【摘要】 我国南方晚震旦世广泛发育有包括叠层石、层纹石和核形石等组成的微生物岩， 其中以叠层石最为普遍； 黔中地区的磷质叠层石总体上以层礁产出为特点， 其中的藻类微生物化石已被确定的有丝状和球状两大类共１７ 个种属， 而细菌微生物参与成岩成矿作用的证据也常能见到。微生物岩中的磷质主要富集在叠层石的柱体部位， 特别是富集在柱体的富藻纹层中； 从微生物的矿化特点看， 其成矿作用可分为直接的和间接的两种不同机制的类型。与同期形成的碳酸盐叠层石相比， 磷质叠层石， 无论在种类的多样性或发育程度上都显得丰富多彩得多， 这可能与磷质叠层石所处的有利环境， 特别是对营造叠层石的微生物的生长所需的富磷水介质环境密切相关。更多还原

【Abstract】 In South China, the Late Sinian microbiolite (stromatolite, stratifera and oncolite etc ) are widely developed Among them, the stromatolite is importent And, at central Guizhou, the phosphatic stromatolite horizons have occurrences of bio reefs The algae fossils found in phosphatic stromatolite have been identified It is concluded that there are two major groups, i e filamentary and spharical algae, and 17 species totally The P 2O 5 contens of those microbiolite are enriched mostly in the column of phosphatic stromatolite, and specifically in algae rich layers of stromatolite columns or strafera From the mineralization characteristics of microbiolite, the biomineralization may be divided in to two types, e t direct and indirect effects of organisms Comparing with simultaneously formed carbonate stomatolites, the phosphatic stromatolites consist of much complex, and diverse species and are well developed We ascribed this to the favorable environment for development of phosphatic stromatolites, especially to a phosphorus rich water condition which was necessary for growth of phosphatic stromatolites forming microbial更多还原