Study Of3D Geological Model Based On TEM Data And Study On Reliability Evaluation

With the development of the society, the nature of occurrence of the mineral resources are becoming less and less, seeking for concealed orebody has been current geological workers face the inevitable choice.Transient electromagnetic method because of its in deep prospecting for concealed orebody and the superiority, has been in the actual exploration of mineral resources play a more and more important role.Compared with other method, transient electromagnetic method has high penetration resistance ability, artificial source random interference effects of small, simple, abundant information, high precision, economy, quick wait for an advantage, it is widely application and development.However, and its advantages, transient electromagnetic method to the inversion of shortage is very obvious.TEM inversion interpretation of magnetotelluric data refers to the geophysical interpretation.Transient electromagnetic method in data interpretation and DC electrical method, divided into two stages, namely the qualitative explanation and quantitative interpretation.Qualitative interpretation mainly through to the original data, analysis and comparison of various qualitative maps, determine the anomaly exists and delineating abnormal body distribution; quantitative interpretation is through the typical profile curve analysis, obtains the time constant, computer simulation and inversion processing methods to obtain anomaly quantitative parameters, such as depth, ore body morphology and conductivity.Because geophysics interpretation is the geological interpretation based, so in order to from the MT data, extracting more effective information, study of TEM inversion interpretation is of importanceThe traditional method of transient electromagnetic inversion is the manifestation of the plan and section or combined profile map expression, can only reflect a certain level (at a certain depth or a line) of the resistivity change.It is difficult to reflect the morphology and distribution of geological body.Use of TEM inversion interpretation of the obtained data for geological body3D visualization research, can more directly and clearly outline the subsurface geological body morphology and distribution range, which in the actual production activities are very important in.In order to evaluate the transient electromagnetic inversion error, based on the transient electromagnetic data to establish a three-dimensional geological model such as abnormal body distribution range, depth, ore body morphology and conductivity and other aspects of the comprehensive evaluation.