Crustal large-scale serpentinized mantle peridotite body in the Sulu ultrahigh-pressure metamorphic belt, eastern China: Evidence from gravity and magnetic anomalies

Qingsheng Liu*, Ning Qiu, Jianping Zheng, Zhiyong Li, Hongcai Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

From analysis of the geological and geophysical data (gravity, magnetic, seismic and petrophysics), we propose that geophysical anomalies are produced by a serpentinized mantle peridotite body (SMPB) situated in the middle to lower crust in the Sulu Belt. The SMPB was formed by crustal emplacement of mantle peridotites accompanied by ultrahigh-pressure (UHP) metamorphism. Our finding suggests an emplacement mechanism for the serpentinized mantle wedge (SMW), early in the subduction process. This is different from the classic view, which holds that the serpentinized forearc mantle is formed by in situ hydration processes (Blakely etal., 2005). The petrophysical properties of the SMPB are similar to those of the serpentinized forearc mantle or SMW in modern subduction-zones worldwide, but the formation mechanisms for SMPB and SMW are different. This observation is important for understanding the geodynamic processes that operated in the large UHP metamorphic belt in the Dabie-Sulu area, eastern China.

Original languageEnglish
Pages (from-to)190-199
Number of pages10
JournalJournal of Structural Geology
Volume70
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • Deep geodynamics
  • Eastern China
  • Gravity and magnetic anomalies
  • Serpentinized mantle peridotite body
  • Sulu UHP metamorphic belt

Fingerprint

Dive into the research topics of 'Crustal large-scale serpentinized mantle peridotite body in the Sulu ultrahigh-pressure metamorphic belt, eastern China: Evidence from gravity and magnetic anomalies'. Together they form a unique fingerprint.

Cite this