Rare metal ore deposit prospecting method based on geological and geophysical technologies

Abstract

The invention provides a rare metal ore deposit prospecting method based on geological and geophysical technologies. Overlapped areas of structure intersection positions, mesozoic igneous rock bodies,high gravity value anomalies, and medium and high magnetic anomalies in province ranges are delineated as metallogenic prospect areas. Through combination of a rock geochemistry anomaly graph, metallogenic target areas of rare metal ore deposits are further delineated. An induced polarization method and high precision magnetic measurement are carried out in the target areas. Isolines of earth surface apparent resistivity and relative magnetic field values are drawn on a map. Overlapped areas of high apparent resistivity and high magnetic field values are delineated as metallogenic enriched sections. Audio magnetotelluric sounding and radon gas radioactive detection are carried out in the sections. Space distribution states of the ore deposits in the sections are delineated according to characteristics of high resistance, high gravity, high magnetic force and high radon gas. Suitable positions are selected for explosion of ore bodies. According to the method, through combination of thegeophysical technology, an ore body is precisely positioned, and a macroscopic to microscopic step-by-step prospecting ideal is embodied.

Description

technical field [0001] The invention relates to the technical field of metal ore deposit exploration, in particular to a rare metal ore prospecting method based on geological and geophysical technology. Background technique [0002] Since 2011, the Ministry of Finance and the Ministry of Natural Resources of my country have taken "three rare (rare earth, rare metal and scattered) resources" as the survey object of national key strategic resources, and the Ministry of Science and Technology and the management agencies of Sichuan, Hunan, Shaanxi and other provinces have successively carried out A series of relevant scientific research and basic geological investigation work have been carried out, and many new achievements and understandings have been obtained. In my country, rare metals mainly include 9 kinds of lithium, niobium, tantalum, rubidium, etc., which have been found in Sichuan, Hunan and other provinces and have good prospects for mineralization. [0003] Among all ...

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Problems solved by technology

[0007] To sum up, although the existing technology has certain feasibility, there are still two deficiencies in the following two aspects: 1. At present, all the work is to conduct fine surveys on small regional points, and there is a lack of a survey from macro to micro, from province to province. The overall idea of ​​gradually narrowing the mining area (mining point) to the mining target area has certain blindness and increased a lot of repetitive work in practical application, which greatly limits the efficiency of ore prospecting; 2. Prospecting for rare metal deposits means that do not carry out a comprehensive study of the combination of technologies and do not take advantage of the physical performance characteristics of geophysical sounding methods

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