TY - JOUR
T1 - An example of multicomponent magnetization in welded tuffs
T2 - A case study of Upper Cretaceous welded tuffs of eastern Russia
AU - Uno, Koji
AU - Otofuji, Yo Ichiro
AU - Matsuda, Takaaki
AU - Furukawa, Kuniyuki
AU - Mishima, Toshiaki
AU - Kuniko, Yoshiki
AU - Enami, Ryo
AU - Kulinich, Ruslan G.
AU - Zimin, Petr S.
AU - Matunin, Anatoly P.
AU - Sakhno, Vladimir G.
N1 - Funding Information:
The logistics in this work were set up by the Pacific Oceanological Institute (POI), Russia. We express our gratitude to Dr V.M. Nikiforov, Dr Y. Pochkay and Dr M.V. Radchenko for helpful cooperation in the field. Dr G.M. Turner provided thoughtful reviews to improve the quality of this paper. We are grateful to Dr E. McClelland and Dr M. Bazhenov for valuable suggestions for improving the manuscript. This work has benefited from extensive discussions with Dr N. Ishikawa. We thank Dr M. Torii for his kind help to perform low temperature experiments. This work was supported in part by the Grants-in-aid (Nos. 08041110, 09440175) from the Japanese Ministry of Education, Science and Culture.
PY - 2003/1
Y1 - 2003/1
N2 - 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.
AB - 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.
KW - Cretaceous
KW - Remanent magnetization
KW - Russia
UR - http://www.scopus.com/inward/record.url?scp=0037277915&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037277915&partnerID=8YFLogxK
U2 - 10.1016/S1367-9120(02)00067-6
DO - 10.1016/S1367-9120(02)00067-6
M3 - Article
AN - SCOPUS:0037277915
VL - 21
SP - 431
EP - 439
JO - Journal of Asian Earth Sciences
JF - Journal of Asian Earth Sciences
SN - 1367-9120
IS - 4
ER -