New constraints on the variation of the geomagnetic field during the late Neolithic period: Archaeointensity results from Sichuan, southwestern China

DOI Web Site Web Site 被引用文献3件
  • Shuhui Cai
    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
  • Wei Chen
    The Sichuan Provincial Cultural Relics and Archeology Research Institute Chengdu China
  • Lisa Tauxe
    Scripps Institution of Oceanography University of California San Diego California USA
  • Chenglong Deng
    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
  • Huafeng Qin
    Key Laboratory of the Earth and Planetary Physics, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
  • Yongxin Pan
    Key Laboratory of the Earth and Planetary Physics, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
  • Liang Yi
    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
  • Rixiang Zhu
    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China

書誌事項

公開日
2015-04
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/2014jb011618
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>We have carried out an archaeomagnetic study on a late Neolithic locality (Liujiazhai) in Sichuan, southwestern China. We pull together various dating techniques, including radiocarbon analysis, optically stimulated luminescence dating, stratigraphic information as well as archaeological and archaeomagnetic estimations, to constrain the age of the studied samples. Rock magnetic results indicate thermally stable fine‐grained magnetite or titanomagnetite as the dominant magnetic carriers. More than half of the specimens (141/246) in the paleointensity experiment pass the selection criteria and are considered to record robust intensity values. The virtual axial dipole moments range from approximately (2.8 to 7.8) × 10<jats:sup>22</jats:sup> Am<jats:sup>2</jats:sup>with an average of 5.9 × 10<jats:sup>22</jats:sup> Am<jats:sup>2</jats:sup>, indicating that the geomagnetic intensity around 3000 before the Common Era (B.C.E.) is overall lower than the present field intensity (9.8 × 10<jats:sup>22</jats:sup> Am<jats:sup>2</jats:sup>) of this area. The new results from Liujiazhai are generally consistent with the published data of similar age but deviate from the only available model of CALS10k.1b at certain time periods, making them important for future improvements of the model. Those data are significant for constraining the variation of geomagnetic field intensity between ~3100 and 2600 B.C.E. and improving the regional model of eastern Asia.</jats:p>

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