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  4. 岩石圈演化国家重点实验室
Acquisition of chemical remanent magnetization during experimental ferrihydrite-hematite conversion in Earth-like magnetic field-implications for paleomagnetic studies of red beds

文献类型：期刊论文

作者Jiang, Zhaoxia1; Liu, Qingsong1; Dekkers, Mark J.2; Tauxe, Lisa3; Qin, Huafeng1; Barron, Vidal4; Torrent, Jose4
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2015-10-15
卷号428页码:1-10
关键词hematite crystal growth chemical remanent magnetization (CRM) detrital remanent magnetization (DRM)
DOI10.1016/j.epsl.2015.07.024
文献子类Article
英文摘要Hematite-bearing red beds are renowned for their chemical remanent magnetization (CRM). If the CRM was acquired substantially later than the sediment was formed, this severely compromises paleomagnetic records. To improve our interpretation of the natural remanent magnetization, the intricacies of the CRM acquisition process must be understood. Here, we contribute to this issue by synthesizing hematite under controlled 'Earth-like' field conditions (less than or similar to 100 mu T). CRM was imparted in 90 oriented samples with varying inclinations. The final synthesis product appeared to be dominated by hematite with traces of ferrimagnetic iron oxides. When the magnetic field intensity is greater than or similar to 40 mu T, the CRM records the field direction faithfully. However, for field intensities less than or similar to 40 mu T, the CRM direction may deviate considerably from that of the applied field during synthesis. The CRM intensity normalized by the isothermal remanent magnetization (CRM/IRM@2.5T) increases linearly with the intensity of growth field, implying that CRM could potentially be useful for relative paleointensity studies if hematite particles of chemical origins have consistent properties. CRM in hematite has a distributed unblocking temperature spectrum from 200 to similar to 650 degrees C, while hematite with a depositional remanent magnetization (DRM) has a more confined spectrum from 600 to 680 degrees C because it is usually coarser-grained and more stoichiometric. Therefore, the thermal decay curves of CRM with their concave shape are notably different from their DRM counterparts which are convex. These differences together are suggested to be a potential discriminator of CRM from DRM carried by hematite in natural red beds, and of significance for the interpretation of paleomagnetic studies on red beds. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词LATE PALEOZOIC REMAGNETIZATION ; SEDIMENTARY-ROCKS ; SOUTH-CHINA ; SYNTHETIC HEMATITE ; NORTH-AMERICA ; BASIN ; ORIGIN ; CRM ; MAGNETOSTRATIGRAPHY ; DISCRIMINATION
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000360952600001
资助机构National Natural Science Foundation of China(41430962 ; National Natural Science Foundation of China(41430962 ; National Natural Science Foundation of China(41430962 ; National Natural Science Foundation of China(41430962 ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; NSF(EAR1345003) ; NSF(EAR1345003) ; NSF(EAR1345003) ; NSF(EAR1345003) ; (GASI-GEOGE-03) ; (GASI-GEOGE-03) ; (GASI-GEOGE-03) ; (GASI-GEOGE-03) ; 41374073 ; 41374073 ; 41374073 ; 41374073 ; 41025013) ; 41025013) ; 41025013) ; 41025013) ; National Natural Science Foundation of China(41430962 ; National Natural Science Foundation of China(41430962 ; National Natural Science Foundation of China(41430962 ; National Natural Science Foundation of China(41430962 ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; Chinese Continental Shelf Deep Drilling Program(GZH201100202) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; NSF(EAR1345003) ; NSF(EAR1345003) ; NSF(EAR1345003) ; NSF(EAR1345003) ; (GASI-GEOGE-03) ; (GASI-GEOGE-03) ; (GASI-GEOGE-03) ; (GASI-GEOGE-03) ; 41374073 ; 41374073 ; 41374073 ; 41374073 ; 41025013) ; 41025013) ; 41025013) ; 41025013)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62259]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Utrecht, Fac Geosci, Paleomagnet Lab Ft Hoofddijk, Dept Earth Sci, NL-3584 CD Utrecht, Netherlands
3.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA
4.Univ Cordoba, Dept Agron, Cordoba 14071, Spain
推荐引用方式
GB/T 7714		 Jiang, Zhaoxia,Liu, Qingsong,Dekkers, Mark J.,et al. Acquisition of chemical remanent magnetization during experimental ferrihydrite-hematite conversion in Earth-like magnetic field-implications for paleomagnetic studies of red beds[J]. EARTH AND PLANETARY SCIENCE LETTERS,2015,428:1-10.
APA Jiang, Zhaoxia.,Liu, Qingsong.,Dekkers, Mark J..,Tauxe, Lisa.,Qin, Huafeng.,...&Torrent, Jose.(2015).Acquisition of chemical remanent magnetization during experimental ferrihydrite-hematite conversion in Earth-like magnetic field-implications for paleomagnetic studies of red beds.EARTH AND PLANETARY SCIENCE LETTERS,428,1-10.
MLA Jiang, Zhaoxia,et al."Acquisition of chemical remanent magnetization during experimental ferrihydrite-hematite conversion in Earth-like magnetic field-implications for paleomagnetic studies of red beds".EARTH AND PLANETARY SCIENCE LETTERS 428(2015):1-10.

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来源：地质与地球物理研究所

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