi和较低的Yezo集团。(2)We从生物地层学的角度，利用菊石、菊石、浮游有孔虫、层序地层学和稳定碳同位素地层学，对北海道中屯别地区上白垩统同一剖面进行了联合研究。我们检测到一个显着的尖峰碳同位素波动在同一地层的灭绝inoceramid双壳类。这一结果使我们能够进行高分辨率的国际相关。(3)We从海相双壳类生物地层学、孢粉学、稳定碳同位素地层学和层序地层学等方面，对叶佐前弧盆地物源的中国东北鸡西群进行了联合研究。我们得到了一个高分辨率的相关组与日本太平洋，欧洲部分。

项目成果

Unconformity between the Upper Maastrichtian and Upper Paleocene in the Hakobuchi Formation, north Hokkaido, Japan : a major time gap within the Yezo forearc basin sediments.

日本北海道北部箱渊组上马斯特里赫特阶和上古新世之间的不整合面：虾夷弧前盆地沉积物中的一个主要时间间隙。

• 发表时间: 2005
• 期刊: Cretaceous Research 26
• 作者: Ando;Hisao;Tomosugi;Takashige
• 通讯作者: Takashige

Geology and stratigraphy of forearc basin sediments in Hokkaido, Japan : Gretaceous environmental events on the north-west Pacific margin.

日本北海道弧前盆地沉积物的地质学和地层学：西北太平洋边缘的白垩纪环境事件。

• 发表时间: 2004
• 期刊: Cretaceous Research 25
• 作者: Takashima;R.;Kawabe;F.;Nishi;H.;Moriya;K.;Wani;R.;Ando;H.
• 通讯作者: H.

Early Cenozoic extreme climates : The Walvis Ridge Transect.

早新生代极端气候：沃尔维斯海岭断面。

• 发表时间: 2004
• 期刊: Proceedings of the Ocean Drilling Program, Leg 208 Initial report (2004).
• 作者: Hasegawa;Takashi;24 shipboar members
• 通讯作者: 24 shipboar members

First occurrence of Haugia cf. variabilis (d'Orbigny)(Ammonoidea) from the Lower Jurassic of the Uminoura area, western Kyushu, Japan.

Haugia 第一次出现 cf.

• 发表时间: 2004
• 期刊: Paleontological Research 8(2)
• 作者: Wani;R.;Ohta;T.;Hirano;H.
• 通讯作者: H.

Cretaceous terrestrial paleoenvironments of northeastern Asia suggested from carbon isotope stratigraphy : Increased atmospheric pCO2-induced climate.

碳同位素地层学表明东北亚白垩纪陆地古环境：大气 pCO2 引起的气候增加。

• 发表时间: 2003
• 期刊: Journal of Asia Earth Sciences. 21
• 作者: Hasegawa;Takashi
• 通讯作者: Takashi