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Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event
https://repo.qst.go.jp/records/78924
https://repo.qst.go.jp/records/78924fe7b560d-6ee2-4266-ae42-d4430059fda1
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-01-16 | |||||
| タイトル | ||||||
| タイトル | Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
丸岡照幸
× 丸岡照幸× 西尾嘉朗× 小木曽哲× 鈴木勝彦× 大澤崇人× Hatsukawa, Yuuichi× Hatsukawa, Yuuichi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Chalcophile elements are enriched in the Cretaceous–Paleogene (KPg) boundary clays from Stevns Klint, Denmark. As the concentrations of Cu, Ag, and Pb among several chalcophile elements such as Cu, Zn, Ga, As, Ag, and Pb are correlated with those of Ir, we suggest that these elements were supplied to the oceans by processes related to the endCretaceous asteroid impact. Synchrotron Xray fluorescence images revealed that Cu and Ag exist as trace elements in pyrite grains or as 1–10-µm-sized discrete phases specifically enriched in Cu or Ag. The difference in carrier phases might depend on the materials that transported these elements to the seafloor. Based on their affinities with Cu, Ag, and Ir, iron oxides/hydroxides and organic matter were identified as the potential carrier phases that supplied these elements to the seafloor. Chalcophile elements adsorbed on iron oxides/hydroxides might have been released during reductive dissolution of iron oxides/hydroxides and incorporated into the pyrite produced simultaneously with the reductive dissolution of iron oxides/hydroxides. Both iron oxides/hydroxides and chalcophile elements were possibly released from the KPg target rocks (i.e., sedimentary rocks and/or basement crystalline rocks) by impact heating. Elements with a high affinity to organic matter would have been released upon its degradation and then converted into discrete minerals because of the deficiency in Fe ions. | |||||
| 書誌情報 |
Geological Society of America Bulletin 巻 132, 号 9-10, p. 2055-2066, 発行日 2020-02 |
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| 出版者 | ||||||
| 出版者 | Geological Society of America | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0016-7606 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1130/B35403.1 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/doi/10.1130/B35403.1/580975/Enrichment-of-chalcophile-elements-in-seawater?redirectedFrom=fulltext | |||||
