کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8910552 | 1637503 | 2017 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficacy of in situ and meteoric 10Be mixing in fluvial sediment collected from small catchments in China
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
Basins eroding faster (>Â 100Â mm/kyr) tend to mix better than slowly eroding basins. We find no evidence that agricultural land use in sampled basins affects sediment mixing downstream. Mixing improves with increased basin area (particularly >Â 200Â km2), increased sampling distance downstream from an upstream junction (>Â 500Â m), and increased difference in size between tributaries (one tributary >Â 3 times larger than the other). The most important factor affecting mixing efficacy for both in situ and meteoric 10Be is the fraction of the basin area contributing to the downstream sample that does not contribute to the upstream samples. Junctions with >Â 2% of the basin area unsampled by upstream samples tend not to mix as well. Our data suggest specific sampling location strategies (such as amalgamation) likely to improve the outcome of fluvial network analysis using cosmogenic nuclides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Geology - Volume 471, 5 November 2017, Pages 119-130
Journal: Chemical Geology - Volume 471, 5 November 2017, Pages 119-130
نویسندگان
Thomas B. Neilson, Amanda H. Schmidt, Paul R. Bierman, Dylan H. Rood, Veronica Sosa Gonzalez,