Internal deformation of Sikhote Alin volcanic belt, far eastern Russia: Paleocene paleomagnetic results

Yo Ichiro Otofuji, Takaaki Matsuda, Ryo Enami, Koji Uno, Katsuhiko Nishihama, Li Su, Ruslan G. Kulinich, Petr S. Zimin, Anatoly P. Matunin, Vladimir G. Sakhno

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We present paleomagnetic results of Paleocene welded tuffs of the 53-50 Ma Bogopol Group from the northern region (46°N, 137°E) of the Sikhote Alin volcanic belt. Characteristic paleomagnetic directions with high unblocking temperature components above 560 °C were isolated from all the sites. A tilt-corrected mean paleomagnetic direction from the northern region is D = 345.8°, I = 49.9°, α95 = 14.6° (N = 9). The reliability of the magnetization is ascertained through the presence of normal and reversed polarities. The mean paleomagnetic direction from the northern region of the Sikhote Alin volcanic belt reflects a counterclockwise rotation of 29° from the Paleocene mean paleomagnetic direction expected from its southern region. The counterclockwise rotation of 25° is suggested from the paleomagnetic data of the Kisin Group that underlies the Bogopol Group. These results establish that internal tectonic deformation occurred within the Sikhote Alin volcanic belt over the past 50 Ma. The northern region from 44.6° to 46.0°N in the Sikhote Alin volcanic belt was subjected to counterclockwise rotational motion through 29 ± 17° with respect to the southern region. The tectonic rotation of the northern region is ascribable to relative motion between the Zhuravlevka terrane and the Olginsk-Taukhinsk terranes that compose the basements of the Sikhote Alin volcanic belt.

Original languageEnglish
Pages (from-to)181-192
Number of pages12
JournalTectonophysics
Volume350
Issue number3
DOIs
Publication statusPublished - Jul 15 2002
Externally publishedYes

    Fingerprint

Keywords

  • Cenozoic
  • Paleomagnetism
  • Rotation
  • Sikhote Alin
  • Tectonics

ASJC Scopus subject areas

  • Geophysics
  • Earth-Surface Processes

Cite this

Otofuji, Y. I., Matsuda, T., Enami, R., Uno, K., Nishihama, K., Su, L., Kulinich, R. G., Zimin, P. S., Matunin, A. P., & Sakhno, V. G. (2002). Internal deformation of Sikhote Alin volcanic belt, far eastern Russia: Paleocene paleomagnetic results. Tectonophysics, 350(3), 181-192. https://doi.org/10.1016/S0040-1951(02)00083-5