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.

我们通过此三叠纪/侏罗纪（T/J）微岩石学的边界研究项目获得了以下结果，1）tanelium tanuense被认为是Hettangian Age（最早的侏罗纪）的全球指数物种之一。考古磷酸化的拉西素和四核酸二核也是hetangian的良好指标。2）三叠纪的结束是由globolaxtorum tozeri，hagiastrid的最终发生的？ gen.et sp.Indet a和risella spp.3）特征性分类单元，海绵状分类群（Carter 1994）和Canoptum spp。观察到生物放射性的观察表明，Canoptum spp。对三叠纪末端危机的耐受性，因为其独特的喂养系统与其他灭绝的多幼虫不同。4）跨T/j边界的动物更换的模式在日本和夏洛特岛（Queen Charllotte群岛）中相似，虽然有相似之处。 5）日本，菲律宾，新西兰和加拿大之间的动物动物群比较，将动物变化细分为3阶段。

项目成果

Wang, Y., Yang, Q., Matsuoka, A., Kobayashi, K.et al.: "Jurassic radiolarians from the Yarlung Zangbo Suture Zone in the Jinlu area, Zetang County, southern Tibet"Acta Micropalaeontologica Sinica. 19. 215-227 (2002)

王Y.，杨Q.，松冈A.，小林K.等：“藏南泽当县金鲁地区雅鲁藏布江缝合带的侏罗纪放射虫”《微古生物学报》。

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。

Itaki, T., Matsuoka, A., Yoshida, K., Machidori, S., Shinzawa, M., Todo, T.: "Late spring radiolarian fauna in the surface water off Tassha, Aikawa Town, Sado Island, central Japan"Science Reports of Niigata University, Series E (Geology). No.18 (in press

Itaki, T.、Matsuoka, A.、Yoshida, K.、Machidori, S.、Shinzawa, M.、Todo, T.：“日本中部佐渡岛相川镇 Tassha 地表水中的晚春放射虫动物群

堀利栄, J.A.Grant-Mackie: "三畳紀後期Austral型Capnuchosphaera(放散虫)"日本古生物学会第151回例会講演予稿集. 39 (2001)

Toshiei Hori，J.A. Grant-Mackie：“晚三叠纪南方型 Capnuchosphaera（放射虫）”日本古生物学会第 151 届例会记录 39（2001 年）。