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Mineral exploration method for judging mineralization of granite body by using zircon

A granite and zircon technology, which is applied in the preparation of test samples, material analysis by wave/particle radiation, sampling, etc., can solve the problems of long period, low efficiency, and difficulty in finding ore in the deep edge of the deposit, and achieve The effect of shortening the prospecting cycle and saving costs

Active Publication Date: 2020-06-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a new mineral exploration method, which uses the accessory mineral zircon widely present in granite bodies as a sign to judge whether it is ore-forming or not, and improves the ore-seeking efficiency of hydrothermal deposits related to granite. Accuracy, and at the same time solve the problems of difficult, long cycle and low efficiency in prospecting in the deep edge of the deposit

Method used

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  • Mineral exploration method for judging mineralization of granite body by using zircon
  • Mineral exploration method for judging mineralization of granite body by using zircon
  • Mineral exploration method for judging mineralization of granite body by using zircon

Examples

Experimental program
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Effect test

Embodiment 1

[0073] Example 1 Analysis of different types of zircon in granite from tungsten-tin polymetallic deposits

[0074] The granites of various tungsten-tin metal deposits were collected, and zircon markers were obtained. CL images and BSE images were taken for the obtained markers, and the obtained images were compared and analyzed with the actual situation. figure 1 Typical CL images of different types of zircon shown and attached figure 2 Typical BSE images of different kinds of zircon shown. In the CL image, the left image is a typical magmatic zircon, which is white as a whole and has obvious internal oscillation rings; the right image is a typical hydrothermal zircon, which is black as a whole and has no internal oscillation rings; The middle picture shows a sample containing both magmatic zircon and hydrothermal zircon, which has both black and white parts, and an internal oscillation ring in the white part. In the BSE image, the left image is a typical magmatic zircon, a...

Embodiment 2

[0075] Example 2 Using zircon to judge the mineralization of the granite body of the Huangshaping tungsten-tin polymetallic deposit in Hunan

[0076] The inventors discovered multi-stage granite bodies in the Huangshaping deposit where tungsten-tin ore may exist, and selected three types of rock bodies that may be in contact with the ore bodies, namely quartz porphyry, flower porphyry and granite porphyry. The analysis process includes:

[0077] First, 100 zircon markers were randomly selected from each of these three types of granites for CL image and BSE image capture.

[0078] According to the obtained CL images, a large number of clear oscillating rings are developed in the zircon, which accounts for more than 50% of the quartz porphyry and piebaldite, as shown in the appendix. image 3 As shown in a and b, while the zircon in granite porphyry accounts for more than 50% of the total luminous intensity is weak and appears black in the CL image, as shown in the appendix. ...

Embodiment 3

[0087] Example 3 Using zircon to judge the mineralization of the granite body of the Xianghualing tin polymetallic deposit in Hunan

[0088] The inventor found multiple types of developed granites in the Leaziling pluton in Xianghualing, where there may be tin polymetallic deposits, and selected two types of rocks that may be in contact with the ore body, which are respectively albite granite and greisite granite for analysis. The analysis process is:

[0089] First, 100 zircons were randomly selected from each of three albite granite samples (XHL5-11, XHL6-2 and XHL7-3) and two grititized granites (XHL5-16-2 and XHL6-18) as Logo item.

[0090] CL images and BSE images were taken on the above-mentioned markers. According to the CL image, as attached Figure 8 It can be clearly seen that a large number of hydrothermal zircon with weak luminous intensity (black in CL) are developed in the zircon in these two types of rock bodies. Statistics show that the proportion of these z...

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Abstract

The invention discloses a mineral exploration method for judging mineralization of a granite body by using zircon. The method comprises the steps of carrying out cathodic luminescence photography, back scattering photography, U-Pb dating, micro-area component analysis, Lu-Hf isotope ratio analysis and the like on zircon obtained by sorting from granite bodies. The mineralization of the granite bodies can be rapidly and accurately judged, and the time is saved by 50% or above compared with that of a traditional exploration method; the occurrence part of the ore body related to the granite can be effectively indicated, and the time is saved by more than 40% compared with that of the traditional prospecting means.

Description

technical field [0001] The present invention relates to the technical field of mineral exploration methods. Background technique [0002] Mineral exploration refers to the effective identification and evaluation of the occurrence and reserves of ore bodies by studying the geological conditions of the formation and distribution of minerals, the occurrence laws of ore deposits and the characteristics of ore body changes, so as to conduct geological, technical and economic evaluations. For magmatic hydrothermal deposits related to granite, it is particularly important to judge the correlation between various rock masses and mineralization in the area, which directly affects the direction of mineral exploration, because hydrothermal deposits related to granite are usually produced in relatively In the protruding inner and outer contact zone on the top of the large granite, if the ore-forming rock body is found, the related ore body will naturally be found. Granite bodies are cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2254G01N23/203G01N23/20008G01N23/2202G01N27/62G01N1/28G01N1/34G01N27/626
CPCG01N23/2254G01N23/203G01N23/2005G01N23/2202G01N27/62G01N1/286G01N1/34G01N33/24
Inventor 李欢
Owner CENT SOUTH UNIV
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