Timing of the Brunhes-Matuyama magnetic polarity reversal inChinese loess using 10Be | |
Zhou,WJ(Zhou,Weijian)[1,2]; Beck,JW(Beck,J.Warren)[3]; Kong,XH(Kong,Xianghui)[1,2]; An,ZS(An,Zhisheng)[1]; Qiang,XK(Qiang,Xiaoke)[1]; Wu,ZK(Wu,Zhenkun)[1,2]; Xian,F(Xian,Feng)[1,2]; Ao,H(Ao,Hong)[1] | |
2014-09-08 | |
发表期刊 | Geology |
卷号 | 42期号:6页码:467-470 |
文章类型 | 期刊论文 |
摘要 | In Chinese loess, the Brunhes-Matuyama (B-M) geomagnetic reversal occurs ~25 k.y. prior to the age found in marine sediments. This offset has been attributed by some to post-depositional magnetic overprinting of loess, while others have argued it is due to errors in the loess time scale. Here we solve this long-standing debate by exploiting a new method to extract reproducible records of geomagnetic fi eld intensity from loess with 10Be—a proxy for global average geomagnetic fi eld intensity—and using it to show that a pronounced minimum in field intensity (a requirement for dipole fi eld reversal) is recorded in two separate loess records at ca. 780 ± 3 kyr B.P. This timing is synchronous with the B-M reversal timing seen in marine records, verifying the standard loess time scale as correct, but it is ~25 k.y. younger than the age (depth) of the magnetic polarity reversal recorded in these same Chinese loess sediments, demonstrating that loess magnetic overprinting has occurred. |
DOI | 10.1130/G35443.1 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9883 |
专题 | 加速器质谱中心 |
通讯作者 | Zhou,WJ(Zhou,Weijian)[1,2] |
作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an710075, China; 2.Xi’an AMS Center, Institute of Earth Environment and Xi’an Jiaotong University, Xi’an 710061, China; 3.National Science Foundation Arizona Accelerator Mass Spectrometry Facility, University of Arizona, Tucson, Arizona 85721, USA |
推荐引用方式 GB/T 7714 | Zhou,WJ,Beck,JW,Kong,XH,et al. Timing of the Brunhes-Matuyama magnetic polarity reversal inChinese loess using 10Be[J]. Geology,2014,42(6):467-470. |
APA | Zhou,WJ.,Beck,JW.,Kong,XH.,An,ZS.,Qiang,XK.,...&Ao,H.(2014).Timing of the Brunhes-Matuyama magnetic polarity reversal inChinese loess using 10Be.Geology,42(6),467-470. |
MLA | Zhou,WJ,et al."Timing of the Brunhes-Matuyama magnetic polarity reversal inChinese loess using 10Be".Geology 42.6(2014):467-470. |
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Timing of the Brunhe(970KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
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