Paleomagnetism of three seamounts northwest of the Marshall Islands from magnetic inversion SCOPUS KCI

Title
Paleomagnetism of three seamounts northwest of the Marshall Islands from magnetic inversion
Author(s)
Lee, T.-G.; Moon, J.-W.; Ko, Y.-T.; Jung, M.-S.; Kim, H.-S.; Lee, K.
KIOST Author(s)
Moon, Jai Woon(문재운)Ko, Youngtak(고영탁)Kim, Hyun Sub(김현섭)
Publication Year
2004
Abstract
Total magnetic field measurements were performed to study paleomagnetism of three seamounts (OSM7, OSM8-1, and OSM8-2) to the northwest of the Marshall Islands in the western Pacific. The study area is located at the Ogasawara Fracture Zone which is a boundary between the Pigafetta and East Mariana basins. The magnetic parameters and paleopoles of three seamounts were derived from inversion of the measured magnetic field. The goodness-of-fit ratio of OSM7 is too low to be included to the estimation of parameters. The complex magnetic anomalies of center, scarcity of flank rift zones and steep slope at OSM7 suggest that the multiple intrusions of magma converge into the center of volcanic edifice. Inclination calculated from the magnetic anomalies of OSM8-1 and OSMS-2 is -41.2°, and the paleolatitude calculated from the inclination is 23.6°S. The corresponding paleopoles for OSM8-1 and OSM8-2 are (24° 42′W, 48° 54′N) and (18° 18′W, 48° 30′N), respectively. In comparison with the apparent polar wander path (APWP) of the Pacific plate, the paleopoles are close to 129-Ma pole. The paleopoles and paleolatitudes of OSM8-1 and OSM8-2 suggest that they were formed at similar time and location. The seamounts have drifted northward about 41° from the paleolatitude to present latitude of seamounts.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5321
DOI
10.4217/OPR.2004.26.4.559
Bibliographic Citation
Ocean and Polar Research, v.26, no.4, pp.559 - 565, 2004
Publisher
Korea Ocean Research and Development Institute
Subject
magnetic anomaly; magnetic field; paleolatitude; paleomagnetism; polar wandering; seamount; Mariana Trough; oceanic regions; Pacific Ocean; World; Pigafetta
Keywords
Apparent polar wander path; Flank rift zone; Ogasawara Fracture Zone; Paleopole; Total magnetic field
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Deep seabed exploration,Geochemistry,심해저자원탐사,지화학

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