Mesoproterozoic geomagnetic reversal asymmetry in light of new paleomagnetic and geochronological data for the Häme dyke swarm, Finland: Implications for the Nuna supercontinent
作者: J. SalminenR. KleinT. VeikkolainenS. MertanenI. Mänttäri
作者单位: 1Department of Physics, University of Helsinki, P.O. Box 64, FI-00014, Finland
2Geological Survey of Finland, P.O. Box 96, FI-02151 Espoo, Finland
刊名: Precambrian Research, 2017, Vol.288 , pp.1-22
来源数据库: Elsevier Journal
DOI: 10.1016/j.precamres.2016.11.003
关键词: PaleomagnetismGeochronologyNunaReversal asymmetryGeocentric axial dipole
英文摘要: Abstract(#br)Baltica represents one of the key continents of the Mesoproterozoic supercontinent Nuna forming the core of it together with Laurentia and Siberia. This study presents new geochronological and paleomagnetic data obtained for the Häme diabase dyke swarm in southern Finland. New U-Pb (baddeleyite) ages 1642±2Ma and 1647±14Ma for two reversely magnetized dykes are acquired. Demagnetization revealed a dual polarity remanent magnetization direction carried by magnetite. The combined normal (N) and reversed (R) polarity direction for 11 dykes (=sites) is D=355.6°, I=−09.1° (k...
全文获取路径: Elsevier  (合作)
影响因子:4.441 (2012)

  • asymmetry 非对称
  • Finland 芬兰
  • geomagnetic 地磁的
  • swarm 
  • supercontinent 超大陆
  • reversal 倒转
  • dipole 偶极子
  • axial 轴的
  • light