| Ye Liming,Yu Xiaoguo,Zhang Weiyan,Wang Rong. 2020. Ice sheet controls on fine-grained deposition at the southern Mendeleev Ridge since the penultimate interglacial. Acta Oceanologica Sinica, 39(9):86－95 |
| Ice sheet controls on fine-grained deposition at the southern Mendeleev Ridge since the penultimate interglacial |
| 末次间冰期以来门捷列夫洋脊南部冰盖对细颗粒沉积的控制作用 |
| Received:October 15, 2019 |
| DOI：10.1007/s13131-020-1649-2 |
| Key words:Arctic Ocean Mendeleev Ridge East Siberian Ice Sheet clay minerals |
| 中文关键词: 北冰洋 门捷列夫洋脊 东西伯利亚冰盖 粘土矿物 |
| 基金项目:The Chinese Special Project on Arctic Ocean Marine Geology Investigation under contract No. CHINARE 2012-2017-03-02; the National Programme on Global Change and Air-Sea Interaction under contract No. GASI-GEOGE-03; the National Natural Science Foundation of China under contract No. 41106048; the Scientific Research Foundation of the Second Institute of Oceanography, Ministry of Natural Resources, under contract No. 17010261. |
| Author Name | Affiliation | E-mail | | Ye Liming | Key Laboratory of Submarine Geosciences, Ministry of Natural Resources, Hangzhou 310012, China
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | lmye@sio.org.cn | | Yu Xiaoguo | Key Laboratory of Submarine Geosciences, Ministry of Natural Resources, Hangzhou 310012, China
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | | | Zhang Weiyan | Key Laboratory of Submarine Geosciences, Ministry of Natural Resources, Hangzhou 310012, China
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | | | Wang Rong | Key Laboratory of Submarine Geosciences, Ministry of Natural Resources, Hangzhou 310012, China
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | |
|
| Hits: 960 |
| Download times: 662 |
| Abstract: |
| Clay minerals deposited at the southern Mendeleev Ridge in the Arctic Ocean have a unique provenance, which can be used to reconstruct changes in the local sedimentary environment. We show that sediments in core ARC7-E23 record high-frequency changes in clay minerals since the penultimate interglacial. The clay minerals, grain size, and ice-rafted debris indicate the extent of the East Siberia Ice Sheet (ESIS). During the glacial periods of Marine Isotope Stage 2 (MIS2) and MIS4, the southern Mendeleev Ridge was likely covered by an ESIS-extended ice shelf, blocking almost all sediment input from the Canadian Arctic and Laptev Sea, but allowing transport of fine-grained sediments from the East Siberian and Chukchi Sea shelves. After ESIS retreat, the Beaufort Gyre and Transpolar Drift became the primary transport mechanism for the distally sourced sediments. Climate conditions in MIS3 enhanced both the oceanic circulation and sediment transport. |
| 中文摘要: |
| 门捷列夫洋脊南部的粘土矿物沉积具有明确的物源，为追踪该区沉积环境的演变提供了良好的条件。末次间冰期以来，ARC7-E23孔中的粘土矿物记录表现出了非常显著的变化。结合沉积物粒度的端元组份和冰阀碎屑沉积，粘土矿物的变化模式表明，东西伯利亚冰盖(ESIS)的规模可能是控制细颗粒沉积的主要因素。在氧同位素2期(MIS2)和4期(MIS4)，门捷列夫洋脊南部可能被ESIS所覆盖，几乎阻挡了所有来自加拿大和拉夫贴夫海陆架的沉积物，但允许大量来自东西伯利亚海陆架的细粒沉积物输入。只有当ESIS消融后，波弗特环流和越极流的相对强度以及搬运作用才成为了控制远源沉积物输入的主要因素。MIS3期的气候条件似乎最适合远源沉积物的输入，不仅提高了表层环流的流通性，也提供了足够多的搬运介质。 |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
