CAJ | 학술논문

鲁西地区寒武纪地层分布广泛、出露连续，中寒武世张夏组和晚寒武世炒米店组均有凝块石产出。本文通过对该地区凝块石的野外观察和镜下鉴定，认为形成凝块石的微生物主要为附枝菌，其次是葛万菌、肾球菌和放射状菌，根据枝杈的直径大小、枝杈的细胞状分割结构及结晶程度等，附枝菌又可细分为：泥晶粗枝杈状、泥晶分段枝杈状、泥晶细枝杈状、微晶管状枝杈状和亮晶粗枝杈状。相应的群落也可划分为：泥晶树枝状、单个房室状、簇球状和亮晶树枝状。凝块石的凝块为附枝菌等蓝细菌钙化体和周围粘结的碳酸盐微粒所组成的团块，其按形态可分为：斑状、网状和树枝状。根据上述的研究，本文认为形成凝块石的理想过程可以分为4个阶段：蓝细菌的捕捉和粘结作用、蓝细菌自身钙化作用、碳酸盐的原地沉淀和沉积后作用。
로서지구한무기지층분포엄범、출로련속，중한무세장하조화만한무세초미점조균유응괴석산출。본문통과대해지구응괴석적야외관찰화경하감정，인위형성응괴석적미생물주요위부지균，기차시갈만균、신구균화방사상균，근거지차적직경대소、지차적세포상분할결구급결정정도등，부지균우가세분위：니정조지차상、니정분단지차상、니정세지차상、미정관상지차상화량정조지차상。상응적군락야가화분위：니정수지상、단개방실상、족구상화량정수지상。응괴석적응괴위부지균등람세균개화체화주위점결적탄산염미립소조성적단괴，기안형태가분위：반상、망상화수지상。근거상술적연구，본문인위형성응괴석적이상과정가이분위4개계단：람세균적포착화점결작용、람세균자신개화작용、탄산염적원지침정화침적후작용。
Cambrian strata spread widely and expose continuously in the West of Shandong Province, andthrombolite develop in the Zhangxia formation and Chaomidian formation. The result of field observations and microscopic identifications shows that thrombolite of this area is mainly composed of Epiphyton bonding and capturing carbonate particles,followed by Girvanella,Renalcis ,Actinophycus. According to the size of branches,existence of cell-like segments,and degree of crystallization,Epiphyton can be divided into five types,micrite bifurcating rodlike branches (75 ~ 80μm ),micrite segmented branches (~80μm),micrite bifurcating fine branches (40~60μm),crystallite tubular branches (<40μm) and sparry bifurcating rodlike branches (~ 75μm).And corresponding thallus can be divided into four types,micrite bush shaped,single chambered,cluster chambered,sparry bush shaped.Under the microscope,the clot is a mass which is formed by calcified bodies of cyanobacteria such as Epiphyton and bonding carbonate particles.According to its morphology,it is divided into the clotted,meshed and dendritic.In summary,all the above reveal that formation of thrombolite include four stages:capturing and bonding of cyanobacteria, calcification of cyanobacteria, carbonate deposition in situ, and postdeposition.