微生物碳酸盐岩沉积学研究进展--基于第33届国际沉积学会议的综述

第33届国际沉积学会议于2017年10月9日-12日在法国图卢兹召开，微生物碳酸盐岩专题受到持续关注。在总结会议成果基础上，结合近年来国内外微生物沉积学文献以及现代微生物碳酸盐岩沉积考察，分析了微生物碳酸盐岩沉积学研究前沿及进展，包括:1）微生物席矿化产物及序列，认为矿化产物包括方解石（低Mg、高Mg、超高Mg）、文石、含铁、锰和钙的碳酸盐岩，镁-硅和黄铁矿等产物，矿化序列多样。2）微生物碳酸盐岩的元素记录，其中碳、氧、氮、磷、硫、铁、硅、砷等元素及同位素特征可能保留了微生物碳酸盐岩沉积和早期成岩的信息。3）纹层、凝块等微生物碳酸盐岩沉积结构机理及指示意义。4）微生物碳酸盐岩沉积环境，认为潮坪环境，特别是平均低潮面附近及其以上叠层石灰岩、凝块岩等微生物碳酸盐岩最为发育。依据国际微生物碳酸盐岩沉积学发展特点，本文针对国内相关领域进一步探讨了研究趋向，提出分类认识微生物碳酸盐岩现代沉积机理、重建古老微生物碳酸盐岩早期成岩过程、分类认识古老微生物碳酸盐岩沉积标志，这在当今微生物碳酸盐岩沉积学研究中显得尤为必要。

Research P rogress in Sedimentology of Microbial Carbonate Rocks: A re-view based on the 33rd International Sedimentological Cong ress

The 33rd International Sedimentological Congress was held in Toulouse, France from 9th to 12th, October, 2017, continuously concerning on the topics of microbial carbonate rocks. Based on the summarizing outcome of the conference combined with related domestic and international literatures in recent years and also field investigations on modern microbial carbonate sediments, some research progress and hot spots were investigated and discussed for microbial carbonate sedimentology in this paper. The primarily concerned topics include the following four fields:1) Microbial mat mineralization products and sequences, of which the mineralized products include calcite (low Mg, high Mg, ultra high Mg), aragonite, carbonates containing iron, manganese and calcium, products of magnesium-silicon and pyrite. The mineralization sequences are diverse. 2) Elemental records of the microbial carbonate, in which carbon, oxygen, nitrogen, phosphorus, sulfur, iron, silicon and arsenic may retain the information about the microbial sedimentary carbonate and early diagenesis. 3) The structures mechanism and their significance for the microorganism carbonate rocks such as laminates and clots. 4) the sedimentary environments of microbial carbonates. It is considered that the stromatolite, clot rock and other microbial carbonate rocks are mostly developed in the tidal flat environment, especially the shallow subtidal zone and the upper layers of stromatolitic limestone and clotting rocks. According to the internationally developing characteristics of microbial carbonate sedimentology, the research trend in related fields in China is further discussed in this paper. It is necessary to strengthen the research on the current microbial carbonate sediments and the diagenesis of ancient microbial carbonate rocks.