摘要
通过在贵州石阡青阳地区选择锰矿勘查程度较高、周缘含锰岩系出露较好、深部埋藏较为完整的矿区,按照200米点距布置测线开展音频大地电磁(AMT)测量工作,获取测区2.5千米深部电性结构模型。参考研究区及邻区已有地质地球物理成果及钻井等资料,遵循"大塘坡"式锰矿赋存的地层构造特征,对电性结构开展地质地球物理综合解释。大地电磁勘探成果查明了成锰槽盆的深部结构形态及含锰岩系的大致空间位置。
The audiomagnetotelluric(AMT) survey is carried out by selecting the mining area with high degree of manganese exploration, good exposure of surrounding manganese-bearing rock series and relatively complete deep burial in Shiqian Qingyang area of Guizhou Province, and the survey line is arranged according to the distance of 200 m points. The electrical structure model of 2.5 km deep in the survey area is obtained. Referring to the existing geological and geophysical results and drilling data in the study area and its adjacent areas, and following the stratigraphic and structural characteristics of the "Datangpo" type manganese ore, a comprehensive interpretation of the geological and geophysical structure of the electrical structure is carried out. The results of audiomagnetotelluric methodshow the deep structure of the manganese trough basin and the approximate spatial position of the manganesebearing rock series.
引文
[1]周明平,杨炳南,朱大伟,等.贵州省松桃县普觉锰矿区EH4大地电磁法试探效果[J].贵州地质,2013,30(01):28-32.
[2]舒多友,张命桥,叶飞,等.贵州石阡公鹅屯-青阳地区钒矿地质特征及找矿标志[J].贵州地质,2011,28(02):114-117+140.
[3]杨炳南,周琦,杜远生,等.音频大地电磁法对深部隐伏构造的识别与应用:以贵州省松桃县李家湾锰矿为例[J].地质科技情报,2015,34(06):26-32.
[4]杨炳南,王家俊,何彦南,等.黔西南层控卡林型金矿床电性结构特征——水银洞剖面音频大地电磁测深研究[J].贵州地质,2016,33(01):1-7+13.
[5]胡兆,龚联瓒,杨绳武,等.贵州石阡奥陶-志留系分界地层新知[J].地层学杂志,1983(02):140-142+162.2线初步解释结果