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| Main Authors: | , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2026
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| Online Access: | https://doi.org/10.1594/PANGAEA.991015 |
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| _version_ | 1867171057399496704 |
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| author | Chu, Yongzhi Li, Xiaohu Xie, Ruifang C Conway, Tim M Xu, Antao Dong, Yanhui |
| author_facet | Chu, Yongzhi Li, Xiaohu Xie, Ruifang C Conway, Tim M Xu, Antao Dong, Yanhui |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Iron (Fe) is a key micronutrient regulating marine productivity and the global carbon cycle, yet reconstructing the relative contributions of different Fe sources through time remains challenging. Here we present high-resolution iron isotopic compositions (δ56Fe), measured by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS), from a Fe-Mn crust sample (CXD31) recovered from the North Pacific Ocean, spanning the past ~23 Myr. The Fe isotopic values vary within the range of modern marine Fe sources, reflecting dynamic mixing among atmospheric dust, sedimentary inputs, and hydrothermal contributions. Using isotope mass-balance calculations, we reconstruct temporal changes in the relative importance of these Fe sources since the Miocene. Three intervals characterized by elevated δ56Fe values (~16.9, ~11.6, and ~2.7 Ma) indicate enhanced inputs of isotopically heavy Fe, which we attribute to increased aeolian dust supply linked to progressive aridification of inland Asia. These Fe isotope data provide a long-term record of Fe source variability in the North Pacific and offer new constraints on the coupling between continental climate evolution and oceanic Fe cycling. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_991015 |
| institution | PANGAEA |
| language | en |
| publishDate | 2026 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Measured iron isotopic compositions of Fe-Mn crust sample CXD31 Chu, Yongzhi Li, Xiaohu Xie, Ruifang C Conway, Tim M Xu, Antao Dong, Yanhui Aeolian dust; Age; CXD31; Dredge, rock; DRG_R; DY105-12/14_CXD31; Ferromanganese crust; Iron biogeochemsitry; Isotopic fingerprinting; Marine geochemistry; Multiple-collector inductively coupled plasma mass spectrometer (MC-ICPMS); North Pacific; δ56Fe; δ56Fe, standard deviation Iron (Fe) is a key micronutrient regulating marine productivity and the global carbon cycle, yet reconstructing the relative contributions of different Fe sources through time remains challenging. Here we present high-resolution iron isotopic compositions (δ56Fe), measured by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS), from a Fe-Mn crust sample (CXD31) recovered from the North Pacific Ocean, spanning the past ~23 Myr. The Fe isotopic values vary within the range of modern marine Fe sources, reflecting dynamic mixing among atmospheric dust, sedimentary inputs, and hydrothermal contributions. Using isotope mass-balance calculations, we reconstruct temporal changes in the relative importance of these Fe sources since the Miocene. Three intervals characterized by elevated δ56Fe values (~16.9, ~11.6, and ~2.7 Ma) indicate enhanced inputs of isotopically heavy Fe, which we attribute to increased aeolian dust supply linked to progressive aridification of inland Asia. These Fe isotope data provide a long-term record of Fe source variability in the North Pacific and offer new constraints on the coupling between continental climate evolution and oceanic Fe cycling. |
| title | Measured iron isotopic compositions of Fe-Mn crust sample CXD31 |
| topic | Aeolian dust; Age; CXD31; Dredge, rock; DRG_R; DY105-12/14_CXD31; Ferromanganese crust; Iron biogeochemsitry; Isotopic fingerprinting; Marine geochemistry; Multiple-collector inductively coupled plasma mass spectrometer (MC-ICPMS); North Pacific; δ56Fe; δ56Fe, standard deviation |
| url | https://doi.org/10.1594/PANGAEA.991015 |