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Article

Petrographical and Mineralogical Characteristics of Magmatic Rocks in the Northwestern Siberian Traps Province, Kulyumber River Valley. Part I: Rocks of the Khalil and Kaya Sites

1
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygin st. 19, 119991 Moscow, Russia
2
A.P. Karpinsky Russian Geological Research Institute, Sredny Prospect, 74, 199106 St. Petersburg, Russia
3
Institute Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Staromonetny per., 35, 119109 Moscow, Russia
4
Mining Institute of the Ural Branch of the Russian Academy of Sciences, 78a Sibirskaya St, 614007 Perm, Russia
5
Norilskgeology Ltd., Grazhdansky pr., 11, 195220 St. Petersburg, Russia
6
Zavaritsky Institute of Geology and Geochemistry of the Ural Branch of the Russian Academy of Sciences, Akademika Vonsovskogo Str., 15, 620016 Ekaterinburg, Russia
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(5), 409; https://doi.org/10.3390/min10050409
Received: 12 March 2020 / Revised: 19 April 2020 / Accepted: 20 April 2020 / Published: 30 April 2020
The origin of the Siberian Traps province has been under discussion for the last three decades. Up to now, there is no real model of its formation in a good agreement with geological data on the magmatic evolution at P–T boundary in Eastern Siberia. Modern geochemical data on magmatic rocks around the province is a key to reconstructing magmatic development in time and space. Such data have been obtained for the Norilsk and Meimecha–Kotuy and not for other parts of the Siberian province. For the first time, we studied the geochemistry and mineralogy of magmatic rocks at the Kulyumber river valley, located in the intersection of the Tunguska syneclise and Norilsk–Igarka zone in the NW Siberian platform. In this article, we present data from the Khalil and Kaya sites of this area belonging to the Syverminsky, Gudchikhinsky, Khakanchansky and Nadezhdinsky formations. Their mineralogical and geochemical features (including Sr, Nd and Pb isotope data) are similar to the same formations in the Norilsk area, while the rocks belonging to the Gudchikhinsky formation show differences. The Syverminsky tuffs are also described for the first time. The intrusive rocks are attributed to four intrusive complexes, i.e., Ergalakhsky, Kureysky, Katangsky and Norilsk. The Ergalakhsky complex comprises trachydolerites similar to the trachydolerites of the Norilsk area. The rocks of the Norilsk complex at the Khalil site differ from the rocks of the same complex at the Norilsk area by the (U/Nb)n = 1.8, (La/Yb)n = 2.1 in comparison with 3.7 and 2.3 of the rocks of the Norilsk 1 intrusion. The intrusions of the Kureysky complex are more differentiated than those of the Katangsky intrusions but show comparable TiO2 and trace elements distribution. Thus, the magmatism of the Kulyumber area is characterized by features matching those of the Tunguska syneclise and Norilsk area, i.e., suggesting rift and platform regimes. View Full-Text
Keywords: geochemistry; Siberian traps; intrusions; volcanic rocks; r. Kulyumber; Norilsk area geochemistry; Siberian traps; intrusions; volcanic rocks; r. Kulyumber; Norilsk area
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MDPI and ACS Style

Krivolutskaya, N.; Belyatsky, B.; Gongalsky, B.; Dolgal, A.; Lapkovsky, A.; Malitch, K.; Taskaev, V.; Svirskaya, N. Petrographical and Mineralogical Characteristics of Magmatic Rocks in the Northwestern Siberian Traps Province, Kulyumber River Valley. Part I: Rocks of the Khalil and Kaya Sites. Minerals 2020, 10, 409. https://doi.org/10.3390/min10050409

AMA Style

Krivolutskaya N, Belyatsky B, Gongalsky B, Dolgal A, Lapkovsky A, Malitch K, Taskaev V, Svirskaya N. Petrographical and Mineralogical Characteristics of Magmatic Rocks in the Northwestern Siberian Traps Province, Kulyumber River Valley. Part I: Rocks of the Khalil and Kaya Sites. Minerals. 2020; 10(5):409. https://doi.org/10.3390/min10050409

Chicago/Turabian Style

Krivolutskaya, Nadezhda, Boris Belyatsky, Bronislav Gongalsky, Alexander Dolgal, Andrey Lapkovsky, Kreshimir Malitch, Vladimir Taskaev, and Natalya Svirskaya. 2020. "Petrographical and Mineralogical Characteristics of Magmatic Rocks in the Northwestern Siberian Traps Province, Kulyumber River Valley. Part I: Rocks of the Khalil and Kaya Sites" Minerals 10, no. 5: 409. https://doi.org/10.3390/min10050409

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