A Eurasian Basin sedimentary record of glacial impact on the central Arctic Ocean during MIS 1-4

被引：6

作者：

Dong, Linsen ^{[1
,2
]}

Polyak, Leonid ^{[3
]}

Xiao, Xiaotong ^{[4
]}

Brachfeld, Stefanie ^{[5
]}

Liu, Yanguang ^{[1
,2
]}

Shi, Xuefa ^{[1
,2
]}

Fang, Xisheng ^{[1
]}

Bai, Yazhi ^{[1
]}

Zhu, Aimei ^{[1
]}

Li, Chaoxin ^{[1
]}

Zhao, Song ^{[1
,6
]}

Wu, Dong ^{[7
]}

Wang, Chunjuan ^{[8
]}

机构：

[1] Minist Nat Resources, Key Lab Marine Geol & Metallogeny, Inst Oceanog 1, Qingdao 266061, Peoples R China

[2] Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Geol, Qingdao 266061, Peoples R China

[3] Ohio State Univ, Byrd Polar & Climate Res Ctr, Columbus, OH 43210 USA

[4] Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao 266100, Peoples R China

[5] Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ USA

[6] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing, Peoples R China

[7] Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China

[8] Minist Nat Resources, Key Lab Coastal Sci & Integrated Management, Qingdao 266061, Shandong, Peoples R China

来源：

GLOBAL AND PLANETARY CHANGE | 2022年 / 219卷

基金：

中国国家自然科学基金;

关键词：

Arctic Ocean; Eurasian Basin; Sediment stratigraphy; Radiocarbon dating; Magnetostratigraphy; Paleoceanography; Glacial history; Late Pleistocene; TERRESTRIAL ORGANIC-MATTER; SEA-ICE; LOMONOSOV RIDGE; QUATERNARY SEDIMENTS; MENDELEEV RIDGE; YERMAK PLATEAU; AMUNDSEN BASIN; CHUKCHI MARGIN; FRAM STRAIT; HISTORY;

D O I：

10.1016/j.gloplacha.2022.103993

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Pronounced Quaternary circulation and depositional changes in the Arctic Ocean basins remain poorly under-stood. We investigate sediment core ARC5-ICE4 (ICE4) in the Eurasian (Amundsen) Basin off the Lomonosov Ridge to reconstruct glacial-interglacial variability in sediment sources and circulation. The ICE4 record features variable lithologies including distinct glacigenic deposits with Ice Rafted Debris (IRD). The sediment age is constrained by a combination of the organic carbon 14C with paleomagnetic data and correlation to earlier developed stratigraphies. The derived sedimentation rates constitute several cm/kyr (6.5 cm/kyr average) consistent with estimates from regional geophysical data. The developed age model covers the time interval from ca. 10 to 75 ka including Late and Middle Weichselian/Wisconsinian glaciations. Respective glacigenic sediments were primarily deposited by pulsed iceberg discharge. The Last Glacial Maximum and deglaciation is expressed in sharp IRD peaks including mineral proxies of the Laurentide Ice Sheet with an apparent millennial-scale variability. The older glacigenic sedimentary unit with abundant IRD of predominantly Siberian provenance was deposited during deglaciation of the Middle Weichselian (MIS 4/3) Eurasian Ice Sheet. These sedimentary differences indicate diverging impacts of the two glaciations on the Arctic Ocean, including ice-sheet sizes/ge-ometries and oceanic circulation.

引用

页数：19

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