Geomagnetic Secular Variations at the Permian-Triassic Boundary and Pulsed Magmatism During Eruption of the Siberian Traps

Vladimir E. Pavlov, Frederic Fluteau, Anton V. Latyshev, Anna M. Fetisova, Linda Elkins-Tanton, Ben A. Black, Seth D. Burgess, Roman V. Veselovskiy

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The tempo of Large Igneous Province emplacement is crucial to determining the environmental consequences of magmatism on the Earth. Based on detailed flow-by-flow paleomagnetic data from the most representative Permian-Triassic Siberian Traps lava stratigraphy of the northern Siberian platform, we present new constraints on the rate and duration of the volcanic activity in the Norilsk and Maymecha-Kotuy regions. Our data indicate that volcanic activity there occurred during a limited number of short volcanic pulses, each consisting of multiple individual eruptions, and that the total duration of discrete eruption pulses did not exceed ~10,000 years (hiatuses are not included). Our study confirms the occurrence of a thick interval in the lower part of the Norilsk lava sections, which contains a record of geomagnetic reversal and excursion. Based on combined evidence from paleomagnetic secular variation and typical timescales for such reversals, we conclude that the ~1-km-thick lava stratigraphy, corresponding to ~20,000 km 3 of basalt, of the Kharaelakh, Norilsk, and Imangda troughs was formed during a brief, but voluminous, eruptive period of several thousand years or less. Our data further suggest that the ore-bearing Norilsk-type intrusions are coeval or nearly coeval with the boundary between the Morongovsky and Mokulaevsky formations. We calculated a new Siberian Permian-Triassic paleomagnetic pole Norilsk-Maymecha-Kotuy (NMK): PLat = 52.9°, PLong = 147.1°, A95 = 4.3°, K = 23.2, and N = 49 lava flows. It is shown that geomagnetic field variations circa 252 Ma were similar to those observed in the latest Cenozoic.

Original languageEnglish (US)
Pages (from-to)773-791
Number of pages19
JournalGeochemistry, Geophysics, Geosystems
Volume20
Issue number2
DOIs
StatePublished - Feb 1 2019

Fingerprint

Permian-Triassic boundary
secular variations
Stratigraphy
secular variation
lava
volcanic eruptions
magmatism
Bearings (structural)
volcanic eruption
traps
volcanology
stratigraphy
Permian
Triassic
Ores
Poles
large igneous province
magnetic reversal
Earth (planet)
geomagnetic field

Keywords

  • directional groups
  • paleomagnetism
  • Permian-Triassic boundary
  • secular variations
  • Siberian Traps
  • volcanic pulses

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Geomagnetic Secular Variations at the Permian-Triassic Boundary and Pulsed Magmatism During Eruption of the Siberian Traps. / Pavlov, Vladimir E.; Fluteau, Frederic; Latyshev, Anton V.; Fetisova, Anna M.; Elkins-Tanton, Linda; Black, Ben A.; Burgess, Seth D.; Veselovskiy, Roman V.

In: Geochemistry, Geophysics, Geosystems, Vol. 20, No. 2, 01.02.2019, p. 773-791.

Research output: Contribution to journalArticle

Pavlov, Vladimir E. ; Fluteau, Frederic ; Latyshev, Anton V. ; Fetisova, Anna M. ; Elkins-Tanton, Linda ; Black, Ben A. ; Burgess, Seth D. ; Veselovskiy, Roman V. / Geomagnetic Secular Variations at the Permian-Triassic Boundary and Pulsed Magmatism During Eruption of the Siberian Traps. In: Geochemistry, Geophysics, Geosystems. 2019 ; Vol. 20, No. 2. pp. 773-791.
@article{9bb1e04806774893a3352965391b8a67,
title = "Geomagnetic Secular Variations at the Permian-Triassic Boundary and Pulsed Magmatism During Eruption of the Siberian Traps",
abstract = "The tempo of Large Igneous Province emplacement is crucial to determining the environmental consequences of magmatism on the Earth. Based on detailed flow-by-flow paleomagnetic data from the most representative Permian-Triassic Siberian Traps lava stratigraphy of the northern Siberian platform, we present new constraints on the rate and duration of the volcanic activity in the Norilsk and Maymecha-Kotuy regions. Our data indicate that volcanic activity there occurred during a limited number of short volcanic pulses, each consisting of multiple individual eruptions, and that the total duration of discrete eruption pulses did not exceed ~10,000 years (hiatuses are not included). Our study confirms the occurrence of a thick interval in the lower part of the Norilsk lava sections, which contains a record of geomagnetic reversal and excursion. Based on combined evidence from paleomagnetic secular variation and typical timescales for such reversals, we conclude that the ~1-km-thick lava stratigraphy, corresponding to ~20,000 km 3 of basalt, of the Kharaelakh, Norilsk, and Imangda troughs was formed during a brief, but voluminous, eruptive period of several thousand years or less. Our data further suggest that the ore-bearing Norilsk-type intrusions are coeval or nearly coeval with the boundary between the Morongovsky and Mokulaevsky formations. We calculated a new Siberian Permian-Triassic paleomagnetic pole Norilsk-Maymecha-Kotuy (NMK): PLat = 52.9°, PLong = 147.1°, A95 = 4.3°, K = 23.2, and N = 49 lava flows. It is shown that geomagnetic field variations circa 252 Ma were similar to those observed in the latest Cenozoic.",
keywords = "directional groups, paleomagnetism, Permian-Triassic boundary, secular variations, Siberian Traps, volcanic pulses",
author = "Pavlov, {Vladimir E.} and Frederic Fluteau and Latyshev, {Anton V.} and Fetisova, {Anna M.} and Linda Elkins-Tanton and Black, {Ben A.} and Burgess, {Seth D.} and Veselovskiy, {Roman V.}",
year = "2019",
month = "2",
day = "1",
doi = "10.1029/2018GC007950",
language = "English (US)",
volume = "20",
pages = "773--791",
journal = "Geochemistry, Geophysics, Geosystems",
issn = "1525-2027",
publisher = "American Geophysical Union",
number = "2",

