Bending-Related Topographic Structures of the Subducting Plate in the Northwestern Pacific Ocean - Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin - page 26

142°E 143°E

35°N 35°N

KFZ

PF

34°N 34°N

KR

PF

33°N 33°N

MG

32°N 32°N

142°E 143°E

Fig. 18 Distribution of bending-related topographic structures in the northern Izu-Ogasawara
Trench. Dotted lines represent the topographic structures related to the abandoned propagating
spreading ridge. Broken lines illustrate the topographic structures related to Kashima Fracture
Zone. MG Mogi Seamount, KR KAIREI Ridge, PF pseudofault, KFZ Kashima Fracture Zone.
Other conventions are identical to Fig. 9

of most bending-related topographic structures is a symmetric graben. Asymmetric
or half grabens are also observed.
Most of bending-related topographic structures identified north of 33°N have an
NNW-SSE strike (Fig. 18 ). The strike is the same as that of trench axis between 33°N
and 33°30¢N. There are bending-related topographic structures with an N-S strike
around the Mogi Seamount. The bending-related topographic structures with an N-S