Magnetic stratigraphy of the Permian-Triassic traps in the Kotui River valley (Siberian Platform): New paleomagnetic data

Fetisova, A. M.; Veselovskii, R. V.; Латышев, А. В.; Radko, Viktor A.; Павлов, В. Е.

doi:10.1134/s0869593814040054

Cited by 16 publications

(19 citation statements)

References 17 publications

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“…The volcanic rocks of the Siberian trap province were subdivided into different formations in different areas. We give the list of formations and their roughcorrelation based on data [31,54] in Table 1. Here, we discuss their characteristics successively from north to south in six studied locations shown in Figure 2b.…”

Section: Volcanic Rocks Of the Siberian Traps Provincementioning

confidence: 99%

“…The Maymecha-Kotuy area ("3" in Figure 2b) is well known as an alkaline-ultrabasic province comprising the alkaline Delkansky, Pravoboyarsky, and Arydzhangsky formations and the high-Mg rocks of the Maymechinsky formation. Rocks of normal alkalinity include the Onkuchaksky Formation, while the Tyvankitsky formation contains interlayered normal and subalkaline lavas (Table 1; [31,35,40,54]).…”

Section: Volcanic Rocks Of the Siberian Traps Provincementioning

confidence: 99%

“…It was shown that the Arydzhangsky (ar) and the Lower Onkuchaksky (onk) formations are normally magnetized, whereas the Upper Onkuchaksky formation [54] and the overlying Tyvankitsky (tv) and Lower Delkansky formations [85] have reversed polarity. Based on the comparison of the virtual geomagnetic poles of the volcanic units from the Noril'sk and Kotuy sections, some authors [54] proposed that the Arydzhangsky and lowermost Onkuchaksky formations correlate with the Morongovsky-Mokulaevsky level of the Noril'sk volcanic sequence. According to this scheme, the reversely magnetized uppermost Onkuchaksky and Tyvankitsky as well as the overlying formations of the Maymecha-Kotuy regions should be younger than the Noril'sk section.…”

Section: Volcanic Rocksmentioning

confidence: 99%

“…They include the maymechite (or meimechite, maimechite) of the Maymechinsky formation and the alkaline-ultramafic rocks of the Delkansky (trachyandeste), Pravoboyarsky (Figure 7c) and Arydzhangsky formations. All are localized along the Yenisei-Khatanga fault (YKhf in Figure 1b), which provides access to mantle magmas (based on geochemistry of rocks without Ta-Nb and Pb anomalies in their patterns and ε Nd ≥ +3) and was active during the entire period of trap emplacement: the Gudchikhinsky magmas intruded along it at an earlier stage and alkaline-ultramafic magmas intruded during the middle stage (Arydzhangsky formation) and the end (Delkansky and Maymechinsky formations) of magmatic evolution (according to their position in cross-section and paleomagnetic data [54]).…”

Section: Volcanic Rocksmentioning

confidence: 99%

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Unique PGE–Cu–Ni Noril’sk Deposits, Siberian Trap Province: Magmatic and Tectonic Factors in Their Origin

et al. 2019

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The unique and very large PGE–Cu–Ni Noril’sk deposits are located within the Siberian trap province, posing a number of questions about the relationship between the ore-forming process and the magmatism that produced the traps. A successful answer to these questions could greatly increase the possibility of discovering new deposits in flood basalt provinces elsewhere. In this contribution, we present new data on volcanic stratigraphy and geochemistry of the magmatic rocks in the key regions of the Siberian trap province (Noril’sk, Taimyr, Maymecha-Kotuy, Kulyumber, Lower Tunguska and Angara) and analyze the structure of the north part of the province. The magmatic rocks of the Arctic zone are characterized by variable MgO (3.6–37.2 wt %) and TiO2 (0.8–3.9 wt %) contents, Gd/Yb (1.4–6.3) and La/Sm (2.0–10.4) ratios, and a large range of isotopic compositions. The intrusions in the center of the Tunguska syneclise and Angara syncline have much less variable compositions and correspond to a “typical trap” with MgO of 5.6–7.2 wt %, TiO2 of 1.0–1.6 wt %, Gd/Yb ratio of 1.4–1.6 and La/Sm ratio of 2.0–3.5. This compositional diversity of magmas in the Arctic zone is consistent with their emplacement within the paleo-rift zones. Ore-bearing intrusions (the Noril’sk 1, Talnakh, Kharaelakh) are deep-situated in the Igarka-Noril’sk rift zone, which has three branches, namely the Bolsheavamsky, Dyupkunsky, and Lower Tunguska, that are prospected for discovering new deposits. One possible explanation for the specific position of the PGE–Cu–Ni deposits is accumulation of sulfides in these long-lived zones from the Neoproterozoic to the Mesozoic era during magmatic and metamorphic processes. Thus, trap magmatism, itself, does not produce large deposits, but mobilizes earlier formed sulfide segregations in addition carrying metals in the original magmas. These deposits are the results of several successive magmatic events, in which emplacement of the traps was the final event.

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Section: Volcanic Rocks Of the Siberian Traps Provincementioning

confidence: 99%

Section: Volcanic Rocks Of the Siberian Traps Provincementioning

confidence: 99%

Section: Volcanic Rocksmentioning

confidence: 99%

Section: Volcanic Rocksmentioning

confidence: 99%

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Unique PGE–Cu–Ni Noril’sk Deposits, Siberian Trap Province: Magmatic and Tectonic Factors in Their Origin

et al. 2019

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“…For its design, the most important are the volcanic rocks of two regions -Norilsk and Maimecha-Kotuy, the relationship between which is not completely clear and is being actively discussed. It is assumed that all the rocks of the latter of these sections were formed after the volcanic rocks of the Norilsk region, or began to form at the same time, partially overlapped with them, and finished forming much later [1].…”

Section: Introductionmentioning

confidence: 99%

Composition, structure and formation conditions of the Arydzhangsky Formation of the Maimecha-Kotuy District of the Siberian Trap Province

Shtokalo

Krivolutskaya

Конышев

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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We studied 6 sections of the Arydzhangsky lava formation (P2-T1) in the Kotuy river valley. The results of petrographic and geochemical studies of the composition of rocks of the Arydzhangsky, Khardaksky and Pravoboyarsky formations are presented. The stratigraphic columns of the sections were built and the composition of the rocks was additionally determined using a scanning electron microscope. In this regard, the relative position of these formations was established, the mantle and crust sources of magmas were confirmed. A geochemical identity of the rocks of the Khardaksky formation with the rocks of the Arydzhangsky formation was established, which suggests a similar age of their formation.

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Volatile concentrations in olivine-hosted melt inclusions from meimechite and melanephelinite lavas of the Siberian Traps Large Igneous Province: Evidence for flux-related high-Ti, high-Mg magmatism

et al. 2018

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Magnetic stratigraphy of the Permian-Triassic traps in the Kotui River valley (Siberian Platform): New paleomagnetic data

Cited by 16 publications

References 17 publications

Unique PGE–Cu–Ni Noril’sk Deposits, Siberian Trap Province: Magmatic and Tectonic Factors in Their Origin

Unique PGE–Cu–Ni Noril’sk Deposits, Siberian Trap Province: Magmatic and Tectonic Factors in Their Origin

Composition, structure and formation conditions of the Arydzhangsky Formation of the Maimecha-Kotuy District of the Siberian Trap Province

Volatile concentrations in olivine-hosted melt inclusions from meimechite and melanephelinite lavas of the Siberian Traps Large Igneous Province: Evidence for flux-related high-Ti, high-Mg magmatism

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