Russian Journal of Pacific Geology

, Volume 2, Issue 5, pp 412–421 | Cite as

First finds of Late Tithonian and middle-late Albian radiolarian assemblages in volcanogenic-siliceous rocks of the Amur River right lower reaches and their tectonic significance

  • A. N. Filippov
  • I. V. Kemkin
Article

Abstract

The lithological-stratigraphic study of volcanogenic-siliceous rocks developed on the left side of the Machtovaya River, a right tributary of the Amur River, yielded the first radiolarian assemblages of the late Late Tithonian, the late Late Tithonian-early Valanginian, and the middle-late Albian age. It is established that the stratigraphic succession of volcanogenic-siliceous rocks in this area is composed of upper Tithonian-Valanginian dark red to red-brown cherts with basalts in the lower part of the section and Albian dark gray clayey cherts, olive-gray siliceous-tuffaceous argillites, and tufaceous siltstones in its upper part. The replacement of cherts by their clayey varieties likely occurred in the Aptian. The composition, structure, and age of these strata and the rocks constituting the Kiselevka-Manoma accretionary complex are different, which indicates their different tectonic origin.

Key words

radiolarians Late Jurassic-Early Cretaceous volcanogenic-siliceous rocks Lower Amur River region 

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Copyright information

© MAIK Nauka 2008

Authors and Affiliations

  • A. N. Filippov
    • 1
  • I. V. Kemkin
    • 1
  1. 1.Far East Geological Institute, Far East BranchRussian Academy of SciencesVladivostokRussia

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