Origin of the Mineoka Ophiolite.
-
- SATO Hiroshi
- Doctoral Program in Geoscience, University of Tsukuba
-
- TANIGUCHI Hidetsugu
- Ocean Research Institute, University of Tokyo
-
- TAKAHASHI Naoki
- Komazawa Univeristy High School
-
- MOHIUDDIN Mia Mohammad
- Chiba Prefectural Museum and Institute
-
- HIRANO Naoto
- Department of Geology and Mining, University of Rajshahi, Bangladesh (Geological Survey of Japan)
-
- OGAWA Yujiro
- Institute of Geoscience, Univeristy of Tsukuba
Bibliographic Information
- Other Title
-
- 嶺岡オフィオライトの起源
- ミネオカ オフィオライト ノ キゲン
Search this article
Abstract
Geological, petrological, and biostratigraphical studies of Mineoka ophiolite and related rocks, Hayama and Mineoka Belts, central Japan, were reviewed, and the origin of ophiolite is summarized as follows. 1) Pelagic to hemipelagic sedimentary rocks occur from late Paleocene to middle Miocene. 2) Basaltic rocks in the Hayama Belt are mostly alkali basalts of hotspot origin, whereas those in the Mineoka Belt are mostly tholeiite of mid-ocean ridge origin. 3) Chemical compositions of gabbros and diorites indicate island arc origin. 4) Peridotites are residues after a medium degree of partial melting. These facts arenot consistent with previous ideas that the ophiolite is island arc or back arc originonly. “It is concluded that ophiolite is part of the Mineoka plate” in the Pacific Ocean side, not in the Philippine Sea as previously proposed. Reconstruction of plate motions of the Mineoka plate is proposed, as it was formed at mid-ocean ridge, was subducted by the Pacific plate, and obducted to the Honshu arc during Miocene age after the eastward motion of the triple junction.
Journal
-
- Journal of Geography (Chigaku Zasshi)
-
Journal of Geography (Chigaku Zasshi) 108 (3), 203-215, 1999
Tokyo Geographical Society
- Tweet
Details 詳細情報について
-
- CRID
- 1390001204229250944
-
- NII Article ID
- 10004724984
- 10010385967
-
- NII Book ID
- AN00322536
-
- COI
- 1:CAS:528:DyaK1MXmt12is70%3D
-
- ISSN
- 18840884
- 0022135X
- http://id.crossref.org/issn/0022135X
-
- NDL BIB ID
- 4774042
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed