Exploration method and system for pegmatite veins

Patent metadata

Field	Value
Publication number	US-11761944-B2
Application number	US-202217991056-A
Country	US
Kind code	B2
Filing date	Nov 21, 2022
Priority date	Dec 1, 2021
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

Disclosed is an exploration method and system for pegmatite veins. The exploration method includes: three grounding electrodes are arranged at each observation point in a target area where pegmatite veins are located, and collecting electric field differences between two groups of grounding electrodes; drawing a multi-channel map, based on positions of the grounding electrodes, according to the electric field differences; obtaining resistivity variation characteristics of pegmatite veins according to the transverse variation of multi-channel map, and determining locations and lithologic characteristics of pegmatite veins according to the resistivity variation characteristics. Through functional modules with different functions, an exploration system is formed to realize the exploration method mentioned in the application.

First claim

What is claimed is:

1. An exploration method for pegmatite veins, comprising:
setting three grounding electrodes at each observation point in a target area where pegmatite veins are located, and collecting electric field differences between two grounding electrodes;
drawing a multi-channel map, based on positions where the grounding electrodes are set, according to the electric field differences; and
obtaining resistivity variation characteristics of the pegmatite veins according to a transverse change of multi-channel map, and determining locations and lithologic characteristics of the pegmatite veins according to the resistivity variation characteristics;
in a process of collecting the electric field differences between two grounding electrodes, the three grounding electrodes include a first distance, a second distance and a third distance;
a sum of the first distance and the second distance is equal to the third distance;
a first electric field difference of the first distance and a second electric field difference of the second distance are collected, and the multi-channel map is drawn according to the third distance;
a sum of the first distance and the second distance is greater than the third distance;
in a process of drawing the multi-channel map, the first distance and the second distance include a first included angle;
an included angle range of the first included angle is 60°-160°;
a first electric field difference of the first distance and a second electric field difference of the second distance are collected, and the multi-channel map is drawn according to the first distance and the second distance;
in the process of drawing the multi-channel map, the first distance and the second distance include a second included angle;
the second included angle is greater than 0° and less than 60°;
a sum of projections of the first electric field difference and the second electric field difference on the third distance is obtained based on the second included angle, and the multi-channel map is drawn according to the first distance and the second distance;
in the process of drawing the multi-channel map, the first distance and the second distance include a third included angle;
the third included angle is greater than 160° and less than 180°; and
the multi-channel map is drawn according to the third distance and a sum of the first electric field difference and the second electric field difference.

Assignees

• Inst Geology & Geophysics Cas

Inventors

• Zhou Nannan
• Xue Guoqiang
• Zhang Shun
• Wei Xinhao

Classifications

• G01N33/24 Primary

  Earth materials (G01N33/42 takes precedence) · CPC title

• G01V3/088

  operating with electric fields (G01V3/082 takes precedence) · CPC title

• G01V3/38

  Processing data, e.g. for analysis, for interpretation, for correction · CPC title

• G01N27/04

  by investigating resistance · CPC title

• G01V3/06

  using AC · CPC title