Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
Laboratory Experimental Study on the Formation of Authigenic Carbonates Induced by Microbes in Marine Sediments
复制标题
海洋沉积物中微生物诱导自生碳酸盐形成的室内实验研究
DOI：
10.3390/jmse9050479
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发表时间：
2021-04
影响因子：
2.9
通讯作者：
Liu Xiao
中科院分区：
文献类型：
--
作者：
Wei Zilin;Xu Tianfu;Shang Songhua;Tian Hailong;Cao Yuqing;Wang Jiamei;Shi Zhenya;Liu Xiao
自生碳酸盐广泛分布于海洋沉积物中，微生物和甲烷厌氧氧化（AOM）在其形成过程中起着关键作用。海洋沉积物中的自生碳酸盐长期受到风化和成岩作用的影响，通过现场采集的样品分析很难了解其形成过程。在生物反应器中建立了10 °C、6 MPa的海洋沉积物孔隙水环境，研究了微生物诱导自生碳酸盐形成的阶段和特征。实验中先生成FeCO_3，然后生成FeCO_3-MgCO_3全同晶系列和少量CaCO_3同晶混合物。据此提出AOM及其相关微生物作用下自生碳酸盐的形成需要经历碱度上升、碳酸盐矿物优先形成和碳酸盐类质同象系列形成3个阶段。该工作为进一步认识海洋沉积物中自生碳酸盐的形成机制提供了实验经验和参考依据。
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, FeCO3 is formed preferentially, and then FeCO3-MgCO3 complete isomorphous series and a small part of CaCO3 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.
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DOI：
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发表时间：
1991
期刊：
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影响因子：
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作者：
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通讯作者：
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影响因子：
2.8
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通讯作者：
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2000
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DOI：
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发表时间：
2011
期刊：
Bulletin of Mineralogy,Petrology and Geochemistry
影响因子：
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作者：
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通讯作者：
Wang Rucheng