Optical dating of sediments affected by post-depositional mixing: Modelling, synthesizing and implications

Peng, Jun; Li, Bo; Jacobs, Zenobia; Gliganic, Luke

doi:10.1016/j.catena.2023.107383

Cited by 3 publications

(1 citation statement)

References 123 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To better understand the structure of soil mixing, the Finite Mixture Model (FMM; Peng et al, 2023;Roberts et al, 2000) was applied to estimate both the number (k) and proportion (p) of age populations, and we introduced a new proxy called k/p max to promote comprehension. Here, p max represents the proportion of the dominant component.…”

Section: Study Area and Methodsmentioning

confidence: 99%

Reconstructing Mollisol Formation Processes Through Quantified Pedoturbation

Zhang,

Long,

Yang

et al. 2024

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Study Area and Methodsmentioning

confidence: 99%