| Autor: |
Scherbakova, V., Zhidkov, G., Latyshev, A., Scherbakov, V. |
| Předmět: |
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| Zdroj: |
Izvestiya, Physics of the Solid Earth; Jul2013, Vol. 49 Issue 4, p488-504, 17p |
| Abstrakt: |
The results of determining the paleointensity of the Siberian traps sampled from the Kotui sequence, Truba ravine, Onkuchak Suite, and dated to Permian-Triassic are presented. Most of the H values for separate lava flows are significantly lower than the values of the present geomagnetic field at the observation point (approximately 50 μT). This is consistent with the known conclusion that the intensity of the geomagnetic field at the Permian-Triassic boundary was lower by a factor of two to three lower than its present value. We carried out the comparative analysis of the behavior of H and VDM for two trap sequences (Kotui (the Onkuchak Suite) and Norilsk) from the standpoint of the eruptive pulse hypothesis. In both sections, the average VDM values and their dispersion are similar. For comparison, similar analysis of the VDM behavior is conducted for the Brunhes epoch and Miocene in the interval of 5-10 Ma. It is hypothesized that during the three considered periods, namely, the eruption of the Siberian traps, in the Brunhes epoch, and in Miocene (in the interval of 5-10 Ma), the time behavior of the geomagnetic field was close to a stationary stochastic process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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