| 著者名 | Authors | 所属機関名 | 所属機関名(欧文) | |
| 1 | #畠山唯達 | Hatakeyama/Tadahiro | 東京大学理学部地球惑星物理学教室 | Dept. of Earth and Planetary Physics, Faculty of Science, |
| 2 | 浜野/洋三 | Hamano/Yozo | 東京大学理学部地球惑星物理学教室 | Dept. of Earth and Planetary Physics, Faculty of Science, |
講演予稿:
西オーストラリア, ピルバラ地塊東部ノースポール地域の層状チャ
ート(35億年)について段階的熱消磁法によって安定な磁化の方向が
得られた. その結果は現代の磁場方向と大きく違い, またサイトに
よって褶曲テストについて好意的な結果を示した.
abstract:
Banded chert in North Pole region, Pilbara craton, Western Australia,
was intruded and folded by a granitic batholith in 3.5 billion years
ago. From the results of paleomagnetic measurements from two sites,
which are located in the south (site A) and east (site B) of the
granitic dome, with stepwise thermal demagnetization, it is indicated
that the paleomagnetic directions of the samples from each site are
far from the present field direction, that the directions of the two
blocks form the site B is roughly antipodal, and that the difference
of the directions between site A and B is smaller afterthe bedding
correction than that before.
キーワード:
古地磁気,褶曲テスト,層状チャート,太古代
Keywords:
paleomagnetism, fold test, banded chert, Archean