Geological Relics Formation Mechanism and Model of the Leye National Geopark, Guangxi
Received date: 2010-01-08
Revised date: 2010-04-08
Online published: 2010-05-25
Supported by
Basic expenses of science research of Institute of Karst Geology, Chinese Aacademy of Geological Sciences,No.2009019,2007016
The paper defines the resource system of Leye geological relics as 7 landscape types, 10 landscape fields, 19 landscape segments, 32 landscape cells and numerous typical landscape entities. On the basis of analysis and investigation about the background of the formation of scenic spots, the formation of scenery in Leye is categorized into four epochs in terms of different geological stages and the typical karst landform formed during the specific geological stage, namely, the epoch of Fengcong, the epoch of underground river and cave, the epoch of Tiankeng and the epoch of modern karst. During the four epochs, as the formation of scenery in Leye is macro-controlled and affected by the cyclical evolution of tectonic movement which involves multiple cycles from tremendously strong to relatively strong, to feeble, finally to stable, and specifically by climatic factors, formation lithology and the process of karst, different "Tectonic-Surface-Climate" responses occur: (1) the S-shaped massif always grows from both surface and underground; (2) the clastic rock massif mostly develops from the surface. However, both of the formation processes evolve in the same direction, starting from the anisotropic, scattered and independent system to the anisotropic, sole network system, finally to the uniform network system. During these four epochs, the clastic rock massif always serves as the base level of erosion and drainage of the S-shaped massif; the two massifs always exert mutual restriction and influence on the direction, intension and dimensions of formation of their own, which is quite similar to the mode between island and ocean. Based on the above-mentioned process and mechanism, the paper puts forward the island-style model of formation for Leye geological relics.
Key words： geological relics; formation mechanism; formation model; Guangxi; Leye
WEI Yuelong; CHEN Weihai; HUANG Baojian . Geological Relics Formation Mechanism and Model of the Leye National Geopark, Guangxi[J]. Acta Geographica Sinica, 2010 , 65(5) : 580 -594 . DOI: 10.11821/xb201005007
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