Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments

Authigenic carbonates are widely distributed in marine sediments, microbes, and anaerobic oxidation of methane (AOM) play a key role in their formation. The authigenic carbonates in marine sediments have been affected by weathering and diagenesis for a long time, it is difficult to understand their...

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Main Authors: Zilin Wei, Tianfu Xu, Songhua Shang, Hailong Tian, Yuqing Cao, Jiamei Wang, Zhenya Shi, Xiao Liu
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Journal of Marine Science and Engineering
Subjects:
Online Access:https://www.mdpi.com/2077-1312/9/5/479
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spelling doaj-237176c8b0fb4a1886d34336bd089eee2021-04-29T23:04:51ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-04-01947947910.3390/jmse9050479Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine SedimentsZilin Wei0Tianfu Xu1Songhua Shang2Hailong Tian3Yuqing Cao4Jiamei Wang5Zhenya Shi6Xiao Liu7Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, ChinaCollege of Construction Engineering, Jilin University, Changchun 130012, ChinaZhongji Yulong Construction Co., Ltd., Nanyang 473000, ChinaThe Second Geological Brigade of Shandong Geological Exploration Bureau, Shandong Provincial Lunan Geo-Engineering Exploration Instituts, Yanzhou 272100, ChinaAuthigenic carbonates are widely distributed in marine sediments, microbes, and anaerobic oxidation of methane (AOM) play a key role in their formation. The authigenic carbonates in marine sediments have been affected by weathering and diagenesis for a long time, it is difficult to understand their formation process by analyzing the samples collected in situ. A pore water environment with 10 °C, 6 MPa in the marine sediments was built in a bioreactor to study the stages and characteristics of authigenic carbonates formation induced by microbes. In experiments, FeCO<sub>3</sub> is formed preferentially, and then FeCO<sub>3</sub>-MgCO<sub>3</sub> complete isomorphous series and a small part of CaCO<sub>3</sub> isomorphous mixture are formed. According to this, it is proposed that the formation of authigenic carbonates performed by AOM and related microbes needs to undergo three stages: the rise of alkalinity, the preferential formation of a carbonate mineral, and the formation of carbonate isomorphous series. This work provides experimental experience and reference basis for further understanding the formation mechanism of authigenic carbonates in marine sediments.https://www.mdpi.com/2077-1312/9/5/479anaerobic oxidation of methaneauthigenic carbonatesbioreactor experiment
collection DOAJ
language English
format Article
sources DOAJ
author Zilin Wei
Tianfu Xu
Songhua Shang
Hailong Tian
Yuqing Cao
Jiamei Wang
Zhenya Shi
Xiao Liu
spellingShingle Zilin Wei
Tianfu Xu
Songhua Shang
Hailong Tian
Yuqing Cao
Jiamei Wang
Zhenya Shi
Xiao Liu
Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
Journal of Marine Science and Engineering
anaerobic oxidation of methane
authigenic carbonates
bioreactor experiment
author_facet Zilin Wei
Tianfu Xu
Songhua Shang
Hailong Tian
Yuqing Cao
Jiamei Wang
Zhenya Shi
Xiao Liu
author_sort Zilin Wei
title Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
title_short Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
title_full Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
title_fullStr Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
title_full_unstemmed Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
title_sort laboratory experimental study on the formation of authigenic carbonates induced by microbes in marine sediments
publisher MDPI AG
series Journal of Marine Science and Engineering
issn 2077-1312
publishDate 2021-04-01
description Authigenic carbonates are widely distributed in marine sediments, microbes, and anaerobic oxidation of methane (AOM) play a key role in their formation. The authigenic carbonates in marine sediments have been affected by weathering and diagenesis for a long time, it is difficult to understand their formation process by analyzing the samples collected in situ. A pore water environment with 10 °C, 6 MPa in the marine sediments was built in a bioreactor to study the stages and characteristics of authigenic carbonates formation induced by microbes. In experiments, FeCO<sub>3</sub> is formed preferentially, and then FeCO<sub>3</sub>-MgCO<sub>3</sub> complete isomorphous series and a small part of CaCO<sub>3</sub> isomorphous mixture are formed. According to this, it is proposed that the formation of authigenic carbonates performed by AOM and related microbes needs to undergo three stages: the rise of alkalinity, the preferential formation of a carbonate mineral, and the formation of carbonate isomorphous series. This work provides experimental experience and reference basis for further understanding the formation mechanism of authigenic carbonates in marine sediments.
topic anaerobic oxidation of methane
authigenic carbonates
bioreactor experiment
url https://www.mdpi.com/2077-1312/9/5/479
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