Environmental conditions for the presence of magnetofossils in the Last Glacial Maximum inferred from magnetic parameters of sediments from the Ulleung Basin, East Sea

Suk, Dongwoo

doi:10.1016/j.margeo.2015.12.009

Cited by 3 publications

(1 citation statement)

References 92 publications

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“…Magnetofossils in ideal magnetic SD sizes have been detected commonly in marine sediments during warm stages (Chang et al., 2012). The abundance of magnetofossils depends mainly on their production and preservation, which are sensitive to the paleoenvironment and can be affected by redox conditions, total organic carbon (TOC), deep‐water ventilation and oxygen solubility (Chang et al., 2018; Kopp et al., 2007; Roberts et al., 2011; Snowball et al., 2002; Suk, 2016; Zhang et al., 2021). The bottom oxygen concentration that is affected by changes in TOC and deep‐water ventilation could influence the preservation of magnetofossils (Mathias et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Inverse Magnetic Fabrics Caused by Magnetofossils in the Northwestern South China Sea Since End of the Last Glacial

Wang

Gai

et al. 2022

Geophysical Research Letters

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The relationships among the abundance of magnetofossils, the ensuing magnetic properties, and the controlling paleoenvironmental factors in marine sediments remain broadly unexplored. Here, we identify magnetofossils in core XB1 from the northwestern South China Sea (SCS) since end of the Last Glacial. Using rock magnetic and electron microscopic data, we propose a model that links the anisotropy of magnetic susceptibility fabric and the abundance of magnetofossils. The magnetofossil concentration in sediments increases significantly during the 14.7–4.7 ka period, which in turns leads to inverse magnetic fabrics and near‐horizontal of the minimum magnetic susceptibility axes. Further, we show that the abundance of magnetofossils is linked to paleoenvironmental changes in the northwestern SCS. The production and preservation of magnetofossils during the 14.7–4.7 ka period are promoted by an intensified East Asian summer monsoon and sluggish deep‐water ventilation, while the paucity of magnetofossils after 4.7 ka is attributed to high oxygen content.

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