| Relative paleointensity of the geomagnetic field during the past 200 ka from the West Philippine Sea and its chronological significance | |
Meng QingYong1,2; Li AnChun1; Li TieGang1 ; Jiang FuQing1; Zhou XiaoJing1,2
| |
| 2009-08-01 | |
| 发表期刊 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| ISSN | 1006-9313 |
| 卷号 | 52期号:8页码:1115-1126 |
| 文章类型 | Article |
| 摘要 | Our rock magnetic analysis of core Ph05 from the West Philippine Sea demonstrates that the core preserves a strong, stable remanent magnetization and meets the magnetic mineral criteria for relative paleointensity (RPI) analyses. The magnetic minerals in the sequence are dominated by pseudosingle-domain magnetite, and the concentration of magnetic minerals is at the same scale. Both the conventional normalizing method and the pseudo-Thellier method were used in conjunction with the examination of the rock magnetic properties and natural remanent magnetization. Susceptibility (chi), anhysteretic remnant magnetization (ARM) and saturation isothermal remnant magnetization (SIRM) were used as the natural remanent magnetization normalizer. However, coherence analysis indicated that only ARM is more suitable for paleointensity reconstruction. The age model of core is established based on oxygen isotope data and AMS(14)C data, which is consistent with the age model estimated from RPI records. The relative paleointensity data provide a continuous record of the intensity variation during the last 200 ka, which correlates well with the global references RPI stacks. Several prominent low paleointensity values are identified and are correlated to the main RPI minima in the SINT-200 record, suggesting that the sediments have recorded the real changes of geomagnetic field.; Our rock magnetic analysis of core Ph05 from the West Philippine Sea demonstrates that the core preserves a strong, stable remanent magnetization and meets the magnetic mineral criteria for relative paleointensity (RPI) analyses. The magnetic minerals in the sequence are dominated by pseudosingle-domain magnetite, and the concentration of magnetic minerals is at the same scale. Both the conventional normalizing method and the pseudo-Thellier method were used in conjunction with the examination of the rock magnetic properties and natural remanent magnetization. Susceptibility (chi), anhysteretic remnant magnetization (ARM) and saturation isothermal remnant magnetization (SIRM) were used as the natural remanent magnetization normalizer. However, coherence analysis indicated that only ARM is more suitable for paleointensity reconstruction. The age model of core is established based on oxygen isotope data and AMS(14)C data, which is consistent with the age model estimated from RPI records. The relative paleointensity data provide a continuous record of the intensity variation during the last 200 ka, which correlates well with the global references RPI stacks. Several prominent low paleointensity values are identified and are correlated to the main RPI minima in the SINT-200 record, suggesting that the sediments have recorded the real changes of geomagnetic field. |
| 关键词 | West Philippine Sea Relative Paleointensity Geomagnetic Field |
| 学科领域 | Geosciences, Multidisciplinary |
| DOI | 10.1007/s11430-009-0119-7 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000268983300007 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/3686 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Meng QingYong,Li AnChun,Li TieGang,et al. Relative paleointensity of the geomagnetic field during the past 200 ka from the West Philippine Sea and its chronological significance[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(8):1115-1126. |
| APA | Meng QingYong,Li AnChun,Li TieGang,Jiang FuQing,&Zhou XiaoJing.(2009).Relative paleointensity of the geomagnetic field during the past 200 ka from the West Philippine Sea and its chronological significance.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(8),1115-1126. |
| MLA | Meng QingYong,et al."Relative paleointensity of the geomagnetic field during the past 200 ka from the West Philippine Sea and its chronological significance".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.8(2009):1115-1126. |
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