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Method for surveying blind deposit with solid tide piezo-electric effect and spontaneous potential

A technology of natural potential and concealed deposits, applied in the field of surveying concealed deposits, can solve problems such as high construction costs, no ability to predict depth, and unpredictability

Inactive Publication Date: 2007-09-19
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional piezoelectric method can generate obvious electrical signals on the quartz veins, this method has no depth prediction ability, that is to say, it cannot predict whether there is a mine in a certain part of the deep, so it has been gradually developed since the 1990s. disappeared
[0007] Although the electromagnetic method has a large exploration depth and can obtain a resistivity profile, the construction cost is high, and the resolution is difficult to reach the meter level, especially for vein-shaped ore bodies.

Method used

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  • Method for surveying blind deposit with solid tide piezo-electric effect and spontaneous potential
  • Method for surveying blind deposit with solid tide piezo-electric effect and spontaneous potential
  • Method for surveying blind deposit with solid tide piezo-electric effect and spontaneous potential

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Experimental program
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Effect test

Embodiment 1

[0039] As shown in Figure 1, assuming that a gold-bearing quartz vein (QZ) is concealed on the left side of the figure (covering the loess layer), it is traditionally required to use drilling or trenching to prove its existence. The disadvantages of this method It is low efficiency and high cost.

[0040] However, the present invention can directly investigate whether the quartz vein QZ exists without drilling or digging a groove, so as to achieve the purpose of exploration, and it is convenient and easy:

[0041] Arrange multiple pairs (2 pairs in this example) of non-polarized electrodes on the surface, and then conduct potential observations on these electrode pairs at high solid tide and low solid tide, and each pair of electrodes will obtain two observation results, namely Potential V at orgasm H and the potential V at low tide L . Use the following formula to get a new anomaly coefficient, that is, the solid tidal piezoelectric anomaly coefficient Y L :

[0042] ...

Embodiment 1

[0053] Embodiment one, laboratory test result analysis

[0054] Hao Jinqi et al. (2004) analyzed 4 experimental samples in the article "New results of self-potential change experiment of rock samples under biaxial pressure", using granite and gabbro samples with a size of 30cm×30cm×2.8cm. Under the action of pressure, the potential change on the surface of the test sample is tested, and the results show that: when the strain is 2*10 -6 On the order of magnitude, the piezoelectric voltage that can be generated is on the order of 2mv. Since the sample scale used is 0.3m, the unit meter strain is 6*10 -6 , the corresponding piezoelectric voltage is on the order of 2-5mv.

[0055] On the other hand, GPS measurements show that the solid crust also has tidal amplitudes of around 0.5 meters. And the radius of the earth R=6300*10 3 =6.3*10 5 m, semicircle side length C=4*10 7 m. That is, strain per meter = 0.5 / C = 1.25*10 -8 Magnitude. If measured with a 100m electrode distan...

Embodiment 2

[0057] Embodiment two, the preliminary application example in Xinjiang Hami Tulagen copper-nickel mine:

[0058] The Tulargen copper-nickel deposit is located about 310km east of Hami City. It was originally discovered by Xinjiang Nonferrous Metallurgy Team 704 in 2001 during the inspection of geochemical anomalies. It is an ultrabasic rock-type copper-nickel deposit with whole-rock mineralization. The discovered ore-bearing rock body is distributed in the northeast-east direction, about 700 meters long and 50-70 meters wide; in order to further find out the extension, shape and distribution of the ore-bearing rock mass and the metallogenic law, the inventors respectively In 2003 and 2004, the method of magnetotelluric sounding (MT) was used to carry out the survey work of more than 40 measuring points, and a new north ore belt with better ore-bearing was found.

[0059] The Gms-06 magnetotelluric sounding system produced by the German Metronix company was used in the work. I...

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Abstract

A method for surveying and prospecting the blind deposit through the solid tide piezoeffect and natural potential, its steps are as below: a) in the survey area, arrange the non-polarizable electrode according to the gridding method, the buried depth and requirements must be similar with that for natural potential survey method; b) fulfill the twice potential measurement for these arranged electrodes, in which, one measurement is carried out at high solid tide, the other is carried out at the low solid tide; c) calculate the solid tide piezoelectric abnormal constant according to the measured potential results; at the section with blind deposit, the difference between the high solid tide potential and low solid tide potential is very high; at the section without blind deposit, the difference between the high solid tide potential and low solid tide potential is very low. The invention utilizes the piezoeffect principle, combine the piezoeffect caused by the solid tide with the natural potential measurement, it is an effective method for direct surveying the quartz-vein gold and other deposits (with piezoeffect).

Description

technical field [0001] The invention relates to a method for surveying hidden ore deposits, in particular to a principle of piezoelectric effect, which combines the solid tidal piezoelectric effect and natural potential measurement, and uses the solid tidal piezoelectric effect and natural potential measurement to directly explore quartz veins Type gold ore and other types of metal ore and non-metallic ore methods. Background technique [0002] In the exploration of concealed ore deposits, especially in the exploration of quartz vein type gold deposits, it is usually difficult to obtain good results using traditional geophysical exploration methods (gravity, magnetic, electrical, seismic, etc.), the main reason is that these geophysical methods It is difficult to meet the requirements of the resolution (such as exploration of quartz vein gold deposits with a thickness of tens of centimeters to several meters), and sometimes the geophysical lithology parameters (density, magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/00
Inventor 梁光河刘洪臣祁凤茹蔡新平张宝林徐兴旺秦克章王杰
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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