PANGAEA_991014
In-situ concentrations of iron and aluminium in CXD31 sub-samples
Chu, Yongzhi; Li, Xiaohu; Xie, Ruifang C; Conway, Tim M; Xu, Antao; Dong, Yanhui
In-situ concentrations of iron and aluminium in CXD31 sub-samples
2026-04-01
PANGAEA
Dataset
https://doi.pangaea.de/10.1594/PANGAEA.991014
Investigator
Yongzhi
Chu
Earth Science
Sample number
Age
Iron
Aluminium
geoscientificInformation
Aeolian dust
CXD31
Dredge, rock
DY105-12/14_CXD31
Ferromanganese crust
Iron biogeochemsitry
Isotopic fingerprinting
Marine geochemistry
North Pacific
Electron probe microanalyzer (EPMA), JEOL JXA-iSP100
2003-07-19
2003-07-19
Complete
19.9
19.9
173.2
173.2
unrestricted
CC-BY-4.0: Creative Commons Attribution 4.0 International
English
PANGAEA
Data Publisher for Earth & Environmental Science
https://www.pangaea.de/
Data Center Contact
Michael
Diepenbroek
info@pangaea.de
Leobener Str.
Bremen
Bremen
28359
Germany
online
416 data points
text/tab-separated-values
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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.991014"!
DIF
9.4
2026-04-01
2026-04-01