The Journal of the Geological Society of Japan
Online ISSN : 1349-9963
Print ISSN : 0016-7630
ISSN-L : 0016-7630
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Outline of the shear zones in the Kuzuryu area, Hida Gaien belt, Fukui Prefecture, central Japan
Shigeru OtohMasakazu NiwaKazuhiro TsukadaMasashi AoyamaTakayuki Matsumoto
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2004 Volume 110 Issue 10 Pages 598-607

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Abstract

Structural studies of the Kuzuryu area of the Hida Gaien belt, central Japan, have revealed that most Paleozoic geologic units in the area are bounded by shear zones. Among the shear zones, at least four brittle-ductile shear zones have dextral strike-slip component, whereas the cataclastic shear zone that marks the southern boundary of the Hida Gaien belt has sinistral strike-slip component. The dextral shear zones cut the Motodo Formation, which yield Early Jurassic granite pebbles, but do not cut the Early Cretaceous Tetori Group, whereas the sinistral shear zone cuts the Early Cretaceous Tetori Group. It is suggested that the dextral shear zones were active in Early Jurassic to Early Cretaceous times, whereas the sinistral shear zone was active in Cretaceous time.

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© 2004 by The Geological Society of Japan
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