Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074259 |
The competition between coastal trace metal fluxes and oceanic mixing from the Be-10/Be-9 ratio: Implications for sedimentary records | |
Wittmann, H.1; von Blanckenburg, F.1,2; Mohtadi, M.3; Christl, M.4; Bernhardt, A.2 | |
2017-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Switzerland |
英文摘要 | At an ocean margin site 37 degrees S offshore Chile, we use the meteoric cosmogenic Be-10/Be-9 ratio to trace changes in terrestrial particulate composition due to exchange with seawater. We analyzed the marine authigenic phase in surface sediments along a coast-perpendicular transect and compared to samples from their riverine source. We find evidence for growth of authigenic rims through coprecipitation, not via reversible adsorption, that incorporate an open ocean Be-10/Be-9 signature from a deep water source only 30km from the coast, overprinting terrestrial Be-10/Be-9 signatures. Together with increasing Be-10/Be-9 ratios, particulate-bound Fe concentrations increase, which we attribute to release of Fe-rich pore waters during boundary exchange in the sediment. The implications for the use of Be-10/Be-9 in sedimentary records for paleodenudation flux reconstructions are the following: in coast-proximal sites the authigenic record will likely preserve local riverine ratios unaffected by exchange with seawater, whereas sites beneath well-mixed seawater will preserve global flux signatures. |
英文关键词 | meteoric Be-10 Be-9 ratio coastal trace metals oceanic mixing marine sedimentary records paleosediment fluxes boundary exchange |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410658800042 |
WOS关键词 | DIPOLE-MOMENT VARIATION ; COSMOGENIC NUCLIDES ; PACIFIC-OCEAN ; EROSION RATES ; IRON ISOTOPES ; BAY SEDIMENTS ; BERYLLIUM ; TRANSPORT ; EXTRACTION ; CHEMISTRY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26378 |
专题 | 气候变化 |
作者单位 | 1.GFZ German Res Ctr Geosci, Sect Earth Surface Geochem 3 3, Potsdam, Germany; 2.Free Univ Berlin, Dept Geosci, Berlin, Germany; 3.Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany; 4.Swiss Fed Inst Technol, Dept Phys, Lab Ion Beam Phys, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Wittmann, H.,von Blanckenburg, F.,Mohtadi, M.,et al. The competition between coastal trace metal fluxes and oceanic mixing from the Be-10/Be-9 ratio: Implications for sedimentary records[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(16). |
APA | Wittmann, H.,von Blanckenburg, F.,Mohtadi, M.,Christl, M.,&Bernhardt, A..(2017).The competition between coastal trace metal fluxes and oceanic mixing from the Be-10/Be-9 ratio: Implications for sedimentary records.GEOPHYSICAL RESEARCH LETTERS,44(16). |
MLA | Wittmann, H.,et al."The competition between coastal trace metal fluxes and oceanic mixing from the Be-10/Be-9 ratio: Implications for sedimentary records".GEOPHYSICAL RESEARCH LETTERS 44.16(2017). |
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