Foraminiferal fauna and limestone lithology of the Upper Permian, and paleogeographic and tectonic implications

本研究旨在通过对晚二叠世有孔虫的岩性和系统发育、时空分布、特征类群和动物群组成的研究，探讨晚二叠世有孔虫的古生物地理特征及其构造意义，包括石灰岩块体地质单元的起源、漂移和侵位。尽管本研究项目取得的大部分成果尚未发表，但已积累了一些重要成果，可供进一步研究。在上三叠统矿群的Tsunemori组(Akiyoshi Terrane的上二叠统增生杂岩)和不整合上覆的Hirabaru组中，详细研究了石灰岩块体和碎屑的石灰岩岩性和有孔虫动物群。The…进一步证明，原被认为是平原组底部砾岩的“高口灰岩”或“高口组”更合理地被归入与矿群分离的Tsunemori群。高知町地区上二叠统三台群的有孔虫生物地层学和动物群研究结果表明，该组上部属于长新系，而不是以前认为的乌家坪组。从野外观察和有孔虫动物群分析可知，京都地区麦祖鲁地体的石灰岩岩块中有鳞片石灰岩和具有Colaniella-Nanlingella石灰岩的奇特块体之间存在较深的斜坡沉积，没有显示出Kobayashi(2003)所认为的任何地层关系。根据以往积累和新获得的资料，发表了兵库县Maizuru群有孔虫动物群的3篇论文。根据兵库市自然与人类活动博物馆保存的由古生代和中生代石灰岩薄片组成的小林文雄有孔虫标本收藏，将该收藏的模式标本汇编为数据库，包含登记数量、种类、类型、分类、岩石单位、年龄、地点、参考资料和显微照片等基本信息。较少

The purpose of this study is to discuss collectively the Late Permian paleobiogeography of foraminifers and tectonic implications including the origin, drift, and emplacement of the geologic unit with limestone blocks, based on the examination of limestone lithology and phylogeny, time-space distribution, characteristic taxa and faunal composition of Late Permian foraminifers among areas as well as terranes A serial field survey has been performed in many limestones and many limestone thin sections have been prepared to carry out this research project. Although most of results obtained in the term of this, research project have not been published, some important results have been accumulated available for further study.Limestone lithology and foraminiferal fauna of limestone blocks and clasts were examined in detail in the Tsunemori Formation (Upper Permian accretionary complex in the Akiyoshi Terrane) and unconformably overlying Hirabaru Formation of the Upper Triassic Mine Group. The … More y show that the "Takiguchi Limestone" or the "Takiguchi Formation" formerly thought to be the basal conglomerate of the Hirabaru Formation is more reasonably included into the Tsunemori Group separating from the Mine Group.The results of foraminiferal biostratigraphy and faunas of the Upper Permian Mitai Group in the Takachiho area reveal that the upper part of the formation is assignable to the Changhsingian and not to the Wuchiapingian as previously thought. The Wuchiapingian age assignment is also applicable to the top of the Akasaka Limestone.From the field observation and foraminiferal faunal analysis between exotic blocks of the limestone conglomerate with Lepidolina and he limestone having Colaniella-Nanlingella in the Maizuru Terrane of the Kyoto Prefecture, the Maizuru Group is proved to be a deeper slope deposit without showing any stratigraphic relation as considered by Kobayashi (2003). Three papers of foraminiferal faunas of the Maizuru Group in the Hyogo Prefecture were published on the basis of the data previously accumulated and newly obtained.Concerning the FUMIO KOBAYASHI COLLECTION consisting of Paleozoic and Mesozoic limestone thin sections with foraminifers kept in the Museum of Nature and Human Activities of Hyogo, the type specimens of the collection have compiled as a database with basic information such as registered number, species, type, taxonomy, rock unit, age, locality, reference, and photomicrograph. Less