Different Deformation Stages of the Dabieshan Mountains and UHP Rocks Exhumation Mechanism
DOI:
Author:
Affiliation:

Clc Number:

P588.3

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    On the basis of the authors' research, the Dabieshan Mountains is divided into three tectonic domains; the South Dabieshan, Central Dabieshan and North Dabieshan domains. The South Dabieshan domain consists of autochthonous stacked strata, which are, from top to bottom, Da sedimentary cover of unmetamorphosed Sinian-Early Triassic series, unconformably overlain by Jurassic sandstone, 2) weakly metamorphosed Neo-Proterozoic slate, 3) " Susong group", most of which had been retrogressed into greenschist facies, 4) al-lochthonous block consisting of gneiss and UHP eclogite, 5) autochthonous gneiss which has never been subjected to UHP metamorphism. All these units exhibit a NW-SE lineation. The NW-directed shearing on the top of the unit was reworked by later folds. The central Dabieshan domain is a migmatitic dome resulting from migmatization that the UHP metamorphosed terrane had experienced. Its boundary with the HUP terrane is a detachment fault, which is responsible for the exhumation of the UHP unit during its retrogression into amphi-bolite facies. In the north Dabieshan domain, early foliation and N-S-trending compressional lineation are deformed by N-verging folds coeval to the syn-exhumation ductile structures of the central Dabieshan domain. A geodynamic model involving coeval thrusting and normal faulting is discussed.

    Reference
    Related
    Cited by
Get Citation

LIN Wei, WANG Qingchen, Michel Faure, SUN Yan, SHU Liangshu, Urs Scharer Laboratory of Lithosphere Tectonic Evolution, Institute of Geology, Geophysics, Chinese Academy of Sciences, Beijing, Dept des Sciences de la Terre, University d''''Orleans, UMR ,.2003. Different Deformation Stages of the Dabieshan Mountains and UHP Rocks Exhumation Mechanism[J]. Acta Geologica Sinica,77(1):44-

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:
  • Revised:
  • Adopted:
  • Online:
  • Published: