Rock-Magnetic Characteristics and the Enhancing Mechanism of Magnetic Susceptibility for West Kunlun Mountains Loess

• 责任者：Zan Jinbo (Key Laboratory of Western China’s Environmental Systems ; Ministry of Education ; College of Earth and Environmental Science ; Lanzhou University ; Lanzhou 730000 ; China) ; Yang Sheng
• 刊名：Quaternary Sciences
• 出版年：2010
• 卷期：30(1)
• 关键词：全新世 ; Holocene ; 黄土 ; loess ; 岩石磁学 ; rock magnetism ; 昆仑山 ; Kunlun Mountains
• 页码：p.46-53
• 图表：3 illus. 42 refs.
• 分类号：1400
• issnNo：ISSN1001-7410
• isbnNo：CN11-2708/P

The authors obtained a 671 m long loess core through drilling on the northern slope of the West Kunlun Mountains. In this paper, the authors investigated its 207 m long loess core by integrating both rockmagnetic and grain size proxies. The study results suggest that the low coercivity minerals，i.e，magnetite and maghemite are dominated in the loess. The characteristics of typical hysteresis loops probably imply the presence of paramagnetic component to a certain extent. These results improved the understanding of the enhancing mechanism of susceptibility at different sites with different paleoenvironmental conditions: in comparison with the ultrafine pedogenic minerals，coarse lithogenic magnetic minerals can also play an important role in enhancement of MS at some time.