A study on the structure and origin of the Dokdo and it's surroundings in the East Sea (Japan Sea) using magnetic anomalies SCOPUS KCI

Title
A study on the structure and origin of the Dokdo and it's surroundings in the East Sea (Japan Sea) using magnetic anomalies
Author(s)
Kim, C.H.; Park, C.H.; Min, K.D.; Han, H.C.; Kwon, M.S.; Shim, J.S.; Choi, S.H.; Oh, S.B.
Publication Year
2002-12
Abstract
Magnetic anomalies in the Dokdo and it's surroundings were investigated with respect to structure and origin of the Dokdo and surrounding seamounts. After normal and diurnal correction of measured magnetic data, crossover correction was applied to reduce errors between sets of magnetic anomalies. The errors from crossover operation result in decrease of about 51%, from 62.2 nT to 30.1 nT in standard deviation. Reduction-to-the-pole, second vertical derivative and analytic signal processing were applied to explore magnetic anomaly signatures in detail. Magnetic anomalies are most complicated in the 1st-Dok seamount, show SWW-NEE linear pattern in the 2nd-Dok seamount and lower to the 3rd-Dok seamount. Different magnetic anomaly patterns in three seamounts imply that three volcanic seamounts were formed at different times and are composed of rocks that were produced in different conditions. It seems that the 3rd-Dok seamount was first to form and followed by the 1st-Dok seamount. The complicated magnetic and second vertical derivative anomaly patterns in the 1st-Dok seamount may be due to subsidiary cones around crater or the presence of intruded magma bodies below sea surface and the Dokdo is probably a marginal subsidiary part of crater.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5789
DOI
10.4217/OPR.2002.24.4.491
Bibliographic Citation
Ocean and Polar Research, v.24, no.4, pp.491 - 500, 2002
Publisher
Korea Ocean Research and Development Institute
Keywords
Analytic signal processing; Crater; Crossover correction; Diurnal correction; Dokdo; Magnetic data; Reduction-to-the-pole; Second vertical derivative; Subsidiary cone
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
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