摘要
云南省蒙自市草坝东山区三叠系中统碳酸盐岩广泛分布,地表出露岩性单一,岩溶现象强烈发育。通过野外岩溶形态、岩石节理裂隙、地质构造、地层岩性等的调查,对草坝东山的岩溶形态进行统计;并进一步研究草坝东山岩溶发育的影响因素,得到了草坝东山岩溶发育的基本特征及规律。岩溶发育与岩性密切相关,主要表现为含灰岩的三叠系永宁镇组岩溶最为发育,含白云岩及白云质灰岩的三叠系个旧组岩溶发育较弱。岩溶总体发育方向与裂隙发育的优势方向一致,岩溶洞穴成层发育,塌陷的排列、落水洞的展布和倾斜方向、漏斗、洼地的长轴方向均与构造线方向一致。岩溶发育具有强度不均一性,区内岩溶发育大致分为3带即垂直入渗带、季节变动带、水平径流带。
The carbonate of the Midle Triassic in the CabaDongshan area of Mengzi City, Yunnan Province are widely distributed and the karst phenomena are strongly developed. The surface is exposed to a single lithology,The karst form of the CaobaDongshan area statistics by the field karst morphology, rock joint fissures, geological structure, stratigraphic lithology and other investigation. And further study the influencing factors of karst development in the steppe of the dam, and obtain the basic characteristics and regularity of the karst development of the dam in Caoba. The karst development is closely related to the lithology, the karst formation of the Triassic Yongning town group, which is mainly composed of limestone, is the most developed karst, and the sediments of the Triassic group of dolomite and dolomitic limestone are weaker. The general development direction of karst is consistent with the direction of fissure development. Karst cave stratification development,the arrangement of collapses,the distribution and the vergence direction of the swallow hole, funnel, the long axis of the depressions is consistent with the direction of the tectonic line. Karst development has intensity inhomogeneity,the karst development has intensity inhomogeneity divided into three regions： vertical permeation zone, seasonal variation zone, transverse runoff zone.
出处
《地质灾害与环境保护》
2017年第4期44-48,共5页
Journal of Geological Hazards and Environment Preservation
关键词
草坝东山
岩溶发育
规律研究
CabaDongshan
Karst development
regular research
