Kuniyuki Furukawa   Koji Uno   Isoji Miyagi   
Journal of Volcanology and Geothermal Research 198 348-354 2010年12月 [査読有り]
Vertical variation of the oxidation state as recorded by Fe-Ti oxides of Takanoobane rhyolite lava (TR lava) is revealed on the basis of petrographic and rock magnetic studies. Petrographic observations of the interior of TR lava showed that Fe-Ti...
Masako Miki   Aya Taniguchi   Masahiko Yokoyama   Chitaro Gouzu   Hironobu Hyodo   Koji Uno   Haider Zaman   Yo-ichiro Otofuji   
Geophysical Journal International 179 18-34 2009年10月 [査読有り]
P>Intensity of the geomagnetic field during the Archaean can potentially be used to study an evolution of the dynamo activity in the Earth's core. In order to investigate this issue, we present new palaeomagnetic and geochronological results fr...
Kenji Tanaka   Chuanlong Mu   Ken Sato   Kazuhiro Takemoto   Daisuke Miura   Yuyan Liu   Haider Zaman   Zhenyu Yang   Masahiko Yokoyama   Hisanori Iwamoto   Koji Uno   Yo-ichiro Otofuji   
Geophysical Journal International 175 713-728 2008年11月 [査読有り]
Lower to Middle Cretaceous red sandstones were sampled at four localities in the Lanpin-Simao fold belt of the Shan-Thai Block to describe its regional deformational features. Most of the samples revealed a characteristic remanent magnetization wi...
Yasuto Itoh   Koji Uno   Hiroyuki Arato   
Journal of Asian Earth Sciences 27 933-942 2006年10月 [査読有り]
Neogene rift system configuration for the back-arc of southwest Japan, southern rim of the Japan Sea, is argued on the basis of reflection seismic interpretation. Divergent rifting and subsequent contraction provoked by an arc-arc collisional even...
Red beds have been recognized as a useful source of ancient geomagnetic field. However, the timing of remanence acquisition in red beds is still incompletely understood. Fold tests may be used for an estimation of the timing of red bed remanence a...