Quantifying paleoprecipitation of the Luochuan and Sanmenxia Loess on the Chinese Loess Plateau

Liu, Zhifeng; Wei, Gangjian; Wang, Xisheng; Jin, Chunsheng; Liu, Qingsong

doi:10.1016/j.palaeo.2016.06.034

Cited by 14 publications

(12 citation statements)

References 53 publications

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“…The observed differences between the degree of magnetic enhancement of Paks and the CLP may relate to differences in the prevailing pedogenic environment. An overview of paleoclimatic components, such as paleoprecipitation, reveals significant differences, and these in turn may have an influence on pedogenesis (Panaiotu et al, ; Sartori et al, ; Bradák et al, ; Liu et al, , and references therein). As expected, interglacials of both the CLP and the ELB are characterized by significantly higher precipitation than the glacials.…”

Section: Discussionmentioning

confidence: 99%

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The hematite–goethite enhancement model of loess and an ‘irregular’ case from Paks, Hungary

Bradák

Seto

Csonka

et al. 2019

J Quaternary Science

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On the basis of a key model of the appearance of hematite and goethite in some Chinese and European loess successions, paleosols generally contain higher proportions of hematite formed by pedogenic processes during warm and humid interglacials, while loess contains sedimentary goethite deposited during colder, glacial periods. Rock magnetic measurements were conducted on samples from Paks (Hungary) loess, revealing an anomalous case. Sediments were found to contain higher amounts of hematite and/or goethite, while the well‐developed paleosols were found to be lacking in hematite but had significant amounts of magnetite and maghemite. This observation demonstrates that the character of pedogenic magnetic mineral alteration and neoformation differs from the hematite/goethite model; the model is therefore not applicable to the Paks succession, possibly due to differences in the regional paleoclimate and pedogenic environment. The results indicate the existence of a further model, in which hematite formation is not significant in the course of pedogenesis.

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Section: Discussionmentioning

confidence: 99%

“…As expected, interglacials of both the CLP and the ELB are characterized by significantly higher precipitation than the glacials. Over the period between MIS1 and MIS15, 590–1120 mm a −1 annual precipitation was estimated (Sartori et al, ; Liu et al, ) in the CLP. These figures are between 5 and 30% higher than at present.…”

Section: Discussionmentioning

confidence: 99%

The hematite–goethite enhancement model of loess and an ‘irregular’ case from Paks, Hungary

Bradák

Seto

Csonka

et al. 2019

J Quaternary Science

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“…The ARM/SIRM best fit slope for the UZ is higher than that for the SMZ and LZ, indicating the smallest grain size of magnetic particles above the SP (Figure f). Liu et al [] reported that the Sanmenxia loess generally has finer‐grained pedogenic magnetic particles than the Luochuan loess because Sanmenxia is in the southeast of Luochuan and experienced higher precipitation and temperature. The reason for the humid and warm climate during the formation of the UZ remains unclear due to a lack of age data.…”

Section: Discussionmentioning

confidence: 99%

Magnetism of a red soil core derived from basalt, northern Hainan Island, China: Volcanic ash versus pedogenesis

Liu

Wei

et al. 2017

JGR Solid Earth

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Similar to loess‐paleosol sequences in northwestern China, terrestrial sedimentary sequences (red soils) in southern China also provide sensitive Quaternary records of subtropical/tropical paleoclimate and paleoenvironment. Compared with red clay sequences originated from eolian dust, red soils derived from bedrock have received little attention. In this study, a long core of red soil derived from weathered basalt in northern Hainan Island, China, was systematically investigated by using detailed magnetic measurements and rare earth element analyses. The results show that an extremely strong magnetic zone with a maximum magnetic susceptibility (>10 × 10−5 m3 kg−1) is interbedded in the middle of the core profile. This layer contains a significant amount of superparamagnetic magnetite/maghemite particles that primarily originated from volcanic ash, with secondary contributions from pedogenesis. The former has an average grain size of ~19 nm with a normal distribution of volume, and the latter has a much wider grain size distribution. The presence of volcanic ash within the red soil indicates that these Quaternary basalts were not formed by continuous volcanic eruptions. Moreover, the magnetic enhancement patterns differ between the upper and lower zones. The upper zone is more magnetically enhanced and experienced higher precipitation and temperature than the lower zone. Discrimination of superparamagnetic particles originating from pedogenic processes and volcanic ash thus provides a sound theoretical base for accurate interpretation of magnetism in red soils in this region.

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“…The grain size exhibits a progressive fining trend from the bottom to the top of the section (Figure 7a and b), whereas χ fd exhibits a significant increasing trend from ~0.8 m and maintains high values until the top of the section. χ fd reflects the presence of fine ferrimagnetic grains of pedogenic origin and is frequently used as in indicator of the degree of pedogenesis in loess-paleosol research (Liu et al, 2007) and has been widely applied to loess-paleosol sequences (Bloemendal et al, 2008;Jia et al, 2013;Liu et al, 2016). The grain size and χ fd records indicate that paleosol development commenced at the depth of ~0.8 m, which corresponds to an age of 6.0 ± 0.5 ka; thus, we infer that an environmental shift toward increased humidity occurred after ~6 ka in the Talede region, the Yili Basin.…”

Section: Age Of the Holocene Paleosol And Its Climatic Significancementioning

confidence: 99%

Optical dating of Holocene paleosol development and climate changes in the Yili Basin, arid central Asia

et al. 2019

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Optically stimulated luminescence (OSL) dating was conducted on the K-feldspar and quartz fractions of a Holocene loess-paleosol sequence in the Yili Basin, in the core area of arid central Asia (ACA). Age overestimation using the post-IR IR (pIR50IR170) signals from feldspar was observed for paleosols, because of poor bleaching prior to deposition. Therefore, a reliable age framework for the studied section was established using OSL dating of coarse-grained quartz, combined with a Bacon age model. A total of 18 OSL ages were obtained from a 2.5-m-loess/paleosol sequence with age range of 17.4–0.4 ka. Magnetic and grain-size proxies were used to reconstruct environmental changes during the studied interval, and the results indicate that paleosol development commenced at ~6 ka in the Yili Basin, which is consistent with previous studies in the Xinjiang region. Dust accumulation rates (DARs) and end-member analysis (EMA) of the grain-size frequency distributions were used to infer variations in the Westerlies during the Holocene, and the results suggest that the Westerlies were the main source of excess moisture in ACA during the studied interval.

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Quantifying paleoprecipitation of the Luochuan and Sanmenxia Loess on the Chinese Loess Plateau

Cited by 14 publications

References 53 publications

The hematite–goethite enhancement model of loess and an ‘irregular’ case from Paks, Hungary

The hematite–goethite enhancement model of loess and an ‘irregular’ case from Paks, Hungary

Magnetism of a red soil core derived from basalt, northern Hainan Island, China: Volcanic ash versus pedogenesis

Optical dating of Holocene paleosol development and climate changes in the Yili Basin, arid central Asia

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