Sediment provenance of late Quaternary morainic, fluvial and loess‐like deposits in the southwestern Verkhoyansk Mountains (eastern Siberia) and implications for regional palaeoenvironmental reconstructions
Sediment provenance of late Quaternary morainic, fluvial and loess‐like deposits in the southwestern Verkhoyansk Mountains (eastern Siberia) and implications for regional palaeoenvironmental reconstructions
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维尔霍扬斯克山脉西南部（西伯利亚东部）晚第四纪冰碛、河流和黄土类沉积物的沉积物来源及其对区域古环境重建的影响
DOI：
10.1002/gj.1088
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发表时间：
2007
影响因子：
1.8
通讯作者：
B. Diekmann
中科院分区：
文献类型：
--
作者：
S. Popp;I. Belolyubsky;F. Lehmkuhl;A. Prokopiev;C. Siegert;V. Spektor;G. Stauch;B. Diekmann
采用重矿物分析和粘土矿物学分析方法，对雅库特中部阿尔丹河和勒拿河支流晚第四纪沉积物进行了物源分析。聚类分析显示，一个组合的特征是角闪石、斜方辉石、石榴石以及成壤粘土矿物的比例相对较高，反映了来自勒拿河和阿尔丹河广泛集水区的沉积物源。相比之下，其他三个簇主要是稳定的重矿物，具有不同数量的单斜辉石、磷灰石和石榴石，以及指示Verkhoyansk山脉源岩的高比例伊利石和绿泥石。冰川冰川揭示了当地的山源信号，而在最古老的冰川中，Lena-Aldan信号通过重新加工过程被覆盖了。Verkhoyansk前陆的冲积沉积在中更新世和晚更新世之间显示出明显的Lena源信号，与当时更接近山脉的溪流有关。类黄土盖层沉积物的特征是以Lena物源为主，当地山源向山谷方向的比例不断增加。30 ka~10 ka BP山缘冲积阶地段中的风成砂反映了来自雷纳平原的风成物质暂时占主导地位。版权所有©2007 John Wiley&Sons，Ltd.
A provenance analysis of late Quaternary deposits from tributaries of the Aldan and Lena rivers in Central Yakutia (eastern Siberia) was carried out using analysis of heavy minerals and clay mineralogy. Cluster analysis revealed one assemblage that is characterized by relatively high proportions of amphibole, orthopyroxene and garnet as well as pedogenic clay minerals, reflecting a sediment provenance from the wide catchment area of the Lena and Aldan rivers. In contrast, the three other clusters are dominated by stable heavy minerals with varying amounts of clinopyroxene, apatite and garnet, as well as high percentages of illite and chlorite that are indicative of source rocks of the Verkhoyansk Mountains. Glacial moraines reveal the local mountain source signal that is overprinted by the Lena‐Aldan signal in the oldest moraines by reworking processes. Alluvial sediments in the Verkhoyansk Foreland show a clear Lena source signal through intervals of the middle and late Pleistocene, related to a stream course closer to the mountains at that time. Loess‐like cover sediments are characterized by the dominant Lena provenance with increasing proportions of local mountain sources towards the mountain valleys. Aeolian sands in an alluvial terrace section at the mountain margin covering the time between 30 ka and 10 ka BP reflect temporarily dominant inputs of aeolian materials from the Lena Plains. Copyright © 2007 John Wiley & Sons, Ltd.