"巫山黄土"的磁组构特征及成因

张玉芬; 李长安; 邵磊; 罗昊; 蒋维杰; 牛志军; 赵小明; 涂兵

doi:10.3799/dqkx.2010.103

Volume 35 Issue 5

Sep. 2010

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Article Navigation > Earth Science > 2010 > 35(5): 885-890

ZHANG Yu-fen, LI Chang-an, SHAO Lei, LUO Hao, JIANG Wei-jie, NIU Zhi-jun, ZHAO Xiao-ming, TU Bing, 2010. Magnetic Fabric Characteristics and Implications for Its Origin of 'Wushan Loess'. Earth Science, 35(5): 885-890. doi: 10.3799/dqkx.2010.103

Citation:

ZHANG Yu-fen, LI Chang-an, SHAO Lei, LUO Hao, JIANG Wei-jie, NIU Zhi-jun, ZHAO Xiao-ming, TU Bing, 2010. Magnetic Fabric Characteristics and Implications for Its Origin of "Wushan Loess". Earth Science, 35(5): 885-890. doi: 10.3799/dqkx.2010.103

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Magnetic Fabric Characteristics and Implications for Its Origin of "Wushan Loess"

doi: 10.3799/dqkx.2010.103

1.
Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan 430074, China
2.
Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan 430074, China
3.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
4.
Wuhan Institute of Geological and Mineral Resources, Wuhan 430205, China

Received Date: 2010-05-31
Publish Date: 2010-09-01

Abstract

Abstract

In this paper we present the magnetic fabric and magnetic susceptibility characters of one newly found "Wushan Loess" Section, which was also compared with the modern Yangtze River sediments and aeolian loess and "Sand-Dune" sediments distributed at the Middle Yangtze River. The results are as follows. (1) The κ, P, F, L, E values of the "Wushan Loess" are close to those of the aeolian loess and "Sand-Dune" sediments, however these values are obviously lower than those of the modern Yangtze River sediments. (2) Shown on the F-L graph, data of the "Wushan Loess" converge upon the origin of coordinates, similar to the aeolian loess and "Sand-Dune" sediments distributed at the Middle Yangtze River, which reveals sedimentary environment with relatively lower power. Data of the modern Yangtze River sediments lies around the F-axis, showing more dominance of F rather than L. (3) Maximum magnetic principal axis of the "Wushan Loess" is similar to that of the aeolian loess and "Sand-Dune" sediments distributed at the Middle Yangtze River, with the direction of declination relatively dispersing and the inclination of long axis varying between 36° and 38° and the inclination of the short axis varying between 37° and 39°. However the direction of maximum magnetic principal axis declination of the modern Yangtze River is relatively stable with inclination of the long axis smaller than 10° and short axis bigger than 80°. (4) T values of the "Wushan Loess" vary between -1 and 1 while T values of the modern Yangtze River are mainly higher than 1. Generally, magnetic fabric characters are similar to aeolian loess and "Sand-Dune" sediments distributed at the Middle Yangtze River, revealing its aeolian origin.
- Middle and Upper Yangtze River,
- "Wushan Loess",
- magnetic fabric character,
- aeolian origin

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References(41)

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Magnetic Fabric Characteristics and Implications for Its Origin of "Wushan Loess"

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