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High-Resolution Seismic Stratigraphy, Glacigenic Sedimentary Processes and Seafloor Morphology in the Chukchi Rise (The Arctic Ocean): Preliminary Results

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Title
High-Resolution Seismic Stratigraphy, Glacigenic Sedimentary Processes and Seafloor Morphology in the Chukchi Rise (The Arctic Ocean): Preliminary Results
Other Titles
북극해 척치해저고원에서의 고해상도 탄성파 층서해석, 빙하기 퇴적 과정 및 해저지형 : 초기 결과
Authors
Kim, Sookwan
Kim, Hyung J.
Jung, Jinhoon
Choi, Yeonjin
Lee, MinGyu
Jang, UGeun
Kang, Seung-Goo
Hong, Jong Kuk
Jin, Young Keun
Keywords
Arctic ocean; Chukchi rise; Glacial sediment; Seafloor morphology; Seismic stratigraphy
Issue Date
2019
Citation
Kim, Sookwan, et al. 2019. High-Resolution Seismic Stratigraphy, Glacigenic Sedimentary Processes and Seafloor Morphology in the Chukchi Rise (The Arctic Ocean): Preliminary Results. The 25th International Symposium on Polar Sciences. KOPRI. 2019.05.14~2019.05.15.
Abstract
The Chukchi Rise in the Arctic Ocean is a northward extension of the Chukchi continental shelf. Evidence for widespread glacial-sedimentary processes are recorded in the subsurface sediments and submarine landforms in this region. Densely spaced high-resolution sub-bottom profiler (SBP) data and multibeam bathymetry grid were acquired in the southeastern slope of the Chukchi Rise during the RV Araon expeditions of in 2016 and 2018 in the frame of the KOPRI-AMAGE project (PM18050). The SBP data show the large scale (a few to tens of km lateral extent and ca. 20-m thick) wedge-shaped sediment body of transparent acoustic facies interbedded with laminated sediments in the shelf edge and upper slope. Distinctive seafloor morphological features (e.g. mounds, shelf-edge parallel ridges, undulated seafloor, and curvy and streamlined lineation) are recognized on the multibeam bathymetry grid. In this study, we classified acoustic facies and defined major seismic stratigraphic unit boundaries to identify the spatio-temporal distribution of acoustic facies, paleo-bathymetry and sediment thickness. The newly acquired subsurface and bathymetric data could provide useful insight into the former ice sheet behavior and subglacial, ice-marginal, and glaciomarine sedimentary processes. Our results will be used to reconstruct sedimentary processes relating to ice sheet evolution, formation of gas hydrate mounds, slope stability with changes of sedimentation in the Chukchi Rise through the Late Neogene and Quaternary.
URI
https://repository.kopri.re.kr/handle/201206/12276
Conference Name
The 25th International Symposium on Polar Sciences
Conference Place
KOPRI
Conference Date
2019.05.14~2019.05.15
Appears in Collections  
2019-2020, Investigation of submarine resource environment and seabed methane release in the Arctic (19-20) / Jin, Young Keun (PM19050)
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