VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU
The directions of two-dimensional magnetic structures around the Kerguelen Plateau were determined by using vector anomalies of the geomagnetic field obtained during the 30th and 31st Japanese Antarctic Research Expeditions. N-S and E-W directions of magnetic structure are deduced in the basin to th...
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ftnipr:oai:nipr.repo.nii.ac.jp:00002698 2023-05-15T13:49:00+02:00 VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU ノギ ヨシフミ セアマ ノブカズ イセザキ ノブヒロ ハヤシ タモツ カミヌマ カツタダ Yoshifumi NOGI Nobukazu SEAMA Nobuhiro ISEZAKI Tamotsu HAYASHI Katsutada KAMINUMA 1991-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2698 http://id.nii.ac.jp/1291/00002698/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2698&item_no=1&attribute_id=18&file_no=1 en eng ABSTRACT Meteorological Research Institute Ocean Research Institute, University of Tokyo Faculty of Science, Chiba University Geographical Survey Institute National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2698 http://id.nii.ac.jp/1291/00002698/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 5, 160(1991-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2698&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1991 ftnipr 2022-11-26T19:42:11Z The directions of two-dimensional magnetic structures around the Kerguelen Plateau were determined by using vector anomalies of the geomagnetic field obtained during the 30th and 31st Japanese Antarctic Research Expeditions. N-S and E-W directions of magnetic structure are deduced in the basin to the east (around 60°S, 88-91°E) and over (around 60°S, 71-88°E) the Kerguelen Plateau. Topographic and structural lineaments bring about N-S and E-W directions of magnetic anomaly lineations over the Kerguelen Plateau. In farther east (around 59°S, east from 91°E), stable NW-SE directions are obtained. The obtained stable NW-SE directions are in good agreement with the already identified geomagnetic anomaly lineations originated from the Southeast Indian Ridge (WEISSEL and HAYES : Antarct. Res. Ser., Vol. 19,Am. Geophys. Union, 165,1972). Stable NE-SW directions in the west (58-61°S, 62-68°E) of the Kerguelen Plateau were newly found in this expedition. Because sea bottom topography and free-air gravity anomalies show no structural offset, stable NE-SW directions are due to the geomagnetic anomaly lineations produced by polarity reversals. NE-SW directions obtained from vector anomalies of the geomagnetic field support presumptive directions of the geomagnetic anomaly lineations originated from an ancient abandoned ridge, that is, the mid-ocean ridge between India and Antarctica from Late Jurassic (160Ma) to Middle Cretaceous (96Ma) (POWELL et al. : Tectonophysics, 155,261,1988). These results may provide detailed kinematics of the growth of the Indian Ocean. Report Antarc* Antarctic Antarctica National Institute of Polar Research Repository, Japan Antarctic Kerguelen Indian Hayes ENVELOPE(-64.167,-64.167,-66.833,-66.833) Southeast Indian Ridge ENVELOPE(110.000,110.000,-50.000,-50.000) |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
The directions of two-dimensional magnetic structures around the Kerguelen Plateau were determined by using vector anomalies of the geomagnetic field obtained during the 30th and 31st Japanese Antarctic Research Expeditions. N-S and E-W directions of magnetic structure are deduced in the basin to the east (around 60°S, 88-91°E) and over (around 60°S, 71-88°E) the Kerguelen Plateau. Topographic and structural lineaments bring about N-S and E-W directions of magnetic anomaly lineations over the Kerguelen Plateau. In farther east (around 59°S, east from 91°E), stable NW-SE directions are obtained. The obtained stable NW-SE directions are in good agreement with the already identified geomagnetic anomaly lineations originated from the Southeast Indian Ridge (WEISSEL and HAYES : Antarct. Res. Ser., Vol. 19,Am. Geophys. Union, 165,1972). Stable NE-SW directions in the west (58-61°S, 62-68°E) of the Kerguelen Plateau were newly found in this expedition. Because sea bottom topography and free-air gravity anomalies show no structural offset, stable NE-SW directions are due to the geomagnetic anomaly lineations produced by polarity reversals. NE-SW directions obtained from vector anomalies of the geomagnetic field support presumptive directions of the geomagnetic anomaly lineations originated from an ancient abandoned ridge, that is, the mid-ocean ridge between India and Antarctica from Late Jurassic (160Ma) to Middle Cretaceous (96Ma) (POWELL et al. : Tectonophysics, 155,261,1988). These results may provide detailed kinematics of the growth of the Indian Ocean. |
format |
Report |
author |
ノギ ヨシフミ セアマ ノブカズ イセザキ ノブヒロ ハヤシ タモツ カミヌマ カツタダ Yoshifumi NOGI Nobukazu SEAMA Nobuhiro ISEZAKI Tamotsu HAYASHI Katsutada KAMINUMA |
spellingShingle |
ノギ ヨシフミ セアマ ノブカズ イセザキ ノブヒロ ハヤシ タモツ カミヌマ カツタダ Yoshifumi NOGI Nobukazu SEAMA Nobuhiro ISEZAKI Tamotsu HAYASHI Katsutada KAMINUMA VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU |
author_facet |
ノギ ヨシフミ セアマ ノブカズ イセザキ ノブヒロ ハヤシ タモツ カミヌマ カツタダ Yoshifumi NOGI Nobukazu SEAMA Nobuhiro ISEZAKI Tamotsu HAYASHI Katsutada KAMINUMA |
author_sort |
ノギ ヨシフミ |
title |
VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU |
title_short |
VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU |
title_full |
VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU |
title_fullStr |
VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU |
title_full_unstemmed |
VECTOR ANOMALIES OF THE GEOMAGNETIC FIELD AROUND THE KERGUELEN PLATEAU |
title_sort |
vector anomalies of the geomagnetic field around the kerguelen plateau |
publisher |
ABSTRACT |
publishDate |
1991 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2698 http://id.nii.ac.jp/1291/00002698/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2698&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-64.167,-64.167,-66.833,-66.833) ENVELOPE(110.000,110.000,-50.000,-50.000) |
geographic |
Antarctic Kerguelen Indian Hayes Southeast Indian Ridge |
geographic_facet |
Antarctic Kerguelen Indian Hayes Southeast Indian Ridge |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2698 http://id.nii.ac.jp/1291/00002698/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 5, 160(1991-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2698&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250298971521024 |