Geophysical investigation of seamounts near the Ogasawara Fracture Zone, western Pacific SCIE SCOPUS

Cited 5 time in WEB OF SCIENCE Cited 7 time in Scopus
Title
Geophysical investigation of seamounts near the Ogasawara Fracture Zone, western Pacific
Author(s)
Lee, Tae-Gook; Lee, Kichwa; Hein, James R.; Moon, Jai-Woon
KIOST Author(s)
Moon, Jai Woon(문재운)
Publication Year
2009
Abstract
This paper provides an analysis of multi-channel seismic data obtained during 2000-2001 on seamounts near the Ogasawara Fracture Zone (OFZ) northwest of the Marshall Islands in the western Pacific. The OFZ is unique in that it is a wide rift zone that includes many seamounts. Seven units are delineated on the basis of acoustic characteristics and depth: three units (I, II, and III) on the summit of seamounts and four units (IV, V, VI, and VII) in basins. Acoustic characteristics of layers on the summit of guyots and dredged samples indicate that the seamounts had been built above sea level by volcanism. This was followed by reef growth along the summit margin, which enabled deposition of shallow-water carbonates on the summit, and finally by subsidence of the edifices. The subsidence depth of the seamounts, estimated from the lower boundary of unit II, ranges between 1,550 and 2,040 in. The thick unit I of the southern seamounts is correlated with proximity to the equatorial high productivity zone, whereas local currents may have strongly affected the distribution of unit I on northern seamounts. A seismic profile in the basin around the Ita Mai Tai and OSM4 seamounts shows an unconformity between units IV and V, which is widespread from the East Mariana Basin to the Pigafetta Basin.
ISSN
1343-8832
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4388
DOI
10.1186/BF03352914
Bibliographic Citation
EARTH PLANETS AND SPACE, v.61, no.3, pp.319 - 331, 2009
Publisher
TERRA SCIENTIFIC PUBL CO
Subject
MAGNETIC ANOMALY LINEATIONS; OCEAN; VOLCANISM
Keywords
Ogasawara Fracture Zone; acoustic characteristics; subsidence depth; unconformity
Type
Article
Language
English
Document Type
Article
Publisher
TERRA SCIENTIFIC PUBL CO
Related Researcher
Research Interests

Deep seabed exploration,Geochemistry,심해저자원탐사,지화학

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