KOPRI Repository

Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica

Cited 5 time in wos
Cited 5 time in scopus
Metadata Downloads
Title
Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica
Other Titles
남극 라슨 빙붕 B 해역의 제4기 말기 동안 퇴적된 퇴적물의 점토 광물 특성
Authors
Jung, Jaewoo
Yoo, Kyu-Cheul
Lee, Kee-Hwan
Park, Young Kyu
Lee, Jae Il
Kim, Jinwook
Subject
Mining & Mineral Processing; Mineralogy
Keywords
Larsen ice shelf; clay mineral composition; smectite; illite; isotopic composition; ice shelf retreat and advance
Issue Date
2019-03
Citation
Jung, Jaewoo, et al. 2019. "Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica". MINERALS, 9(3): 153-164.
Abstract
Variations in grain size, clay mineral composition, and stable isotopes (delta C-13 and delta N-15) are closely linked to the sedimentary facies that reflect mineralogical and geochemical modification during the retreat and advance of the Larsen ice shelf. A whole round core of marine sediment (EAP13-GC17, 236 cm below the sea floor) was collected on the northwestern Larsen B embayment of the Antarctic Peninsula during a marine geological expedition (the ARA13 Cruise Expedition by the Korea Polar Research Institute, 2013). Four sedimentary facies (U1-U4) were clearly distinguishable: bioturbated sandy mud (open marine, U1), laminated sandy mud (sub-floating ice shelf, U2), sandy clay aggregates (deglacial, U3), and muddy diamictons (sub-glacial, U4), as well as interbedded silty. Clay minerals, including smectite, chlorite, illite, and kaolinite, were detected throughout the core. An increase in the clay mineral ratio of smectite/(illite + chlorite) was clearly observed in the open marine condition, which was strongly indicated by both a heavier isotopic composition of delta C-13 and delta N-15 (-24.4 parts per thousand and 4.3 parts per thousand, respectively), and an abrupt increase in Be-10 concentration (similar to 30 times). An increase in the average values of the crystal packet thickness of illite (similar to 1.5 times) in U1 also indicated sediments transported in open marine conditions. Based on the clay mineral composition in U1, the sediments are likely to have been transported from the Weddell Sea. The clay mineralogical assessments conducted in this region have significant implications for our understanding of paleodepositional environments.
URI
https://repository.kopri.re.kr/handle/201206/10974
DOI
http://dx.doi.org/10.3390/min9030153
Appears in Collections  
2018-2018, Reconstruction of Antarctic ice sheet and ocean history for the past two million years using sediment records (18-18) / Lee, Jae Il (PE18030)
2017-2018, Reconstruction of Antarctic ice sheet and ocean history for the past two million years using sediment records (17-18) / Lee, Min Kyung; Lee, Jae Il (PE17030; PE18030)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse