Strike-slip tectonics and subalkaline mafic magmatism in the Early Paleozoic collisional system of the western Baikal region

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• 作者：V.S. Fedorovsky ; E.V. Sklyarov ; A.E. Izokh ; A.B. Kotov ; A.V. Lavrenchuk ; A.M. Mazukabzov
• 关键词：strike-slip tectonics ; subalkaline mafic magmatism ; mingling ; Early Paleozoids ; western Baikal region
• 刊名：Russian Geology and Geophysics
• 出版年：2010
• 出版时间：May 2010
• 年：2010
• 卷：51
• 期：5
• 页码：534-547
• 全文大小：6076 K

文摘

We discuss strike-slip tectonics as the key agent in the formation of the Early Paleozoic (Caledonian) collisional system of the western Baikal region. This tectonic setting implies existence of local syncompressional extension, with the ensuing conditions for mantle drainage and magmatism. Lower-middle crust collisional complexes exposed in the Olkhon area of the western Baikal region provide a record of synmetamorphic subalkaline-mafic magmatism associated with the early synorogenic collapse of the Olkhon collisional system, a part of the Central Asian collisional-accretionary belt.