垂死冰川的沉积学死亡面具

IF 1.9 3区 地球科学 Q1 GEOLOGY
Daniel Paul Le Heron, Christoph Kettler, Arian Wawra, Martin Schöpfer, Bernhard Grasemann
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引用次数: 2

摘要

帕斯特泽冰川是奥地利最大的冰川,它正在经历快速的下沉和退缩。近年来产生了一系列复杂的沉积矿床,迄今为止尚未对其进行研究,但为即将消亡的山谷冰川的相分布提供了极好的经验教训。本文于2021年7月为该冰川绘制了一张新的冰川-地貌-地质图。新暴露的(自2018年以来)犁和槽构成了冰下沉积物-地貌组合。冰缘沉积物-地貌组合包括融水溪流、三角洲系统和前冰湖阶地沉积物。同时,冰上组合包括消融揭示的古英相河道沉积,以及碎屑带、落石沉积和冰上河道沉积。总的来说,这些沉积物-地貌组合构成了正在消亡的冰川景观系统的组成部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The sedimentological death mask of a dying glacier

The sedimentological death mask of a dying glacier

The Pasterze is Austria's largest glacier, and it is experiencing rapid downwasting and retreat. A mosaic of complex sedimentary deposits has been produced in recent years which have not hitherto been studied, yet provide excellent lessons into the facies distribution expected from a dying valley glacier. In this paper, a new glaciological–geomorphological–geological map is presented for the glacier in July 2021. Freshly exposed (since 2018) tills and flutes constitute a subglacial sediment–landform assemblage. An ice-marginal sediment–landform assemblage comprises meltwater streams, a delta system and proglacial lake terrace deposits. The supraglacial assemblage, meanwhile, includes fossil englacial channel deposits revealed by ablation, together with debris bands, rockfall deposits and supraglacial channel deposits. Collectively, these sediment–landform assemblages constitute the building blocks of a dying glacier landsystem.

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来源期刊
CiteScore
4.10
自引率
16.70%
发文量
42
审稿时长
16 weeks
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