中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院地球与行星物理重点实验室
A Thick Negative Polarity Anomaly in a Sediment Core From the Central Arctic Ocean: Geomagnetic Excursion Versus Reversal

文献类型：期刊论文

作者Liu, Jianxing5,6; Shi, Xuefa5,6; Liu, Yanguang5,6; Liu, Qingsong4,5; Liu, Yan1,3; Zhang, Qiang2,3; Ge, Shulan5,6; Li, Jinhua1,5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2019-11-11
页码17
ISSN号2169-9313
DOI10.1029/2019JB018073
英文摘要There are two distinctly different views on Quaternary sedimentation rates in the central Arctic Ocean, namely, that they were on cm/kyr or on mm/kyr scales, largely as a result of divergent interpretations of magnetic reversal stratigraphy. This study provides new evidence to help resolve this controversy in the form of an almost 1-m-thick negative polarity interval located at similar to 1.15 m below the seafloor in a 4.15-m-long sediment core from the Lomonosov Ridge, central Arctic Ocean. This thick polarity anomaly was first revealed through alternating field demagnetization of natural remanent magnetization on u-channel samples. It was subsequently confirmed to be an authentic signal of a syndepositional geomagnetic field by integrating detailed rock magnetic studies, transmission electron microscopy with energy-dispersive X-ray spectroscopy analyses of magnetic extracts, and both alternating field and thermal demagnetization of discrete paleomagnetic samples. Here we conclude that it is more reasonable to interpret the reversed interval as a record of the Matuyama Chron rather than a Brunhes-aged excursion, which yields mean sedimentation rates of similar to 1.5 mm/kyr and similar to 0.5 mm/kyr in the Brunhes and Matuyama Chrons, respectively. These estimates are remarkably lower than assumed in most recent studies, but in good agreement with both previous magnetostratigraphic and recent geochemical studies relative to the decay of Be and U-series isotopes, which might indicate "sediment-starved" environments at least in some parts of this region. Overall, our results not only imply that chronostratigraphy in the central Arctic Ocean remains open to debate but also warrant further investigations in this microfossil-barren region.
WOS关键词MAGNETIC PARTICLE-SYSTEMS ; AMINO-ACID EPIMERIZATION ; LATE QUATERNARY ; LOMONOSOV RIDGE ; PLEISTOCENE STRATIGRAPHY ; RAPID SEDIMENTATION ; YERMAK PLATEAU ; MAKAROV BASIN ; ALPHA RIDGE ; SEA-ICE
资助项目National Natural Science Foundation of China[41876070] ; National Natural Science Foundation of China[U1606401] ; National Natural Science Foundation of China[41876229] ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes[CHINARE 03-02] ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology[MGQNLM201704]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000495559300001
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Opening Foundation of the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology
源URL[http://ir.iggcas.ac.cn/handle/132A11/95715]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Liu, Yanguang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qiangdao, Peoples R China
6.MNR, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Jianxing,Shi, Xuefa,Liu, Yanguang,et al. A Thick Negative Polarity Anomaly in a Sediment Core From the Central Arctic Ocean: Geomagnetic Excursion Versus Reversal[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019:17.
APA Liu, Jianxing.,Shi, Xuefa.,Liu, Yanguang.,Liu, Qingsong.,Liu, Yan.,...&Li, Jinhua.(2019).A Thick Negative Polarity Anomaly in a Sediment Core From the Central Arctic Ocean: Geomagnetic Excursion Versus Reversal.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,17.
MLA Liu, Jianxing,et al."A Thick Negative Polarity Anomaly in a Sediment Core From the Central Arctic Ocean: Geomagnetic Excursion Versus Reversal".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019):17.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。