音频大地电磁法勘查甘肃省高台隐伏隆起

Audio Magnetotelluric Survey Gaotai Upheaval in Gansu Province

查明高台隐伏隆起有助于研究山盆接触关系和确定盆地的边界。通过对高台隆起区地质资料的分析,选择音频大地电磁法在隆起区进行勘查。结果表明,高台隐伏隆起为北山隆起向盆地逆冲的延续,隆起区前缘近似扇形,隆起区内部又分为东西两部分,西边部分高台县城为花岗岩基底,东部为震旦系砂岩基底。研究结果验证了高台隆起属于构造应力的起因,为详细划分酒泉东盆地和张掖盆地的南部边界提供了依据,为区域内的水文地质分析提供了基础资料。

Ascertaining the distribution and form of Gaotai buried uplift is helpful to study the contact relationship between the basin and mountain and to determine the boundaries of the basin.Based on the analysis of the geological data of the Gaotai uplift area,the AMT method was selected to conduct exploration work in the uplift area.The survey results indicate that the Gaotai buried uplift is a continuation of the north hill uplift to the basin thrust.The front edge of the uplift area is approximately fan-shaped.The interior of the uplift area is divided into eastern and western parts.The western part of Gaotai County is a granite basement and the eastern part is the Sinian sandstone basement.The results verify that the Gaotai uplift belongs to the tectonic stress and provides a basis for the detailed division of the southern boundary of the Jiuquan East Basin and the Zhangye Basin.It also provides basic data for hydrogeological analysis in the region.