Magnetic granulometry of recent sediments from the Huguang Maar and its implication for provenience

Han, Ying‐Feng; Tan, Xiaodong; Chen, Zhong; Xiang, Rong; Zhang, Lanlan

doi:10.1007/s11434-009-0585-5

Cited by 12 publications

(8 citation statements)

References 26 publications

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“…Consistent with previous studies (Han et al 2010), our results indicate that magnetite is the dominant magnetic mineral in lake sediments as evidenced from the χ -T curves, by the Curie temperature of magnetite at ∼585 • C (Dunlop &Özdemir 1997; Fig. 3a).…”

Section: Magnetic Mineralssupporting

confidence: 93%

“…In this paper, sediments from the Huguangyan (HGY) maar lake, southern China are used to construct PSV records. One more reason to investigate this lake is that palaeoclimatic variations since the late Pleistocene in the tropical area of China and some magnetic properties of sediments have already been documented (Liu et al 2000; Chu et al 2002; Mingram et al 2004; Wang et al 2007; Yancheva et al 2008; Han et al 2010). The results of these studies provide a solid framework within which to construct a record of PSV from this lake.…”

Section: Introductionmentioning

confidence: 99%

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A Holocene palaeomagnetic secular variation record from Huguangyan maar Lake, southern China

Yang¹,

Liu²,

Duan³

et al. 2012

Geophysical Journal International

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SUMMARY A composite Holocene sediment profile ∼5 m in length, constrained by both radiocarbon dating and magnetic susceptibility based correlation, was obtained from three Livingstone piston cores collected in ∼10‐m water depth in the Huguangyan (HGY) maar lake, southern China. The homogeneous silty clay indicates stable and continuous deposition. The dominant magnetic carrier is magnetite in the pseudo‐single‐domain grain size range and thus is suitable for recording palaeomagnetic secular variations (PSV). Results show that the HGY PSV curves can be correlated faithfully to the counterparts at a regional scale. Therefore, the PSV data is a potential tool for stratigraphic correlation and for further refining the chronological framework of lake sediment sequences from Southern China. Further comparison of the HGY PSV records with the coeval European and North American counterparts confirms the existence of strong permanent magnetic flux lobes at the core–mantle boundary. The discrepancy in amplitude and out‐phase pattern among the different regional records may be ascribed to the evolution of the magnetic flux lobes.

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Section: Magnetic Mineralssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

A Holocene palaeomagnetic secular variation record from Huguangyan maar Lake, southern China

Yang¹,

Liu²,

Duan³

et al. 2012

Geophysical Journal International

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“…It shows that the loops have characteristics typical of the soft magneticparticles. The saturationm agnetization( M s )o fs pherical particles is 220.45 emu g -1 and that of flaky particles 200.34emu g -1 .Inthe case of flaky CIPs, the M s valuedecreases, which is consistent withthe results of previous researches [16].…”

Section: Preparation Of Materialssupporting

confidence: 90%

Piezo-absorbing effect of microwave absorbing composites with carbonyl iron particles as the filler

Zhang

Liu²,

2015

International Journal of Materials Research

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Piezo-absorbing effect of microwave absorbing composites with carbonyl iron particles as the filler Anew piezo-absorbing composite was fabricated with silicone rubber and spherical or flaky carbonyl iron particles (CIPs). The complex permittivity and permeability of the composites, under variable compressive strain, werem easured using av ector network analyzer in the frequency of 2-18GHz and the reflection loss ( RL)c alculated to test the piezo-absorbing effect. The results show that, under compressive strain, the complex permittivity decreased slightly because of the breakdown of the original conductive network, whereas the complex permeability increased, but the enhancement mechanism was different.Inthe case of spherical CIPs/rubber composite, this was caused by the surface effect of the absorbents, and in the caseo ff laky CIPs/rubber compositebythe orientation of the flaky particles. As the compressive strain was applied, the RL value and the absorbing band changed slightly with thickness of 1mmor2mm. As the applied strains decreasedthe thickness of the composites,the absorption band ( RL < -10 dB) broadened and the minimum RL decreased.C. Zhang et al.: Piezo-absorbing effect of microwave absorbing composites with carbonyli ron particles as the filler Int.

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“…The grain size and mineralogical evidence, documented by the extent of muddy sediments on the shelf of the East China Sea, also supports the idea of a weakening of the East Asian winter monsoon in the late mid-Holocene. The record from Huguang Maar lake revealed that the weakest East Asian winter monsoon occurred during the early Holocene (Yancheva et al, 2007); however, this result is contradicted by the findings of Han et al (2010). Therefore the fact that a strengthened East Asian summer monsoon corresponded to a moderate winter monsoon in the early-mid Holocene is confirmed in the southern Chinese Loess Plateau area, and this situation may also have occurred over a much wider region.…”

Section: Discussionmentioning

confidence: 92%

Out-of-phase evolution between summer and winter East Asian monsoons during the Holocene as recorded by Chinese loess deposits

Xia

Jia

et al. 2014

Quat. res.

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We analyzed climate proxies from loessic-soil sections of the southern Chinese Loess Plateau. The early Holocene paleosol, S0, is 3.2 m thick and contains six sub-soil units. Co-eval soils from the central Loess Plateau are thinner (~ 1 m). Consequently higher-resolution stratigraphic analyses can be made on our new sections and provide more insight into Holocene temporal variation of the East Asian monsoon. Both summer and winter monsoon evolution signals are recorded in the same sections, enabling the study of phase relationships between the signals. Our analyses consist of (i) measurements of magnetic properties sensitive to the production of fine-grained magnetic minerals which reflect precipitation intensity and summer monsoon strength; and (ii) grain-size analyses which reflect winter monsoon strength. Our results indicate that the Holocene precipitation maximum occurred in the mid-Holocene, ~ 7.8–3.5 cal ka BP, with an arid interval at 6.3–5.3 cal ka BP. The winter monsoon intensity declined to a minimum during 5.0–3.4 cal ka BP. These results suggest that the East Asian summer and winter monsoons were out of phase during the Holocene, possibly due to their different sensitivities to ice and snow coverage at high latitudes and to sea-surface temperature at low latitudes.

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Magnetic granulometry of recent sediments from the Huguang Maar and its implication for provenience

Cited by 12 publications

References 26 publications

A Holocene palaeomagnetic secular variation record from Huguangyan maar Lake, southern China

A Holocene palaeomagnetic secular variation record from Huguangyan maar Lake, southern China

Piezo-absorbing effect of microwave absorbing composites with carbonyl iron particles as the filler

Out-of-phase evolution between summer and winter East Asian monsoons during the Holocene as recorded by Chinese loess deposits

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