Lyell Collection
Geological Society, London, Special Publications
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ishiwatari, A.
Right arrow Articles by Vysotskiy, S. V.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Geological Society, London, Special Publications; 2003; v. 218; p. 597-617;
DOI: 10.1144/GSL.SP.2003.218.01.30
© 2003 Geological Society of London

Regional Occurrence of Ophiolites and Geodynamics

Petrological diversity and origin of ophiolites in Japan and Far East Russia with emphasis on depleted harzburgite

Akira Ishiwatari1, Sergei D. Sokolov2 & Sergei V. Vysotskiy3

1 Department of Earth Sciences, Faculty of Science, Kanazawa University, Kanazawa 920-1192, Japan geoishw{at}kenroku.kanazawa-u.ac.jp
2 Geological Institute, Russian Academy of Sciences, Pyzhevsky 7, Moscow 109017, Russia
3 Far East Geological Institute, Russian Academy of Sciences, Prospect 100 letiya 159, Vladivostok 690022, Russia

Ophiolites are divided into lherzolite-type (L-type) and harzburgite-type (H-type) by the lithology of their mantle peridotites. Rare depleted harzburgite-type (DH-type) is distinguished from the normal H-type by the more refractory nature of its mantle peridotite and the occurrence of orthopyroxene-type cumulate rocks including iron-rich harzburgite and orthopyroxenite. The Shelting (Sakhalin) and Krasnaya (Koryak Mountains) ophiolites in Far East Russia, which have both depleted harzburgite and orthopyroxene-type cumulate rocks, belong to this newly defined DH-type. The ophiolites in SW Japan-Primorye, NE Japan-Sakhalin, and the Koryak Mountains in the northwestern Pacific margin have diverse ophiolite types ranging from L- to DH-types. The wide petrological diversity, the common occurrence of DH-type, and the presence of thick crustal sections in these ophiolites suggest regionally inhomogeneous, commonly very high degrees of mantle melting over subduction zones, as in the modern Mariana forearc environment. The ophiolites of Japan and Far East Russia range in age from Early Palaeozoic to Cenozoic and are tectonically underlain by younger blueschists and accretionary complexes. The spatial association of these ophiolites with blueschists is analogous to the ophiolite-blueschist assemblages recovered from the Mariana forearc. This association might have formed in a period of non-accretion at an oceanic subduction zone that was followed by voluminous accretion of sediments, facilitating subsequent uplift of the ophiolites and blueschists.





This article has been cited by other articles:


Home page
 Geological Society, London, Special PublicationsHome page
Y. Dilek
Ophiolite pulses, mantle plumes and orogeny
Geological Society, London, Special Publications, 2003; 218: 9 - 19.
[Abstract] [PDF]