書誌事項
- タイトル別名
-
- Significance of peridotite samples from the oceanic core complex: role of melt on mantle heterogeneity beneath mid-ocean ridge
- 特集 マントル起源物質解読 : 知りたいこと,読めること,読みたいこと(その5)海洋コアコンプレックスから得られたかんらん岩の重要性 : 中央海嶺下マントル物資の不均質性とメルトの存在
- トクシュウ マントル キゲン ブッシツ カイドク : シリタイ コト,ヨメル コト,ヨミタイ コト(ソノ 5)カイヨウ コアコンプレックス カラ エラレタ カンランガン ノ ジュウヨウセイ : チュウオウカイレイカ マントル ブッシ ノ フキンシツセイ ト メルト ノ ソンザイ
この論文をさがす
抄録
Abyssal peridotite is widely accepted as residual mantle material after partial melting and melt extracted beneath mid-ocean ridge, and is contributed to understanding of magmatism forming oceanic lithosphere. Peridotite samples from the oceanic core complex of the ridge-transform intersection corner high recently provide new insight of upper mantle material inhomogeneity in terms of degree of melting and further melt-related processes. Compiling data of Cr# [Cr/(Cr+Al) atomic ratio] of spinel and clinopyroxene REE compositions of abyssal peridotite from the slow- and ultraslow-spreading mid-ocean ridges, accumulated since 1980s, demonstrate that depleted peridotites are dominantly collected from the oceanic core complex and abyssal plane at shallower depth (<2500 m below sea level), contrasting to relatively fertile peridotite from the transform wall at deeper part of the fracture zone. Various enrichment of clinopyroxene REE compositions in such depleted peridotite reflects that the melt is involved in or after the partial melting stage. The compiling data suggest that the compositional variation of abyssal peridotite is dependent on the mid-ocean ridge structure and that the inhomogeneity of upper mantle material is recognized in regional scale, contrasting to the global-scale inhomogeneity already discussed in previous abyssal peridotite studies. Drilled core peridotite samples from the Atlantis Massif, Mid-Atlantic Ridge 30°N are good example to reveal that the melt penetration into residual peridotite is an important role for creating inhomogeneity of rock-sample scale on the oceanic core complex formation.<br>
収録刊行物
-
- 岩石鉱物科学
-
岩石鉱物科学 42 (5), 221-231, 2013
一般社団法人 日本鉱物科学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390001206524771584
-
- NII論文ID
- 130003382975
-
- NII書誌ID
- AA1146088X
-
- ISSN
- 13497979
- 1345630X
-
- NDL書誌ID
- 025061936
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
-
- 抄録ライセンスフラグ
- 使用不可
