Morphological characteristics of ocean core complexes (Occ) in central indian ridge using high-resolution bathymetry and backscatter intensity data from a deep-towed vehicle SCOPUS KCI

DC Field Value Language Hwang G. - Kim S.-S. - Son S.K. - Kim J. - Ko Y. - 2020-12-10T07:58:42Z - 2020-12-10T07:58:42Z - 2020-05-27 - 2020 -
dc.identifier.issn 1598-141X -
dc.identifier.uri -
dc.description.abstract We analyzed the morphological characteristics of OCC (Ocean Core Complexes) in the middle part of the Central Indian Ridge (MCIR) using high-resolution geophysical data recorded on the Deep-Tow SideScan Sonar IMI-30 system. In terms of slope-gradient variations calculated from the high-resolution bathymetry data, the normal faults formed by seafloor spreading were associated generally with slopes > 30° and resulted in high backscatter intensities, which reflect more topographic effects than acoustic medium variation. However, the areas associated with gentle slopes < 10° tend to show the backscatter intensities reflecting the acoustic characteristic of the medium. We show that the detachment faults exposing the OCCs were initiated with high-angle normal faults (58°) exhibiting outward and inward dips of a breakaway zone. In order to examine the spatial distribution of OCC structures, we characterized the transition from magmatic-dominant seafloor with abyssal hills to tectonic-dominant seafloor with OCC using the down-slope direction variation. The slope direction of the seafloor generally tends to be perpendicular to the ridge azimuth in the magmatic-dominant zone, whereas it becomes parallel to the given ridge azimuth near the OCC structures. Therefore, this spatial change of seafloor slope directions indicates that the formation of OCC structures is causally associated with the tectonic-dominant spreading rather than magmatic extension. These results also suggest that the topographical characteristics of seafloor spreading and OCC structures can be distinguished using high-resolution geophysical data. Thus, we propose that the high-resolution bathymetry and backscatter intensity data can help select potential areas of exploitation of hydrothermal deposits in MCIR effectively. © 2020, Korea Institute of Ocean Science and Technology. All rights reserved. -
dc.description.uri 3 -
dc.language English -
dc.publisher Korea Institute of Ocean Science and Technology -
dc.title Morphological characteristics of ocean core complexes (Occ) in central indian ridge using high-resolution bathymetry and backscatter intensity data from a deep-towed vehicle -
dc.type Article -
dc.citation.endPage 61 -
dc.citation.startPage 49 -
dc.citation.title Ocean and Polar Research -
dc.citation.volume 42 -
dc.citation.number 1 -
dc.identifier.bibliographicCitation Ocean and Polar Research, v.42, no.1, pp.49 - 61 -
dc.identifier.doi 10.4217/OPR.2020.42.1.049 -
dc.identifier.scopusid 2-s2.0-85083298598 -
dc.type.docType Article -
dc.identifier.kciid ART002569434 -
dc.description.journalClass 3 -
dc.subject.keywordPlus bathymetry -
dc.subject.keywordPlus exploitation -
dc.subject.keywordPlus geophysical survey -
dc.subject.keywordPlus hydrothermal activity -
dc.subject.keywordPlus normal fault -
dc.subject.keywordPlus seafloor mapping -
dc.subject.keywordPlus seafloor spreading -
dc.subject.keywordPlus shipborne measurement -
dc.subject.keywordPlus sonar imagery -
dc.subject.keywordPlus structural geology -
dc.subject.keywordPlus tectonic setting -
dc.subject.keywordPlus topographic effect -
dc.subject.keywordPlus topographic mapping -
dc.subject.keywordPlus Central Indian Ridge -
dc.subject.keywordPlus Indian Ocean -
dc.subject.keywordPlus Mid-Indian Ridge -
dc.subject.keywordAuthor Central Indian Ridge -
dc.subject.keywordAuthor Down-slope direction -
dc.subject.keywordAuthor Ocean core complexes -
dc.subject.keywordAuthor Seafloor spreading -
dc.subject.keywordAuthor Sidescan sonar -
dc.description.journalRegisteredClass scopus -
dc.description.journalRegisteredClass kci -
Appears in Collections:
Marine Resources Research Division > Deep-sea Mineral Resources Research Center > 1. Journal Articles
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