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Method for making material source analysis by using zircon uranium lead and fission track double dating

A technology of fission track and zircon uranium, which is applied in the field of provenance analysis and can solve problems such as inability to objectively identify provenances

Inactive Publication Date: 2020-03-24
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for provenance analysis using zircon uranium-lead and fission track bi-dating, which solves the problem that traditional methods cannot objectively identify provenance, and can distinguish the zircons, and can distinguish zircons of different provenances and uplifted ages, making provenance analysis more accurate and credible

Method used

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Embodiment 1

[0026] A method for provenance analysis using double dating of zircon, uranium, lead and fission track, the method includes:

[0027] (1) Use a high-pressure device to crush the sandstone into fragments less than or equal to 1mm, and use a screen to separate the sandstone fragments with a diameter of 63-400μm;

[0028] (2) Because zircon is a non-magnetic heavy mineral (> 3.4g / cm 3 ), using Franz magnetic separator to separate magnetic minerals from non-magnetic minerals at low current (0.6A);

[0029] (3) Separate zircon from non-magnetic mineral components by heavy liquid separation technology: iodomethane (d = 3.32g / cm 3 ) Fill 2 / 3 of the conical funnel, pour non-magnetic minerals into the funnel, fully stir and leave for a few minutes, then remove the heavy mineral components at the bottom from the funnel, rinse and air dry, and select zircon under the microscope;

[0030] (4) The zircon particles are selected and fixed to the Teflon pad, and the inner surface is exposed by polishi...

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Abstract

The invention discloses a method for making material source analysis by using zircon uranium lead and fission track double dating, which comprises the following steps: (1) carrying out magnetic separation on sandstone debris to obtain non-magnetic minerals; (2) separating zircon d from components in the non-magnetic minerals through a heavy liquid separation technology, and carrying out surface polishing; (3) observing growth girdle characteristics of zircon particles so as to check uniform components and magma growth modes thereof; (6) etching the zircon particle sample by adopting multiple etching technology; (7) taking mica as an external detector to be attached to the etched zircon particle sample, irradiating, and inducing fission tracks; (8) under a high-magnification microscope, analyzing the number of fission tracks of zircon particles and standard sample particles, and decomposing track age distribution into main age peaks; and (9) zircon U-Pb age determination. The method provided by the invention can distinguish zircon formed by different material sources in different times and zircon raised by different material sources in different times, and is more accurate and credible.

Description

Technical field [0001] The invention relates to a method for material source analysis, in particular to a method for material source analysis using double dating of zircon, uranium, lead and fission tracks. Background technique [0002] Traditional sedimentary rock provenance analysis methods mainly include: clastic rock cuttings composition identification method, heavy mineral method and element composition discrimination. Among them, the method for identifying the composition of the cuttings is to systematically collect the clastic sediments of the research layer to make rock thin slices, and observe the composition of the cuttings that make up the clastic rock under a microscope, so that the rock composition of the rock in the source area can be roughly inferred. Sex. For rocks of the same lithology formed in different ages, this method cannot distinguish the rocks of which age the sediments came from. The heavy mineral method is to systematically collect heavy minerals from...

Claims

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Application Information

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IPC IPC(8): G01N23/04G01N23/20G01N21/84G01N27/62G01N1/28G01N1/32G01N1/34
CPCG01N23/04G01N23/20G01N21/84G01N27/62G01N1/28G01N1/32G01N1/34
Inventor 芦刚邓虎成伏美燕
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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