Alph recoil track dating method

A mica and sample technology, used in soil material testing, measuring devices, preparation of samples for testing, etc., can solve problems such as application limitations and far from being applicable.

Inactive Publication Date: 2007-01-03
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The better method currently available for dating younger samples is 14 C isotope method, but its application is greatly limited because the sample needs to contain organic carbon
Other methods, such as optical luminescence method, electron spin resonance method, etc., are far from being applicable if they are in the laboratory research stage

Method used

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  • Alph recoil track dating method
  • Alph recoil track dating method
  • Alph recoil track dating method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0058] figure 1 Observation of the α recoil track in biotite, 60, 105, 150, 195 minutes of etching (4% HF 25±0.5°C) on the α recoil track in biotite, and the same sample under a phase contrast microscope Observations at different positions show that the growth of α-recoil tracks increases in number and diameter with the prolongation of etching time.

[0059] figure 2 Observe the α recoil track in biotite with a scanning force microscope, the etching condition is 4% HF at 21°C for 10 minutes, and the image size is (3×3μm 2 ).

[0060] image 3 Be that the α recoil track of the present invention determines the age method step as follows:

[0061] ① Sample collection:

[0062] ②Observation sample preparation:

[0063] ③Etching observation samples:

[0064] ④ Observation sample equipment:

[0065] ⑤Statistics of the number of α recoil tracks:

[0066] ⑥Measure vertical etching speed:

[0067] ⑦Determination of α recoil track bulk density:

[0068] ⑧ Determination of ur...

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Abstract

The invention is concerned with chronology research determination technology field about the Quaternary epoch, geography, disaster, archeology, especially a alpha recoil track determining age method, including: a) sample collection; b) observation sample preparation; c) etch observation sample; d) observation sample equipment; e) statistic alpha recoil track value; f) measure vertical etching speed; g) determine alpha recoil track body density; h) determine the uranium thorium content of the mica sample; i) compute the alpha recoil track age of the mica.

Description

technical field [0001] The invention relates to the determination technical field of the chronological research of Quaternary geology, geography, disasters, archeology and the like, in particular to a method for determining the age of an α recoil track. Background technique [0002] The dating of young samples is directly related to the research of resources and environment related to human survival, but it is a scientific problem that is far from being solved at present, so it has become one of the hot spots that are paid more and more attention at home and abroad. The better method currently available for dating younger samples is 14 C isotope method, but its application is greatly limited because the sample needs to contain organic carbon. Other methods, such as optical luminescence method, electron spin resonance method, etc., are far from being applicable if they are in the stage of laboratory research. [0003] α recoil track (English: Alpha-recoil tracks, abbreviati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/10G01N23/22G01N1/28G01N33/24
Inventor 袁万明董金泉保增宽高绍凯王世成
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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