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Volume 40 Issue 5
Oct.  2021
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LUO Shuwen,LV Yong,WU Kehua,et al.Formation mechanism of the spatial distribution of Mesozoic strata in Guilin peak-forest plain and peak-cluster depression[J].Carsologica Sinica,2021,40(05):805-814. doi: 10.11932/karst20210507
Citation: LUO Shuwen,LV Yong,WU Kehua,et al.Formation mechanism of the spatial distribution of Mesozoic strata in Guilin peak-forest plain and peak-cluster depression[J].Carsologica Sinica,2021,40(05):805-814. doi: 10.11932/karst20210507

Formation mechanism of the spatial distribution of Mesozoic strata in Guilin peak-forest plain and peak-cluster depression

doi: 10.11932/karst20210507
Funds:

 [2016]21

 [2019]08

 DD20190022

  • Received Date: 2021-03-30
  • Publish Date: 2021-10-25
  • This paper discusses the causes of the spatial distribution of Mesozoic strata in the peak-forest plain and peak-cluster depression in Guilin, and provides references for clarifying the development and evolution of karst landforms in this city. Based on the structural development history, the change of lithofacies palaeogeographical environment and karst hydrogeomorphic processes in the study area, this paper investigates the characteristics of spatial distribution of strata and landforms so as to analyze the spatial distribution and the formation mechanism of the Mesozoic strata in the peak-forest plain and peak-cluster depression. The study shows that the Triassic strata and the Cretaceous strata cover the Devonian strata, and the Permian and Jurassic strata are missing in the middle. During the Middle Triassic, the crust was uplifted and the upper Triassic and Permian strata were completely eroded,and the study area was in the denudation period during the Jurassic period, which resulted in the loss of strata in two periods. Besides, the residual strata of Triassic and Cretaceous distributing in depressions, valleys, caves, mountainsides and mountain tops which formed in Devonian strata, are mainly in negative topography developing in the middle Triassic and Jurassic karsts, such as tiankengs, depressions, valleys and caves These negative landforms provide space for the late Triassic and Cretaceous sediments. During the developing process of modern karst landform,these negative karst landforms carry the overlying strata to the depth , thus forming a relationship different from normal stratum contact. Meanwhile, these negative landforms, as residues till today, provide the place to avoid denudation for their accumulation or sedimentation in the inner Triassic and Cretaceous strata.

     

  • LUO Shuwen,LV Yong,WU Kehua,et al.Formation mechanism of the spatial distribution of Mesozoic strata in Guilin peak-forest plain and peak-cluster depression[J].Carsologica Sinica,2021,40(05):805-814.
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