Onset time and accretionary formation of Mollisols in Northeast China

Yang, Fei; Long, Hao; Gong, Ke; Shi, Yue; Zhang, Jingran; Zhang, Aimin; Yang, Na; Cheng, Peng; Pan, Xumin; Zhang, Gan‐Lin

doi:10.1016/j.scib.2023.08.008

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…Zhang et al, 2022). In addition, a 14 C age of ∼16.9 ka was recently obtained from a piece of charcoal found at the bottom of another Mollisol profile in Northeast China (Yang et al, 2023). As charcoal is a closed system, it provides a more reliable estimation of the time elapsed since the fire event than those from bulk soil (Eckmeier et al, 2007).…”

Section: Reconstructing the Formation Process Of The Mollic Epipedonmentioning

confidence: 99%

Reconstructing Mollisol Formation Processes Through Quantified Pedoturbation

Zhang,

Long,

Yang

et al. 2024

Geophysical Research Letters

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Mollisols are highly fertile soils and function as significant carbon reservoirs. However, determining their ages and formation processes is challenging due to extensive pedoturbation, which undermines conventional dating methods. Here, we employed luminescence, a light‐sensitive property of minerals widely used in geological dating, to investigate and quantify soil mixing. We analyzed over 2,400 luminescence ages of individual K‐feldspar grains from a Mollisol profile in Northeast China, and for the first time, we were able to determine the intensity of pedoturbation in the Mollisol profile over the past 50,000 years. The results showed that the current pedoturbation can penetrate to a depth of approximately 80 cm, with the intensity decreasing with depth. By identifying a significant intensification in historical pedoturbation, we inferred that the paleoenvironment might be suitable for the formation of Mollisols 16,400 years before present.

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Section: Reconstructing the Formation Process Of The Mollic Epipedonmentioning

confidence: 99%