| File | |
| Title |
古第三紀花崗岩の古地磁気(I)
|
| Title |
Paleomagnetism of Some Paleogene Granite(I)
|
| Title Transcription |
コダイサンキ カコウガン ノ コチジキ １
|
| Creator |
Ito Haruaki
Tokieda Katsuyasu
|
| Source Title |
島根大学文理学部紀要. 理学科編
Memoirs of the Faculty of Literature and Science, Shimane University. Natural sciences
|
| Volume | 5 |
| Start Page | 23 |
| End Page | 28 |
| Journal Identifire |
ISSN 03709434
|
| Descriptions |
Abstract
Granitic rocks dated at 36 to 64 million years were collected from eight localities in San-in distnct, and the magnetrc polality versus their ages was determined by paleomagnetic methods. Samples dated at 57±3 and 63 million years have shown the normal polarity after stability tests and those dated at 46 and 50±6 million years the reversed polarity. The direction of the natural remanent magnetization of samples taken from Ningyo-toge, Sangenya and Otani deviated slightly from the present geomagnetic field direction. It rs likely to be due to change in directron of the geomagnetic field such as a field reversal or secular variation.
|
| Language |
eng
|
| Resource Type | departmental bulletin paper |
| Publisher |
島根大学文理学部
The Faculty of Literature and Science, Shimane University
|
| Date of Issued | 1972-03-10 |
| Access Rights | open access |
| Relation |
[NCID]
AN0010806X
|
