Secular geomagnetic variations and volcanic pulses in the Permian-Triassic traps of the Norilsk and Maimecha-Kotui provinces

Павлов, В. Е.; Fluteau, Frédéric; Veselovskiy, R. V.; Fetisova, A. M.; Латышев, А. В.

doi:10.1134/s1069351311040070

Cited by 49 publications

(32 citation statements)

References 20 publications

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“…Based on 524 this, Siberian Trap eruptions may have increased global metal flux to the atmosphere from 9% 525 (Se) to 78% (Co) above modern natural background flux (Mather et al, 2013;Nriagu, 1989) 526 (Table 3). However, Siberian Trap magmatism was more likely episodic over the total eruption 527 interval (Pavlov et al, 2011). Such episodic eruption would mean that rather than an overall 528 average background increase, the extinction interval would be better characterized by pulses of 529 extreme metal loading, significantly higher than those estimated here.…”

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confidence: 51%

Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction

Grasby

Beauchamp

Bond

et al. 2015

Geological Society of America Bulletin

111

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25Stratigraphic records from northwestern Pangea provide unique insight into global processes 26 that occurred during the Latest Permian Extinction (LPE). We examined a detailed geochemical 27 record of the Festningen Section, Spitsbergen. A stepwise extinction is noted: 1) loss of 28 carbonate shelly macrofauna, 2) loss of siliceous sponges in conjunction with an abrupt change 29 in ichnofabrics as well as dramatic change in the terrestrial environment, and 3) final loss of all 30 trace fossils. We interpret loss of carbonate producers as related to higher latitude shoaling of 31 the lysocline in relationship to building atmospheric CO 2 in higher latitiudes The loss of siliceous 32 sponges is coincident the global LPE event and is related to onset of high loading rates of toxic 33 metals (Hg, As, Co) that we suggest are derived from Siberian Trap eruptions. The final 34 extinction stage is coincident with redox sensitive trace metal and other proxy data which 35 suggest onset of anoxia, after the other extinction events. These results show a remarkable 36 record of progressive environmental deterioration in NW Pangea during the extinction crises. 37

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contrasting

confidence: 51%

Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction

Grasby

Beauchamp

Bond

et al. 2015

Geological Society of America Bulletin

111

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“…Recent paleomagnetic studies of the Siberian Traps have focused on characterizing the magnetostratigraphy Pavlov et al, 2011;Veselovskiy et al, 2012), the implications of secular variation of the magnetic fi eld for eruption time scales (Pavlov et al, 2011), and geomagnetic fi eld paleointensities and the paleolatitude of Siberia (Veselovsky et al, 2003;Heunemann et al, 2004;Pavlov et al, 2007). Here, we use paleomagnetic studies to constrain emplacement temperatures of volcaniclastic rocks using techniques pioneered by Aramaki and Akimoto (1957) and Hoblitt and Kellogg (1979) as refi ned by Kent et al (1981).…”

Section: Methods and Geologic Backgroundmentioning

confidence: 99%

“…A1 1 ) is consistent with near-stoichiometric magnetite as the major NRM carrier. In addition to magnetite, K08-7.11 and NT12-4.2 both appear to host a mineral with a Curie temperature close to 300 °C, which is likely titanomagnetite (Kazansky et al, 2005;Pavlov et al, 2011). Curie temperatures of titano magnetite may depend on mineral composition and oxidation history (Dunlop and Özdemir, 2001).…”

Section: Paleomagnetismmentioning

confidence: 99%

Siberian Traps volcaniclastic rocks and the role of magma-water interactions

Black

Weiss

Elkins-Tanton

et al. 2015

Geological Society of America Bulletin

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The Siberian Traps are one of the largest known continental fl ood basalt provinces and may be causally related to the end-Permian mass extinction. In some areas, a large fraction of the Siberian Traps vol canic sequence consists of mafi c volcaniclastic rocks. Here, we synthesize paleomagnetic, petrographic, and fi eld data to assess the likely origins of these volcaniclastic rocks and their significance for the overall environmental impact of the eruptions. We argue that magmawater interactions, including both lava-water inter actions and phreatomagmatic explosions in vents, were important components of Siberian Traps magmatism. Phreatomagmatic episodes may have generated tall water-rich eruption columns, simultaneously promoting removal of highly soluble volcanic gases such as HCl and potentially delivering additional sulfur to the upper atmosphere.

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“…A key parameter in determining the environmental and biological consequences of the activity of LIPs is the eruption rate. For some flood basalts, such as the Deccan traps and the Siberian traps, pulses of large and rapid eruptions with volumes of thousands of km 3 and fluxes of ~100 km 3 /year are proposed, mainly on the basis of paleomagnetic analysis (Chenet et al 2008;Pavlov et al 2011;Courtillot and Fluteau 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Paleomagnetic secular variation (PSV) analysis has been employed to constrain the eruption frequency down to the millennium or century timescale, and to identify the eruption pulses in some LIPs (Makinen et al 1985;Riisager et al 2003;Knight et al 2004;Chenet et al 2008;Pavlov et al 2011;Courtillot and Fluteau 2014). The geomagnetic field exhibits secular variation, both in direction and intensity, in timescales of decades to a century.…”

Section: Introductionmentioning

confidence: 99%

Paleomagnetic directional groups and paleointensity from the flood basalt in the Tarim large igneous province: implications for eruption frequency

Usui

Tian

2017

Earth Planets Space

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We present paleomagnetic secular variation and paleointensity from the Early Permian Tarim large igneous province, NW China. The studied sections comprise a total of ~400 m of basaltic flows. Paleomagnetic directions were determined for 11 flows. Four successive flows with a cumulative thickness of ~150 m showed a statistically identical paleomagnetic direction. Assuming a paleosecular variation speed similar to that of the present day, the ~150-m-thick basalt was estimated to have erupted within the past few centuries. Paleointensity experiments were performed on both whole-rock and single plagioclase samples. Although alterations during the experiment and/or weak remanence degraded the data quality, the flows with the same paleomagnetic direction revealed similar paleointensity estimates, supporting the hypothesis that the eruption of these flows was rapid. More generally, flows from the Lower Kupukuziman Formation seem to record lower paleointensity compared to flows from the overlying Kaipaizileike Formation.

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Secular geomagnetic variations and volcanic pulses in the Permian-Triassic traps of the Norilsk and Maimecha-Kotui provinces

Cited by 49 publications

References 20 publications

Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction

Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction

Siberian Traps volcaniclastic rocks and the role of magma-water interactions

Paleomagnetic directional groups and paleointensity from the flood basalt in the Tarim large igneous province: implications for eruption frequency

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