Chu Yongzhi 0000-0002-2549-0670 Shanghai Jiao Tong University https://ror.org/0220qvk04 Li Xiaohu xhli@sio.org.cn Xie Ruifang C 0000-0002-6628-9236 Conway Tim M 0000-0002-3069-9786 Xu Antao axu@geomar.de 0000-0002-5644-0852 Dong Yanhui dongyh@sio.org.cn 2026 In-situ concentrations of iron and aluminium in CXD31 sub-samples dataset https://doi.pangaea.de/10.1594/PANGAEA.991014 2026-04-01T08:48:12 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. 173.2 173.2 19.9 19.9 173.2 19.9 2003-07-19T00:00:00 2003-07-19T00:00:00 -1357.0 -1357.0 National Key Research and Development Program of China https://doi.org/10.13039/501100012166 2023YFC2811205 National Key Research and Development Program of China https://doi.org/10.13039/501100012166 2023YFC2811305 National Natural Science Foundation of China NSFC https://www.nsfc.gov.cn/english/site_1/index.html https://doi.org/10.13039/501100001809 NSFC 42376035 Tracing water column export production and remineralization using Ba and Cd isotopes National Natural Science Foundation of China NSFC https://www.nsfc.gov.cn/english/site_1/index.html https://doi.org/10.13039/501100001809 U2244222 Second Institute of Oceanography, State Oceanic Administration https://doi.org/10.13039/501100013288 SZ2563 DY105-12/14_CXD31 CXD31 19.9 173.2 -1357.0 2003-07-19T00:00:00 Dredge, rock DRG_R Fe–Mn crust collected by rock dredging on a seamount slope 416 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Sample number Sample no Chu Yongzhi 0000-0002-2549-0670 Sample no Age Age Ma age http://purl.obolibrary.org/obo/PATO_0000011 Chu Yongzhi 0000-0002-2549-0670 Age [Ma] Iron Fe % Dimensionless Ratio ψ Electron probe microanalyzer (EPMA), JEOL JXA-iSP100 Chu Yongzhi 0000-0002-2549-0670 wt% Fe [%] Aluminium Al % aluminium Al Dimensionless Ratio ψ Electron probe microanalyzer (EPMA), JEOL JXA-iSP100 Chu Yongzhi 0000-0002-2549-0670 wt% Al [%] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Aeolian dust Ferromanganese crust Iron biogeochemsitry Isotopic fingerprinting Marine geochemistry North Pacific author114755 author114756 author114757 author42120 author74108 author99680 award2367 award4535 award4796 award4797 award4798 curlevel30 event3351155 funder20769 funder20908 funder20961 geocode1599 geocode1600 geocode1601 geocode8128 inst22162 license21 method11544 method18730 param502940 param508750 param75 param77 pi114755 term1073135 term40136 term43794 term43997 term74899 term76524 term77144 term77145 term77146