Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode
Knowledge on spatial distribution, provenance and delivery mode of surface sediment aids in interpretation of nearby sediment records for paleoenvironmental reconstruction. Such knowledge, however, remains largely unknown for the modern Ross Sea, Antarctica: a key region for understanding the dynami...
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ftdoajarticles:oai:doaj.org/article:4a0704890e42410aa2dcd56215cb9567 2024-02-11T09:56:06+01:00 Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode Li Wu Longwei Li Rujian Wang Hebin Shao Yi Chen Zipei Lin Yue Liu Wenshen Xiao Ran Xu 2024-01-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1324391 https://doaj.org/article/4a0704890e42410aa2dcd56215cb9567 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1324391/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1324391 https://doaj.org/article/4a0704890e42410aa2dcd56215cb9567 Frontiers in Marine Science, Vol 10 (2024) surface sediment ross sea grain-size iceberg rafted debris clay mineralogy Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2024 ftdoajarticles https://doi.org/10.3389/fmars.2023.1324391 2024-01-14T01:38:19Z Knowledge on spatial distribution, provenance and delivery mode of surface sediment aids in interpretation of nearby sediment records for paleoenvironmental reconstruction. Such knowledge, however, remains largely unknown for the modern Ross Sea, Antarctica: a key region for understanding the dynamical behavior of Antarctic Ice Sheet over geological past. In this study, we address this gap by analyzing the grain-size distribution, coarse fraction (>250 μm) lithology, and clay mineralogy of a set of surface sediment samples covering the whole Ross Sea continental shelf. Our data reveals that the sediments were mostly delivered by icebergs and bottom currents. Iceberg delivery was significantly controlled by factors such as water depth, proximity to the iceberg sources, and invasion of the Modified Circumpolar Deep Water. Bottom current activity was stronger in the Western Ross Sea (WRS) than in the Eastern Ross Sea (ERS), controlled by the formation and transport of Dense Shelf Water. Three major sorts of coarse fraction were identified, including the quartz-rich Iceberg Rafted Detritus (IRD) originating from West Antarctic glaciers and primarily distributed in the ERS, the mafic rocks-rich IRD from the Ferrar Group as well as the McMurdo Volcanic Group and mainly found in the WRS, and deformed silt traced back to the grounding zone of the David Glacier-Dragalski Ice Tongue system. The distribution of clay minerals is dominated by a distinct binary mixing pattern. Smectite and kaolinite are mainly present in the ERS, derived from beneath the West Antarctic Ice Sheet. Higher illite and chlorite contents were found offshore of the Southern Victoria Land, derived from the East Antarctic craton. Overall, these results demonstrate that the glaciers draining into Ross Sea from both the East and West Antarctic Ice Sheets are highly dynamical in the context of modern climate conditions, with implications for potential contribution to future sea level rise. Article in Journal/Newspaper Antarc* Antarctic Antarctica David Glacier Ice Sheet Iceberg* Ross Sea Victoria Land Directory of Open Access Journals: DOAJ Articles Antarctic David Glacier ENVELOPE(160.000,160.000,-75.333,-75.333) Ross Sea Victoria Land West Antarctic Ice Sheet Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
surface sediment ross sea grain-size iceberg rafted debris clay mineralogy Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
surface sediment ross sea grain-size iceberg rafted debris clay mineralogy Science Q General. Including nature conservation geographical distribution QH1-199.5 Li Wu Longwei Li Rujian Wang Hebin Shao Yi Chen Zipei Lin Yue Liu Wenshen Xiao Ran Xu Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode |
topic_facet |
surface sediment ross sea grain-size iceberg rafted debris clay mineralogy Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Knowledge on spatial distribution, provenance and delivery mode of surface sediment aids in interpretation of nearby sediment records for paleoenvironmental reconstruction. Such knowledge, however, remains largely unknown for the modern Ross Sea, Antarctica: a key region for understanding the dynamical behavior of Antarctic Ice Sheet over geological past. In this study, we address this gap by analyzing the grain-size distribution, coarse fraction (>250 μm) lithology, and clay mineralogy of a set of surface sediment samples covering the whole Ross Sea continental shelf. Our data reveals that the sediments were mostly delivered by icebergs and bottom currents. Iceberg delivery was significantly controlled by factors such as water depth, proximity to the iceberg sources, and invasion of the Modified Circumpolar Deep Water. Bottom current activity was stronger in the Western Ross Sea (WRS) than in the Eastern Ross Sea (ERS), controlled by the formation and transport of Dense Shelf Water. Three major sorts of coarse fraction were identified, including the quartz-rich Iceberg Rafted Detritus (IRD) originating from West Antarctic glaciers and primarily distributed in the ERS, the mafic rocks-rich IRD from the Ferrar Group as well as the McMurdo Volcanic Group and mainly found in the WRS, and deformed silt traced back to the grounding zone of the David Glacier-Dragalski Ice Tongue system. The distribution of clay minerals is dominated by a distinct binary mixing pattern. Smectite and kaolinite are mainly present in the ERS, derived from beneath the West Antarctic Ice Sheet. Higher illite and chlorite contents were found offshore of the Southern Victoria Land, derived from the East Antarctic craton. Overall, these results demonstrate that the glaciers draining into Ross Sea from both the East and West Antarctic Ice Sheets are highly dynamical in the context of modern climate conditions, with implications for potential contribution to future sea level rise. |
format |
Article in Journal/Newspaper |
author |
Li Wu Longwei Li Rujian Wang Hebin Shao Yi Chen Zipei Lin Yue Liu Wenshen Xiao Ran Xu |
author_facet |
Li Wu Longwei Li Rujian Wang Hebin Shao Yi Chen Zipei Lin Yue Liu Wenshen Xiao Ran Xu |
author_sort |
Li Wu |
title |
Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode |
title_short |
Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode |
title_full |
Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode |
title_fullStr |
Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode |
title_full_unstemmed |
Grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from Ross Sea, Antarctica: implications for their provenance and delivery mode |
title_sort |
grain-size, coarse fraction lithology and clay mineral compositions of surface sediments from ross sea, antarctica: implications for their provenance and delivery mode |
publisher |
Frontiers Media S.A. |
publishDate |
2024 |
url |
https://doi.org/10.3389/fmars.2023.1324391 https://doaj.org/article/4a0704890e42410aa2dcd56215cb9567 |
long_lat |
ENVELOPE(160.000,160.000,-75.333,-75.333) |
geographic |
Antarctic David Glacier Ross Sea Victoria Land West Antarctic Ice Sheet |
geographic_facet |
Antarctic David Glacier Ross Sea Victoria Land West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica David Glacier Ice Sheet Iceberg* Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica David Glacier Ice Sheet Iceberg* Ross Sea Victoria Land |
op_source |
Frontiers in Marine Science, Vol 10 (2024) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1324391/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1324391 https://doaj.org/article/4a0704890e42410aa2dcd56215cb9567 |
op_doi |
https://doi.org/10.3389/fmars.2023.1324391 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
_version_ |
1790600662889791488 |