Toward creation of Chemical paleontology

迈向化学古生物学的创建

• 批准号: 23654176
• 负责人: KOMIYA Tsuyoshi
• 金额: $ 2.33万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23654176/
• 关键词: 放射光 X 線 Micro-CT; 化学古生物学; カンブリア紀; カンブリア爆発; 後生動物化石; 微小硬骨格動物化石; 放射光X線Micro-CT; SPring-8; 微小硬骨格化石; 化石三次元像解析; エディアカラ紀; 最古後生動物化石; 後生動物出現

It is difficult to investigate the origins of fossils whose structures are very common or have no modern equivalents based on the morphology. Recently, it is controversial whether globular fossils in the Ediacaran originate from the oldest animal embryos or colonized large bacteria. We carried out in-situ FT-IR analyses of the oldest animal embryo fossils and found organic molecular evidence for the eukaryotes, namely metazoans. We conducted synchrotron X-ray Micro-CT analyses of the oldest cnidarian polyp fossils to observe the internal structures. We found clear pentaradial structures inside, suggesting the early Cnidaria did not have radial structures but bilateral structures.

对于结构非常普遍或没有现代同类的化石，很难根据形态来调查其起源。最近，关于埃迪卡拉纪的球状化石是来自最古老的动物胚胎还是大型细菌的定植存在争议。我们对最古老的动物胚胎化石进行了原位FT-IR分析，发现了真核生物（即后生动物）的有机分子证据。我们对最古老的刺胞动物水螅化石进行同步x射线显微ct分析，观察其内部结构。我们发现了明显的五辐体结构，表明早期刺胞菌没有径向结构，而是双侧结构。

项目成果

The anomalous Ca cycle in the Ediacaran ocean: Evidence from Ca isotopes preserved in carbonates in the Three Gorges area, South China

埃迪卡拉纪海洋的异常Ca循环：来自华南三峡地区碳酸盐岩中Ca同位素的证据

• DOI: 10.1016/j.gr.2013.03.008
• 发表时间: 2014-04
• 期刊: Gondwana Research
• 影响因子: 6.1
• 作者: Takafumi Hirata;Shigenori Maruyama;Jian Han;Degan Shu
• 通讯作者: Degan Shu

Synchrotron X-ray micro-CT analyses of the early Cambrian microfossils: Decoding of the early evolution of Metazoa, Japan Geoscience Union Meeting 2013

早期寒武纪微化石的同步加速器 X 射线显微 CT 分析：解码后生动物的早期演化，日本地球科学联盟会议 2013

• 发表时间: 2013
• 作者: Komiya;T.;Nakao;T.;Uesugi;K.;Han;J.
• 通讯作者: J.

In situ iron isotope analyses of pyrite and organic carbon isotope ratios in the Fortescue Group: Metabolic variations of a Late Archean ecosystem

• DOI: 10.1016/j.precamres.2012.05.003
• 发表时间: 2012-08
• 期刊: Precambrian Research
• 影响因子: 3.8
• 作者: Kazumi Yoshiya;M. Nishizawa;Y. Sawaki;Y. Ueno;T. Komiya;Keita Yamada;N. Yoshida;T. Hirata;H. Wada;S. Maruyama

Search for Early Archean mantle lacking the late-veneer component

寻找缺乏晚饰面成分的早期太古代地幔

• 发表时间: 2012
• 作者: Ishikawa;A.
• 通讯作者: A.

Irreversible change of the oceanic carbon cycle in the earliest Cambrian: High-resolution organic and inorganic carbon chemostratigraphy in the Three Gorges area

最早寒武纪海洋碳循环的不可逆变化：三峡地区高分辨率有机和无机碳化学地层学

• 发表时间: 2013
• 期刊: South China.Precambrian Research
• 作者: Ishikawa;T.;Ueno;Y.;Shu;D.;Li;Y.;Han;J.;Guo;J.;Yoshida;N.;Komiya;T.
• 通讯作者: T.