Provenance changes between recent and glacial-time sediments in the Amundsen Sea embayment, West Antarctica: clay mineral assemblage evidence
Provenance changes between recent and glacial-time sediments in the Amundsen Sea embayment, West Antarctica: clay mineral assemblage evidence
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南极洲西部阿蒙森海海湾近期沉积物和冰期沉积物之间的物源变化：粘土矿物组合证据
DOI：
10.1017/s0954102011000320
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发表时间：
2011
影响因子：
1.6
通讯作者：
Larter
中科院分区：
文献类型：
--
作者：
Ehrmann;Hillenbrand;Graham;Larter
阿蒙森海湾是未来西南极冰盖崩溃的可能起点。本文有助于更好地了解目前和末次冰期冰下沉积物进入该海湾的运输途径。它讨论了从海底表层和海洋岩心采集的沉积物样品的粘土矿物组成，以解释沉积物来源的时空变化。现今粘土矿物分布中最显著的特征是高岭石的高浓度，主要由思韦茨冰川系统提供，表明内陆地区存在迄今未知的含高岭石沉积地层，可能在伯德冰下盆地。伊利石的主要输入是通过松岛冰川。蒙皂石来源于埃尔斯沃思地和玛丽伯德地西部火山岩的侵蚀。末次冰期沉积的杂岩中的粘土矿物组合与相应的表层沉积物中的粘土矿物组合明显不同。这种关系表明，冰川沉积物的来源与现代不同，这可能反映了冰川和冰流的汇水面积的变化。
The Amundsen Sea embayment is a probable site for the initiation of a future collapse of the West Antarctic Ice Sheet. This paper contributes to a better understanding of the transport pathways of subglacial sediments into this embayment at present and during the last glacial period. It discusses the clay mineral composition of sediment samples taken from the seafloor surface and marine cores in order to decipher spatial and temporal changes in the sediment provenance. The most striking feature in the present-day clay mineral distribution is the high concentration of kaolinite, which is mainly supplied by the Thwaites Glacier system and indicates the presence of hitherto unknown kaolinite-bearing sedimentary strata in the hinterland, probably in the Byrd Subglacial Basin. The main illite input is via the Pine Island Glacier. Smectite originates from the erosion of volcanic rocks in Ellsworth Land and western Marie Byrd Land. The clay mineral assemblages in diamictons deposited during the last glacial period are distinctly different from those in corresponding surface sediments. This relationship indicates that glacial sediment sources were different from modern ones, which could reflect changes in the catchment areas of the glaciers and ice streams.
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影响因子：
4
作者：
Lowe, AL;Anderson, JB
通讯作者：
Anderson, JB
影响因子：
18.3
作者：
Rignot, Eric;Bamber, Jonathan L.;Van Meijgaard, Erik
通讯作者：
Van Meijgaard, Erik
全新世冰从东南极洲拉扎列夫海架退缩
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
F. Gingele;G. Kuhn;Bertram Maus;M. Melles;T. Schöne
通讯作者：
T. Schöne
南极伯德冰下盆地最佳地震拍摄记录参数及初步地壳模型
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
T. S. Clarke;P. D. Burkholder;S. Smithson;C. Bentley
通讯作者：
C. Bentley
影响因子：
5.2
作者：
Studinger, M;Bell, RE;Joughin, I
通讯作者：
Joughin, I