| 湖南道县铁锰矿区岩溶发育影响因素分析 |
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| 引用本文： | 陈亮晶,姚腾飞,周鑫.湖南道县铁锰矿区岩溶发育影响因素分析[J].中国岩溶,2012,31(3):240-247. |
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| 作者姓名： | 陈亮晶 姚腾飞 周鑫 |
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| 作者单位： | 1.湖南省地质建设工程(集团)总公司；湖南省地勘局402队；湖南省勘测设计院 |
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| 基金项目： | 湖南省勘察设计院课题（编号：hncy2007029）致谢：在本文撰写修改过程中得到了韦复才研究员细致的指正和帮助,在此表示衷心感谢. |
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| 摘 要： | 湖南道县铁锰矿区岩溶发育主要受地层岩性、地形地貌、断裂构造等因素的控制,岩溶形态主要有溶洞、暗河、溶沟、溶槽、漏斗、落水洞和溶蚀洼地等,岩溶非均一性特征明显。在地层岩性上,以矿区CaO含量最高的上泥盆统佘田桥组和锡矿山组下段二至四层白云质灰岩、白云岩与锡矿山组下段第一层泥灰岩、泥质灰岩隔水层交界部位岩溶最为发育,佘田桥组见溶洞260个,占总溶洞数的96.7%。在平面上,岩溶以中部及北部地势平坦的覆盖岩溶区最为发育,见洞率54.8%,其次是岩石裸露的东部及南部低山丘陵区,矿区南部见洞率40.4%。在垂向上,由浅及深岩溶发育由强至弱,标高0~220m钻孔揭露溶洞237个,占溶洞总数的86.5%,-150~0m揭露溶洞28个,占溶洞总数的10.2%,-400m以下无溶洞及溶蚀现象。在地质构造上,断裂及其影响带岩溶较发育,断裂带见溶洞209个,占总见洞数的76.3%,且溶洞充填率较高。
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| 关 键 词： | 岩溶 发育规律 影响因素 铁锰矿区 湖南 |
| 收稿时间： | 2012/3/27 0:00:00 |
Analysis on impact factors of karst development in Dao County iron and manganese mining area of Hunan |
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| CHEN Liang-jing,YAO Teng-fei and ZHOU Xin.Analysis on impact factors of karst development in Dao County iron and manganese mining area of Hunan[J].Carsologica Sinica,2012,31(3):240-247. |
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| Authors: | CHEN Liang-jing YAO Teng-fei and ZHOU Xin |
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| Institution: | 1.Hunan Geological Engineering Corporation；402 Geological Prospecting Party, Changsha；Hunan Institute of Survey and Design2.402 Geological Prospecting Party, Changsha；Hunan Institute of Survey and Design3.402 Geological Prospecting Party, Changsha |
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| Abstract: | The karst development at iron-manganese mining area in Dao County, Hunan Province is mainly controlled by lithology, landform and fracture. There are many forms of karst landforms, including cave, underground river, karren, groove, funnel, ponor and uvala, with obviously heterogeneity features. Karst is most developed, one in the 2nd-4th layer dolomitic limestone and dolomite of the Shetianqiao Group and the Xikuangshan Group of the upper Devonian system that having the highest CaO content~ and another in the aquiclude junction of between marl and argillaceous limestone of the Xikuangshan Group lower members. There are 260 caves in the Shetianqiao Group, that accounting for 96.7 % of the total. In plane view, the karst is the most developed in the covered karst flat area at the central and the northern parts with 54.8 % of cave ratio; the next developed of karst is in the karst-hills at the eastern and southern parts with 40.4 % of cave ratio. Vertically, the karst growth gets weaker with depth,237 caves, accounting for 86.5 % of the total, are uncovered by drill at 0-220 m in elevation; and 28 caves, accounting for 10.2 % of the total, are uncovered by drill at -150-0 m; but no caves or corrosion below -400 m. Tectonically, fracture zone affects karst development. There are 209 caves with relatively high cave filling ratio, accounting for 76.3 % of the total, along the fracture zone. |
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| Keywords: | karst development law impact factors iron and manganese mining area Hunan |
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