Construction of Global standard of micropaleontology at the Triassic/Jurassic boundary

三叠纪/侏罗纪边界微体古生物学全球标准构建

• 批准号: 13640471
• 负责人: HORI Rie
• 金额: $ 1.02万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640471/
• 关键词: Radiolaria; Biostratigraphy; Inuyama; Triassic; Jurassic boundary; Mass extinction; IGCP 458; Queen Charlotte Islands; International correlation; 放散虫; 生層序; T; J境界; ジュラ系; ニュージーランド:カナダ

We have obtained the following results through this Triassic/Jurassic (T/J) boundary research project on micropaleontology,1) Pantanellium tanuense is considered to be one of global index species of Hettangian age (Earliest Jurassic). Archaeocenosphaera laseekensis and Praehexasaturnalis tetraradiatus are also good indicators for the Hettangian.2) The end of Triassic is marked by the final occurrences of Globolaxtorum tozeri, Hagiastrid? gen.et sp.Indet A, and Risella spp.3) The characteristic taxa, Spongotrochus sp.(Carter 1994) and Canoptum spp.are recognized, which occur across the T/J boundary surviving the mass extinction at the end of Triassic. Observation of Living Radiolaria suggests that the Canoptum spp.have tolerance of the crisis of end of the Triassic because of its unique feeding system that differs from other extinct multicyrtids.4) The pattern of the faunal turnover across the T/J boundary is similar between Japan (Inuyama) and Canada (Queen Charlotte Islands) although there are differences among faunal contents and dominated species. The faunal change is subdivided into 3 stages.5) Trough faunal comparison between Japan, Philippine, New Zealand and Canada, the faunal affinity around the T/J boundary is strong between Japan and Philippine, and also New Zealand and Canada.

通过三叠纪/侏罗纪界线微体古生物学研究项目，我们获得了以下成果：1）Pantaneltanuense被认为是Hettangian时代（早侏罗世）的全球性标志种之一。Archaeocenosphaera laseekensis和Praehexasaturnalis tetraradiatus也是Hettangian的良好指示物。gen.et 3）特征类群Spongotrochus sp.（Carter 1994）和Canoptum spp.，它们跨越T/J边界，在三叠纪末的大灭绝中幸存下来。对放射虫的观察表明，由于其独特的摄食系统，Canoptum spp.具有较强的耐受性，从而使其能够抵御三叠纪末期的危机。4）日本（犬山）和加拿大（夏洛特女王群岛）的跨T/J界线区系更替模式相似，但区系组成和优势种存在差异。（5）日本、菲律宾、新西兰和加拿大之间的槽区动物比较，日本与菲律宾、新西兰与加拿大之间的T/J界线附近的动物亲缘关系较强。

项目成果

竹村厚司, 相田吉昭, 酒井豊三郎, 堀利栄, 小玉一人 他: "ニュージーランド北島,ワイパパテレーンの放散虫化石"古生物学トピックス. 2. 17-24 (2001)

Atsushi Takemura、Yoshiaki Aida、Toyozaburo Sakai、Toshie Hori、Hitoshi Kodama 等：“来自新西兰北岛 Waipapa 地体的放射虫化石”古生物学主题 2. 17-24 (2001)。

松岡 篤: "現生放散虫研究の手法と研究機器"化石. 71. 19-27 (2002)

Atsushi Matsuoka：“现代放射虫研究的方法和研究设备”《化石》71. 19-27 (2002)。

Tamura, K., Sakumoto, T., Yabe, H., Matsuoka, A., et al.: "Bottom sediments and benthic faunas off the Tassha in Sado Island, Niigata Prefecture, Japan"Science Reports of Niigata University Series E (Geology). 17. 27-41 (2002)

Tamura, K.、Sakumoto, T.、Yabe, H.、Matsuoka, A. 等人：“日本新泻县佐渡岛 Tassha 的底部沉积物和底栖动物群”新泻大学科学报告 E 系列（

Takemura, A., Aita, Y., Hori, R.S., et al.: "Triassic radiolarians from the ocean-floor sequence of the Waipupa Terrane at Arrow Rocks, Northland, New Zealand"New Zealand Journal of Geology and Geophysics. 45. 289-296 (2002)

Takemura, A.、Aita, Y.、Hori, R.S. 等人：“来自新西兰北部地区箭岩 Waipupa 地体海底序列的三叠纪放射虫”新西兰地质与地球物理学杂志。

Matsuoka, A., Zamoras, L.R.: "Jurassic accretionary complex in the North Palawan Block, Philippines : Southwestern extinction of Jurassic accretionary complex in Japan"Topics in Paleontology. No.2. 31-38 (2001)

松冈，A.，萨莫拉斯，L.R.：“菲律宾北巴拉望地块的侏罗纪增生杂岩：日本侏罗纪增生杂岩的西南灭绝”古生物学主题。