罗书文, 邓亚东, 黄保健. 广西田东棋盘滩地质奇观的形成机理[J]. 华南师范大学学报(自然科学版), 2016, 48(4): 71-76. doi: 10.6054/j.jscnun.2015.12.001
引用本文: 罗书文, 邓亚东, 黄保健. 广西田东棋盘滩地质奇观的形成机理[J]. 华南师范大学学报(自然科学版), 2016, 48(4): 71-76. doi: 10.6054/j.jscnun.2015.12.001
LUO Shuwen*, DENG Yadong, HUANG Baojian. Formation Mechanization of Chessboard River Bed Geological Wonders in Tian Dong County, Guangxi, China[J]. Journal of South China Normal University (Natural Science Edition), 2016, 48(4): 71-76. doi: 10.6054/j.jscnun.2015.12.001
Citation: LUO Shuwen*, DENG Yadong, HUANG Baojian. Formation Mechanization of Chessboard River Bed Geological Wonders in Tian Dong County, Guangxi, China[J]. Journal of South China Normal University (Natural Science Edition), 2016, 48(4): 71-76. doi: 10.6054/j.jscnun.2015.12.001

广西田东棋盘滩地质奇观的形成机理

Formation Mechanization of Chessboard River Bed Geological Wonders in Tian Dong County, Guangxi, China

  • 摘要: 广西田东那拔镇那拔河的河床上有1处发育大小在0.25~3.00 m2之间、面积为15 600 m2的水平棋盘状基岩石块的地质奇观. 在实地调查其发育区内的地层、岩性、地质构造及地形地貌等自然条件基础上,通过统计分析构造节理的发育规律,对比分析棋盘滩附近具有相同地质基础的那拔河不同河段,得到以下结论:砂岩在侧力作用下发育X张性节理的特性是棋盘滩形成的物质基础与前提;河流特殊的水文条件是棋盘滩形成的主要动力;水平构造和喇叭状河床地貌是棋盘滩形成、保存下来的重要控制因子.

     

    Abstract: There are geological wonders of level chessboard bedrock stones of which the development size is 0.25~3.00 m2 and the area is 15 600 m2 on Naba riverbed of Naba town of Guangxi Tiandong. Based on surveying the national conditions, such as stratum, lithology, geologic structure, landform and the topographic features in the deve-lopment area, the statistical analysis results show that X-extension joint feature of sandstone under the side force effect is the precondition and base to form the materials. The statistical analysis incudes counting the developing rules of tectonic joint and comparing different river beaches of Naba River around chessboard beach with the same geological base. The special hydrologic condition of the river is the main force forming the chessboard beach; and the horizontal structure and the trumpet riverbed landform are important control factors for forming and storing the chessboard beach.

     

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