}

TY - JOUR

T1 - Geomagnetic Secular Variations at the Permian-Triassic Boundary and Pulsed Magmatism During Eruption of the Siberian Traps

AU - Pavlov, Vladimir E.

AU - Fluteau, Frederic

AU - Latyshev, Anton V.

AU - Fetisova, Anna M.

AU - Elkins-Tanton, Linda

AU - Black, Ben A.

AU - Burgess, Seth D.

AU - Veselovskiy, Roman V.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - The tempo of Large Igneous Province emplacement is crucial to determining the environmental consequences of magmatism on the Earth. Based on detailed flow-by-flow paleomagnetic data from the most representative Permian-Triassic Siberian Traps lava stratigraphy of the northern Siberian platform, we present new constraints on the rate and duration of the volcanic activity in the Norilsk and Maymecha-Kotuy regions. Our data indicate that volcanic activity there occurred during a limited number of short volcanic pulses, each consisting of multiple individual eruptions, and that the total duration of discrete eruption pulses did not exceed ~10,000 years (hiatuses are not included). Our study confirms the occurrence of a thick interval in the lower part of the Norilsk lava sections, which contains a record of geomagnetic reversal and excursion. Based on combined evidence from paleomagnetic secular variation and typical timescales for such reversals, we conclude that the ~1-km-thick lava stratigraphy, corresponding to ~20,000 km 3 of basalt, of the Kharaelakh, Norilsk, and Imangda troughs was formed during a brief, but voluminous, eruptive period of several thousand years or less. Our data further suggest that the ore-bearing Norilsk-type intrusions are coeval or nearly coeval with the boundary between the Morongovsky and Mokulaevsky formations. We calculated a new Siberian Permian-Triassic paleomagnetic pole Norilsk-Maymecha-Kotuy (NMK): PLat = 52.9°, PLong = 147.1°, A95 = 4.3°, K = 23.2, and N = 49 lava flows. It is shown that geomagnetic field variations circa 252 Ma were similar to those observed in the latest Cenozoic.

AB - The tempo of Large Igneous Province emplacement is crucial to determining the environmental consequences of magmatism on the Earth. Based on detailed flow-by-flow paleomagnetic data from the most representative Permian-Triassic Siberian Traps lava stratigraphy of the northern Siberian platform, we present new constraints on the rate and duration of the volcanic activity in the Norilsk and Maymecha-Kotuy regions. Our data indicate that volcanic activity there occurred during a limited number of short volcanic pulses, each consisting of multiple individual eruptions, and that the total duration of discrete eruption pulses did not exceed ~10,000 years (hiatuses are not included). Our study confirms the occurrence of a thick interval in the lower part of the Norilsk lava sections, which contains a record of geomagnetic reversal and excursion. Based on combined evidence from paleomagnetic secular variation and typical timescales for such reversals, we conclude that the ~1-km-thick lava stratigraphy, corresponding to ~20,000 km 3 of basalt, of the Kharaelakh, Norilsk, and Imangda troughs was formed during a brief, but voluminous, eruptive period of several thousand years or less. Our data further suggest that the ore-bearing Norilsk-type intrusions are coeval or nearly coeval with the boundary between the Morongovsky and Mokulaevsky formations. We calculated a new Siberian Permian-Triassic paleomagnetic pole Norilsk-Maymecha-Kotuy (NMK): PLat = 52.9°, PLong = 147.1°, A95 = 4.3°, K = 23.2, and N = 49 lava flows. It is shown that geomagnetic field variations circa 252 Ma were similar to those observed in the latest Cenozoic.

KW - directional groups

KW - paleomagnetism

KW - Permian-Triassic boundary

KW - secular variations

KW - Siberian Traps

KW - volcanic pulses

UR - http://www.scopus.com/inward/record.url?scp=85061044890&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061044890&partnerID=8YFLogxK

U2 - 10.1029/2018GC007950

DO - 10.1029/2018GC007950

M3 - Article

AN - SCOPUS:85061044890

VL - 20

SP - 773

EP - 791

JO - Geochemistry, Geophysics, Geosystems

JF - Geochemistry, Geophysics, Geosystems

SN - 1525-2027

IS - 2

ER -