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Method for extracting ostracod microfossils from black shale

A black shale and fossil technology, applied in the field of extracting ostracod microfossils, can solve the problems of late start, failure to propose ostracod fossil methods, and slow progress, and achieve low shell breaking rate, easy implementation, and method The effect of simple process

Inactive Publication Date: 2019-02-26
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the predecessors have made some explorations in this area, they were trapped by their understanding, started late, and made slow progress. So far, they have not been able to propose a set of feasible methods for extracting ostracod fossils from black shale.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. The method for extracting ostracod microfossils from black shale, including sampling, pretreatment, wet sieving, drying, dry sieving, sampling, identification and statistics, and its specific operation steps are as follows:

[0018] A. Sampling, crush the black shale into particles, the particle volume is 0.2 cm 3 .

[0019] B. Pretreatment, put black shale particles in a container, add 8% hydrogen peroxide solution, the volume ratio of black shale particles to hydrogen peroxide is 1:10, and the black shale particles are 50 cm 3 , in order not to destroy the fossils, 0.05mol / L sodium carbonate solution must be added as a buffer solution, so that the pH of the soaking solution is maintained at 8, the solution temperature is maintained at 30°C, and the reaction time is 48 hours. The organic matter is removed, and the black shale particles are initially dispersed. and then filtered to obtain pretreated black shale samples.

[0020] C. Wet sieving, put the p...

Embodiment 2

[0025] Embodiment 2. The method for extracting ostracod microfossils from black shale, including sampling, pretreatment, wet sieving, drying, dry sieving, sampling and identification and statistics, and its specific operation steps are as follows:

[0026] A. Sampling, crush the black shale into particles, the particle volume is 0.35 cm 3 .

[0027] B. Pretreatment, put black shale particles in a container, add 9% hydrogen peroxide solution, the volume ratio of black shale particles to hydrogen peroxide is 1:18, and the black shale particles are 100 cm 3 , in order not to destroy the fossils, 0.08 mol / L sodium carbonate solution must be added as a buffer solution, so that the pH of the soaking solution is maintained at 8.5, the solution temperature is maintained at 35°C, and the reaction time is 36 hours. The organic matter is removed and the black shale particles are initially dispersed. and then filtered to obtain pretreated black shale samples.

[0028] C. Wet sieving, pu...

Embodiment 3

[0033] Embodiment 3. The method for extracting ostracod microfossils from black shale, including sampling, pretreatment, wet sieving, drying, dry sieving, sampling, identification and statistics, and its specific operation steps are as follows:

[0034] A. Sampling, crush the black shale into particles, the particle volume is 0.5 cm 3 .

[0035] B. Pretreatment, put black shale particles in a container, add 10% hydrogen peroxide solution, the volume ratio of black shale particles to hydrogen peroxide is 1: 25, and the black shale particles are 150 cm 3 , in order not to destroy the fossils, 0.1 mol / L sodium carbonate solution must be added as a buffer solution to keep the pH of the soaking solution at 9, the temperature of the solution at 40°C, and the reaction time of 24 hours to remove organic matter and make the black shale particles preliminarily disperse and then filtered to obtain pretreated black shale samples.

[0036] C. Wet sieving, put the pretreated black shale s...

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Abstract

A method for extracting ostracod microfossils from black shale specifically comprises the steps of smashing black shale into particles the volume of which is 0.2-0.5 cm<3>, placing the black shale particles into a container, conducting pretreatment with a hydrogen peroxide and sodium carbonate mixing solution, conducting filtration, adding water, conducting heating, conducting screening with a screen cloth after sediments are dispersed, repeatedly washing the sediments in a screen with tap water, conducting drying, dry screening and sample selection on a sediment sample subjected to wet screening, and finally conducting authentication and statistics. Statistics is conducted based on volumic number, in other words, one volume corresponds to ten individuals, the whole sample has four volumes, and abundance is 40 pieces per sample; if 1 / 16 volume contains ten individuals, the abundance of the whole sample is 160 pieces per sample, and the total abundance of the sediment sample is equal to the sum of the abundance of the fine-grained sediment sample and the abundance of the coarse-grained sediment sample.

Description

technical field [0001] The invention relates to a method for extracting ostracod microfossils, in particular to a method for extracting ostracod microfossils from black shale. Background technique [0002] Black shale is a kind of sedimentary rock rich in organic matter and widely distributed. It is a good material for reconstructing paleoclimate and paleoenvironment. This type of rock is generally formed in an anoxic sedimentary environment, so most scholars believe that it rarely contains animal fossils. At present, more and more researchers have found that there are also many layers rich in animal fossils in black shale, such as micro-animal fossils-ostracods and so on. Ostracod fossils are good indicators for reconstructing paleoclimate and paleoenvironment, so it is very important to scientifically and effectively extract such fossils from black shale. Although the predecessors have made some explorations in this area, they started late and progressed slowly due to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 陈亮唐振平刘江谢焱石王正庆刘珊黄伟胡杨冯志刚
Owner NANHUA UNIV
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