Spatial and temporal influence of glaciers and rivers on the sedimentary environment in Sassenfjorden and Tempelfjorden, Spitsbergen
Spatial and temporal influence of glaciers and rivers on the sedimentary environment in Sassenfjorden and Tempelfjorden, Spitsbergen
复制标题
冰川和河流对斯匹次卑尔根岛萨森峡湾和坦佩尔峡湾沉积环境的时空影响
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
K. Yoo
中科院分区：
文献类型：
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作者：
M. Forwick;T. Vorren;M. Hald;S. Korsun;Y. Roh;C. Vogt;K. Yoo
摘要水文、地球化学、有孔虫、岩石学和地球物理等多指标分析揭示了在Weichselian晚期和全新世期间，冰川Tundegenen和von Postbreen以及Sassenelva河对两个斯匹次卑尔根峡湾沉积环境的不同影响。末次冰期期间，研究区域被地面冰覆盖。在最新的Weichselian/最早的全新世，冰川前锋逐步撤退，可能是小的全新世早期。在6~4 cal ka BP之间，Tunnel-kenen出现增长。从C减少Tunnelen的输入。3.7 cal ka BP可能是与海冰形成增强和/或融水径流减少有关的冰山漂流受到抑制的结果。在过去的两千年里，冰川锋前进和后退了几次。最大的全新世冰川范围是在公元1870年冯·波斯特布林（von Postbreen）的激增结束时达到的。现代冰川海洋环境的特征包括：（1）主要沉积物源产生的浊水沃茨颜色和矿物组合不同;（2）由于风的强迫和科里奥利效应，浊水羽流的位置变化;（3）夏季水体分层，年际变化;（4）生产力随距冰川锋距离的增加而增加;（5）典型的冰川近缘环境的有孔虫动物群组合;（6）周期性的物质运输活动。
Abstract Multiproxy analyses including hydrographical, geochemical, foraminferal, lithological and geophysical data reveal variable influences of the glaciers Tunabreen and von Postbreen as well as the river Sassenelva on the sedimentary environment in two Spitsbergen fjords during the Late Weichselian and the Holocene. Grounded ice covered the study area during the last glacial. The glacier fronts retreated stepwise during the latest Weichselian/earliest Holocene, and the glaciers were probably small during the early Holocene. A growth of Tunabreen occurred between 6 and 4 cal ka BP. Reduced input from Tunabreen from c. 3.7 cal ka BP was probably a result of suppressed iceberg rafting related to the enhanced formation of sea ice and/or reduced meltwater runoff. During the past two millennia, the glacier fronts advanced and retreated several times. The maximum Holocene glacier extent was reached at the end of a surge of von Postbreen in AD 1870. Characteristics of the modern glaciomarine environment include: (1) different colours and bulk-mineral assemblages of the turbid waters emanating from the main sediment sources; (2) variable locations of the turbid-water plumes as a consequence of wind forcing and the Coriolis effect; (3) stratified water masses during summers with interannual variations; (4) increasing productivity with increasing distance from the glacier fronts; (5) foraminifera-faunal assemblages typical for glacierproximal settings; and (6) periodical mass-transport activity.
影响因子：
2.3
作者：
F. Nilsen;F. Cottier;R. Skogseth;S. Mattsson
通讯作者：
F. Nilsen;F. Cottier;R. Skogseth;S. Mattsson