Abstract
This paper describes the results from the qualitative analysis of magnetic anomalies offshore of western Kyushu and from an analysis by a three-dimensional two-layer model inversion. The analysis ranged from Kyushu on the east to Jeju Island on the west and from the southern part of the Korean Peninsula on the north to Tanegashima and Yakushima Islands on the south, namely, the area of 580km from east to west and 580km from south to north. The analytical data used was Magnetic Anomaly Map of Asia (GSJ and CCOP, 1994). In the qualitative analysis, a pseudogravity anomaly map and a pole gravity anomaly map were prepared from the total magnetic force anomaly map by means of a frequency filter operation. As a result, it was noted that two distinctive magnetic high belts existed in the margin of the Tunghai Shelf, extending from the sea area to the west of the Nansei Islands continuously to NNE, and being distributed transversely through the Goto sedimentary basin. Additionally, in the inversion analysis, it was demonstrated that the magnetic basement became shallow at the margin of the Tunghai Shelf north of latitude 31 degrees north, extending nearly in the NNE direction through west of the
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Okuma, S;
Nakatsuka, T;
[1]
Ishihara, T
[2]
- Geological Survey of Japan, Tsukuba (Japan)
- Japan National Oil Corp., Tokyo (Japan)
Citation Formats
Okuma, S, Nakatsuka, T, and Ishihara, T.
Magnetic constraints of basement structure offshore of western Kyushu, Japan; Kyushu seiho kaiiki ni okeru jiki ijo no kaiseki.
Japan: N. p.,
1996.
Web.
Okuma, S, Nakatsuka, T, & Ishihara, T.
Magnetic constraints of basement structure offshore of western Kyushu, Japan; Kyushu seiho kaiiki ni okeru jiki ijo no kaiseki.
Japan.
Okuma, S, Nakatsuka, T, and Ishihara, T.
1996.
"Magnetic constraints of basement structure offshore of western Kyushu, Japan; Kyushu seiho kaiiki ni okeru jiki ijo no kaiseki."
Japan.
@misc{etde_395539,
title = {Magnetic constraints of basement structure offshore of western Kyushu, Japan; Kyushu seiho kaiiki ni okeru jiki ijo no kaiseki}
author = {Okuma, S, Nakatsuka, T, and Ishihara, T}
abstractNote = {This paper describes the results from the qualitative analysis of magnetic anomalies offshore of western Kyushu and from an analysis by a three-dimensional two-layer model inversion. The analysis ranged from Kyushu on the east to Jeju Island on the west and from the southern part of the Korean Peninsula on the north to Tanegashima and Yakushima Islands on the south, namely, the area of 580km from east to west and 580km from south to north. The analytical data used was Magnetic Anomaly Map of Asia (GSJ and CCOP, 1994). In the qualitative analysis, a pseudogravity anomaly map and a pole gravity anomaly map were prepared from the total magnetic force anomaly map by means of a frequency filter operation. As a result, it was noted that two distinctive magnetic high belts existed in the margin of the Tunghai Shelf, extending from the sea area to the west of the Nansei Islands continuously to NNE, and being distributed transversely through the Goto sedimentary basin. Additionally, in the inversion analysis, it was demonstrated that the magnetic basement became shallow at the margin of the Tunghai Shelf north of latitude 31 degrees north, extending nearly in the NNE direction through west of the Goto Islands, west of Tsushima Island, and continuing to the southern coast of the Korean Peninsula. 6 refs., 4 figs.}
place = {Japan}
year = {1996}
month = {May}
}
title = {Magnetic constraints of basement structure offshore of western Kyushu, Japan; Kyushu seiho kaiiki ni okeru jiki ijo no kaiseki}
author = {Okuma, S, Nakatsuka, T, and Ishihara, T}
abstractNote = {This paper describes the results from the qualitative analysis of magnetic anomalies offshore of western Kyushu and from an analysis by a three-dimensional two-layer model inversion. The analysis ranged from Kyushu on the east to Jeju Island on the west and from the southern part of the Korean Peninsula on the north to Tanegashima and Yakushima Islands on the south, namely, the area of 580km from east to west and 580km from south to north. The analytical data used was Magnetic Anomaly Map of Asia (GSJ and CCOP, 1994). In the qualitative analysis, a pseudogravity anomaly map and a pole gravity anomaly map were prepared from the total magnetic force anomaly map by means of a frequency filter operation. As a result, it was noted that two distinctive magnetic high belts existed in the margin of the Tunghai Shelf, extending from the sea area to the west of the Nansei Islands continuously to NNE, and being distributed transversely through the Goto sedimentary basin. Additionally, in the inversion analysis, it was demonstrated that the magnetic basement became shallow at the margin of the Tunghai Shelf north of latitude 31 degrees north, extending nearly in the NNE direction through west of the Goto Islands, west of Tsushima Island, and continuing to the southern coast of the Korean Peninsula. 6 refs., 4 figs.}
place = {Japan}
year = {1996}
month = {May}
}