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Russian Geology and Geophysics

2008 year, number 10

Structure of terranes in a Jurassic accretionary prism in the Sikhote-Alin-Amur area: implications for the Jurassic geodynamic history of the Asian eastern margin

I.V. Kemkin
Far Eastern Geological Institute, Far Eastern Branch of the RAS, 159 prosp. Stoletiya Vladivostoka, Vladivostok, 690022, Russia
Keywords: Accretionary prism; terrane; tectonostratigraphic unit; accretion; subduction; subduction melange; radiolarian analysis; Sikhote-Alin
Pages: 759-770


A Jurassic accretionary prism in the Sikhote-Alin-Amur area is an assembly of terranes, which are tectonic-sedimentary complexes consisting of multiple strongly deformed fragments of an oceanic plate. The stack of tectonic-stratigraphic units (complexes) in the prism section records its geodynamic history, each unit being signature of a geologic event on the Paleoasian eastern margin. The succession of accretion events brought together fragments of a Paleozoic oceanic plateau in the Early Jurassic and abyssal plain fragments of different ages in Middle and Late Jurassic time.