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  1. A500 情報学部/情報学研究科・情報文化学部・情報科学研究科
  2. A500a 雑誌掲載論文
  3. 学術雑誌

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/2237/10289
a768324a-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 SUGITANI_KENICHIRO_Redox_change_in_sedimentary_environments_of_Triassic_bedded_1998.pdf (1.0 MB)
Item type 学術雑誌論文 / Journal Article(1)
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

WEKO 23994

en SUGITANI, KENICHIRO

Search repository
MIMURA, KOICHI

× MIMURA, KOICHI

WEKO 23995

en MIMURA, KOICHI

Search repository
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 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
内容記述タイプ Abstract
出版者
言語 en
出版者 Cambridge University Press
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
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
フォーマット
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
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