RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 7, ES5002, doi:10.2205/2005ES000190, 2005

Introduction

[2]  In modern tectonic studies, the East Asian continental margin is treated as a collision-accretion feature, produced by the complex combination, in space and time, of accretion and collision processes, as well as of the transform fault movements of both individual terrains and their assemblages [Bogdanov and Khain, 2000; Chekhovich, 1993; Golozubov, 2004; Isozaki, 1996; Khanchuk, 1993; Maruyama et al., 1997; Natal'in, 1991; Parfenov et al., 1999, 2003; Rozhdestvenskii, 1993; Sokolov, 1992, 2003; Sokolov et al., 1997; Zonenshain et al., 1990].

2005ES000190-fig01
Figure 1
[3]  One of the key positions in the structure of the continental margin is occupied by the terrains of the accretion prisms of different ages (Figure 1), which recorded the time and mechanisms of the continental growth. The subduction, turbidite, and island-arc terranes, associated with them, produced the lateral series of structural features and allow one to reconstruct the old continent-ocean transition zones. In the modern structural pattern of the continental margin, these lateral rock series are seen to have been disturbed significantly by the late Mesozoic large size strike-slip movements along the margin, and by the Cenozoic destructive pull-apart and strike-slip movements which operated during the opening of the Sea of Japan and the Sea of Okhotsk basins.

[4]  To a lesser extent these movements complicated the structural features of the Late Mesozoic-Cenozoic Hokkaido-Sakhalin fold system, represented by the structural features of the Sakhalin and Hokkaido islands, a connecting link between them being South Sakhalin. Over the whole length of this fold system, its eastern segments, including those of South Sakhalin, represent a complex zone of the connection of the oceanic structural features and those of the continental margin, providing good objects for reconstructing the evolution of the transitional zone.

[5]  Presented in this paper are the new data available for the geology and tectonics of Southeast Sakhalin, which add to the knowledge of the structure and tectonic history of the Hokkaido-Sakhalin accretion-type fold system and offer new tectonic reconstructions for the East Asia continental margin for Cretaceous-Paleogene time.


RJES

Citation: Zharov, A. E. (2005), South Sakhalin tectonics and geodynamics: A model for the Cretaceous-Paleogene accretion of the East Asian continental margin, Russ. J. Earth Sci., 7, ES5002, doi:10.2205/2005ES000190.

Copyright 2005 by the Russian Journal of Earth Sciences

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