中文摘要：

微生物的钙化机理是当今微生物碳酸盐岩研究的热点。微观条件下，在豫西寒武纪碳酸盐岩叠层石中发现了大量微生物化石，形态特征明显，为典型蓝细菌属的丝状葛万菌（Girvanella）和球状肾形菌（Renalcis）。根据豫西寒武纪叠层石明暗纹层中微生物化石的赋存状态及相关化石证据，可以判断叠层石的钙化分为微生物的物理和化学2种作用方式，其中物理钙化有2种钙化途径，而化学钙化又有化学诱导和化学控制2种钙化模式和多种钙化途径。在扫描电镜下能够清晰地看到各种钙化方式的结果和微生物主动营造作用所留下的证据，即磨圆度较低的颗粒物和深色灰泥等。结果表明叠层石的有机成因和水动力条件对其钙化方式具有重要影响。

英文摘要：

Microbial calcification has become a hot topic of the study on microbial carbonate rocks.In the micro,abundant microbial fossils were discovered in Cambrian carbonate stromatolites of western Henan,which are Girvanella and Renalcis of Cyanobacteria with filamentous and spherical features.According to the state of microbial fossils in laminated stromatolites and related fossil evidence in western Henan, the Cambrian stromatolites＇calcification is of microbial interaction,including physical calcification and chemical calcification. The physical calcification includes 2 calcification pathways,and the chemical calcification includes chemical in-ducing and chemical control or more calcification pathways.The result of various calcification and the evidence caused by microbial initiative building effect can be clearly seen by using SEM,which are lower psephicity par-ticles and dark stucco,etc..The results show that the stromatolites＇organic genesis and the hydrodynamic con-dition are important factors affecting calcification way of those stromatolites.