Application Of CSAMT Method In The Exploration Of Uranium Deposits In Jimsar Depression Of Junggar Basin

Junggar basin of uranium geological survey work in the area of evaluation stage, at present, the study area has been carried out for coal survey and pre investigation work,according to the collected data in coalfield drilling of uranium mineralization occurs mainly in the Middle Jurassic Xishanyao Formation in the inner zone and gray sandstone, the next few years is likely to face coal the exploitation of uranium resources, resulting in destruction. So enter the study area to carry out a new round of uranium ore exploration. Moderate depth is a pressing matter of the moment CSAMT(tens of meters to a two thousand meters), the horizontal and vertical resolution, strong anti-interference ability, high production efficiency,and has a sounding profile study on the dual characteristics of the advantages, is to carry out geological stereoscopic mapping, effective means to study the geological structure.Based on collect the previous Junggar basin by geological and geophysical exploration results, the analysis of the geological, hydrological and geophysical characteristics of the study area, the authentication using controlled source audio frequency magnetotelluric method(CSAMT) to obtain the feasibility study on the regional deep electric structure. From west to East in the Jimsar depression were arranged in seven lines, analyzes some measures of how to improve the quality of field data acquisition, such as the selection of measurement parameters,equipment performance test and avoid the interference in the data acquisition and so on. The distortion point out. And document editing, data processing of smoothing, near correction and static correction processing. Inversion using nonlinear conjugate gradient inversion. Method.The method of inversion is fast, high resolution, it is concluded that the effect better data interpretation results map. In the end of this paper, combined with the known geological and geophysical characteristics, borehole data of inference and interpretation. Identified depression basement and Mesozoic and Cenozoic strata buried deep condition and structural characteristics and carry on the horizon identification and classification of deep strata tentatively, ultimately for predicting prospective areas for uranium metallogenesis and prospecting target area, the overall evaluation of resource potential provide geophysical evidence, to achieve the purpose of the study.