Anisotropy of magnetic susceptibility and identification of tilted sediment cores from the Bohai Sea

Chen Hao; Sun Wei-min; Zhang Hong-cai

doi:10.1007/BF02850370

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Anisotropy of magnetic susceptibility and identification of tilted sediment cores from the Bohai Sea

Updated：2023-05-16

- Anisotropy of magnetic susceptibility and identification of tilted sediment cores from the Bohai Sea
- Journal of Oceanology and Limnology Vol. 14, Issue 2, Pages: 135-140(1996)
- Affiliations：
  
  1. Dept of Geology and Geophysics University of Edinburgh
  2. Institute of Oceanology
- Author bio：
- Funds：
- DOI：10.1007/BF02850370
  CLC：
- Online First：31 January 2013，
  
  Published：1996
- Accepted：
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Hao, C., Wei-min, S. & Hong-cai, Z. Anisotropy of magnetic susceptibility and identification of tilted sediment cores from the Bohai Sea., Chin. J. Ocean. Limnol. 14, 135–140 (1996). https://doi.org/10.1007/BF02850370
DOI：

Hao, C., Wei-min, S. & Hong-cai, Z. Anisotropy of magnetic susceptibility and identification of tilted sediment cores from the Bohai Sea., Chin. J. Ocean. Limnol. 14, 135–140 (1996). https://doi.org/10.1007/BF02850370 DOI：

摘要

Abstract

Anisotropy of magnetic susceptibility (AMS) is a well-developed technique increasingly used in petro-fabric determination. Its application to two Mackereth cores JX91-2A and JX91-2B

taken from the same site in the central Bohai Sea

revealed 3D magnetic fabrics of the sediments as expressed with susceptibility ellipsoids. The flat seafloor and the relatively quiet depositional environment in the semi-isolated Bohai Sea should result in a primary fabric with horizontally oblate susceptibility ellipsoids. Moreover

the increasing downcore total anisotropy comprising mainly of magnetic foliation resulting from sediment compaction should also lead to flat ellipsoids. Therefore

the off-pole mean directions of minimum axes of susceptibility ellipsoids on stereonets must indicate that the two cores are tilted relative to the flat seafloor. Use of Fisher statistics showed the tilt angles to be 14° for JX91-2A and 23° for JX91-2B from which the true depths of the cores were decided accordingly.

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references

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