New model for the Early Cretaceous development of SW Japan based on basic rocks of the Chichibu Composite Terrane

Recognizing OIB and MORB in accretionary complexes: A new approach based on ocean plate stratigraphy, petrology and geochemistry

“…The volcanic rocks of the Chichibu AC are dominated by olivine and clinopyroxene porphyric basalt and mafic volcaniclastics with subordinate plagioclase porphyrite, dolerite, tuff and aphyric lava (Ishizuka et al, 2003;Onoue et al, 2004;Safonova et al, 2015a). The Mikabu belt is dominated by mafic-ultramafic bodies (Toba complex), alkaline and tholeiitic basaltic lavas, coarse-and fine-grained pyroclastic rocks (Nakamura, 1971;Nakayama, 1983;Ozawa et al, 1997;Kato and Saka, 2006). The Mikabu samples under study are porphyric and aphyric basalts and mafic cumulates ( Fig.…”

Oceanic island basalts in accretionary complexes of SW Japan: Tectonic and petrogenetic implications

“…1). The Chichibu AC includes the Early Cretaceous Sambosan belt, which hosts voluminous Triassic OIB-type basalts and Middle Triassic-Early Jurassic chert and siliceous mudstone (Ishizuka et al, 2003;Kato and Saka, 2006; Fig. 2A).…”

U‐Pb Dating and Lu‐Hf Isotopes of Detrital Zircons From the Southern Sikhote‐Alin Orogenic Belt, Russian Far East: Tectonic Implications for the Early Cretaceous Evolution of the Northwest Pacific Margin

“…It is noted that strike‐slip faulting is also emphasized by the “collisional orogeny” and “accretionary orogeny” models, although it is not considered to be the only/major geodynamic mechanism. For example, the post‐collision strike‐slip faulting was important in reworking of the south Kitakami‐Kurosegawa continental block after its collision with the hinterland of Japan (Charvet, ; Kato & Saka, , ). In the previous models for Sikhote‐Alin, the “terranes” were suggested to be built near South China and then moved northward to its present location by sinistral strike‐slip faulting (Natal'in, ).…”