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A Comparative Study on the Permian Invertebrate Marine Fossils between the Arctic and the Tethys

北极与特提斯二叠纪海洋无脊椎动物化石的比较研究

基本信息

批准号：
63540618
负责人：
NAKAMURA Koji
金额：
$ 1.22万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

Based on the occurrence data of the Permian marine invertebrate fossils both in the Arctic (mainly from Spitsbergen) and in the Tethys (from Japan, China, Southeast Asia, India, Pakistan, Iran, Turkey, Greece, Yugoslavia, Italy), it becomes evident that through the Permian Period there is a distinct difference between the marine invertebrate faunas in the Arctic Sea area and those in the Tethyan Sea area. In the Arctic region, the region of Franklinian Sea and adjacent shelves, the known Permian invertebrate faunas from Novaya Zemlya to Spitsbergen, Greenland and Canadian Arctic Islands have affinities with faunas of the Russian Platform, Uralian Sea and Eastern Siberia. They also indicate strong relations to those of the Zechstein Sea area of northern Europe. Invertebrate fossil assemblages of the Arctic are comparatively uniform within the province, while the assemblages of the Tethys are fairly different. Comparison of invertebrate fossil assemblages indicate that the Tethys Province can be fundamentally divided into three provinces, i. e. The Angara-Tethyan, the Middle-Tethyan and Gondwana-Tethyan Subprovinces from north to south in the Permian time. Among them the faunas from the Angara-Tethyan Subprovince usually include a lot of Arctic-type ones, while those of the Middle-Tethyan do contain none of the Arctic-type ones except for some bivalves. Faunas of the Gondwana-Tethyan Subprovince are considered to have some relationship with the Arctic ones in generic level, nevertheless do not contain any common species. This fact means that the climate in the Gondwana-Tethyan Subprovince and the Arctic Province was cooler compared with that in the Middle-Tethyan Subprovince. Through the Permian time faunal provincialism between the Arctic and the Tethys became more evident in the Late Permian compared with that in the Early Permian.

根据北极（主要产自斯匹次卑尔根群岛）和特提斯海（产自日本、中国、东南亚、印度、巴基斯坦、伊朗、土耳其、希腊、南斯拉夫、意大利）二叠纪海洋无脊椎动物化石的产出资料，可以看出，整个二叠纪，北极海域的海洋无脊椎动物群与特提斯海域的海洋无脊椎动物群有着明显的差异。在北极地区，富兰克林海和邻近大陆架地区，从新地岛到斯匹次卑尔根岛，格陵兰岛和加拿大北极群岛已知的二叠纪无脊椎动物群与俄罗斯地台，乌拉尔海和东西伯利亚的动物群有亲缘关系。它们还表明与北方欧洲的Zechstein海地区有着密切的关系。无脊椎动物化石组合的北极是比较统一的省内，而特提斯的组合是相当不同的。无脊椎动物化石组合的比较表明，特提斯省基本上可分为三个省，即：e.二叠纪自北向南划分为安加拉-特提斯亚省、中特提斯亚省和冈瓦纳-特提斯亚省。其中，安加拉-特提斯亚省的动物群中通常含有大量的北极型动物，而中特提斯亚省的动物群中除了一些双壳类动物外，没有北极型动物。冈瓦纳-特提斯亚省的动物群在属的水平上与北极动物群有一定的联系，但没有共同种。这意味着冈瓦纳-特提斯亚省和北极省的气候比中特提斯亚省要冷。在整个二叠纪，与早二叠世相比，晚二叠世北极与特提斯之间的动物区系分异更加明显。