Method for detecting metal distribution rate in rock

A technology of metal distribution and rock, which is applied in the field of detection of metal distribution rate in rocks, can solve problems such as the difficulty in the determination of low-content metal elements, and achieve the effects of short test process, simple sample preparation, and good repeatability

Active Publication Date: 2019-07-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the above-mentioned difficult problems in the determination of low-content metal elements in chemical phase analysis and mineral content research in petrology, the present invention provides a method that can quickly and accurately detect mineral content in rocks and the distribution of metal elements in rocks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The mensuration of rubidium metal distribution rate in a kind of granite in Xinjiang of embodiment 1

[0034] 1) Crush the granite to -1mm, mix it thoroughly, and then shrink out 10g to prepare a polished piece, and then coat it with carbon film;

[0035] 2) Using the mineralogy automatic animal measurement system, the magnification is 200 times, and the mineral content in the optical film is automatically detected;

[0036] 3) After the mineral content is measured, the surface of the sample is polished, and then the content of rubidium in the mineral is measured by a laser ablation inductively coupled plasma mass spectrometer. The ablation diameter is 50 microns, and the ablation time is 50 seconds. At the same time, the standard material is directly used as an external standard make corrections;

[0037]4) When the laser ablation inductively coupled plasma mass spectrometer measures the content of rubidium in minerals, each mineral measures 10 points, and then takes ...

Embodiment 2

[0043] Determination of rubidium metal distribution rate in a kind of granite pegmatite in Shaanxi in embodiment 2

[0044] 1) Slice the granite directly to make a polished piece with a side length of 25mm and a thickness of 8mm, and then coat it with carbon film;

[0045] 2) Using the mineralogy automatic animal measurement system, the magnification is 150 times, and the mineral content in the optical film is automatically detected;

[0046] 3) After the mineral content is measured, the surface of the sample is polished, and then the rubidium content in the mineral is measured by a laser ablation inductively coupled plasma mass spectrometer. The ablation diameter is 100 microns, and the ablation time is 20 seconds. At the same time, the standard material is directly used as an external standard make corrections;

[0047] 4) When the laser ablation inductively coupled plasma mass spectrometer measures the content of rubidium in minerals, each mineral measures 5 points, and th...

Embodiment 3

[0053] Embodiment 3 Determination of rubidium metal distribution rate in a kind of fine-grained granite in Gansu

[0054] 1) Break the granite to -1mm, mix it and shrink it to make a sanding sheet, and then coat it with carbon film;

[0055] 2) Use the mineralogy automatic animal measurement system, magnify 300 times, and automatically detect the mineral content in the optical film;

[0056] 3) After the mineral content is measured, the surface of the sample is polished, and then the rubidium content in the mineral is measured by laser ablation inductively coupled plasma mass spectrometer. The ablation diameter is 20 microns, and the ablation time is 100 seconds. At the same time, the standard material is directly used as the external standard make corrections;

[0057] 4) When the laser ablation inductively coupled plasma mass spectrometer measures the content of rubidium in minerals, each mineral measures 8 points, and then takes the average value as the mass content (ppm) ...

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Abstract

The invention provides a method for detecting a metal distribution rate in rock. The method includes the following steps that: a rock sample is made into a polished sheet, a thin sheet or a probe sheet, and the polished sheet, thin sheet or probe sheet is coated with a film; the mass percentage content of a mineral in the rock is measured with a mineralogical automatic analysis instrument; the mass content of a metal element M in the mineral is measured with a laser ablation inductively coupled plasma mass spectrometer, the unit of the mass content of the metal element M being ppm; the grade of the metal element M in the rock is calculated according to a formula 1 which is described in descriptions of the invention, i in the formula 1 represents the ith mineral substance in the rock, gammai in the formula 1 represents the mass percentage content of the ith mineral substance in the rock, and betai in the formula 1 represents the mass content (ppm) of the metal element M in the ith mineral; the metal distribution rate of the metal element M in the rock is calculated according to a formula 2 which is described in descriptions of the invention. With the method of the invention adopted,a novel method is provided for the geochemical, petrologic and mineralogical research of elements.

Description

technical field [0001] The invention belongs to the field of geochemistry, and in particular relates to a method for detecting the metal distribution rate in rocks. Background technique [0002] Rubidium (Rb) is an active alkali metal, which has important uses in high-tech and high-tech fields such as aerospace industry, atomic energy industry, bioengineering and energy industry. Therefore, the development and utilization of rubidium resources have attracted more and more attention. [0003] Due to the particularity of rubidium geochemistry, independent rubidium minerals have not been found yet, and there is no method to measure the distribution rate of rubidium metal in rocks. In the earth's crust, rubidium often coexists with cesium, lithium, potassium and other metals. The occurrence state of rubidium is extremely complicated, and it is difficult to develop, extract and utilize rubidium ore. In the process of geological exploration and comprehensive utilization of miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/28
CPCG01N1/28G01N27/628
Inventor 于宏东齐涛王丽娜曲景奎宋静
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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