Dataset Information

Tang, Dongjie; ORCID: 0000-0002-0075-6671
Fu, Xuewu
Shi, Xiaoying
Zhou, Limin
Zheng, Wang
Li, Chao
Xu, Dongtao
Zhou, Xiqiang
Xie, Baozeng
Jiang, Ganqing

The mid-Proterozoic (~1.8–0.8 Ga) is characterized by low atmospheric oxygen and pervasive oceanic anoxia, with transient oxygenations. One of the prominent oxygenation events happened at ~1.57 Ga, during which atmospheric O2 may have reached ≥4% present atmospheric level (PAL) and thus promoted the evolution of multi-cellular eukaryotes. The causes for this oxygenation event, however, remained unknown. Here, we report the result of δ202Hg and ∆199Hg, P concentration, Rb/Al, and Nd(t) across this oxygenation interval in the Gaoyuzhuang Formation of North China. The positive δ202Hg, Nd(t), and negative Δ199Hg shifts, and the accompanied peaks in Rb/Al, P and I/(Ca+Mg) suggest that this oxygenation was likely resulted from enhanced weathering of intermediate to mafic rocks, which may have promoted primary production via increasing P influx to the ocean and led to the rise in oxygen levels. The data indicate that enhanced weathering input can trigger transient oxygenation events during the mid-Proterozoic.

Tang, D., Fu, X., Shi, X., Zhou, L., Zheng, W., Li, C., Xu, D., Zhou, X., Xie, B., Jiang, G., 2022. Enhanced weathering triggered the transient oxygenation event at ~1.57 Ga, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). https://doi.org/10.26022/IEDA/112274. Accessed 2024-07-26.

2022-04-27

Creative Commons Attribution-ShareAlike 4.0 International [CC-BY-SA-4.0]

Coverage Scope: Regional (Continents, Oceans)

Mid-Proterozoic; Gaoyuzhuang Formation; North China; Hg isotope; weathering; primary productivity

2022-04-28

Dataset