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A Mineral Exploration Method Using Zircons to Judge the Ore-Formation of Granite Body

A granite and zircon technology, applied in the preparation of test samples, material analysis using wave/particle radiation, sampling, etc. Considerable economic value, cost saving, and the effect of shortening the prospecting cycle

Active Publication Date: 2021-06-25
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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  • A Mineral Exploration Method Using Zircons to Judge the Ore-Formation of Granite Body
  • A Mineral Exploration Method Using Zircons to Judge the Ore-Formation of Granite Body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1 Analysis of different types of zircons in the granite of the tungsten-tin polymetallic deposit

[0074] Collect a variety of tungsten-tin metal deposits of granite, and make zircon markers, take CL images and BSE images of the markers obtained, compare and analyze the obtained images with the actual situation, and get the following figure 1 Typical CL images of different types of zircons shown and attached figure 2 Typical BSE images of different types of zircons shown. In the CL image, the left image is a typical magmatic zircon, which is white in color as a whole, and has obvious internal oscillation zones; the right image is a typical hydrothermal zircon, which is black in color and has no internal oscillation zones; The middle picture shows a sample containing both magmatic zircons and hydrothermal zircons. There are black and white parts at the same time, and there is an internal oscillation zone in the white part. In the BSE image, the left picture is...

Embodiment 2

[0075] Example 2 Using zircons to determine the mineralization of granite bodies in the Huangshaping tungsten-tin polymetallic deposit in Hunan

[0076] The inventor discovered granite bodies developed in multiple stages in the Huangshaping deposit where tungsten-tin deposits may exist, and selected three types of rock bodies that may be in contact with the ore bodies, namely quartz porphyry, porphyry and granite porphyry For analysis, the analysis process includes:

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

[0078] According to the obtained CL images, there are a large number of clear oscillation rings in the zircons that account for more than 50% of the quartz porphyry and porphyry, as shown in the attached image 3 As shown in a and b, the overall luminous intensity of zircons accounting for more than 50% in granite porphyry is weak and appears black in the CL image, as shown in the attac...

Embodiment 3

[0087] Example 3 Using zircons to determine the mineralization of granite bodies in the Xianghualing tin-polymetallic deposit in Hunan

[0088] The inventor found many types of developed granite in the Laiziling pluton in Xianghualing, where tin-polymetallic deposits may exist, and selected two types of rocks that may be in contact with the ore body, namely albite granite and greisenized granite, for analysis. The analysis process is:

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

[0090] CL images and BSE images were taken for the above markers. According to the CL image, as attached Figure 8 As shown, it can be clearly seen that a large number of hydrothermal zircons with weak luminous intensity (appearing black in CL) are developed in the zircons in these two types of rock mass. More than 50%.

[0091] According to the BSE image, as atta...

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Abstract

The invention discloses a mineral prospecting method for judging the ore-forming properties of granite bodies by using zircons, which comprises the steps of cathodoluminescence photography, backscattering photography, U-Pb dating and micro-area component analysis of zircons sorted from granite bodies and Lu-Hf isotope ratio analysis and other processes, the present invention can quickly and accurately determine the mineralization of granite bodies, saving more than 50% of the time compared with traditional exploration methods; it can effectively indicate the occurrence of ore bodies related to granite Mining means saving time by more than 40%.

Description

technical field [0001] The invention relates to the technical field of mineral prospecting methods. Background technique [0002] Mineral exploration refers to effectively identifying and evaluating the occurrence and reserves of ore bodies by studying the geological conditions of mineral formation and distribution, the occurrence rules 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 The protruding internal and external contact zones on the top of the large granite, if you find the ore-forming rock body, you will naturally find the related ore body. Granite bodies are closely related to t...

Claims

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Application Information

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