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Method based on cathode luminescence feature of scheelite in skarn deposit and used for distinguishing redox properties of ore-forming fluid

A cathodoluminescence feature, skarn-type technology, applied in measuring devices, instruments, material analysis by electromagnetic means, etc., can solve problems such as scheelite research, and achieve the effect of strong intuition and strong practical guiding significance

Inactive Publication Date: 2018-02-02
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

Although at the end of the 20th century, people have discovered that scheelite is also a mineral with cathodoluminescence, but no one has carried out related research on scheelite in skarn deposits.

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  • Method based on cathode luminescence feature of scheelite in skarn deposit and used for distinguishing redox properties of ore-forming fluid
  • Method based on cathode luminescence feature of scheelite in skarn deposit and used for distinguishing redox properties of ore-forming fluid
  • Method based on cathode luminescence feature of scheelite in skarn deposit and used for distinguishing redox properties of ore-forming fluid

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Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] Please refer to figure 1 , the embodiment of the present invention provides a method for discriminating the oxidation-reduction properties of ore-forming fluids based on the cathodoluminescence characteristics of scheelite in skarn-type deposits, comprising the following steps:

[0023] Step S101, sampling the skarn-type deposits according to the geological characteristics of the field deposits, and selecting WO in the skarn-type deposits 3 Several scheelite samples with a content of not less than 0.06%.

[0024] Step S102, making an electronic probe sheet, repeatedly irradiating the scheelite sample with a fluorescent lamp to determine the output position of the scheelite particles, and then determining the grinding position of the electronic pr...

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Abstract

The invention provides a method based on the cathode luminescence feature of scheelite in a skarn deposit and used for distinguishing the redox properties of an ore-forming fluid. The method includes:acquiring a plurality of scheelite samples; selecting scheelite particles on the basis of the mineralogy, morphology and production features of the scheelite particles in the scheelite samples to obtain high-quality scheelite particles; acquiring the scanning electron microscope-cathode luminescence image and back scattering image of the high-quality scheelite particles; based on the scanning electron microscope-cathode luminescence image and the back scattering image, dividing the high-quality scheelite particles according to the morphology and internal structural features of the scheelite particles to obtain a plurality types of high-quality scheelite particles; performing in-situ analysis on rare-earth elements in the plurality types of high-quality scheelite particles to obtain europium content and molybdenum content data; calculating europium anomaly according to the europium content data, and building an element distribution diagram according to the europium anomaly and the molybdenum content data, wherein the element distribution diagram is used for indicating the redox properties of the ore-forming fluid of the scheelite.

Description

technical field [0001] The invention relates to the field of research on characteristics of scheelite ore-forming fluids in skarn-type deposits, in particular to a method for distinguishing redox properties of ore-forming fluids based on cathodoluminescence characteristics of scheelite in skarn-type deposits. Background technique [0002] China is one of the countries with the widest distribution of skarn-type deposits and the longest history of mining and smelting in the world. Skarn-type deposits are the main source of tungsten resources in the world. Skarn-type tungsten deposits are mainly produced in granite and carbonate Between the rock-like contact zone and the calcareous rock layer and sandstone layer near the granite, the ore body is often layered and lentil-shaped. Skarn-type deposits are the result of magmatic gas-water-hydrothermal alternating surrounding rocks, so the composition, formation depth, shape, and scale of magmatic rocks have a decisive impact on the ...

Claims

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Application Information

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IPC IPC(8): G01N23/2206G01N27/62
CPCG01N23/2202G01N23/2206G01N27/628G01N2223/071
Inventor 王敏芳刘坤张旭波王有江
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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