An example of multicomponent magnetization in welded tuffs: A case study of Upper Cretaceous welded tuffs of eastern Russia

Koji Uno, Yo Ichiro Otofuji, Takaaki Matsuda, Kuniyuki Furukawa, Toshiaki Mishima, Yoshiki Kuniko, Ryo Enami, Ruslan G. Kulinich, Petr S. Zimin, Anatoly P. Matunin, Vladimir G. Sakhno

Research output: Contribution to journalArticle

Abstract

Four distinct components of natural remanent magnetization were isolated from a single site in welded tuffs in the Upper Cretaceous Kisin Group of the Sikhote Alin mountain range, Russia. In order to contribute toward a basis for an interpretation of multicomponent magnetization, rock magnetic experiments were performed on the welded tuffs. All four magnetization components essentially reside in magnetite. The lowest-temperature component up to 300 °C (component A: D = 349:3°, I = 60:9°, α95 = 7.3°, N = 7) is a present day viscous magnetization. The third-removed component (component C: D = 41.4°, I = 51.8°, α95 = 3.5°, N = 8), isolated over the temperature range of 450-560 °C, is a primary remanence. The second- and fourth-demagnetized components (component B: D = 174:7°, I = -53.1°, α95 = 21.2°, N = 3 and component D: D = 188.1°, I = -64.5°, α95 = 4.0°, N = 8. respectively) are secondary magnetizations related to a thermal event in Sikhote Alin between 66 and 51 Ma. Components B and D were acquired through different remagnetization processes. Component B is ascribed to a thermoviscous remanent magnetization carried by single-domain magnetite, and component D is a chemical remanent magnetization.

Original languageEnglish
Pages (from-to)431-439
Number of pages9
JournalJournal of Asian Earth Sciences
Volume21
Issue number4
DOIs
Publication statusPublished - Jan 2003
Externally publishedYes

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Keywords

  • Cretaceous
  • Remanent magnetization
  • Russia

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Geology

Cite this

Uno, K., Otofuji, Y. I., Matsuda, T., Furukawa, K., Mishima, T., Kuniko, Y., Enami, R., Kulinich, R. G., Zimin, P. S., Matunin, A. P., & Sakhno, V. G. (2003). An example of multicomponent magnetization in welded tuffs: A case study of Upper Cretaceous welded tuffs of eastern Russia. Journal of Asian Earth Sciences, 21(4), 431-439. https://doi.org/10.1016/S1367-9120(02)00067-6