Origin of the Changbai intraplate volcanism in Northeast China: Evidence from seismic tomography

Dapeng Zhao, Jianshe Lei, Rongyu Tang

Research output: Contribution to journalArticlepeer-review

129 Citations (Scopus)

Abstract

Seismic images of the mantle beneath the active Changbai intraplate volcano in Northeast China determined by teleseismic travel time tomography are presented. The data are measured at a new seismic network consisting of 19 portable stations and 3 permanent stations. The results show a columnar low-velocity (-3%) anomaly extending to 400 km depth under the Changbai volcano. High velocity anomalies are visible in the mantle transition zone, and deep earthquakes occur at depths of 500-600 km under the region, suggesting that the subducting Pacific slab is stagnant in the transition zone, as imaged clearly also by global tomography. These results suggest that the Changbai intraplate volcano is not a hotspot like Hawaii but a kind of back-arc volcano related to the upwelling of hot asthenospheric materials associated with the deep subduction and stagnancy of the Pacific slab under northeast Asia.

Original languageEnglish
Pages (from-to)1401-1408
Number of pages8
JournalChinese Science Bulletin
Volume49
Issue number13
DOIs
Publication statusPublished - 2004
Externally publishedYes

Keywords

  • Changbai volcano
  • Intraplate volcanism
  • Subducting slab
  • Teleseismic tomography

ASJC Scopus subject areas

  • General

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