Age of Overthrust-Type Granites in the Accretionary-Collisional System of the Early Caledonides (Western Baikal Region)

Mikheev E I<sup>*</sup>; Vladimirov A G; Fedorovsky V S; Bayanova T B; Mazukabzov A M; Travin A V; Volkova N I; Khromykh S V; Khlestov V V; Tishin P A

doi:10.1134/S1028334X17020167

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Age of Overthrust-Type Granites in the Accretionary-Collisional System of the Early Caledonides (Western Baikal Region)

作者：Mikheev E I^*; Vladimirov A G; Fedorovsky V S; Bayanova T B; Mazukabzov A M; Travin A V; Volkova N I; Khromykh S V; Khlestov V V; Tishin P A

来源：Doklady Earth Sciences, 2017, 472(2): 152-158.

DOI：10.1134/S1028334X17020167

摘要

The western Baikal region (Ol'khon region, Nutgei zone, Kharikta area) is characterized by the development of packets of thrust-type folds and synkinematic granites corresponding to the stage of thrust deformations (overthrust-type granites). Two stages in the formation of thrust-type folds separated by episodes of granite emplacement are definable. The data obtained make it possible to estimate both the time of transition from thrust to strike-slip deformations and the duration of accretionary. collisional events that resulted in regional strike-slip deformations, which terminated in the western Baikal region 460-455 Ma ago.