| 不可溶盖层下石林的岩溶动力学特征对比研究 |
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| 关键词:basaltic cover Tertiary cover karst dynamics |
| 基金项目:石林研究基金“路南石林非可溶岩盖层下的岩溶动力学研究”，国土资源部岩溶动力学开放研究实验室 |
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| 摘要: |
| A Comparison of Karst Dynamics Features between Stone Forests under Insoluble Covers |
| Using karst dynamics theory and methods, the authors made a comparative investigation on karst dynamics features of Stone Forests under basaltic and Tertiary covers in Shilin area, Yunnan Province. The results demonstrate that CO 2 concentration in air under the basaltic cover shows obvious seasonal variation and a two way variation gradient, while in air under the Tertiary cover, the concentration decreases with depth without obvious seasonal variations. The water in the basalt is erosive to carbonate in rainy and dry seasons, whereas the water in the Tertiary cover is saturated in dry season. The biggest fissure permeability tensor of the basalt is larger than that of the Tertiary, while the largest dip angle of the main axis of the basaltic fracture is smaller. The solution amount of limestone per one hundred days in the basaltic cover is 14～22 times that in the Tertiary cover. All these characteristics suggest the frequent development of Stone Forests under the basaltic cover and account for the frequent spatial association of Stone Forests with basalts. |
| XIE Yun-qiu,YUAN Dao-xian.2004.A Comparison of Karst Dynamics Features between Stone Forests under Insoluble Covers[J].Acta Geoscientica Sinica,25(1):59-62. |
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