Method for searching covered-area skarn-type copper-gold deposit by means of high-precision gravitational prospecting

Abstract

The invention discloses a method for searching covered-area skarn-type copper-gold deposit by means of high-precision gravitational prospecting. The method comprises the steps of compiling a metallogenic formation construction drawing through analyzing a metallogenetic geological condition; defining an ore searching target area; performing 1/10000 high-precision gravity measurement, and defining a skarn alteration area range; performing steps such as drilling and mineral reserve verifying for gradually reducing a target range, and realizing accurate ore searching. Compared with the prior art, the method is advantageous in that the skarn range of the covered area is defined according to residual gravity abnormity, thereby realizing a purpose of indirect ore searching. The invention provides the method for searching the covered-area skarn-type copper-gold deposit for filling related gaps. According to a gravitational prospecting principle, the invention provides the method for searching the covered-area skarn-type copper-gold deposit by means of a high-precision gravimetric prospecting method. According to the residual gravity abnormity, the skarn range is defined. The method for searching covered-area skarn-type copper-gold deposit by means of the high-precision gravimetric prospecting method is firstly realized in China.

Description

technical field [0001] The invention relates to the technical field of geophysical prospecting, in particular to a method for finding skarn-type copper-gold deposits in coverage areas by using high-precision gravity prospecting. Background technique [0002] Skarn-type deposits occur in the contact zone between rock mass and carbonate rock. Skarnization is the main mineralized alteration sign. If through the analysis of metallogenic conditions and the study of metallogenic laws, if it is believed that there are skarn-type copper-gold ore-forming conditions in the exploration area, the stratum and structure can be ascertained through geological survey, geochemical survey, mountain engineering and other methods. According to the situation and the scope of skarnization alteration, and then optimize the prospecting target area and determine the drilling hole location, so as to discover gold deposits. If in the overburden area, due to the cover of the overburden layer, ground g...

AI Technical Summary

Problems solved by technology

If in the overburden area, due to the cover of the overburden layer, ground geological mapping methods and mountain engineering methods cannot be used to directly observe the stratum, structure, surrounding rock alteration, etc. under the overburden layer; nor can the geochemical scanning survey method be used. Because the shielding effect of the covering layer hinders the migration of geochemical exploration elements; the use of geophysical prospecting methods such as electrical prospecting is not effective, because the shielding effect of the covering layer's low resistance affects or weakens the transmission of geophysical electromagnetic signals

[0003] Therefore, to find skarn-type copper-gold deposits in the covered area, geological survey methods, geochemical survey methods and mountain engineering methods cannot be carried out, and the effect of geophysical and electrical methods is not good, and the prospecting target area cannot be delineated. Drilling methods alone, Finding mines is difficult

[0004] It can be seen that in the search for skarn-type copper-gold deposits in the covered area, there is a lack of effective means to delineate the scope of skarnization alteration, which makes it difficult to select ore-prospecting target areas, to locate drilling holes, and to find ores.

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