Siberian Traps in the Norilsk Area: A Corrected Scheme of Magmatism Evolution

World Multidisciplinary Earth Sciences Symposium 2016

Krivolutskaya, Nadezhda^1 ; Gongalsky, Bronislav^2 ; Dolgal, Alexander^3 ; Svirskaya, Natalia^1 ; Vekshina, Tamara^1

Vernadsky Institute of Geochemistry and Analytical Chemistry, 19 Kosygin St., Moscow

119991, Russia^1

Institute Geology of Ore Deposits Petrography, Mineralogy and Geochemistry, Staromonetny Per. 35, Moscow

117109, Russia^2

Perm State University, 15 Bukireva St., Perm

614990, Russia^3

关键词: Geochemical characteristic;    Magmatisms;    Rare elements;    Siberian platform;    Siberian Traps;    Space and time;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/44/4/042008/pdf
DOI  :  10.1088/1755-1315/44/4/042008

来源: IOP

【 摘 要 】

To understand the origin of the Siberian Traps it is necessary to know the evolution of magmatism in space and time inside the Siberian Platform. It was suggested that volcanic rocks were formed in three stages: rift (OIB), intermediate and trap (WPB). It was studied rocks of the Tuklonsky, Nadezhdinsky and Morongovsky suits in the western part of the Norilsk area and found that they have no intermediate geochemical characteristics (major components and rare elements, especially La/Sm ratios) between OIB and WPB. Therefore, there are only two main stages in the magmatism evolution as the actual trapping stage began from Tuklonsky time.