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Speleogenesis of Selected Caves beneath the Lunan Shilin and Caves of Fenglin Karst in Qiubei, Yunnan

Acta Geologica Sinica(English Edition) 2004年第6期78卷 1289-1298页

作者： StankaSEBELA TadejSLABE LIUHong PetrPRUNER karstresearchinstitutezrcsazu Titovtrg26230PostojnaSlovenia Nature＆CultureConservationCenter ChinaExplorationandResearchSocietyYunnanInstituteofGeographyNo.20XuefuRoadKunmingYunnan650223China InstituteofGeology AcademyofSciencesoftheCzechRepublicRozvojova13516502PragueCzechRepublic

Yunnan is famous for its attractive karst landscapes especially shilins, fengcong and fenglin. The development of caves beneath the shilins in the vicinity of Lunan is closely connected with the formation of shilins. Most of the waters percolating through shilins run through the caves beneath them and are responsible for their formation. The study of cave speleogenesis deepens knowledge about both the development of shilins and karst structure. In the vicinity of the Lunan Shilin, speleological, morphological and structural geological studies of four karst caves have been accomplished. At Puzhehei, Qiubei, which is characterised by numerous fenglin, fengcong and caves, speleological and morphological studies have been performed. Cave sediments for paleomagnetic analyses have been taken from all studied areas (samples CH 1-9). Karst caves in SE Yunnan are probably much older than the age of the cave sediments (<780,000 years B.P.). The studied areas are located in the vicinity of the Xiaojiang fault (N-S direction I and the Red River fault (NW-SE direction). The general directions of both active faults are assumed to influence the direction of the most frequent fissures as well as the cave passages near the Lunan Shilin. The Xiaojiang fault more strongly influences cave passage orientation, while the more distant Red River fault most strongly influences fissure orientation.

关键词： speleogenesis geological structure karst paleomagnetic analysis of cave sediments Yunnan China.

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