[M-IS20] [JJ] 遠洋域の進化

[MIS20-P02] 科学的検証に耐えうるX線CTによる微化石標本の高精細形状計測

*木元 克典¹、久保田 好美²、佐々木 理³、岩下 智洋⁴、中村 由里子¹ (1.国立研究開発法人海洋研究開発機構、2.国立科学博物館、3.東北大学総合学術博物館、4.有限会社ホワイトラビット)

キーワード：微化石、マイクロX線CT、三次元形状計測、三次元モデル

Recent three dimensional (3D) morphometrics bring tremendous contributions for natural sciences. In the field of earth sciences, the acquisition of 3D morphometrics is rapidly increasing for the purpose of precise analysis of morphology of geological materials, especially for microfossils. In this study, we are trying to acquire the high resolution microtomography of microfossils by using the Microfocus X-ray Computed Tomography (MXCT). The combination of MXCT technique and high-precision X-ray detectors realize submicron-scaled morphology of microfossils without destruction on both the outer and the inner structures, therefore it is useful for classification, evolutions and functional morphology on microfossils.

The materials used in this study were microfossils from deep-sea sediments collected by the Deep Sea Drilling Project (DSDP) and Ocean Drilling Project (ODP) and other materials in modern ocean. So far, we already achieved the 3D microtomography for some species on foraminifers, radiolarians, diatoms and pteropods from each geological ages. In this presentation, we will show the reconstructed 3D images of the above specimens and discuss about the essentials for scientific validation on micropaleontological studies. In addition, we will discuss about 3D printing models by using the above 3D data for educational purposes.