IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Magnetic properties of sediments and their response to environmental changes during the Holocene in the Fuzhou Basin, Fujian, China
Su, ZH (Su,Zhi-Hua)[1]; Yang, XQ (Yang,Xiao-Qiang)[2,3]; Yang, J (Yang,Jie)[2]; Zheng, Z (Zheng,Zhuo)[2]; Yue, YF (Yue,Yuan-Fu)[2]; Wang, JH (Wang,Jian-Hua)[2]
2012-11-30
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
Volume55Issue:11Pages:3718-3730
Subtype期刊论文
Abstract

The Fuzhou basin is an ideal place for high-resolution paleoclimate study due to its special location (in the coastal zone), where sediments recorded a wealth of information on the interaction between ocean and land during the Holocene. In this paper, rock magnetism, environmental magnetism and paleomagnetism features of core FZ5 sediments in the Fuzhou basin were studied to reveal response of magnetic properties to terrigenous input, sea-level change and diagenesis. The rock magnetism results show that ferrimagnetic minerals with low coercivity are the dominant minerals, while the types of magnetic minerals vary in different stages of environmental variation. Magnetite, siderite and some amounts of Fe-sulphides are the main contributors to magnetic properties in the transgression environment during the early and middle Holocene (9 similar to 3 cal. ka BP), although sulphidation dissolved fine-grained magnetite to form greigite and pyrite. However, sulphidation did not completely eliminate the natural remanence carried by magnetite and the dominant controls of the terrestrial detritus input and sea-level fluctuations to magnetic properties in this stage. During the late Holocene (3 cal. ka BP), magnetite was still partly dissolved to greigite due to the earlier reduction in the terrestrial oxidizing environment, but further transformation was restrained by the oxidation then. Strong oxidation process formed the high coercivity minerals and disturbed the natural remanence. During the deposition process, the six strong ancient oxide interfaces were produced at similar to 8.2, similar to 7.7, similar to 7.5, similar to 2.7, similar to 1.5, similar to 0.5 cal. ka BP, respectively, reflecting the unusually dry or humid climate events in the Fuzhou basin over these times.

Indexed BySCIE
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10160
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorSu, ZH (Su,Zhi-Hua)[1]
Affiliation1.School of Resource & Environmental Management, Guizhou University of Finance and Economics,Guiyang 550004, China;
2.Department of Earth Sciences, Sun Yat-Sen University, Guangzhou 510275, China;
3.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Academy of Sciences, Xi’an 710075, China
Recommended Citation
GB/T 7714
Su, ZH ,Yang, XQ ,Yang, J ,et al. Magnetic properties of sediments and their response to environmental changes during the Holocene in the Fuzhou Basin, Fujian, China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2012,55(11):3718-3730.
APA Su, ZH ,Yang, XQ ,Yang, J ,Zheng, Z ,Yue, YF ,&Wang, JH .(2012).Magnetic properties of sediments and their response to environmental changes during the Holocene in the Fuzhou Basin, Fujian, China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,55(11),3718-3730.
MLA Su, ZH ,et al."Magnetic properties of sediments and their response to environmental changes during the Holocene in the Fuzhou Basin, Fujian, China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 55.11(2012):3718-3730.
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