globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2017.12.017
Scopus记录号: 2-s2.0-85039858467
论文题名:
Tracking paraglacial sediment with cosmogenic 10Be using an example from the northwest Scottish Highlands
作者: Fame M.L.; Owen L.A.; Spotila J.A.; Dortch J.M.; Caffee M.W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 182
起始页码: 20
结束页码: 36
语种: 英语
Scopus关键词: Atoms ; Budget control ; Catchments ; Deposits ; Glacial geology ; Runoff ; Sediments ; Silica ; Deglaciations ; Glacial erosion ; Glacial sediments ; Late quaternary ; Remobilization ; Sediment budgets ; Sediment sources ; Vertical mixing ; Surficial sediments ; bedrock ; beryllium isotope ; comparative study ; concentration (composition) ; deglaciation ; glacial deposit ; glacial erosion ; glacial sedimentation ; Quaternary ; remobilization ; tracking ; vertical mixing ; Highland ; Scotland ; United Kingdom
英文摘要: Beryllium-10 concentrations in samples of sediment and bedrock from five study sites across the Scottish Highlands trace paraglacial sediment sources and define the nature of glacial erosion for the late Quaternary. Exposure ages derived from 10Be concentrations in ridge and lower elevation bedrock range from 10 to 33 ka, which suggest that polythermal ice and warm based ice were primarily responsible for producing glacial sediment. Comparisons of 10Be concentrations between catchment-wide sediment (2.06 ± 0.34 × 104 to 11.24 ± 1.54 × 104 atoms g−1 SiO2; n = 33), near surface deposits (2.71 ± 0.33 × 104 to 3.48 ± 0.49 × 104 atoms g−1 SiO2; n = 6), 4-m-thick deep till (0.68 × 104 10Be atoms g−1 SiO2; n = 1), ridge bedrock (8.93 ± 0.47 × 104 to 34.05 ± 1.66 × 104 atoms g−1 SiO2; n = 20), and lower elevation polished bedrock (6.74 ± 0.67 × 104 to 12.65 ± 0.7 × 104 atoms g−1 SiO2, n = 5) indicate that most sand fluxing through catchments in the Scottish Highlands is sourced from the remobilization and vertical mixing of near surface deposits. These findings indicate that glaciogenic material continues to dominate paraglacial sediment budgets more than 11 ka after deglaciation. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112302
Appears in Collections:气候减缓与适应

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作者单位: Department of Geosciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24060, United States; Department of Geology, University of Cincinnati, Cincinnati, OH 45221, United States; Kentucky Geological Survey, University of Kentucky, 228 Mining and Mineral Resources Bldg., Lexington, KY 40506, United States; Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907, United States; Department of Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907, United States

Recommended Citation:
Fame M.L.,Owen L.A.,Spotila J.A.,et al. Tracking paraglacial sediment with cosmogenic 10Be using an example from the northwest Scottish Highlands[J]. Quaternary Science Reviews,2018-01-01,182
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