Iron isotopes in the Amazon River system: Weathering and transport signatures
Trace metal clean plankton tows, river samples, aerosol leachates, and porewater samples from the Amazon River system were measured for their iron isotopic composition. The overall isotopic range observed was 1.5‰ with Fe isotopic variability observed between different types of tributaries. Dissolve...
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| Veröffentlicht in: | Earth and planetary science letters 2006-08, Vol.248 (1), p.54-68 |
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| creator | Bergquist, B.A. Boyle, E.A. |
| description | Trace metal clean plankton tows, river samples, aerosol leachates, and porewater samples from the Amazon River system were measured for their iron isotopic composition. The overall isotopic range observed was 1.5‰ with Fe isotopic variability observed between different types of tributaries. Dissolved Fe and suspended load Fe from two main channel sites were isotopically similar (≈ −
0.1 to −
0.3‰). In contrast, the dissolved Fe and suspended load Fe from an organic rich tributary, the Negro River, were isotopically distinct with the dissolved slightly isotopically heavy (+
0.3‰) and the suspended load isotopically light (−
0.9‰). The isotopically lightest sample from the Amazon region was shelf porewater (−
1.3‰). In river water–seawater mixing experiments, the Fe isotopic signal of dissolved Fe of river water was modified by flocculation of isotopically heavy Fe. The variability of the Fe isotopic composition of natural samples including biological and aqueous samples demonstrates that significant fractionation is associated with Fe biogeochemistry in the environment. |
| doi_str_mv | 10.1016/j.epsl.2006.05.004 |
| format | Article |
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0.1 to −
0.3‰). In contrast, the dissolved Fe and suspended load Fe from an organic rich tributary, the Negro River, were isotopically distinct with the dissolved slightly isotopically heavy (+
0.3‰) and the suspended load isotopically light (−
0.9‰). The isotopically lightest sample from the Amazon region was shelf porewater (−
1.3‰). In river water–seawater mixing experiments, the Fe isotopic signal of dissolved Fe of river water was modified by flocculation of isotopically heavy Fe. The variability of the Fe isotopic composition of natural samples including biological and aqueous samples demonstrates that significant fractionation is associated with Fe biogeochemistry in the environment.</description><identifier>ISSN: 0012-821X</identifier><identifier>EISSN: 1385-013X</identifier><identifier>DOI: 10.1016/j.epsl.2006.05.004</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Freshwater ; iron ; iron isotopes ; plankton tows ; porewaters ; river water–seawater mixing experiments ; rivers ; weathering</subject><ispartof>Earth and planetary science letters, 2006-08, Vol.248 (1), p.54-68</ispartof><rights>2006 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a420t-ccba418efba042e642f3cd078d5d3be214e2a881fdc4aecf9cfa92e76914b3523</citedby><cites>FETCH-LOGICAL-a420t-ccba418efba042e642f3cd078d5d3be214e2a881fdc4aecf9cfa92e76914b3523</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.epsl.2006.05.004$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Bergquist, B.A.</creatorcontrib><creatorcontrib>Boyle, E.A.</creatorcontrib><title>Iron isotopes in the Amazon River system: Weathering and transport signatures</title><title>Earth and planetary science letters</title><description>Trace metal clean plankton tows, river samples, aerosol leachates, and porewater samples from the Amazon River system were measured for their iron isotopic composition. The overall isotopic range observed was 1.5‰ with Fe isotopic variability observed between different types of tributaries. Dissolved Fe and suspended load Fe from two main channel sites were isotopically similar (≈ −
0.1 to −
0.3‰). In contrast, the dissolved Fe and suspended load Fe from an organic rich tributary, the Negro River, were isotopically distinct with the dissolved slightly isotopically heavy (+
0.3‰) and the suspended load isotopically light (−
