广西乐业国家地质公园地质遗迹成景机制及模式

将乐业地质遗迹划分为7种景型,10种景域,19种景段,32种景元,若干处典型地质遗迹实体.同时在对公园区域成景背景进行分析和研究的基础上,按小同地质时期及形成于该时期的典型岩溶地貌,将公园成景过程划分为:峰从期、地下河和洞穴期、天坑期、现代岩溶作用期.而受构造运动多期由极强→较强→趋弱→平稳周期性演变的宏观控制和影响,及受气候因素、地层岩性和岩溶过程的具体控制和影响,产生不同的"构造-地表过程-气候"响应过程:(1)S岩溶地块,沿地表地下同时发育;(2)碎屑岩地块,多发育于地表;但两者的成景过程沿同一方向演变:各向分散独立成景→各向单→网络式成景→统一网络式成景.期间碎屑岩地块总是S地块的侵蚀基准面和排泄区域,相互制约和影响着各自不同的成景方向、强度和规模,与孤岛和大海间相互制约和影响的过程极为相似,在此基础上提出乐业地质遗迹的孤岛型成景模式.

Geological Relics Formation Mechanism and Model of the Leye National Geopark,Guangxi

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...