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Method for testing stone forest forming age and inverting river forming time

A technology of time and rivers, applied in the direction of measuring devices, instruments, and analysis materials, etc., can solve the problems of large measurement errors and inaccurate measurement of river formation time, and achieve the effects of not being easily weathered and water-eroded, easy to measure, and large measurement errors

Active Publication Date: 2016-11-23
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for measuring the formation age of stone forests and reversing the formation time of rivers, so as to solve the technical problems such as large error and inaccurate measurement of the formation time of rivers in the prior art

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  • Method for testing stone forest forming age and inverting river forming time

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Embodiment Construction

[0025] A method for determining the formation age of stone forests and inverting the formation time of rivers, comprising:

[0026] Step 1. Select the river section A and the stone pillar B to be tested;

[0027] Step 2. Determine the sampling point on the stone pillar B; sample at different elevations at equal distances, start from the bottom of the stone pillar every 10cm as a sampling point, and reach the top of the stone pillar at the last section △h x When x >=3cm, sampling points need to be set up; the sampling point is h 0 、h 1 、h 2 、h 3 ... h x ;△h x <3cm, no sampling point is set.

[0028] Step 3, collecting samples at each sampling point;

[0029] When collecting samples at each sampling point described in step 3, it is necessary to drill the surface stone pillar 1 cm before sampling. The purpose is to collect samples that accurately reflect the age of the stone forest and avoid interference from external factors

[0030] Step 4, the determination of the age...

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Abstract

The invention discloses a method for testing stone forest forming age and inverting river forming time. The method includes: step 1, selecting a river reach A and a stone column B to be tested; step 2, determining sampling points on the stone column B, equidistantly sampling at different elevations, and determining a sampling point every other 10cm starting from the bottom of the stone column, wherein when the last section at the uppermost end of the stone column delta hx is less than 10cm, if delta hx is more than 3cm, a sampling point needs to be set up, and the sampling points are h0, h1, h2, h3...hx; step 3, collecting samples at the sampling points; step 4, testing age of the samples at the sampling points; step 5, acquiring stone column forming time and time of a river from developing to forming according to the age of each sampling point. By the method, the technical problem that the prior art is large in error of testing river forming time and inaccurate in testing.

Description

Technical field: [0001] The invention belongs to the formation age of stone forests and inversion of river formation time measurement technology, in particular to a method for determining the formation age of stone forests and inversion of river formation time. Background technique: [0002] In the current research, the river terrace formed by the downcut of the river is used to measure the formation time of the river, and the cosmic ray causes 10 Be, 26 The dating techniques of Al, luminescence, and paleomagnetism can obtain the time period of the formation and evolution of river terraces, but the cut out river terraces are disturbed by the balanced river system water volume, transported materials, and river longitudinal profile gradients, and the river terraces are 80% % are those terrace layers that are not hard in texture, easy to be weathered, easy to be eroded by water, and known as biological loosening. The sediments of each layer are easy to lose with water or enter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N27/04G01N23/223G01N23/00E02B1/00
CPCE02B1/00G01N23/00G01N23/223G01N27/04G01N27/041G01N27/62
Inventor 白晓永田义超马凤杰许燕吴路华
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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