Method for simulating early degradation of organic matter in microbialite

Abstract

The embodiment of the invention relates to a method for simulating early degradation of organic matter in microbialite. According to the invention, blue-green algae in microbialite is cultured in thelaboratory as organic matter in the experiment, bacteria involved in various stages of organic matter degradation in the microbial mat are cultured, and the bacteria are added into an interlayered device of blue-green algae and carbonate minerals under aerobic and anaerobic conditions respectively for a reaction, so as to realize the simulation of the early degradation process of organic matter. The degradation products can be well stored in a reaction device, and after the degradation is completed, samples are taken from a sampling port for liquid chromatography and infrared spectrum analysis, thus completing the accurate detection of the products in each stage of organic matter degradation.

Description

technical field [0001] The invention relates to the technical field of organic matter analysis in microbial rocks, in particular to a method for simulating the early degradation of organic matter in microbial rocks, which is used to qualitatively and quantitatively monitor the product characteristics of different organic matter degradation processes. Background technique [0002] Through a large number of studies on the early degradation of organic matter in microbial rocks, it can be known that the degradation of organic matter experienced in the diagenesis process is actually a complex biochemical process. As the burial depth of microbial sediments increases, organic matter will undergo aerobic respiration, nitrate reduction, iron-manganese oxide reduction, sulfate reduction, and fermentation in sequence. So far, many scholars have carried out a lot of work on the diagenetic process of modern microbial rocks, and realized that each stage will lead to the dissolution or for...

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Problems solved by technology

So far, many scholars have carried out a lot of work on the diagenetic process of modern microbial rocks, and realized that each stage will lead to the dissolution or formation of carbonate minerals in microbial rocks, which may be caused by the degradation of organic matter to produce organic acids or the formation of alkaline substances, but Microbial rocks are formed in the tidal flat environment, where the water exchange is relatively smooth, and the degradation products quickly enter the external marine environment, which leads to the low feasibility of collecting samples from the field and analyzing the degradation products of organic matter indoors.

In addition, it is difficult to correspond to the depth of the sample recovered and the degradation stage of organic matter, so it is difficult to detect the types and concentrations of acid produced in each stage of microbial rock organic matter degradation under natural conditions

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