| The prospecting space is huge in the shallow overly areas.The traditional geological methods can not satisfy the current geological mineral work in these areas.In order to solve this problem,this thesis emphasizes on the detection methods of these areas.Via analysis,we think that the application system of synthetical detecting technological methods are insufficient though the individual technical of the geological mineral detecting work are enough in these areas.In view of this situation,regarding the Dure shallow overly area as the studying object,we develop the studies of the multi-method and multi-information synthetical detection and information interpretation technologies,including geology,geophysics,geochemistry,and shallow drilling.First of all,rock physical properties are systematically classified and counted in Dure.Especially,unusual physical properties provid the property base to the continuous researches of the abnormal qualities.An illustration of this is that a large of magnetite was found in biotite monzogranite with relatively high density and this kind of biotite monzogranite bearing magnetite can cause the relative gravity anomaly of the acid intrusions.In the technological aspect,comparing several conventional separated methods of potential fields,we think matched filtering and upward continuation have a good separation effect on magnetic method and gravity data.Based on this,we recognized and extracted the demarcation line of physical properties utilizing improved " skeleton algorithm ",simulated the spatial morphology of different geological bodies using 3-D inversion technique of gravity and magnetic properties,and built up geology-and geophysics-model combining property analysis.In the geological theoretical aspect,using regional 200,000 gravity and magnetic data,we inverted the depth of Moho and Curie and analyzed the relationship between the deep surface and mineralization.Based on mineralization geochronology,we analyzed and concluded mineralized setting and regularity which can afford the theoretical foundation for the future studies.Regarding the theoretical achievements as the guidance,combining with data of electromagnetic,seismic and shallow,we interpreted in detail the geological and geophysical model.First,we recognized 59 hidden structures,analyzed the questions on the structural identification,and applied the preliminary solutions for these questions.Second,we recognized 37 hidden structures,promoted identification marks,and analyzed the questions during the identification.Third,we furtherly fell Dure into four geological units with the information of structures and rock bodies,and preliminarily completed the geological map of bed rocks with special interpretation technology of geological units and anomalous inference.Based on the above,mineral resources,deposit types,and ore prospecting preliminarily were built up in the four main geological units via comparing to the regional mineralized characteristics.Two prospective areas were preliminarily delineated via the informational analysis of lithologic alteration and elemental abnormity revealed by shallow drilling geochemical exploration.Five prospecting target areas were delineated via analogizing the comprehensive geophysical and chemical anomalies of the adjacent regions.A set of comprehensive detecting technological system,from the shallow area of northern margin of Junggar,regarding the method of geophysical potential field as the main body,constrained by the other geophysical methods,combining with information of geochemistry and shallow drilling,were formed via the experiences of the above studying. |
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