Carbon recycled into deep Earth: Evidence from dolomite dissociation in subduction-zone rocks

Yongfeng Zhu*, Yoshihide Ogasawara

*この研究の対応する著者

研究成果査読

91 被引用数 (Scopus)

抄録

The dolomite-dissociation textures documented here in rocks from the Kokchetav ultrahigh-pressure massif suggest that the experimentally expected dolomite dissociation happened in the subducted slabs represented by these rocks. Two reactions, magnesite = C + MgO + O2, and majoritic garnet + MgO + H2O = garnet + clinochlore, recorded in carbonate inclusions and the host majoritic garnet are responsible for generation of graphite and clinochlore during the exhumation. The dolomite dissociation indicates that carbonate materials were subducted to depths of > 250 km below Earth's surface. Such deep subduction evidently brings abundant carbon and carbonate into deep Earth.

本文言語English
ページ(範囲)947-950
ページ数4
ジャーナルGeology
30
10
DOI
出版ステータスPublished - 2002 10
外部発表はい

ASJC Scopus subject areas

  • 地質学

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