NDLI: Geochemistry, origin, and nature of metamorphic rocks of the Batomga granite-greenstone terrane (Aldan Shield)

Content Provider	Springer Nature Link
Author	Vovna, G. M. Mishkin, M. A. Lennikov, A. M. Oktyabrsky, R. A. Polin, V. F. Badrediv, Z. G. Yasnygina, T. A.
Copyright Year	2014
Abstract	Two series of volcanic rocks with different petrochemical affinities-calc-alkaline and komatiitetholeiitic series-were identified as protoliths for the Early Proterozoic metamorphic rocks of the Batomga granite-greenstone terrane. The metavolcanic rocks of the calc-alkaline series comprise metabasalts, metaandesites, metadacites, and metarhyolites. The distribution of the trace element abundances in the felsic metavolcanic rocks is similar to that of the Archean grey gneisses from the platform basements, thus suggesting a similar petrological mechanism for the formation of their protoliths.The protoliths for the komatiite-tholeiitic metavolcanic rocks include komatiite and tholeiite basalts. The chemical behavior of the tholeiites tends to support the fractionation of primary high-Mg basaltic magmas in a transient magma chamber at low pressures. The variations in the Nb, Y, and Zr contents of the metatoleiites indicate the derivation of their parental magmas from a plume-related source.
Starting Page	56
Ending Page	64
Page Count	9
File Format	PDF
ISSN	18197140
Journal	Russian Journal of Pacific Geology
Volume Number	8
Issue Number	1
e-ISSN	18197159
Language	English
Publisher	Springer US
Publisher Date	2014-02-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	granite-greenstone terrane geochemistry metabasalts meta-andesites metadacites metarhyolites Aldan shield Geology
Content Type	Text
Resource Type	Article
Subject	Geology Geophysics Geochemistry and Petrology Oceanography Paleontology Stratigraphy

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