Method for detecting deep geology and sulfide ore resources

A sulfide and resource technology, applied in the field of detection, can solve problems such as unfavorable promotion and application, exploration and detection of sulfide ore body resources, and limitation of practical application, and achieve the effect of improving the exploration effect

Inactive Publication Date: 2018-12-25
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the detection depth of existing geology and sulfide ore body resources is shallow, less than 1000m, and cannot ...

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  • Method for detecting deep geology and sulfide ore resources
  • Method for detecting deep geology and sulfide ore resources

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Embodiment

[0029] like figure 1 As shown, the deep geology and sulfide ore body resource detection method in this embodiment, the working principle is to send a pseudo-randomly coded current signal underground through a finite-length grounding wire current source, and simultaneously observe the electromagnetic field response and record in the axial direction of the emission source The current is emitted, and then the ground impulse response is obtained through deconvolution, and the apparent resistivity is calculated to achieve the purpose of detecting geological targets at different depths;

[0030] In a multi-channel electrical instrument system, the ground is usually regarded as a linear time-invariant system, and the received response voltage v(t) can be expressed as the convolution of the transmitted current and the ground impulse response:

[0031] v(t)=s(t)*g(t)+n(t) (a-1)

[0032] In the formula, g(t) is the system response related to the coded current, the transmitting system a...

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Abstract

The invention discloses a method for detecting deep geology and sulfide ore resources, the method comprises the steps of: transmitting a pseudo random transmitting waveform to underground by a transmitting device, propagating back to the ground through underground mediums, observing and collecting electromagnetic field response signals by a receiver; analyzing the correlation of electromagnetic field response signals observed by the receiver and the transmitting waveform, deconvolution identifying and extracting an earth impulse response signal stimulated by the pseudo random transmitting waveform, calculating an apparent resistivity and a polarizability phase; processing data and obtaining the polarizability phase with high resolution and electrical property fine structure which are reflecting deep resources. According to the method for detecting deep geology and sulfide ore resources disclosed in the invention, interference is deconvolution suppressed by using a pseudo random encoding current signal transmission of an electrical prospecting apparatus, observed electromagnetic field responses and emission current signals, the apparent resistivity and excitation polarization methodphase are calculated, investigation and detection of deep geology and sulfide ore resources are achieved, investigation accuracy of deep sulfide ore is greatly improved, and actual popularization andapplication are facilitated.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a detection method for deep geology and sulfide ore body resources. Background technique [0002] In the exploration and detection of geological mineral resources, the methods used usually include electromagnetic method and induced polarization method. Although the electromagnetic method can detect geology and ore bodies with an exploration depth greater than 1000m, it cannot detect the polarizability information related to sulfide ore bodies. Exploration and detection by chemical method. At present, the exploration depth of the existing polarizability detection equipment is shallow, less than 1000m, which cannot be used for deep geology and sulfide ore body resource exploration and detection, which greatly affects the exploration effect of deep sulfide ore bodies and limits practical applications. [0003] Therefore, those skilled in the art are devoting themselves to provid...

Claims

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Application Information

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IPC IPC(8): G01V3/38G01V3/08
CPCG01V3/08G01V3/38G01V3/081G01V3/087G01V3/088G06F17/10
Inventor 雷达底青云杨良勇王若付长民刘云祥
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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