Geochemical features and geodynamic setting of formation of the Lukinda dunite–troctolite–gabbro massif (southeastern framing of the Siberian Platform)

I.V. Buchko; A.A. Sorokin; V.A. Ponomarchuk; A.E. Izokh

doi:10.1016/j.rgg.2012.05.002

I.V. Buchko;

I.V. Buchko

Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences, ul. B. Khmel’nitskogo 2, Blagoveshchensk, 675000, Russia

Corresponding author. E-mail address: inna@ascnet.ru (I.V. Buchko)

Search for other works by this author on:

GSW

Google Scholar

A.A. Sorokin;

A.A. Sorokin

Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences, ul. B. Khmel’nitskogo 2, Blagoveshchensk, 675000, Russia

Search for other works by this author on:

GSW

Google Scholar

V.A. Ponomarchuk;

V.A. Ponomarchuk

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia

Search for other works by this author on:

GSW

Google Scholar

A.E. Izokh

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia

Search for other works by this author on:

GSW

Google Scholar

Russ. Geol. Geophys. (2012) 53 (7): 636–648.

https://doi.org/10.1016/j.rgg.2012.05.002

Abstract

The Lukinda dunite–troctolite–gabbro massif in the Selenga–Stanovoy superterrane on the southeastern framing of the Siberian Platform was earlier considered Precambrian. The performed ⁴⁰Ar/³⁹Ar dating of the massif plagioclase yielded an Early Permian age (285 ± 7.5 Ma). The main specific petrochemical features of the intrusion rocks during their crystallization differentiation are an increase in SiO₂ and CaO contents and a decrease in FeO_tot content, with TiO₂ content remaining low and showing minor variations. A specific geochemical feature of the Lukinda massif ultrabasite–basites is a slight domination of LREE over HREE, with (La/Yb)_N = 1.0–8.2. The depletion of the massif rocks in LILE (except for Sr and Ba), REE, and HFSE suggests that the massif formed on an active continental margin.

You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Geochemical features and geodynamic setting of formation of the Lukinda dunite–troctolite–gabbro massif (southeastern framing of the Siberian Platform)

Abstract

Email alerts

Citing articles via

Geochemical features and geodynamic setting of formation of the Lukinda dunite–troctolite–gabbro massif (southeastern framing of the Siberian Platform)

Abstract

Email alerts

Citing articles via

This Feature Is Available To Subscribers Only