Analyses On Anomaly Of High-precision Magnetic Survey And Ore Prospect Evaluation In Allah Teng Obo Areas Of Inner Mongolia

Precision magnetic survey method is an effective way to predict deep concealed ore body, and has made outstanding achievements in non-ferrous metals exploration. Allah Teng obo area is alluvial gold platinum mining areas in the Alxa area, the Previous carried out only 1: 50,000 regional survey work about this areas. With the "Eleventh Five" major scientific and technological support projects, specifications in accordance with national requirements of high-precision magnetic measurement, a 1: 20,000 high-precision magnetic survey work have been done in Allah Teng obo areas.Daily variation of the data by correction, gradient corrected, a high degree of correction and other processing of magnetic anomaly is obtained in the study area. Then the magnetic data processing and conversion, including the smooth handling of the pole, upward continuation, derivative and other methods of treatment. Through various means, the content of the various magnetic body is reflected. Interpretation of transformation and analysis of the treated, the study area has two large positive magnetic anomalies, the two magnetic bodies are east-west direction of the body, the north tendth, and the boundary Basically consistent with the magnetic anomaly boundary, depth than the shallow, the small magnetic body is about 500m depth, the large one is about 1000m depth.By magnetic susceptibility measurements, found that the two magnetic rocks are not caused by itself. Combined with the geological background of the study area, interpretation and analysis of the study area was carried out about the two large magnetic anomalies of geological, found that the two magnetic body are caused by the intrusion of magma magnetic anomaly.The study area 1: 50,000 geochemical data has been dealed with Au, Ag, Cu, Ni, Co and other elements, anomaly threshold set by the traditional method, got an exception by GeoExpl software distribution deal, overlay function using Mapgis, at last, discovered that the Au, Ag, Hg, Co, Hg and other elements were enrichment exception near the magnetic anomalies.Geological conditions, including stratum, intense tectonism, multiple phases of magma intrusion is analysed. Comprehensive analysis of geochemical and geophysical analysis, and the positive anomalies of two magnetic ore prospect evaluation are carried out, finally, delineated the tow magnetic anomalies existed Au, Ag and other metal elements ore prospect.