New Data on the Age of the Tonalite–Trondhjemite Orthogneisses of the Olekma Complex of the Central Part of the Chara–Olekma Geoblock, Aldan Shield

E. V. Tolmacheva; I. V. Anisimova; Yu. V. Plotkina; S. D. Velikoslavinskii; A. B. Kotov; E. B. Sal’nikova; A. B. Kuznetsov; V. P. Kovach; N. V. Popov

doi:10.1134/S1028334X18100203

New Data on the Age of the Tonalite–Trondhjemite Orthogneisses of the Olekma Complex of the Central Part of the Chara–Olekma Geoblock, Aldan Shield

Authors: Tolmacheva E.V.¹, Anisimova I.V.¹, Plotkina Y.V.¹, Velikoslavinskii S.D.¹, Kotov A.B.¹, Sal’nikova E.B.¹, Kuznetsov A.B.¹, Kovach V.P.¹, Popov N.V.²
Affiliations:
1. Institute of Precambrian Geology and Geochronology
2. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch
Issue: Vol 482, No 2 (2018)
Pages: 1265-1269
Section: Geology
URL: https://ogarev-online.ru/1028-334X/article/view/194135
DOI: https://doi.org/10.1134/S1028334X18100203
ID: 194135

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Abstract

New U–Pb zircon (TIMS) results allow dating of protoliths of tonalite–trondhjemite orthogneisses of the Olekma Complex in the central part of the Chara–Olekma Geoblock (Aldan Shield) to 2825 ± 3 Ma and 2994 ± 3 Ma. Together with the results of previous geochronological studies, this proves that the Olekma Complex comprises heterochronous igneous rocks intensively reworked under amphibolite facies conditions and formed during different stages of geological evolution of the Aldan Shield.