de.pangaea.dataset991014 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-04-01T08:48:33Z https://doi.pangaea.de/10.1594/PANGAEA.991014 2026-04-01T08:48:12 publication Chu, Yongzhi https://orcid.org/0000-0002-2549-0670 information author Li, Xiaohu

xhli@sio.org.cn

author Xie, Ruifang C https://orcid.org/0000-0002-6628-9236 information author Conway, Tim M https://orcid.org/0000-0002-3069-9786 information author Xu, Antao

axu@geomar.de

https://orcid.org/0000-0002-5644-0852 information author Dong, Yanhui

dongyh@sio.org.cn

author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Iron (Fe) availability in the ocean is strongly influenced by external inputs, including atmospheric deposition, sediment dissolution, and hydrothermal fluxes. To investigate long-term changes in Fe supply, we report in-situ measurements of Fe and aluminium (Al) concentrations from sub-samples of a Fe-Mn crust (CXD31) from the North Pacific Ocean, covering the last ~23 Myr. Iron concentrations exhibit a long-term increasing trend superimposed by several pronounced peaks, while Al concentrations co-vary with Fe during specific intervals, indicating variable terrigenous input. Periods of elevated Fe and Al concentrations at ~16.9, ~11.6, and ~2.7 Ma suggest intensified delivery of lithogenic material to the open ocean. We interpret these peaks as reflecting enhanced atmospheric dust fluxes associated with major phases of Asian inland aridification. The Fe–Al concentration dataset provides an independent geochemical archive for reconstructing variations in external Fe supply and supports a strong link between continental climate evolution and trace metal accumulation in the North Pacific. completed Chu, Yongzhi https://orcid.org/0000-0002-2549-0670 information principalInvestigator Aeolian dust Ferromanganese crust Iron biogeochemsitry Isotopic fingerprinting Marine geochemistry North Pacific theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation 173.2 173.2 19.9 19.9 2003-07-19T00:00:00 2003-07-19T00:00:00 Sample number thematicClassification Age physicalMeasurement Ma Ma Iron physicalMeasurement Electron probe microanalyzer (EPMA), JEOL JXA-iSP100; wt% % % Aluminium physicalMeasurement Electron probe microanalyzer (EPMA), JEOL JXA-iSP100; wt% % % text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.991014?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: DY105-12/14_CXD31 (CXD31) * LATITUDE: 19.900000 * LONGITUDE: 173.200000 * DATE/TIME: 2003-07-19T00:00:00 * ELEVATION: -1357.0 m * METHOD/DEVICE: Dredge, rock Fe–Mn crust collected by rock dredging on a seamount slope 2003-07-19T00:00:00