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Acta Seismologica Sinica

, Volume 15, Issue 2, pp 143–151 | Cite as

Deep seismic sounding investigation into the deep structure of the magma system in Changbaishan-Tianchi volcanic region

  • Zhang Xian-kang 
  • Zhang Cheng-ke 
  • Zhao Jin-ren 
  • Yang Zhuo-xin 
  • Li Song-lin 
  • Zhang Jian-shi 
  • Liu Bao-feng 
  • Cheng Shuang-xi 
  • Sun Guo-wei 
  • Pan Su-zhen 
Article

Abstract

The magma system of Changbaishan-Tianchi Volcanic region is studied with three-dimensional deep seismic sounding (DSS) technique. The results show that the magma system of Changbaishan-Tianchi volcanic region, mainly characterized by low velocity of P wave, can be divided into three parts in terms of depth. At the depth range of 9–15 km, the distribution of the magma system is characterized by extensiveness, large scale and near-SN orientation. This layer is the major place for magma storage. From the depth of 15 km down to the lower crust, it is characterized by small lateral scale, which indicates the “trace” of magma intrusion from the upper mantle into the crust and also implies that the magma system most probably extends to the upper mantle, or even deeper. (less than 8–9 km deep), the range of magma distribution is even smaller, centering on an SN-oriented area just north of the Tianchi crater. If low velocity of P wave is related to the magma system, it then reflects that the magma here is still in a state of relatively high temperature. In this sense, the magma system of Changbaishan-Tianchi volcanic region is at least not “remains”, in other words, it is in an “active” state.

Key words

Changbaishan-Tianchi volcanic region 3-D deep seismic sound magma system 

CLC number

P313.2 

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Copyright information

© Acta Seismologica Sinica 2002

Authors and Affiliations

  • Zhang Xian-kang 
    • 1
  • Zhang Cheng-ke 
    • 1
  • Zhao Jin-ren 
    • 1
  • Yang Zhuo-xin 
    • 1
  • Li Song-lin 
    • 1
  • Zhang Jian-shi 
    • 1
  • Liu Bao-feng 
    • 1
  • Cheng Shuang-xi 
    • 1
  • Sun Guo-wei 
    • 1
  • Pan Su-zhen 
    • 1
  1. 1.Research Center of Exploration GeophysicsChina Seismological BureauZhengzhouChina

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