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Variations in clay mineral composition in the western Arctic Ocean since the mid-Pleistocene: Implications on changes in circulation and ice sheet development
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Renhui Xu1, Rujian Wang1, *, Wenshen Xiao1, Linsen Dong2, Yanguang Liu2
Haiyang Xuebao | 2020, 42(9) : 50 - 60
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Haiyang Xuebao | 2020, 42(9): 50-60
• Marine Geology •
Variations in clay mineral composition in the western Arctic Ocean since the mid-Pleistocene: Implications on changes in circulation and ice sheet development
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Renhui Xu1, Rujian Wang1, *, Wenshen Xiao1, Linsen Dong2, Yanguang Liu2
Affiliations
  • 1 State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
  • 2 First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Published: 2020-09-25 doi: 10.3969/j.issn.0253-4193.2020.09.006
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In this study, we investigated clay mineral assemblages together with other provenance indicators of Core ARC7-LIC retrieved from the southern Alpha Ridge, in order to reveal the changes in sediment deposition, ocean circulation in the western Arctic Ocean, and the development of surrounding ice sheet through the mid-late Pleistocene (～MIS 29). Changes in clay mineral composition in Core ARC7-LIC suggest a transition of Siberian sourced material during MIS 29−13 towards a North American sourced material during MIS 12−1. This transition reflects the change of the circulation in the western Arctic Ocean before and after the Mid-Brunhes Event, which features an amplification of glacial-interglacial cycles in the post Mid-Brunhes Event. An exceptionally high smectite peak characterizes MIS 12, which is inferred to be from North American source. Laurentide ice sheet discharges icebergs and fine material in the western Arctic Ocean since MIS 16. The amplitude of ice sheet growth and decay increases since MIS 12. During MIS 6, 4 and 3, the asynchronous variations of Ca/Al and kaolinite suggest heterogeneous development of Laurentide ice sheet on the Canadian Arctic Archipelago and Alaska-Mackenzie sides.

western Arctic Ocean  /  clay mineral  /  provenance  /  Beaufort Gyre  /  Transpolar Drift  /  Arctic ice sheet
Renhui Xu, Rujian Wang, Wenshen Xiao, Linsen Dong, Yanguang Liu. Variations in clay mineral composition in the western Arctic Ocean since the mid-Pleistocene: Implications on changes in circulation and ice sheet development[J]. Haiyang Xuebao, 2020 , 42 (9) : 50 -60 . DOI: 10.3969/j.issn.0253-4193.2020.09.006
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Article Info
doi: 10.3969/j.issn.0253-4193.2020.09.006
  • Receive Date：2019-12-21
  • Online Date：2026-03-27
  • Published：2020-09-25
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  • Received：2019-12-21
  • Revised：2020-03-27
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    1 State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
    2 First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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