泛海相中二叠世毛藻纲属地

IF 0.2 Q4 GEOGRAPHY, PHYSICAL
S. Hada, H. Goto
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引用次数: 0

摘要

二叠纪中期,在东TethysPanthalassa地区发现了两个Neoshwagrinidae的进化谱系。这些是Misellina Cancellina ColaniaLepidolina和Misellina Maklaya Neoschwagerina Yabeina进化谱系。它们在潘塔拉萨地区形成了明显孤立的栖息地,分别被命名为Colania Lepidolina和Neoschwagerina Yabeina地区。通过对环太平洋增生杂岩的分析,结合大洋中部古环礁石灰岩中的fusulinoidean动物群及其放射虫化石阐明的增生时间,新提出了这两个地区的古地理分布。结果表明,Colania Lepidolina地区在潘塔拉萨中部扩展为古赤道地区,在南半球的南侧扩展为新天鹅洲Yabeina地区。在东古地中海,华南和中印大陆块在整个二叠纪期间都孤立在赤道地区,是引人注目的地区,其特征是ColaniaLepidolina进化谱系中Lepidolia的延伸。在日本群岛上,黑濑川、Hida Gaien、南北上和Maizuru带也以Lepidolina的出现为特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mid-Permian Fusulinoidean Territories in Panthalassa
Two evolutionary lineages of the Neoshwagerinidae are recognized in the East TethysPanthalassa region in the mid-Permian time. These are the Misellina-Cancellina-ColaniaLepidolina and Misellina-Maklaya-Neoschwagerina-Yabeina evolutionary lineages. They formed distinctly isolated habitats in the Panthalassa region and are named the Colania-Lepidolina and Neoschwagerina-Yabeina territories, respectively. The paleogeographic distribution of the two territories is newly presented with an analysis of the Circum-Pacific accretionary complex combining the fusulinoidean faunas in mid-oceanic paleo-atoll limestones and the timing of their accretion clarified by radiolarian fossils. It is concluded that the Colania-Lepidolina territory expanded into a paleo-equatorial area in mid-Panthalassa with the Neoschwagerina-Yabeina territory at its southern side in the southern hemisphere. In East Paleo-Tethys, South China and Indochina continental blocks which were isolated in equatorial regions throughout the Permian period are striking territories characterized by an extension of the Lepidolina of the ColaniaLepidolina evolutionary lineage. On the Japanese Islands, Kurosegawa, Hida Gaien, South Kitakami and Maizuru belts are also characterized by the occurrence of Lepidolina.
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
28
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