Paleomagnetism of the Permian-Triassic intrusions from the Tunguska syncline and the Angara-Taseeva depression, Siberian Traps Large Igneous Province: Evidence of contrasting styles of magmatism

2018 ◽  
Vol 723 ◽  
pp. 41-55 ◽  
Author(s):  
A.V. Latyshev ◽  
R.V. Veselovskiy ◽  
A.V. Ivanov
Keyword(s):  
Large Igneous Province ◽  
Siberian Traps ◽  
Igneous 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

2018 ◽  
Vol 483 ◽  
pp. 442-462 ◽  
Author(s):  
Alexei V. Ivanov ◽  
Samuel B. Mukasa ◽  
Vadim S. Kamenetsky ◽  
Michael Ackerson ◽  
Elena I. Demonterova ◽  
...  
Keyword(s):  
Melt Inclusions ◽  
Large Igneous Province ◽  
Siberian Traps ◽  
Igneous Province

scholarly journals Toxic mercury pulses into late Permian terrestrial and marine environments

Geology ◽  
2020 ◽  
Vol 48 (8) ◽  
pp. 830-833 ◽  
Author(s):  
Stephen E. Grasby ◽  
Xiaojun Liu ◽  
Runsheng Yin ◽  
Richard E. Ernst ◽  
Zhuoheng Chen
Keyword(s):  
Trophic Levels ◽  
Large Igneous Province ◽  
Late Permian ◽  
Volcanic Emissions ◽  
Loading Rates ◽  
Siberian Traps ◽  
Igneous Province ◽  
Permian Extinction ◽  
Potential Impact ◽  
Normal Background

Abstract Large spikes in mercury (Hg) concentration are observed globally at the latest Permian extinction (LPE) horizon that are thought to be related to enhanced volcanic emissions of the Siberian Traps large igneous province (LIP). While forming an effective chemostratigraphic marker, it remains unclear whether such enhanced volcanic Hg emissions could have generated toxic conditions that contributed to extinction processes. To address this, we examined the nature of enhanced Hg emissions from the Siberian Traps LIP and the potential impact it may have had on global ecosystems during the LPE. Model results for a LIP eruption predict that pulses of Hg emissions to the atmosphere would have been orders of magnitude greater than normal background conditions. When deposited into world environments, this would have generated a series of toxic shocks, each lasting >1000 yr. Such repeated Hg loading events would have had severe impact across marine trophic levels, as well as been toxic to terrestrial plant and animal life. Such high Hg loading rates may help explain the co-occurrence of marine and terrestrial extinctions.

scholarly journals Nickel isotopes link Siberian Traps aerosol particles to the end-Permian mass extinction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Menghan Li ◽  
Stephen E. Grasby ◽  
Shui-Jiong Wang ◽  
Xiaolin Zhang ◽  
Laura E. Wasylenki ◽  
...  
Keyword(s):  
Mass Extinction ◽  
Aerosol Particles ◽  
Sedimentary Rocks ◽  
Large Igneous Province ◽  
Siberian Traps ◽  
The Past ◽  
Igneous Province ◽  
Nickel Isotopes ◽  
Extinction Event ◽  
Permian Mass Extinction

AbstractThe end-Permian mass extinction (EPME) was the most severe extinction event in the past 540 million years, and the Siberian Traps large igneous province (STLIP) is widely hypothesized to have been the primary trigger for the environmental catastrophe. The killing mechanisms depend critically on the nature of volatiles ejected during STLIP eruptions, initiating about 300 kyr before the extinction event, because the atmosphere is the primary interface between magmatism and extinction. Here we report Ni isotopes for Permian-Triassic sedimentary rocks from Arctic Canada. The δ60Ni data range from −1.09‰ to 0.35‰, and exhibit the lightest δ60Ni compositions ever reported for sedimentary rocks. Our results provide strong evidence for global dispersion and loading of Ni-rich aerosol particles into the Panthalassic Ocean. Our data demonstrate that environmental degradation had begun well before the extinction event and provide a link between global dispersion of Ni-rich aerosols, ocean chemistry changes, and the EPME.

