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Device and method for quantifying 4He in mineral particles, and uranium-thorium/helium dating method

A technology of mineral particles and quantitative device, which is applied in the field of petroleum exploration, can solve the problems of inability to provide historical information of low-temperature thermal evolution and low dating accuracy.

Pending Publication Date: 2020-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the given uranium-lead age is the crystallization age, which can only provide thermochronological information of geological bodies under high-temperature conditions, and cannot provide historical information of low-temperature thermal evolution
The disadvantage of this method is that the fission track dating is obtained by the length and density of particle tracks produced in the process of nuclear decay of apatite and zircon, and the dating accuracy is relatively low

Method used

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  • Device and method for quantifying 4He in mineral particles, and uranium-thorium/helium dating method
  • Device and method for quantifying 4He in mineral particles, and uranium-thorium/helium dating method

Examples

Experimental program
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Effect test

Embodiment 1

[0074] Embodiment 1 provides a kind of mineral particle 4 He quantitative device. like figure 1 As shown, the quantitative device includes: laser heating system 10, purification and enrichment system 20, standard sample mixing system 30, detection and analysis system 40, and vacuum processing system 60; laser heating system 10, purification and enrichment system 20, and detection and analysis The system 40 is sequentially connected in series; the laser heating system 10 is used to heat the mineral particles, so that the mineral particles release gas, and extract the gas, the gas contains 4 He; Purification and enrichment system 20 is used to purify He in the enriched gas 4 He; standard sample mixing system 30 includes 4 He standard quantitative tube 302, and 4 He standard quantitative tube 302 connected 4 He standard tank 301, 3 He dilution quantitative tube 304, and 3 He dilution quantitative tube 304 communicated 3 He dilution tank 303, 4 He calibration quantitative...

Embodiment 2

[0076] Embodiment 2 provides a kind of mineral particle 4 He quantitative device. like figure 2 As shown, the quantitative device includes: laser heating system 10, purification and enrichment system 20, standard sample mixing system 30, detection and analysis system 40, and vacuum processing system 60; laser heating system 10, purification and enrichment system 20, and detection and analysis The system 40 is sequentially connected in series; the laser heating system 10 is used to heat the mineral particles, so that the mineral particles release gas, and extract the gas, the gas contains 4 He; Purification and enrichment system 20 is used to purify He in the enriched gas 4 He; the automatic control and data processing system 50 is used to control the laser heating system 10, the purification and enrichment system 20, the standard sample mixing system 30, the detection and analysis system 40, and the vacuum processing system 60, and calculate the mineral particles 4 The con...

Embodiment 3

[0090] Embodiment 3 provides a kind of mineral particle 4 He Quantitative Methods. This quantitative method is carried out in above-mentioned quantitative device, and quantitative method comprises the following steps:

[0091] S1. Selection and measurement of mineral particles.

[0092] S2. Vacuumize the dosing device through the vacuum processing system 60 .

[0093] S3. The laser heating system 10 heats the mineral particles, so that the mineral particles release gas.

[0094] S4. The purification and enrichment system 20 purifies and enriches the gas 4 He; 3 He dilution tank 303 direction 3 He dilution loop 304 release 3 He, until 3 The pressure of the He dilution metering tube 304 is the first preset pressure; 4 He standard tank 301 direction 4 He standard quantitative tube 302 release 4 He, until 4 The pressure of He standard quantitative tube 302 is the second preset pressure; 3 In the He dilution quantitative tube 304 3 He, from 4 He standard quantitative ...

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Abstract

The invention belongs to the technical field of oil exploration, and relates to a device for quantifying 4He in mineral particles. The quantifying device comprises a laser heating system, a purification and enrichment system, a standard sample mixing system, a detection and analysis system, an automatic control and data processing system and a vacuum processing system, and the laser heating system, the purification and enrichment system and the detection and analysis system sequentially communicate in series; the laser heating system is used for heating the mineral particles, so that the mineral particles release gas, and the gas is extracted and contains 4He; the purification and enrichment system is used for purifying and enriching 4He in the gas; the standard sample mixing system comprises a 4He standard quantitative tube, a 4He standard tank communicating with the 4He standard quantitative tube, a 3He dilution quantitative tube and a 3He dilution tank communicating with the 3He dilution quantitative tube; the 4He standard quantitative tube and the 4He standard tank are connected with the 3He dilution quantitative tube and the 3He dilution tank in parallel; and the detection andanalysis system is used for detecting the content of 4He and 3He. The content of 4He in the mineral particles can be accurately detected through one-time sample injection by utilizing an isotope dilution method.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration, more specifically, relates to a kind of 4 He quantification apparatus and method and uranium-thorium / helium dating method. Background technique [0002] (U-Th) / He dating is based on the disintegration of U and Th radioactive elements in mineral particles such as apatite and zircon 4 He and mineral particles enter the He closed system due to a certain geological event at a certain temperature point to start the geological clock for dating. It is a new technology for low-temperature thermochronology research that has developed rapidly in recent years. The / He age refers to the time from the cooling of the rock to the closure of the corresponding minerals from the (U-Th) / He system to the present. It records the structural evolution history of minerals after they have experienced closure temperature. Geomorphic evolution and sediment source analysis have been widely used, especially i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/28G01N1/44G01N1/38G01N1/34
CPCG01N27/62G01N1/28G01N1/44G01N1/38G01N1/34Y02E30/30
Inventor 王杰王强王萍马亮帮陈强路陶成杨华敏
Owner CHINA PETROLEUM & CHEM CORP
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