Secondary remanent magnetization carried by magnetite inclusions in silicates: a comparative study of unremagnetized and remagnetized granites

Magnetic carriers in remagnetized Cretaceous granitic rocks of northeast Japan were studied using paleomagnetism, rock magnetism, optical microscopy and scanning electron microscopy (SEM) by comparison with unremagnetized granitic rocks. The natural remanent magnetization (NRM) of the remagnetized r...

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Bibliographic Details
Published in:Earth and planetary science letters 2000-08, Vol.180 (3), p.271-285
Main Authors: Otofuji, Yo-ichiro, Uno, Koji, Higashi, Takahiro, Ichikawa, Tomomichi, Ueno, Tsuyoshi, Mishima, Toshiaki, Matsuda, Takaaki
Format: Article
Language:English
Subjects:
Honshu
inclusions
magnetite
natural remanent magnetism
paleomagnetism
remagnetization
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Summary:Magnetic carriers in remagnetized Cretaceous granitic rocks of northeast Japan were studied using paleomagnetism, rock magnetism, optical microscopy and scanning electron microscopy (SEM) by comparison with unremagnetized granitic rocks. The natural remanent magnetization (NRM) of the remagnetized rocks is strong (0.3–1.7 A/m) and shows a northwesterly direction with moderate inclination (NW remanence), whereas the unremagnetized rocks preserve weak NRM (
ISSN:0012-821X
1385-013X
DOI:10.1016/S0012-821X(00)00169-2