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Method for discriminating zircon genetic type by using zircon structure

A technology of structure discrimination and zircon, which is applied in the direction of material analysis, measurement device, and instrument using wave/particle radiation, which can solve the problems that are not easy for junior researchers to grasp, occupy instruments and equipment, and consume researchers’ time and energy. The effect of good timeliness, strong applicability and high accuracy

Pending Publication Date: 2021-05-04
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

The above research methods of zircon morphology are inseparable from detailed observation under the microscope and a large number of statistics and analysis, which require a lot of time and energy for researchers, occupying instruments and equipment for a long time, and are not easy for junior researchers to master.

Method used

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  • Method for discriminating zircon genetic type by using zircon structure
  • Method for discriminating zircon genetic type by using zircon structure

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Embodiment Construction

[0027] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0028] Such as figure 1 as shown,

[0029] Step 1, collecting rock ore samples;

[0030] Through field geological surveys, determine and collect rock ore samples that require chronological research. Depending on the rock type, determine the number of samples. Usually, the content of zircon in granite is relatively high, so it is enough to collect about 1-5 kg ​​of samples, while the content of zircon in mafic rocks is low, and it is necessary to collect 15-50 kg of samples.

[0031] Step 2, sorting zircons and preparing analysis sample targets;

[0032] The rock ore sample collected in step 1 is mechanically crushed to 50-80 mesh, and the non-magnetic heavy mineral zircon is separated by gravity separation and magnetic separation technology. Zircon particles (greater than 30) are stuck on the double-sided tape, fixed with colorless and transparent...

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Abstract

The invention belongs to the technical field of zircon type identification, and particularly relates to a method for discriminating zircon genetic type by using a zircon structure. The method includes: collecting rock ore samples; selecting non-magnetic heavy mineral zircon, and preparing an analysis sample target; collecting a backscattered electron image and a cathode luminescence electron image of the zircon sample; and comparing the collected zircon backscattered electron image and the cathode luminescence electron image with typical zircon crystal morphology and internal structure characteristics so as to discriminate the zircon genetic type. The method is wide in coverage, good in timeliness, high in applicability and high in accuracy. Therefore, the method has very important significance on scientific and reasonable explanation of the obtained U-Pb age of the zircon, and is wide in popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of zircon type identification, and in particular relates to a method for discriminating the origin type of zircon by using the zircon structure. Background technique [0002] Due to the stable physical and chemical properties of zircon, low content of ordinary lead, rich in uranium and thorium, low ion diffusion rate, and high sealing temperature (>800°C), these characteristics make zircon the most ideal object for U-Pb dating . In addition, zircons are generally ubiquitous in various types of rocks, and zircon samples are easy to sort. Therefore, zircon has become a powerful tool in geological research, and the zircon U-Pb method has always been the most common method used by geologists to discuss the occurrence time of geological events. With the development of science and technology, researchers have found that different zircon grains in the same geological body and different regions of the same zirc...

Claims

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Application Information

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IPC IPC(8): G01N23/2206G01N23/2202
CPCG01N23/2206G01N23/2202
Inventor 王生云范洪海王凤岗陈金勇吴玉朱泉龙王伟宋振涛
Owner BEIJING RES INST OF URANIUM GEOLOGY
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