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.
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 |
| 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 |
| Google Analytic Metrics | Metrics page |