Kametaka, Masao

Kemkin, Igor' V.

Kojima, Satoru

Radiolarian biostratigraphic research is done for chert-clastic sequence of the Taukha terrane in the Koreyskaya River area, Far East Russia. Three successive radiolarian assemblages have been distinguished from the lower thrust sheet of the Gorbousha unit ; they are the Xitus gifuensis, Stichomitra doliolum and Pseudodictyomitra carpatica assemblages in ascending order. The lower two assemblages are extracted from the cherty part of the section, and the youngest one is from siliceous mudstone and black mudstone. The transitional facies of chert-clastic sequence in the sheet is late Late Tithonian in age. This age is different from that in the second thrust sheet of the Dalnegorsk area which is Late Kimmeridgian to Middle Tithonian. Therefore the approach of the Gorbousha unit-bearing oceanic plate to the subduction zone ranges in age, at least, from Late Kimmeridgian to Berriasian. The difference of age in two different thrust sheets possibly indicates that the duplication of chert-clastic sequences in the Gorbousha unit resulted from successive accretion of oceanic plate.国立情報学研究所で電子化したコンテンツを使用している

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Radiolarian biostratigraphy for transitional facies of chert-clastic sequence of the Taukha terrance in the Koreyskaya River area, Southern Sikhote-Alin, Russia

Radiolarian biostratigraphy for transitional facies of chert-clastic sequence of the Taukha terrance in the Koreyskaya River area, Southern Sikhote-Alin, Russia

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