揮発性元素の沈み込みはマントルのどこまで及んでいるのか?

DOI Web Site 参考文献170件
  • 角野 浩史
    東京大学大学院理学系研究科附属地殻化学実験施設

書誌事項

タイトル別名
  • Subduction of volatiles into the Earth's mantle
  • 地球化学の最前線 揮発性元素の沈み込みはマントルのどこまで及んでいるのか?
  • チキュウ カガク ノ サイゼンセン キハツセイ ゲンソ ノ シズミ コミ ワ マントル ノ ドコ マデ オヨンデ イル ノ カ?

この論文をさがす

抄録

Subduction volcanism generally forms a "subduction barrier" that efficiently recycles water and other volatiles (carbon, nitrogen, sulfur, halogens, and noble gases) contained in subducted slabs back to the Earth's surface. In this contribution, current knowledge of volatile budgets in subduction zones is reviewed. Although most of the bound water in hydrous minerals in subducting altered oceanic crust and sediments is recycled back to the surfaces of subduction zones, the serpentinized slab mantle carries a significant portion of such water into a depth beyond arcs. Carbon and sulfur seem to be subducting to the deep mantle effectively, whereas nitrogen behavior is enigmatic. Recent findings on seawater-like heavy noble gases in the convecting mantle, as well as on the noble gases and halogens of sedimentary pore water origin in exhumed mantle wedge peridotites and slab mantle serpentinites, suggest that surface noble gases and halogens are readily incorporated into hydrous minerals in oceanic lithospheric mantle and that their incomplete removal via subduction zone metamorphism results in further subduction of the volatiles to a great depth into the mantle. Further investigations on volatiles in deep-mantle derived samples and the experimental constraints on the behaviors of trace volatiles during the metamorphism of the subducting slab are necessary to reveal the global volatile budgets in the Earth's interior.

収録刊行物

  • 地球化学

    地球化学 46 (3), 149-170, 2012

    一般社団法人日本地球化学会

参考文献 (170)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