含砾石和岩屑包裹体的Yedoma沉积物:特征和成因

IF 3 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL
Y. Vasil'chuk
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引用次数: 0

摘要

在西伯利亚、阿拉斯加和加拿大北部的永久冻土平原河谷、海岸和湖岸的露头中,通常可以观察到具有大型同生冰楔(IW)的叶多马冰复合体沉积物。它们发生在东西伯利亚的山区和山麓地区的频率较低,例如上科莱马高地、东萨扬山脉和阿纳巴尔高原的河谷,以及阿拉斯加和育空地区。介绍了作者在山间盆地、山坡、海岸和湖岸研究含IW的砾石叶多玛的材料。所获得的数据可以得出这样的结论:砾石Yedoma主要来源于冲积、湖泊和崩积,风成过程的参与程度很低。晚更新世砾质矿床的出现证实了叶多马的多成因假说。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Yedoma sediments with gravel and rock debris inclusions: Characteristics and origin
Yedoma ice complex sediments with large syngenetic ice wedges (IW) are usually observed in outcrops in river valleys on permafrost plains and on sea coasts and lake shores in the north of Siberia, Alaska, and Canada. Less frequently, they occur in mountainous and foothill regions of East Siberia, for example, in the Upper Kolyma Upland and in river valleys of the Eastern Sayan Range and the Anabar Plateau, as well as in Alaska and Yukon. The author's materials on gravelly Yedoma with IWs in the intermountain basins, on mountain slopes, and on sea coasts and lake shores are presented. The obtained data allow a conclusion that gravelly Yedoma has mainly alluvial, lacustrine, and colluvial origins with an insignificant participation of aeolian processes. Occurrence of the late Pleistocene gravelly deposits with large syngenetic IWs confirms a hypothesis of polygenetic origin of Yedoma.
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来源期刊
CiteScore
9.70
自引率
8.00%
发文量
43
审稿时长
>12 weeks
期刊介绍: Permafrost and Periglacial Processes is an international journal dedicated to the rapid publication of scientific and technical papers concerned with earth surface cryogenic processes, landforms and sediments present in a variety of (Sub) Arctic, Antarctic and High Mountain environments. It provides an efficient vehicle of communication amongst those with an interest in the cold, non-glacial geosciences. The focus is on (1) original research based on geomorphological, hydrological, sedimentological, geotechnical and engineering aspects of these areas and (2) original research carried out upon relict features where the objective has been to reconstruct the nature of the processes and/or palaeoenvironments which gave rise to these features, as opposed to purely stratigraphical considerations. The journal also publishes short communications, reviews, discussions and book reviews. The high scientific standard, interdisciplinary character and worldwide representation of PPP are maintained by regional editorial support and a rigorous refereeing system.
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