中国黄土<sup>10</sup>Be记录中的古地磁场变化

杜雅娟; 周卫健; 鲜锋; 孔祥辉; 康志海

doi:10.3799/dqkx.2013.048

Volume 38 Issue 3

May 2013

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DU Ya-juan, ZHOU Wei-jian, XIAN Feng, KONG Xiang-hui, KANG Zhi-hai, 2013. The Paleogeomagnetic Intensity Variation from 10Be Record in Chinese Loess. Earth Science, 38(3): 482-488. doi: 10.3799/dqkx.2013.048

Citation:

DU Ya-juan, ZHOU Wei-jian, XIAN Feng, KONG Xiang-hui, KANG Zhi-hai, 2013. The Paleogeomagnetic Intensity Variation from ¹⁰Be Record in Chinese Loess. Earth Science, 38(3): 482-488. doi: 10.3799/dqkx.2013.048

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The Paleogeomagnetic Intensity Variation from ¹⁰Be Record in Chinese Loess

doi: 10.3799/dqkx.2013.048

DU Ya-juan^{1, 2
,},
ZHOU Wei-jian^{1, 2, 3},
XIAN Feng^{1, 2},
KONG Xiang-hui^{1, 2},
KANG Zhi-hai^{1, 2}

1.
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Science, Xi'an 710075, China
2.
Xi'an Accelerator Mass Spectrometry Center, Xi'an 710061, China
3.
School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received Date: 2012-04-05
Publish Date: 2013-05-15

Abstract

Abstract

The ¹⁰Be records in Chinese loess can't be used for tracing the paleogeomagnetic change because of the significant climate effect, so we need to do research on signal separation. The difficulties are summarized in the reconstruction of the paleogeomagnetic intensity by using the ¹⁰Be records in Chinese loess in this paper. Here we present the advantages and shortcomings in our methods used to separate climate effects and geomagnetic modulation effects from ¹⁰Be concentration. Based on these methods, principal component analysis (PCA) is used to extract the common signal of ¹⁰Be from Luochuan and Xifeng loess sections to further clear up the effect of the climate change, noise and other random signals, which we interpret as variations of the global ¹⁰Be production rate of the past 130 ka. The PCA method presented here may be facilitated to solve the difficulties in geological or other signal separation.
- loess,
- ¹⁰Be,
- paleogeomagnetic intensity,
- principal component analysis,
- magnetic susceptibility,
- climate change

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References(37)

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The Paleogeomagnetic Intensity Variation from 10Be Record in Chinese Loess

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