Tertiary Tectonic Movement of Central Japan Inferred from Paleomagnetic Studies
Tertiary Tectonic Movement of Central Japan Inferred from Paleomagnetic Studies
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古地磁研究推断的日本中部第三次构造运动
DOI：
10.5636/jgg.38.311
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
A. Takeuchi
中科院分区：
文献类型：
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作者：
K. Hirooka;H. Sakai;Toru Takahashi;Toru Takahashi;Hiroshi Kinoto;A. Takeuchi
对日本中部Itoigawa-Shizuoka构造线两侧的诺托半岛、佐渡岛、新泻县和福岛县4个地区的第三纪火山岩进行了古地磁研究，发现16 Ma以上的岩石在构造线两侧的磁偏角有明显的差异。诺托地区的古地磁平均磁偏角没有明显的偏折，而佐渡和福岛地区的磁偏角偏西17° ~ 27°，另外，新泻和福岛地区14 Ma以前的平均磁偏角也略有差异。它的结论是，旋转构造仍在继续，直到晚中新世的时间在日本中部的东部，日本中部不是一个单一的构造块，但已分为几个局部子块。
Paleomagnetic studies of the Tertiary volcanic rocks were carried out in the four regions of the Noto Peninsula, the Sado Island, Niigata Prefecture and Fukushima Prefecture located on both sides of the Itoigawa-Shizuoka tectonic line in central Japan.Rocks older than 16 Ma show a clear contrast in their declinations between the sides of the line. The paleomagnetic mean declination for the Noto region shows no significant deflection while those of the Sado and Fukushima regions are deflected westerly by 17° to 27°.Moreover, as for the mean declinations for the period younger than 14Ma, there is a slight difference recognized between the data obtained from Niigata and Fukushima regions. It is concluded that the rotational tectonisms were still continuing until the late Miocene time in the eastern part of central Japan, and that central Japan was not a single tectonic block but has divided into several local sub-blocks.
DOI：
10.1098/rspa.1953.0064
发表时间：
1953-01-01
影响因子：
--
作者：
FISHER, R
通讯作者：
FISHER, R