Glacial-interglacial sedimentation and paleocirculation at the Northwind Ridge, western Arctic Ocean
Glacial-interglacial sedimentation and paleocirculation at the Northwind Ridge, western Arctic Ocean
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北冰洋西部北风海脊的冰期-间冰期沉积和古环流
DOI：
10.1016/j.quascirev.2021.106882
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发表时间：
2021-04
影响因子：
4
通讯作者：
Diekmann Bernhard
中科院分区：
文献类型：
--
作者：
Wang Rong;Polyak Leonid;Zhang Weiyan;Yu Xiaoguo;Ye Liming;Dong Linsen;Liu Yanguang;Wang Weiguo;Diekmann Bernhard
北极楚科奇-阿拉斯加边缘以北的北风岭沉积物岩心进行了分析，一套地层和物源代理。基于与先前研究的区域记录的相关性，所研究的岩心呈现了千年时间尺度上的海洋同位素阶段（MIS）1-11（10.4 Ma）的沉积环境。对比冰川间冰期条件和物源的特点是粘土矿物和地球化学（元素和同位素）代理沿着粒度。间冰期环境被解释为海冰为主，与前全新世沉积物主要从东西伯利亚楚科奇-阿拉斯加边缘。与最近的情况相比，这种模式表明，一个更强的跨极漂移扩大到加拿大盆地的代价是博福特环流，或更强的沿大陆架电流。MIS 4之前的冰期主要是北美的碳质或陆源源岩。以钙峰为标志的碳质输入被追踪到加拿大北极群岛西部的劳伦泰德冰盖（LIS）侵蚀。陆源物质（锆峰值）可能与受因纽特冰盖和/或LIS麦肯齐冰流影响的地区有关。MIS 4和2间隔具有不同的组成与西伯利亚/楚科奇，而不是北美种源。冰川间隔中的粒度显示出更强的风选作用，这意味着更强的中层环流。研究结果为模拟北冰洋西部古环流和冰川作用提供了新的边界条件。
Sediment cores from the Northwind Ridge north of the Arctic Chukchi-Alaskan margin were analyzed for a suite of stratigraphic and provenance proxies. Based on the correlation to previously studied regional records, cores under study present sedimentary environments of Marine Isotope Stages (MIS) 1–11 (∼0.4 Ma) on millennial time scales. Contrasting glacial-interglacial conditions and provenance were characterized by means of clay-mineral and geochemical (elemental and isotopic) proxies along with grain size. Interglacial environments are interpreted as sea-ice dominated, with pre-Holocene sediment transported mostly from the East Siberian to Chukchi-Alaskan margin. In comparison with the recent conditions, this pattern suggests a stronger Transpolar Drift expanding into the Canada Basin at the expense of the Beaufort Gyre, or stronger along-shelf currents. Glacial intervals prior to MIS4 have a predominantly North American signature with carbonaceous or terrigenous source rocks. Carbonaceous inputs marked by Ca peaks are tracked to the western Canadian Arctic Archipelago eroded by the Laurentide Ice Sheet (LIS). Terrigenous sources (Zr peaks) are likely related to areas impacted by the Innuitian Ice Sheet and/or the LIS Mackenzie ice stream. MIS 4 and 2 intervals have a different composition with the Siberian/Chukchi rather than North American provenance. A stronger winnowing indicated by grain size in the glacial intervals suggests a stronger mid-depth circulation. Study results provide new boundary conditions for modeling paleocirculation and glaciations in the western Arctic Ocean.
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影响因子：
1.9
作者：
K. Lazar;L. Polyak
通讯作者：
K. Lazar;L. Polyak
DOI：
--
发表时间：
2016-06
期刊：
--
影响因子：
--
作者：
H. Zou
通讯作者：
H. Zou
影响因子：
1.9
作者：
D. Darby;Paula Zimmerman
通讯作者：
D. Darby;Paula Zimmerman
冰的同位素指纹——筏状碎片为中晚第四纪北极环流和冰川历史提供了新的约束
DOI：
10.1029/2020gc009019
发表时间：
2020-08
期刊：
Geochemistry, Geophysics, Geosystems
影响因子：
--
作者：
Linsen Dong;Leonid Polyak;Yanguang Liu;Xuefa Shi;Jun Zhang;Yuanhui Huang
通讯作者：
Yuanhui Huang
影响因子：
16.6
作者：
Jakobsson M;Nilsson J;Anderson L;Backman J;Björk G;Cronin TM;Kirchner N;Koshurnikov A;Mayer L;Noormets R;O'Regan M;Stranne C;Ananiev R;Barrientos Macho N;Cherniykh D;Coxall H;Eriksson B;Flodén T;Gemery L;Gustafsson Ö;Jerram K;Johansson C;Khortov A;Mohammad R;Semiletov I
通讯作者：
Semiletov I