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A Nondestructive Separation Method for Microfossils

A separation method and technology for fossils, applied in the field of analysis of microscopic paleontological fossils, can solve the problems of poor harvest rate and integrity of microfossils, serious acid corrosion of microfossils, etc., and achieve low cost of test equipment and materials, and operation procedures. simple effect

Active Publication Date: 2020-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a non-destructive separation method for microfossils, so as to solve the problems of severe acid erosion of microfossils in existing separation methods and poor harvest rate and integrity of microfossils obtained

Method used

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  • A Nondestructive Separation Method for Microfossils
  • A Nondestructive Separation Method for Microfossils
  • A Nondestructive Separation Method for Microfossils

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Embodiment

[0027] The non-destructive separation method of microfossils in this embodiment, the flow chart is as follows figure 1 As shown, the following steps are taken:

[0028] 1) Use a crushing machine or hand hammer to crush the rock sample into 3cm 3 The small pieces are uniformly numbered and placed in the sample cylinder;

[0029] 2) At room temperature, add glacial acetic acid solution with a mass concentration of 15% to the sample tank, the glacial acetic acid solution completely covers the sample, and the sample is completely loose after soaking for 24 hours;

[0030] 3) The soaked sample is washed with a set of sieves consisting of an upper sieve and a lower sieve (while rinsing and sieving). Dry the samples to obtain the upper sieve sample block and the lower sieve sample respectively;

[0031] 4) The upper sieve sample block is crushed with a rock crusher or hand hammer until the particle size is not greater than 2mm, and then the upper sieve sample is obtained through s...

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Abstract

The invention relates to a microfossil nondestructive separation method. The method comprises the following steps: a fragmented rock sample is placed in a dilute acid solution with solute mass concentration being 5-15% for being immersed until the rock is loosen, the immersed sample uses a sieve set composed of an upper sieve and a lower sieve for sample washing, the sample on the upper sieve andthe sample on the lower sieve are dried after sample washing, and an upper sieve block and a lower sieve sample are respectively obtained; the upper sieve block is broken, and then is subjected to sample washing and sample drying to obtain an upper sieve sample; and sample selection is carried out on a lower sieve sample and the upper sieve sample. During processes of a traditional acidolysis method, the rock sample is immersed in the acid solution during a whole process with long time, and acid etching on the microfossil is severe so that yield and completeness are influenced. According to the provided microfossil nondestructive separation method, the dilute acid solution is used for immersion for loosening the surrounding rocks, acid etching of fossil in the surrounding rocks can be avoided, and sample fragmenting and sample washing are easily carried out after the surrounding rocks are loosen, so that the sample which accords with requirement can be conveniently obtained.

Description

technical field [0001] The invention belongs to the analysis field of micro-fossils, and in particular relates to a method for non-destructive separation of micro-fossils. Background technique [0002] Microfossils are small individual fossils and small fragments of some groups, or tiny parts of some larger fossils, that are studied with the aid of a microscope. At present, microfossils often come into contact with ostracods, foraminifers, charophytes, radiolarians, conodonts, bryozoans, sea urchin spines, sponge spicules, and small gastropods, brachiopods, and flapbranchs. And early Paleozoic veneer small individual animal and plant fossils. The genera, species and individuals of microfossils are extremely rich, often enriched in layers. They are widely distributed in strata and have a long geological history. [0003] The study of microfossils can provide a geological time scale for the research of various geology disciplines. The separation and identification of micro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 涂黎曾光艳严永新翁霞林社卿朱红卫崔炜霞南科为周建文张帆
Owner CHINA PETROLEUM & CHEM CORP
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