Environmental mechanism of magnetic susceptibility changes of lacustrine sediments from Lake Hulun, China

作     者：胡守云 王苏民 Erwin Appel 吉磊 

作者机构：Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China Institut fur Geologie und Palaontologie Universitat Tubingen Tubingen 72076 Germany 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2000年第43卷第5期

页      面：534-540页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：National Natural Science Foundation of China,NSFC: 49872058 Chinese Academy of Sciences,CAS: KZ951-A1-402-04 

主　　题：lacustrine sediment magnetic susceptibility environmental magnetism ferrimagnetic iron sulphide Lake Hulun. 

摘      要：The changes of magnetic susceptibility (κ) are correlated with those of corresponding sedimentological, geochemical, mineralogical and biological results, which verifies that κ can be taken as one of the environmental proxies. However, usually the exact origin of magnetic signal is poorly understood, and is difficult to relate with the environmental evolution. Magnetic properties of material derived from the catchment and sedimentary environment may affect the accumulation, preservation, or authigenesis and diagenesis of magnetic minerals. In the Lake Hulun region in Inner Mongolia, it is found that muddy sediments, deposited during high water level period (corresponding to humid climate), have comparatively high κ values. In contrast, the sandy sediments, deposited during low water level period (corresponding to arid climate), have low κ values. Detailed rock magnetic investigation confirms that detrital magnetite derived from volcanic rocks in the catchment exists in both muddy and sandy