0.9‰). The isotopically lightest sample from the Amazon region was shelf porewater (−
1.3‰). In river water–seawater mixing experiments, the Fe isotopic signal of dissolved Fe of river water was modified by flocculation of isotopically heavy Fe. The variability of the Fe isotopic composition of natural samples including biological and aqueous samples demonstrates that significant fractionation is associated with Fe biogeochemistry in the environment.</description><subject>Freshwater</subject><subject>iron</subject><subject>iron isotopes</subject><subject>plankton tows</subject><subject>porewaters</subject><subject>river water–seawater mixing experiments</subject><subject>rivers</subject><subject>weathering</subject><issn>0012-821X</issn><issn>1385-013X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKt_wFNO3nadZL_FSyl-FCqCKPYWstnZmtL9MJMW6q93l3r2NPDO8w7Mw9i1gFCASG83Ifa0DSVAGkISAsQnbCKiPAlARKtTNgEQMsilWJ2zC6INDGCSFhP2snBdyy11vuuRuG25_0I-a_TPEL_ZPTpOB_LY3PFP1MPO2XbNdVtx73RLfec8J7tutd85pEt2Vust4dXfnLKPx4f3-XOwfH1azGfLQMcSfGBMqWORY11qiCWmsawjU0GWV0kVlShFjFLnuagrE2s0dWFqXUjM0kLEZZTIaMpujnd7133vkLxqLBncbnWL3Y6UhKIosmwE5RE0riNyWKve2Ua7gxKgRnNqo0ZzajSnIFGDuaF0fyzh8MLeolNkLLYGK-vQeFV19r_6L2CVeVI</recordid><startdate>20060815</startdate><enddate>20060815</enddate><creator>Bergquist, B.A.</creator><creator>Boyle, E.A.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>20060815</creationdate><title>Iron isotopes in the Amazon River system: Weathering and transport signatures</title><author>Bergquist, B.A. ; Boyle, E.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a420t-ccba418efba042e642f3cd078d5d3be214e2a881fdc4aecf9cfa92e76914b3523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Freshwater</topic><topic>iron</topic><topic>iron isotopes</topic><topic>plankton tows</topic><topic>porewaters</topic><topic>river water–seawater mixing experiments</topic><topic>rivers</topic><topic>weathering</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bergquist, B.A.</creatorcontrib><creatorcontrib>Boyle, E.A.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Earth and planetary science letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bergquist, B.A.</au><au>Boyle, E.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Iron isotopes in the Amazon River system: Weathering and transport signatures</atitle><jtitle>Earth and planetary science letters</jtitle><date>2006-08-15</date><risdate>2006</risdate><volume>248</volume><issue>1</issue><spage>54</spage><epage>68</epage><pages>54-68</pages><issn>0012-821X</issn><eissn>1385-013X</eissn><abstract>Trace metal clean plankton tows, river samples, aerosol leachates, and porewater samples from the Amazon River system were measured for their iron isotopic composition. The overall isotopic range observed was 1.5‰ with Fe isotopic variability observed between different types of tributaries. Dissolved Fe and suspended load Fe from two main channel sites were isotopically similar (≈ −
0.1 to −
0.3‰). In contrast, the dissolved Fe and suspended load Fe from an organic rich tributary, the Negro River, were isotopically distinct with the dissolved slightly isotopically heavy (+
0.3‰) and the suspended load isotopically light (−
0.9‰). The isotopically lightest sample from the Amazon region was shelf porewater (−
1.3‰). In river water–seawater mixing experiments, the Fe isotopic signal of dissolved Fe of river water was modified by flocculation of isotopically heavy Fe. The variability of the Fe isotopic composition of natural samples including biological and aqueous samples demonstrates that significant fractionation is associated with Fe biogeochemistry in the environment.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.epsl.2006.05.004</doi><tpages>15</tpages></addata></record> |
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| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Freshwater iron iron isotopes plankton tows porewaters river water–seawater mixing experiments rivers weathering |
| title | Iron isotopes in the Amazon River system: Weathering and transport signatures |
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