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Magnetostratigraphy of a greigite-bearing core from the South Yellow Sea: Implications for remagnetization and sedimentation

文献类型：期刊论文

作者Liu, Jianxing1,2,3; Shi, Xuefa1; Liu, Qingsong2; Ge, Shulan1; Liu, Yanguang1; Yao, Zhengquan1; Zhao, Quanhong4; Jin, Chunsheng2; Jiang, Zhaoxia2,3; Liu, Shengfa1
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2014-10-01
卷号119期号:10页码:7425-7441
关键词South Yellow Sea continental shelf greigite rock magnetism magnetostratigraphy
ISSN号2169-9313
DOI10.1002/2014JB011206
文献子类Article
英文摘要Sediments from the continental shelf are sensitive to sea level, climatic changes, and local tectonic history. In this study, we carried out a high-resolution magnetostratigraphic investigation on the longest core (NHH01, 125.64m) recovered from the South Yellow Sea (SYS). An abnormal interval dominated by negative inclinations was discovered by applying alternating field demagnetization (AFD) on samples from a greigite-bearing layer (44.90-51.80m). In contrast, the inclinations of most greigite-bearing samples changed from negative to positive when heated to similar to 360 degrees C. This strongly indicates that this inclination anomaly revealed by the AFD alone is not a true negative subchron. After neglecting the effects of greigite-bearing layers, the straightforward correlation of the interpreted magnetostratigraphy defines the Matuyama-Brunhes boundary (781ka) and the Jaramillo top (990ka) at 68.64m and 101.54m, respectively. The linearly extrapolated basal age of the core is similar to 1.10Ma. In addition, several short-lived inclination anomalies can be tentatively assigned to magnetic excursions, which indicates that the sedimentation could be continuous even at the millennial time scale at depth intervals bracketing these fast geomagnetic events. Moreover, the excellent correspondence between clay content variations of the core and the marine oxygen isotope record indicates the potential of clay content as a paleoclimatic proxy in the studied region in the past similar to 1Ma. In brief, our study provides not only a robust age model in the SYS but also a methodological guide for paleomagnetic studies in continental shelf region.
WOS关键词LATE DIAGENETIC GROWTH ; MARINE-SEDIMENTS ; ROCK MAGNETISM ; NORTH-ATLANTIC ; SELF-REVERSAL ; GRAIN-SIZE ; AUTHIGENIC GREIGITE ; SOUTHWESTERN TAIWAN ; BOHAI SEA ; CHINA
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000345368500003
出版者AMER GEOPHYSICAL UNION
资助机构State Oceanic Administration, China(908-01-BC15) ; State Oceanic Administration, China(908-01-BC15) ; National Natural Science Foundation of China(41025013 ; National Natural Science Foundation of China(41025013 ; 41374073) ; 41374073) ; State Oceanic Administration, China(908-01-BC15) ; State Oceanic Administration, China(908-01-BC15) ; National Natural Science Foundation of China(41025013 ; National Natural Science Foundation of China(41025013 ; 41374073) ; 41374073) ; State Oceanic Administration, China(908-01-BC15) ; State Oceanic Administration, China(908-01-BC15) ; National Natural Science Foundation of China(41025013 ; National Natural Science Foundation of China(41025013 ; 41374073) ; 41374073) ; State Oceanic Administration, China(908-01-BC15) ; State Oceanic Administration, China(908-01-BC15) ; National Natural Science Foundation of China(41025013 ; National Natural Science Foundation of China(41025013 ; 41374073) ; 41374073)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85597]  
专题中国科学院地质与地球物理研究所
通讯作者Shi, Xuefa
作者单位1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism & Geochronol Lab, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Tongji Univ, Sch Ocean & Earth Sci, Shanghai 200092, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Jianxing,Shi, Xuefa,Liu, Qingsong,et al. Magnetostratigraphy of a greigite-bearing core from the South Yellow Sea: Implications for remagnetization and sedimentation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2014,119(10):7425-7441.
APA Liu, Jianxing.,Shi, Xuefa.,Liu, Qingsong.,Ge, Shulan.,Liu, Yanguang.,...&Wang, Chunjuan.(2014).Magnetostratigraphy of a greigite-bearing core from the South Yellow Sea: Implications for remagnetization and sedimentation.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,119(10),7425-7441.
MLA Liu, Jianxing,et al."Magnetostratigraphy of a greigite-bearing core from the South Yellow Sea: Implications for remagnetization and sedimentation".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 119.10(2014):7425-7441.

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来源：地质与地球物理研究所

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