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Paleomagnetism of the Cretaceous rocks from Cape Kronotskiy, East Kamchatka and reconstruction of terrane trajectories in the NE Pacific area

Harbert, W and Tsukanov, NV and Alexeiev, DV and Gaedicke, C and Freitag, R and Baranov, BV and Skolotnev, SG and Kramer, W and Seifert, W (2009) Paleomagnetism of the Cretaceous rocks from Cape Kronotskiy, East Kamchatka and reconstruction of terrane trajectories in the NE Pacific area. Stephan Mueller Special Publication Series, 4. 313 - 327.

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Abstract

<jats:p>Abstract. 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. </jats:p>


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Harbert, Wharbert@pitt.eduHARBERT
Tsukanov, NV
Alexeiev, DV
Gaedicke, C
Freitag, R
Baranov, BV
Skolotnev, SG
Kramer, W
Seifert, W
Date: 17 September 2009
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: Stephan Mueller Special Publication Series
Volume: 4
Publisher: Copernicus GmbH
Page Range: 313 - 327
DOI or Unique Handle: 10.5194/smsps-4-313-2009
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Geology and Planetary Science
Refereed: Yes
Date Deposited: 25 Aug 2012 14:17
Last Modified: 04 Aug 2020 22:55
URI: http://d-scholarship.pitt.edu/id/eprint/13717

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