The Iwanai Nappe in the Kamuikotan Tectonic Belt, Sothern Hokkaido, Japan
Jolivet, Laurent;Cadet, Jean-Paul
Permalink : http://hdl.handle.net/2115/36731
Abstract
The Sarugawa ultramafic mass is interpreted as a nappe here called the "Iwanai Nappe", resting, with its sedimentary cover, on a unit reworking ophiolitic rocks and Cretaceous Yezo deposits. The Iwanai Nappe has been emplaced toward the south-west from an area situated east of the "Yezo Syncline". The age of movement is inferred to be Eocene, contemporaneous with the beginning of the strike-slip movement in Hidaka belt. This structure is a good explanation for the Lower Cretaceous facies distribution in the concerned area.
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