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Redox change in sedimentary environments of Triassic bedded cherts, central Japan: possible reflection of sea-level change
http://hdl.handle.net/2237/10289
http://hdl.handle.net/2237/10289a768324a-b68f-4917-905b-1d933a6e3f41
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SUGITANI_KENICHIRO_Redox_change_in_sedimentary_environments_of_Triassic_bedded_1998.pdf (1.0 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2008-07-28 | |||||
| タイトル | ||||||
| タイトル | Redox change in sedimentary environments of Triassic bedded cherts, central Japan: possible reflection of sea-level change | |||||
| 言語 | en | |||||
| 著者 |
SUGITANI, KENICHIRO
× SUGITANI, KENICHIRO× MIMURA, KOICHI |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | Cambridge University Press | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Middle Triassic radiolarian bedded cherts in the Mino Belt, central Japan, include a sequence showing an abrupt facies change from the lower to the upper, where grey–black bedded cherts enriched in carbonaceous matter and framboidal pyrite are overlain by brick-red hematitic bedded cherts. Brownish-yellow chert enriched in goethite and purple-red chert occur at the boundary between the grey–black bedded cherts and the brick-red bedded cherts. This facies change is in accordance with stratigraphic variations of geochemical characteristics; the lower section grey–black bedded cherts, compared with the upper section brick-red bedded cherts, are enriched in C_tot and S_ tot, and are characterized by lower MnO/TiO_2, higher FeO/Fe_2O_3* (total iron as Fe_2O_3) and more variable Fe_2O_3*/TiO_2 values. Some of the lower section samples, in addition, are characterized by an enrichment in some transition metals (Ni, Cu, and Zn). The covariation of mineralogical and geochemical characteristics indicates that sedimentary environments and diagenetic processes were different between the lower and the upper section bedded cherts. During the deposition of the lower section bedded cherts, the sedimentary environment was anoxic and bacterial sulphate reduction occurred during the early diagenetic stage. In contrast, the upper section bedded cherts were subjected to less reducing diagenetic processes; active sulphate reduction did not occur. The change of sedimentary environment and diagenetic process at the site of deposition is likely to be attributed to the fluctuated concentration of dissolved oxygen in the water mass of a semi-closed marginal ocean basin, which was potentially caused by sea-level change that occurred during Middle Triassic time. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Cambridge University Press | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1017/S0016756898001587 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0016-7568 | |||||
| 書誌情報 |
en : Geological Magazine 巻 135, 号 6, p. 735-753, 発行日 1998-11 |
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| フォーマット | ||||||
| 値 | application/pdf | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/10289 | |||||
| 識別子タイプ | HDL | |||||
