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A Seismic Detection Method for Deep Gold-bearing Structures

A detection method and seismic exploration technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of weak geochemical information of gold ore body, difficult to identify deep deposits, etc., to solve the problem of precise positioning, positioning high precision effect

Active Publication Date: 2020-07-28
山东省地质矿产勘查开发局第六地质大队 +5
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Problems solved by technology

However, as the burial depth of the gold ore body gradually increases, the shielding effect of the overlying geological body becomes stronger and stronger, and the geophysical and geochemical information of the gold ore body becomes weaker and weaker. Information to identify deep deposits

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  • A Seismic Detection Method for Deep Gold-bearing Structures
  • A Seismic Detection Method for Deep Gold-bearing Structures
  • A Seismic Detection Method for Deep Gold-bearing Structures

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Embodiment Construction

[0027] The scheme of the present invention will be described in detail below in conjunction with examples.

[0028] The main prospecting technical index of deep gold-bearing structure prospecting of the present invention is:

[0029] (1) The scale of gold-bearing fault structures in Sanshan Island and Jiaojia in the north of Jiaoxi is large, the composition of the fracture filling in the fault is complex, the sericite alteration is strong, and fault gouge with a thickness of 5-20 cm is developed, resulting in the fracture surface There is a certain difference in physical properties between it and its surrounding rocks. In addition, the gold-bearing fault structure is a shovel-type fault with a steep dip in the shallow part and a gentle dip in the deep part ( figure 1 ), the inclination angle of the deep fracture surface is generally not greater than 45°, mostly between 10° and 30°, forming energy-concentrated reflection information near the fracture surface. Through the fine ...

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Abstract

The invention discloses a seismic exploration method for a deep gold-bearing structure. The invention breaks through a traditional prospecting idea that targets the determination of induced polarization anomalies, and creates a new prospecting method for detecting the deep gold-bearing structure by a seismic method. The method comprises steps of selecting an ore-controlling fault structure tectonic belt having a known surface required to be subjected to deep prospecting and arranging seismic survey lines; carrying out seismic exploration by using a high-precision seismic exploration method, and achieving seismic reflection wave accurate imaging of a deep ore-forming structure by using seismic data precise processing technology for deep gold deposit exploration; then according to a seismicprofile reflection wave image feature, analyzing a gold-bearing fracture width and the change in degree of fracture and the thickness of an alteration zone in a depth range of 5000 m; and finally, determining a deep prospecting target area by means of the change of the dip angle of the fault structure deduced by inference. The method of the invention has the characteristics of high positioning precision, a large exploration depth and a good prospecting effect, and solves the precise positioning of the deep gold-bearing structure.

Description

technical field [0001] The invention relates to the technical field of deep ore prospecting in geological exploration, in particular to a method for detecting deep vein rock gold ore bodies controlled by fault structures. Background technique [0002] Gold is an important strategic resource. Gold production includes detection and discovery of gold deposits, development of infrastructure to mine gold ore from deposits, and refining and processing of gold ore into gold bars. The most critical is the detection of gold deposits. With the massive mining of shallow and surface gold resources, the exploration and mining of deep resources has become an inevitable choice at present and in the future. However, since the vein-shaped gold deposit is one of the most difficult ore types to find ore deposits, coupled with the large burial depth of deep ore deposits and the weak information displayed on the surface, it is very difficult to find ore deposits. It is urgent to develop effectiv...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/00G01V1/30G01V1/34
Inventor 宋明春李世勇宋英昕李杰宋国政陈宏杰王洪军
Owner 山东省地质矿产勘查开发局第六地质大队
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