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GEOREF RECORD

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 and A. E. Izokh
Geochemical features and geodynamic setting of formation of the Lukinda dunite-troctolite-gabbro massif (southeastern framing of the Siberian Platform)
Russian Geology and Geophysics (July 2012) 53 (7): 636-648

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 (super 40) Ar/ (super 39) Ar dating of the massif plagioclase yielded an Early Permian age (285 + or - 7.5 Ma). The main specific petrochemical features of the intrusion rocks during their crystallization differentiation are an increase in SiO (sub 2) and CaO contents and a decrease in FeO (sub tot) content, with TiO (sub 2) 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.


ISSN: 1068-7971
Serial Title: Russian Geology and Geophysics
Serial Volume: 53
Serial Issue: 7
Title: Geochemical features and geodynamic setting of formation of the Lukinda dunite-troctolite-gabbro massif (southeastern framing of the Siberian Platform)
Affiliation: Russian Academy of Sciences, Institute of Geology and Nature Management, Blagoveshchensk, Russian Federation
Pages: 636-648
Published: 201207
Text Language: English
Publisher: Allerton Press, New York, NY, United States
References: 49
Accession Number: 2021-036917
Categories: Igneous and metamorphic petrologyGeochronologyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch maps
N54°00'00" - N57°00'00", E120°00'00" - E125°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2021
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