Alkaline leaching characteristics of biogenic opal in Eocene sediments from the central Arctic Ocean: A case study in the ACEX cores

Shinya Iwasaki, Kozo Takahashi, Yusuke Ogawa, Seiichiro Uehara, Christoph Vogt

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

Accurate knowledge of the extent of biogenic opal preservation in marine sediment cores is important for paleoceanographic reconstructions. The alkaline leaching method is widely employed for %biogenic opal analysis due to its ease and speed. In this study, a revised method for measuring %biogenic opal in sediment from arctic coring expedition samples was suggested. The studied middle Eocene sediments from the central Arctic Ocean presented a problem in insufficiently leaching biogenic opal with a Na2CO3 solution. Based on XRD analysis, it was suggested that such an alkaline resistance results from slight diagenesis of biogenic opal. In order to solve this problem, an alkaline leaching method utilizing a 2 M NaOH solution was suggested for the accurate measurement of %biogenic opal in the Eocene sediments from the central Arctic. Furthermore, dissolution rates from lithogenic matter by NaOH solution were measured in order to correct the %biogenic opal values.

本文言語英語
ページ(範囲)241-249
ページ数9
ジャーナルJournal of Oceanography
70
3
DOI
出版ステータス出版済み - 1 2014

All Science Journal Classification (ASJC) codes

  • Oceanography

フィンガープリント 「Alkaline leaching characteristics of biogenic opal in Eocene sediments from the central Arctic Ocean: A case study in the ACEX cores」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル