Constraining multi-stage exposure-burial scenarios for boulders preserved beneath cold-based glacial ice in Thule, northwest Greenland
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- 作者：Lee B. Corbetta ; Ashley.Corbett@uvm.edu" class="auth_mail" title="E-mail the corresponding author ; Paul R. Biermana ; Dylan H. Roodb ; c
- 关键词：geochronology ; cosmogenic nuclides ; polar regions ; cold-based ice ; till recycling ; Quaternary
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 April 2016
- 年：2016
- 卷：440
- 期：Complete
- 页码：147-157
- 全文大小：1871 K
文摘
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We conducted cosmogenic 26Al/10Be analysis of boulders from Thule, NW Greenland.
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We utilized numerical models to constrain exposure/burial scenarios and uncertainty.
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Most of the boulders have been preserved beneath cold-based, non-erosive ice.
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Some boulders were exposed during Marine Isotope Stages 5e and 1.
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Other boulders have longer, more complex histories spanning hundreds of ky.