Mercury fluxes record regional volcanism in the South China craton prior to the end-Permian mass extinction

Geology ◽  
2020 ◽  
Author(s):  
Jun Shen ◽  
Jiubin Chen ◽  
Thomas J. Algeo ◽  
Qinglai Feng ◽  
Jianxin Yu ◽  
...  
Keyword(s):  
South China ◽  
Mass Extinction ◽  
Large Igneous Province ◽  
Upper Permian ◽  
The South ◽  
Triassic Boundary ◽  
Siberian Traps ◽  
Igneous Province ◽  
South China Craton ◽  
Permian Mass Extinction

Enhanced regional subduction-related volcanism in the South China craton concurrent with Siberian Traps large igneous province magmatism was a likely contributor to major biotic and environmental stresses associated with the Permian-Triassic boundary (ca. 252 Ma) mass extinction. However, the timing, intensity, and duration of this regional volcanic activity remain uncertain. We analyzed mercury (Hg) concentrations in three widely separated marine sections in the South China craton (Shangsi, Ganxi, and Chaohu) as well as Hg isotopic compositions in one section (Shangsi) from the Upper Permian (Changhsingian) through the lowermost Triassic (Induan) in order to track volcanic inputs. Four mercury enrichment (ME) intervals, dating to the lowermost Changhsingian (ME1), mid–Clarkina changxingensis zone (ME2), upper C. changxingensis to lower C. yini zones (ME3), and latest Permian mass extinction (LPME) interval (ME4), were recognized on the basis of elevated Hg/total organic carbon ratios. These records provide evidence of strong volcanism in the Tethyan region starting ~2 m.y. before the LPME, whereas only the ME4 event is recorded in extra-Tethyan sections. Mercury isotopes support the inference that pre-LPME Hg peaks were related to regional subduction-related volcanism, and that Hg emissions at the LPME were the result of Siberian Traps large igneous province intrusions into organic-rich sediments. This study demonstrates the feasibility of distinguishing flood-basalt from subduction-related volcanic inputs on the basis of marine sedimentary Hg records.

scholarly journals Halogen Enrichment of Siberian Traps Magmas During Interaction With Evaporites

2021 ◽  
Vol 9 ◽  
Author(s):  
Svetlana Sibik ◽  
Marie Edmonds ◽  
Benoit Villemant ◽  
Henrik H. Svensen ◽  
Alexander G. Polozov ◽  
...  
Keyword(s):  
Stratospheric Ozone ◽  
Contact Metamorphism ◽  
Large Igneous Province ◽  
Basalt Magma ◽  
Triassic Boundary ◽  
Siberian Traps ◽  
Igneous Province ◽  
Host Rocks ◽  
Permian Triassic Boundary ◽  
Primary Magmas

Volatile emissions to the atmosphere associated with the Siberian Traps eruptions at the Permian-Triassic boundary were sourced from the outgassing of primary magmas and the sedimentary host rocks into which they were intruded. Halogens in volcanic gases may have played an important role in environmental degradation and in stratospheric ozone destruction. Here we investigate how halogens behave during the interaction between salts and basalt magma emplaced as sills and erupted as lava. We present whole-rock, trace, and halogen concentrations for a suite of samples from three locations in the Siberian Traps Large Igneous Province, including basalt lavas erupted, and dolerites intruded into both organic-bearing shales and evaporites. Dolerites are enriched in Cl, Br, and I; their enrichment in Cl is similar to MORB and OIB that have been inferred to have assimilated seawater. The dolerites exhibit halogen compositional systematics, which extend towards both evaporites and crustal brines. Furthermore, all analyzed samples show enrichment in Rb/Nb; with the dolerites also showing enrichment in Cl/K similar to MORB and OIB that have been inferred to have assimilated seawater. We infer that samples from all three locations have assimilated fluids derived from evaporites, which are components of crustal sedimentary rocks. We show that up to 89% of the chlorine in the dolerites may have been assimilated as a consequence of the contact metamorphism of evaporites. We show, by thermal modeling, that halogen transfer may occur via assimilation of a brine phase derived from heating evaporites. Halogen assimilation from subcropping evaporites may be pervasive in the Siberian Traps Large Igneous Province and is expected to have enhanced emissions of Cl and Br into the atmosphere from both intrusive and extrusive magmatism.

scholarly journals The timing and extent of the eruption of the Siberian Traps large igneous province: Implications for the end-Permian environmental crisis

2009 ◽  
Vol 277 (1-2) ◽  
pp. 9-20 ◽  
Author(s):  
Marc K. Reichow ◽  
M.S. Pringle ◽  
A.I. Al'Mukhamedov ◽  
M.B. Allen ◽  
V.L. Andreichev ◽  
...  
Keyword(s):  
Environmental Crisis ◽  
Large Igneous Province ◽  
Siberian Traps ◽  
Igneous Province
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