Age of the Early Precambrian (?) Intrusive Complexes of the Northern Bureya Continental Massif, Central Asian Fold Belt

Russian Journal of Pacific Geology - Tập 12 - Trang 289-302 - 2018
R. O. Ovchinnikov1, A. A. Sorokin1, N. M. Kudryashov2
1Institute of Geology and Nature Management, Far East Branch, Russian Academy of Sciences, Blagoveshchensk, Russia
2Institute of Geology, Kola Science Center, Russian Academy of Sciences, Apatity, Russia

Tóm tắt

It is established that the igneous rocks of the northern Bureya continental massif, which are ascribed to the Amur, Drevnyaya Bureya, and Nyatygran complexes, are Late Paleozoic and Early Mesozoic in age, not early Precambrian as previously assumed. The ages obtained correspond to two stages of magmatic activity: ~264 and ~194 Ma. These stages are clearly manifested in the other continental massifs of the Central Asian Fold Belt, which suggest the common tectonic origin of the magmatic activity. All of the studied igneous rocks ascribed to the Amur, Drevnyaya Bureya, and Nyatygran complexes, despite their Late Paleozoic and Mesozoic ages, bear traces of structural–metamorphic transformations.

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