The Ordovician Gabbro–Tonalite–Trondhjemite Complex and Associated Volcanic Rocks in the Paleozoic Suture between the Urals and Kazakhstan

This paper reports new data on the Early Ordovician age established for granitoids of the gabbro—tonalite–trondhjemite complex in the Denisovka ophiolite zone (suture) on the boundary between the Paleozoic structures (Paleozoides) of the Urals and Kazakhstan. The ages of 482.6 ± 3.6 Ma and 486.2 ± 6...

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Bibliographic Details
Published in:Doklady earth sciences 2019-03, Vol.485 (1), p.242-246
Main Author: Ryazantsev, A. V.
Format: Article
Language:English
Subjects:
Basalt
Earth and Environmental Science
Earth Sciences
Gabbro
Geology
Ordovician
Paleozoic
Rhyolites
Rocks
Subduction
Volcanic activity
Volcanic rocks
Volcanoes
Zircon
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Summary:This paper reports new data on the Early Ordovician age established for granitoids of the gabbro—tonalite–trondhjemite complex in the Denisovka ophiolite zone (suture) on the boundary between the Paleozoic structures (Paleozoides) of the Urals and Kazakhstan. The ages of 482.6 ± 3.6 Ma and 486.2 ± 6.7 Ma were established by the U/Pb method (SHRIMP II) on the age data for zircon extracted from granitoids. The plutonic complex associates with the Early–Middle Ordovician effusive complex, composed of a series of rocks differentiated from basalts to rhyolites. The volcano-plutonic association was formed in the supra-subduction settings, as is evidenced by the composition of the rocks.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X19030152