IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Behavior of Greigite-Bearing Marine Sediments During AF and Thermal Demagnetization and Its Significance
Duan, Zongqi1,2,3; Liu, Qingsong3,4; Qin, Huafeng5; Zhao, Xixi6,7; Gao, Xing1
2020-07-01
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Volume21Issue:7Pages:12
AbstractGyro-remanent magnetization (GRM) is a frequently occurring yet unwanted remanence contamination for certain samples during alternating field (AF) demagnetization of the natural remanent magnetization. The origin and detailed properties of GRM have not yet been fully understood. In this study, systematic rock magnetic analyses were conducted on marine greigite-bearing samples of Hole U1433A drilled by the IODP Expedition 349 from the South China Sea. Results show that GRM is mostly acquired above similar to 55 mT AF demagnetization and can be effectively removed by heating to similar to 400 degrees C during thermal demagnetization but a secondary tail could remain until similar to 585 degrees C. In addition, no apparent GRM was observed during the AF demagnetization for the 400 degrees C thermally treated samples. These results strongly suggest that GRM is dominantly carried by single domain (SD) greigite but with minor contributions from SD magnetite. Thus, thermal treatment alone or the hybrid demagnetization (i.e., thermal demagnetization at similar to 400 degrees C first then systematical AF demagnetization) can efficiently avoid the GRM acquisition and be beneficial for relative paleointensity estimation for greigite-bearing samples. Besides, GRM carried by greigite has a low thermal stability. Our results also show AF demagnetization spectra of anhysteretic remanent magnetization (ARM) could be strongly distorted by GRM effects due to both have a preference of SD particles. Thus, the median destructive field of ARM is improper to be used as a coercivity proxy for greigite-bearing samples. Instead, the biplot analysis of AF demagnetization of natural remanent magnetization and ARM can be used to evaluate the relative content of greigite.
DOI10.1029/2019GC008635
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS KeywordROTATIONAL REMANENT MAGNETIZATION ; ALTERNATING-FIELD DEMAGNETIZATION ; DOMAIN GRAIN SIZES ; GYROREMANENT MAGNETIZATION ; GYROMAGNETIC REMANENCE ; ROCK MAGNETISM ; RELATIVE PALEOINTENSITY ; PARTICLES IMPLICATIONS ; FE3S4 FORMATION ; SEA
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFA0601903] ; Natural Science Foundation of China[41506075] ; Natural Science Foundation of China[41430962] ; Natural Science Foundation of China[41674069] ; Natural Science Foundation of China[91528302] ; Natural Science Foundation of China[91628301] ; U.S. National Science Foundation[EAR-1250444] ; Chinese Continental Shelf Deep Drilling Program[GZH201100202] ; China Postdoctoral Science Foundation[2014M561047]
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; U.S. National Science Foundation ; U.S. National Science Foundation ; Chinese Continental Shelf Deep Drilling Program ; Chinese Continental Shelf Deep Drilling Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000557248500003
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/97617
Collection岩石圈演化国家重点实验室
Corresponding AuthorGao, Xing
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China
2.Geog Soc China, Beijing, Peoples R China
3.Qingdao Natl Oceanog Lab Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
4.Southern Univ Sci & Technol, Dept Marine Sci & Engn, Shenzhen, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
6.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China
7.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA
Recommended Citation
GB/T 7714
Duan, Zongqi,Liu, Qingsong,Qin, Huafeng,et al. Behavior of Greigite-Bearing Marine Sediments During AF and Thermal Demagnetization and Its Significance[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2020,21(7):12.
APA Duan, Zongqi,Liu, Qingsong,Qin, Huafeng,Zhao, Xixi,&Gao, Xing.(2020).Behavior of Greigite-Bearing Marine Sediments During AF and Thermal Demagnetization and Its Significance.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,21(7),12.
MLA Duan, Zongqi,et al."Behavior of Greigite-Bearing Marine Sediments During AF and Thermal Demagnetization and Its Significance".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 21.7(2020):12.
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