Magnetic signature of environmental change reflected by Pleistocene lacustrine sediments from the Nihewan Basin, North China

Wang, Xisheng; Løvlie, Reidar; Su, P.; Fan, Xin

doi:10.1016/j.palaeo.2007.12.006

Cited by 43 publications

(36 citation statements)

References 54 publications

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“…Values above 80% reflect the dominance of magnetite (maghemite), whereas values below this percentage represent increasing contributions from antiferromagnetic minerals (hematite or goethite) [62]. The values of S 300 in core GH09B1 are all above 80%, which identifies magnetite as the dominant magnetic minerals ( Figure 6).…”

Section: Variations In Magnetic Parameters With Depthmentioning

confidence: 99%

Humid medieval warm period recorded by magnetic characteristics of sediments from Gonghai Lake, Shanxi, North China

Liu

Chen

et al. 2011

Chin. Sci. Bull.

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Variations in monsoon strength, moisture or precipitation in eastern China during the MWP reflected by different climatic records have shown apparent discrepancies. Here, detailed environmental magnetic investigations and mineralogical analyses were conducted on lacustrine sediments of Core GH09B1 (2.8 m long) from Gonghai Lake, Shanxi, North China, concerning the monsoon history during the MWP. The results demonstrate that the main magnetic mineral is magnetite. The sediments with relatively high magnetic mineral concentrations were characterized by relatively fine magnetic grain sizes, which were formed in a period of relatively strong pedogenesis and high precipitation. In contrast, the sediments with low magnetic mineral concentrations reflected an opposite process. The variations of magnetic parameters in Gonghai Lake sediments were mainly controlled by the degree of pedogenesis in the lake drainage basin, which further indicated the strength of the Asian summer monsoon. The variations in the  and S 300 parameters of the core clearly reveal the Asian summer monsoon history over the last 1200 years in the study area, suggesting generally abundant precipitation and a strong summer monsoon during the Medieval Warm Period (MWP, AD 910-1220), which is supported by pollen evidence. Furthermore, this 3-6-year resolution environmental magnetic record indicates a dry event around AD 980-1050, interrupting the generally humid MWP. The summer monsoon evolution over the last millennium recorded by magnetic parameters in sediments from Gonghai Lake correlates well with historical documentation (North China) and speleothem oxygen isotopes (Wanxiang Cave), as well as precipitation modeling results (extratropical East Asia), which all indicate a generally humid MWP within which centennial-scale moisture variability existed. It is thus demonstrated that environmental magnetic parameters could be used as an effective proxy for monsoon climate variations in high-resolution lacustrine sediments.Gonghai Lake, lacustrine sediments, magnetic parameter, Medieval Warm Period, humid climate

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Section: Variations In Magnetic Parameters With Depthmentioning

confidence: 99%

Humid medieval warm period recorded by magnetic characteristics of sediments from Gonghai Lake, Shanxi, North China

Liu

Chen

et al. 2011

Chin. Sci. Bull.

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“…Recent studies have suggested that the magnetic mineralogy and the element composition of Nihewan Formation are closely linked to the Asian monsoon variations (Ao, 2010;Ao et al, 2010a) and that some climatic indexes (e.g. magnetic susceptibility (χ) and bulk grain size) correlate well to the marine δ 18 O record (Li et al, 2008b;Wang et al, 2008a;Ao et al, 2010b). Thus the Nihewan Formation enables in principle to retrieve a wealth of information on the Pleistocene monsoon evolution in North China, comparable with the information contained in the Chinese loess deposits.…”

Section: Introductionmentioning

confidence: 99%

Different orbital rhythms in the Asian summer monsoon records from North and South China during the Pleistocene

Dekkers

Xiao

et al. 2012

Global and Planetary Change

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“…The Nihewan Basin (North China) contains essentially continuous paleomagnetic, paleoclimatic, paleontological and archaeological records throughout the entire Pleistocene (Qiu, 2000;Zhu et al, 2003Zhu et al, , 2007Xie, 2006;Xie et al, 2006;Deng et al, 2008;Li et al, 2008;Wang et al, 2008;Dennell, 2009;Keates, 2010). Especially it is a major focus of investigations into early human occupation in East Asia, where most of the few hominin or Paleolithic sites of Pleistocene age in the eastern Asia were found (Zhu et al, 2003Xie, 2006;Xie et al, 2006;Dennell, 2009;Keates, 2010).…”

Section: Introductionmentioning

confidence: 99%

Mineral-magnetic signal of long-term climatic variation in Pleistocene fluvio-lacustrine sediments, Nihewan Basin (North China)

2010

Journal of Asian Earth Sciences

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Magnetic signature of environmental change reflected by Pleistocene lacustrine sediments from the Nihewan Basin, North China

Cited by 43 publications

References 54 publications

Humid medieval warm period recorded by magnetic characteristics of sediments from Gonghai Lake, Shanxi, North China

Humid medieval warm period recorded by magnetic characteristics of sediments from Gonghai Lake, Shanxi, North China

Different orbital rhythms in the Asian summer monsoon records from North and South China during the Pleistocene

Mineral-magnetic signal of long-term climatic variation in Pleistocene fluvio-lacustrine sediments, Nihewan Basin (North China)

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