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Fourier Analysis of Growth Pattern of a Precambrian Stromatolite for Palaeo-Geochronology
https://kindai.repo.nii.ac.jp/records/11207
https://kindai.repo.nii.ac.jp/records/112079afd29ce-6d2a-4ac7-a77d-7551351b6761
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
AN10074306-19920130-0081.pdf (547.0 kB)
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| Item type | ☆紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||
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| 公開日 | 2015-03-13 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Fourier Analysis of Growth Pattern of a Precambrian Stromatolite for Palaeo-Geochronology | |||||||||||||
| 言語 | en | |||||||||||||
| 著者 |
Koyama, Kouichi
× Koyama, Kouichi
× Ohara, Soji
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| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| キーワード | ||||||||||||||
| 主題 | Palaeo-Geochronology, Stromatolite, Fourier Analysis, Distance of Moon | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||
| 資源タイプ | departmental bulletin paper | |||||||||||||
| 著者(英) | ||||||||||||||
| 言語 | en | |||||||||||||
| 値 | Koyama, Kouichi | |||||||||||||
| 著者(英) | ||||||||||||||
| 言語 | en | |||||||||||||
| 値 | Ohara, Soji | |||||||||||||
| 著者 所属 | ||||||||||||||
| 値 | RIST Kinki University | |||||||||||||
| 著者 所属 | ||||||||||||||
| 値 | Nara Sangyo University | |||||||||||||
| 著者所属(翻訳) | ||||||||||||||
| 値 | 近畿大学理工学総合研究所 | |||||||||||||
| 著者所属(翻訳) | ||||||||||||||
| 値 | 奈良産業大学 | |||||||||||||
| 版 | ||||||||||||||
| 出版タイプ | VoR | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||
| 出版者 名前 | ||||||||||||||
| 出版者 | 近畿大学理工学総合研究所 | |||||||||||||
| 書誌情報 |
理工学総合研究所研究報告 en : Annual reports by Research Institute for Science and Technology 巻 4, p. 81-85, 発行日 1992-01-01 |
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| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 09162054 | |||||||||||||
| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | [Abstract] The growth pattern of Infra-Cambrian (ca.650-800Ma) stromatolite is studied by means of the personal image analyzing system (PIAS). Between the strong dark-colored rings, more than ten finer dark-colored stripes are visible on the polished surface. The CCD image of these concentric ring pattern is then Fourier analyzed. The number of these stripes should give palaeo-astrometric information, if the annual and monthly ring formations could be identified. Two types of image analyses are employed for counting the number of finer rings between the consecutive strong dark-colored rings. In one case, only the intermediate scale corresponding to finer stripes in the direction parallel to them are taken into account in the inverse Fourier transform, minimizing disturbances from smaller scales on the counting of finer rings. In another approach, the edge enhanced image is traced in the direction perpendicular to the ring structure at several positions. The tracings are analyzed in the fast Fourier transform (FFT), giving the representative wave number of the finer ring structure. The results of both types of analysis show that the average number of finer stripes (months) between consecutive strong dark-colored rings (one year) to be surely exceeding twelve. Thus, the periodicity of the primitive plant life in Infra-Cambrian era is estimated to be about 13 months per year. The moon was about 5 per cent closer to the earth than today. | |||||||||||||
| フォーマット | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | application/pdf | |||||||||||||
