MAGNETOSTRATIGRAPHY OF A LOESS-SOIL SEQUENCE IN THE GARZE AREA, WESTERN SICHUAN

QIAO Yan-song; LIU Dong-yan; LI Chao-zhu; LI Ming-ze; WANG Yan; ZHAO Zhi-zhong

2007 Vol. 13, No. 4

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Article navigation > Journal of Geomechanics > 2007 > 13(4): 289-296

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QIAO Yan-song, LIU Dong-yan, LI Chao-zhu, LI Ming-ze, WANG Yan, ZHAO Zhi-zhong. MAGNETOSTRATIGRAPHY OF A LOESS-SOIL SEQUENCE IN THE GARZE AREA, WESTERN SICHUAN[J]. Journal of Geomechanics, 2007, 13(4): 289-296.

Citation:

QIAO Yan-song, LIU Dong-yan, LI Chao-zhu, LI Ming-ze, WANG Yan, ZHAO Zhi-zhong. MAGNETOSTRATIGRAPHY OF A LOESS-SOIL SEQUENCE IN THE GARZE AREA, WESTERN SICHUAN[J]. Journal of Geomechanics, 2007, 13(4): 289-296.

MAGNETOSTRATIGRAPHY OF A LOESS-SOIL SEQUENCE IN THE GARZE AREA, WESTERN SICHUAN

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
College of Marine Geoscience, Ocean University of China, Qingdao 266003, Shandong, China

Received Date: 10 October 2007

Publish Date: 25 December 2007

Abstract

Abstract

The western Sichuan Plateau is located on the southeastern margin of the Qinghai-Tibet Plateau, and its climate is mainly controlled by the Indian monsoon and Plateau monsoon.The loesspaleosol sequence distributed widely on the western Sichuan Plateau is among the best continuous records of the Quaternary climate and environment on the margins of the plateau.It records the evolutionary process of the above-mentioned circulation system and its relation to the phased evolution of the QinghaiTibet Plateau and is crucial for understanding the regional environmental response to the uplift of the plateau.A systematic magnetostratigraphic study was conducted on the Garzê-A section in the Garzê area, western Sichuan.The results indicate that the B/M boundary appears at the top of L₇ and that the Jaramillo normal polarity subzone of the Matuyama negative polarity zone appears in the lower part of the section.Extrapolation from the paleomagnetic boundary point yields a basal age of ～1.16 Ma for typical eolian deposits of the Garzê-A section.
- western Sichuan Plateau /
- Garzê /
- Garzê-A section /
- magnetostratigraphy

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References

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