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Petrological and geochemical compositions of beach sands of the Barton and Weaver peninsulas of King George Island, West Antarctica: implications for provenance and depositional history

Cited 4 time in wos
Cited 3 time in scopus
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Title
Petrological and geochemical compositions of beach sands of the Barton and Weaver peninsulas of King George Island, West Antarctica: implications for provenance and depositional history
Other Titles
암석학 및 지화학 조성을 통한 서남극 킹조지섬 바톤반도와 위버반도 해빈 모래의 기원지와 퇴적 역사
Authors
Lee, Yong Il
Choi, Taejin
Lim, Hyoun Soo
Subject
Geology
Issue Date
2019-06
Citation
Lee, Yong Il, Choi, Taejin, Lim, Hyoun Soo. 2019. "Petrological and geochemical compositions of beach sands of the Barton and Weaver peninsulas of King George Island, West Antarctica: implications for provenance and depositional history". EPISODES, 42(2): 149-164.
Abstract
The provenance of modern beach sands from the Barton and Weaver peninsulas of King George Island, South Shetland Islands, West Antarctica was investigated based on their modal composition and geochemical data. The source rocks and provenance tectonic setting are interpreted as volcanic and plutonic rocks formed in the magmatic arc setting. This interpretation is generally consistent with the currently distributed bedrocks in the ice-free areas and tectonic setting of King George Island. However, the composition of beach sands of the Barton and Weaver peninsulas is different from distribution of bedrocks exposed in the ice-free areas of both peninsulas. The present beach sands are interpreted as previous subaqueous moraines that were eroded and transported by advancing glaciers across the both peninsulas and deposited in front of the glacier grounding line. In other words, sand sediments in the beaches of the two peninsulas were not derived from bedrocks currently exposed in ice-free areas, but it is interpreted that they were subaqueous moraines before deglaciation and were mixed with sediment derived from wave erosion of bedrocks and sediments of the paleoshoreline during the isostatic uplift of King George Island. Finally, they were reworked under the current beach environments.
URI
https://repository.kopri.re.kr/handle/201206/10940
DOI
http://dx.doi.org/10.18814/epiiugs/2019/019012
Appears in Collections  
2019-2019, Reconstruction of Antarctic ice sheet and ocean history for the past two million years using sediment records (19-19) / Lee, Jae Il (PE19030)
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