• 责任者：Nong Rizheng (Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration ; College of Earth Sciences ; Guilin University of Technology ; Guilin 541004 ; China) ; Li Rencheng
• 刊名：Carsologica Sinica
• 出版年：2013
• 卷期：32(1)
• 关键词：植物硅酸体 ; plant opal ; 古环境 ; paleoenvironment ; 广西 ; Guangxi Province
• 页码：p.23-28
• 图表：illus., 2 tables, 25 refs.
• 分类号：1400
• issnNo：ISSN1001-4810
• isbnNo：CN45-1157/P

Types, distribution and content of phytolith extracted from laterite developed on carbonate rock are analyzed quantitatively in Yanshan district, Guilin city, Guangxi. Some findings are shown as below, （1） Phytolith types are various in surface soil. The content of phytolith presents high values in modern soil, de- creases quickly from surface laterite down to bottom and becomes very little or absent at 20 cm deep. （2） No phytolith-rieh layers are found except in the surface soil （0--0.1 m） on the profile. （3） Influenced by leac- hing and bioturbation, phytolith in laterite developed on carbonate rocks can be transported downward with approximate 10-20 cm. However, phytolith translocation has no pronounced selectivity to their types and sizes and only has little effect on its assemblage in soil. The vegetation and climate recorded in phytolith as- semblages in laterite soils are well accorded with natural conditions in this area. （4） Surface laterite is the only phytolith enriched layer on the profile. This distribution character suggests phytolith transport from surface soil to bottom during the formation of laterite, which supports the view that the laterite originated by carbonate rock weathering. （5） The characteristics that transportation of phytolith having no pronounced se- lectivity to phytolith assemblage makes it possible to reconstruct paleoenvironments by analyzing phytolith data objectively.