西藏高原南部雅鲁藏布江缝合带地区地壳电性结构研究

Translated title of the contribution: Crustal electrical conductivity structure beneath the Yarlung Zangbo Jiang suture in the southern Xizang plateau

Han Dong Tan*, Wen Bo Wei, Martyn Unsworth, Ming Deng, Sheng Jin, John Booker, Alan Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

To study the structure in the shallow and deep crust along the east-west and north-south direction beneath the Yarlung Zangbo Jiang suture in the southern part of Xizang plateau, three magnetotelluric profiles with super-wide band of frequencies (Cona-Maizhokunggar, Yadong-Xuegula, Gyirong-Coqên) across the Yarlung Zangbo Jiang suture were deployed. The result shows that large-scale high resistive bodies exist near the Yaluzangbu suture surface, which extend to the maximum depth of more than 30km. They are the reflection of the Gangdese granite. There are small-scale conductive bodies in the southern part of the Yarlung Zangbo Jiang suture, and large-scale ones under the suture and in the northern part. Conductive bodies widely spread in the crust from south to north along the profiles. They are discontinuous with each other, and become larger in scale from south to north. They decline to the north, and are the steepest near the suture becoming deeper gradually from about 20km depth in the south part to about 70km depth in the middle of the suture. Under the Yarlung Zangbo Jiang suture, the conductive bodies becomes larger in scale, more conductive gradually from west to east. These important electrical characters are possibly caused by the India plate underthrusting to the north. The variation in characters of the large-scale conductive bodies from west to east may be the proof that plate collision causes materials moving to the east.

Translated title of the contributionCrustal electrical conductivity structure beneath the Yarlung Zangbo Jiang suture in the southern Xizang plateau
Original languageChinese
Pages (from-to)685-690
Number of pages6
JournalDiqiu Wuli Xuebao
Volume47
Issue number4
Publication statusPublished - Jul 2004
Externally publishedYes

Keywords

  • Electrical conductivity structure
  • Magnetotelluric sounding
  • Southern Xizang Plateau
  • Yarlung Zangbo Jiang suture

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