西南石油大学学报(自然科学版)

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Reconstruction of Devonian Lithofacies Palaeogeography in
Hunan and Guangxi Provinces

Yang Huaiyu   

  1. Geological Science Research Institute,Shengli Oilfield Branch Company,SINOPEC,Dongying,Shandong 257015,China
  • Online:2014-02-01 Published:2014-02-01

Abstract:

The regions of Hunan and Guangxi,which were in the composite position intersected by a variety of Tectonic system
in Devonian,and developed a unique“platform- depression-dome-basin”sedimentary system. Formation of Devonian were
eroded badly in Hunan and Guangxi Provinces,which merely remained in Nanpanjiang depression,Qianxinan depression,middle
and west of the Guizhong depression,Shiwanshan Basin and Xiangzhong depression. Researching on various sedimentary
facies symbol in residual formation,9 types of sedimentary facies were recognized,which dominated in the marine environment.
The followed conclusions were obtained from the difference comparison of sedimentary environment:Nanpanjiang
depression and Guizhong depression are mainly of depression-platform sedimentary system;Xiangzhong depression is mainly
of clastic tidal flat and restricted(open)platform sedimentary system,and Shiwanshan basin is mainly of undercompensation
basin. Sedimentary mode of study area was displays the feature“depression surrounded platform,depression connected”. Facies
differential degree of sedimentary evolution,the tectonic movement and magmatic activity have good sedimentary response
relation.

Key words: regions of Hunan and Guangxi province, Devonian, lithofacies palaeogeography, sedimentary mode, sedimentary
response