Sea-ice transport of riverine particles from the Laptev Sea to Fram Strait based on clay mineral studies
Sea-ice transport of riverine particles from the Laptev Sea to Fram Strait based on clay mineral studies
复制标题
DOI：
10.1007/s005310000109
复制
发表时间：
2000-12-01
影响因子：
2.3
通讯作者：
Antonow, M
中科院分区：
文献类型：
--
作者：
Dethleff, D;Rachold, V;Antonow, M
本研究的目的是确定从西伯利亚腹地到拉普捷夫海和进一步到北冰洋的现代沉积物运输的途径和过程。对河流悬浮颗粒物（SPM）、拉普捷夫海陆架表层沉积物和海冰沉积物（SIS）进行了粘土矿物分析。在七次考察中收集的材料包括在这项研究中。粘土矿物组合被用来破译河流沉积物的分布在浅的拉普捷夫海陆架，夹带到新形成的冰的细颗粒，和运输SIS从拉普捷夫海向消融区。聚类分析表明，拉普捷夫海陆架沉积物和SIS的粘土矿物组合主要受卡坦加、Lena等河流SPM输入的控制。还有雅娜·里弗斯而西部大陆架粘土矿物省的特点是由卡坦加河提供的蒙皂石浓度增加，东部拉普捷夫海主要是通过Lena和Yana河排放的伊利石。SIS蒙皂石浓度可作为环北极大陆架沉积物源区的指标。经极漂移可分为两个分支：西伯利亚分支和极地分支，前者来自喀拉海东部，后者来自拉普捷夫海西部。
The aim of this study was to identify pathways and processes of modern sediment transport from the Siberian hinterland to the Laptev Sea and further to the Arctic Ocean. Clay mineral analyses were performed on riverine suspended particulate material (SPM), surface sediments of the Laptev Sea shelf and sea-ice sediments (SIS). Material collected during seven expeditions was included in this study. Clay mineral assemblages are used to decipher the distribution of riverine sediments on the shallow Laptev Sea shelf, the entrainment of fine particles into newly forming ice, and the transport of SIS from the Laptev Sea towards the ablation areas. A cluster analysis of our data set shows that the clay mineral assemblages of Laptev Sea shelf sediments and SIS are controlled mainly by the input of riverine SPM supplied by the Khatanga, Lena. and Yana Rivers. Whereas the western shelf clay-mineral province is characterized by enhanced smectite concentrations supplied by the Khatanga River, the eastern Laptev Sea is dominated by illite discharged through the Lena and Yana Rivers. The SIS smectite concentration serves as an indicator for sediment source areas on the circum-Arctic shelves. Subsequently, the Transpolar Drift can be distinguished into a Siberian Branch fed from the eastern Kara Sea and the western Laptev Sea, and a Polar Branch originating from the eastern Laptev Sea.