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| Titel |
Paleomagnetism of the Cretaceous rocks from Cape Kronotskiy, East Kamchatka and reconstruction of terrane trajectories in the NE Pacific area |
| VerfasserIn |
W. Harbert, N. V. Tsukanov, D. V. Alexeiev, C. Gaedicke, R. Freitag, B. V. Baranov, S. G. Skolotnev, W. Kramer, W. Seifert |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1868-4556
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| Digitales Dokument |
URL |
| Erschienen |
In: Geology, geophysics and tectonics of Northeastern Russia: a tribute to Leonid Parfenov ; Nr. 4 (2009-09-17), S.313-327 |
| Datensatznummer |
250001454
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| Publikation (Nr.) |
 copernicus.org/smsps-4-313-2009.pdf |
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| Zusammenfassung |
| The Kamchatka Peninsula of northeastern Russia is located along the
northwestern margin of the Bering Sea and consists of zones of complexly
deformed accreted terranes. Paleomagnetic samples were collected for study
from a Late Cretaceous aged locality at Cape Kronotskiy
(λ=54°44.8´ N, φ=162°1.29´ E). Two
components of magnetization were observed. During stepwise thermal
demagnetization, the B-magnetic component was observed up to 600°C
having a direction and associated uncertainty in stratigraphic coordinates of
Ds=300.7°, Is=48.7°, α95=10.9°,
k-value=11.8, n=17. The B component paleolatitude calculated from the
Fisher mean in stratigraphic coordinates and associated statistics are
λobs=30.4° N or S, λ95=8.9°,
n=17 (sites), k-value=11. Our overall study paleolatitude result is
similar to a previously reported paleomagnetic study completed within this
unit. Terrane trajectories calculated using the finite rotation poles of
Engebretson et al. (1985), which are corrected for either Pacific-hotspot
drift or True Polar Wander hotspot-spin axis relative motion, show that the
sampled unit represents a far traveled tectonostratigraphic terrane and
support a model in which accretion (docking) events of this composite or
superterrane with the North America plate occur at approximately 40 Ma. |
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