Comparison of the Panthalassa and the Paleo-Tethys based on radiolarian analysis

基于放射虫分析的Panthalassa和古特提斯洋的比较

• 批准号: 11640466
• 负责人: YAO Akira
• 金额: $ 2.56万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640466/
• 关键词: radiolaria; Panthalassa; Paleo-Tethys; Paleoceanic environment; Paleozoic; Mesozoic boundary; ペルム紀; 三畳紀; 古海洋

The object of this research was to compare the paleoceanic environment of the Panthalassa and the Paleo-Tethys during Permian to Triassic time based on radiolarian analysis. Materials of this research were collected from (1) bedded cherts of the Mino Terrane in Southwest Japan, (2) clastics and acidic tuff of the Yangzi Platform in South China, (3) bedded cherts of the Changnin-Menglian Terrane in Southwest China, and (4) bedded cherts of the Yunkai Terrane in South China.The Permian radiolarian fauna from the Panthalassa deposites (the Mino Terrane) indicates high diversity which is comparable with recent radiolarian fauna from the low latitudinal deep sea sediments of the Pacific Ocean. The Permian radiolarian faunas from South China (the Yangzi Platform and the Yunkai Terrane), which situated in the eastern margin of the Paleo-Tetys, are not so diverse. The founa fo the typical Paleo-Tethys (the Changnin-Menglian Terrane) is not also diverse. These features suggest that the paleoceanic environment was considerably different between the Panthalassa and the Paleo-Tethys in spite of the low latitudinal bottom sediments. However, on the basis of the radiolarian faunal change in both paleoceans, it is considered that both paleoceans suffered the global environmental change through the Permian/Triassic boundary.

本研究的目的是基于放射虫分析来比较二叠纪至三叠纪期间泛海拉萨和古特提斯的古海洋环境。本研究的材料采集自（1）日本西南部美浓地体的层状燧石，（2）华南扬子地台的碎屑和酸性凝灰岩，（3）中国西南昌宁-孟连地体的层状燧石， (4)华南云开地体的层状燧石。来自Panthalassa矿床(米诺地体)的二叠纪放射虫动物群表明其高度多样性，可与太平洋低纬度深海沉积物中的近期放射虫动物群相媲美。位于古特提斯山脉东缘的华南地区（扬子台地和云开地体）二叠纪放射虫动物群种类并不丰富。典型的古特提斯地体（长宁-孟连地体）的资源也并不多样化。这些特征表明，尽管底部沉积物纬度较低，但泛海洋和古特提斯洋之间的古海洋环境存在显着差异。然而，根据两个古海洋放射虫区系的变化，认为两个古海洋都通过二叠纪/三叠纪边界遭受了全球环境变化。

项目成果

Yao, A.and Kuwahara, K.: "Permian and Triassic radiolarians from the southern Guizhou Province, China."Jour.Geosci., Osaka City Univ.. vol.43 art.1. 1-19 (2000)

Yao, A. 和 Kuwahara, K.：“来自中国贵州省南部的二叠纪和三叠纪放射虫。”Jour.Geosci.，大阪市立大学。第 43 卷第 1 条。

Yao, A., Ezaki, Y., Hao, W.and Wang, X.: "Biotic and Geological Development of the Paleo-Tethys in China"Peking University Press. 168 (2000)

姚A.，江崎Y.，郝文，王X.：“中国古特提斯洋的生物与地质发育”，北京大学出版社。

Ezaki, Y.and Yao, A.: "Permian-Triassic successions in Japan : key to deciphering Permian/Triassic events."Yin, H., Dickins, J.M., Shi, G.R.and Tong, J.eds. : Permian-Triassic Evolution of Tethys and Western Circum-Pacific (Developments in Palaeontology a

Ezaki, Y. 和 Yao, A.：“日本二叠纪-三叠纪演替：破译二叠纪/三叠纪事件的关键。”Yin, H.、Dickins, J.M.、Shi, G.R. 和 Tong, J.eds。

八尾昭: "東アジアの中・古生代テクトニクスからみた西南日本の地帯配列"地学団体研究会専報. 49. 145-155 (2000)

Akira Yao：“从东亚中生代和古生代构造的角度看日本西南部的地带排列”地球科学学会研究组杂志49。145-155（2000）。

Ezaki,Y.: "Permian-Triassic successions in Japan : key to deciphering Permian/Triassic events"Developments in Palaeontology and Stratigrapby. 18. 127-139 (2000)

Ezaki,Y.：“日本二叠纪-三叠纪演替：破译二叠纪/三叠纪事件的关键”古生物学和地层学的发展。