Paleomagnetism of the Siberian flood basalts of the Noril'sk area: A constraint on eruption duration
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Abstract
The volcanic sequence of the Noril'sk area, northern Siberia, provides the most complete section of early Siberian flood-basalt volcanism. Paleomagnetic measurements for more than 4000 samples of lava and tuff indicate that nearly all of this >3500-m-thick sequence was laid down during one interval of normal magnetic polarity. Lavas of the lower third of this sequence are cut by the ore-bearing Noril'sk-I intrusion, which has an age of 251 Ma, identical to that of the Permian-Triassic boundary. Thus, the normal-polarity interval represented by this sequence is inferred to be the first of the Triassic Period. Eruption of this enormous volume of material in a relatively brief period coincident with the earth's greatest mass extinction requires that all aspects of Siberian flood-basalt volcanism be evaluated carefully as possibly contributing to that catastrophe.
Suggested Citation
Lind, E.N., Kropotov, S.V., Czamanske, G., Gromme, S., Fedorenko, V., 1994, Paleomagnetism of the Siberian flood basalts of the Noril'sk area: A constraint on eruption duration: International Geology Review, v. 36, no. 12, p. 1139-1150, https://doi.org/10.1080/00206819409465508.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Paleomagnetism of the Siberian flood basalts of the Noril'sk area: A constraint on eruption duration |
| Series title | International Geology Review |
| DOI | 10.1080/00206819409465508 |
| Volume | 36 |
| Issue | 12 |
| Publication Date | July 06, 2010 |
| Year Published | 1994 |
| Language | English |
| Publisher | Taylor & Francis |
| Description | 12 p. |
| First page | 1139 |
| Last page | 1150 |
| Country | Russia |
| Other Geospatial | Noril'sk Area, Siberia |