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利用野外地质资料和室内分析资料，从成因类型和形成机理方面对盘车沟寒武系剖面中硅质层进行了研究。结果表明，镘头组下部的硅质层是同生期生物化学作用成因的，形成于潮下低能浅水环境；中、下寒武统与泥质共生的硅质层是成岩期呈分散状的硅质沉积物溶解、聚集、交代成因的。在硅质形成过程中，粘土矿物对ＳｉＯ２胶体质点起着吸附和提供部分氧化硅的作用。张夏组顶部硅质层是经过白云岩化作用之后交代成因的。
Based on the field geological data and indoor analysis data, the siliceous layers in the Cambrian section of Panchicou are studied from the genetic types and formation mechanisms. The results show that the siliceous layer in the lower part of the Yuantou Formation is the genesis of syngenetic biochemistry and is formed in low-energy and shallow-water environment. The siliceous layers symbiotic with the Lower Cambrian and muddy sedimentary are distributed in the diagenetic stage Silica sediments dissolved, aggregated, account for the cause. During the formation of siliceous minerals, clay minerals play a role in adsorbing SiO2 colloidal particles and providing partial silicon oxide. The top siliceous layer of Zhangxia Formation is explained by dolomitization.