雷州半岛英峰岭剖面多期红土矿物学特征初步研究

雷州半岛英峰岭剖面多期红土矿物学特征初步研究＊文国高文启忠朱照宇徐义芳（中国科学院广州地球化学研究所，广州５１０６４０）关键词多期红土矿物学红土化雷州半岛我国南方热带－亚热带广泛发育的红土（包括红色风化壳和红色古土壤），记录了形成过程环境变迁的重要信...

A Preliminary Study of Mineral Characteristics of Multicyclic Red Soils in Yingfengling Section in Leizhou Peninsula

On the basis of geological surveys and measurement of field section,the mineral characteristics of the multicyclic red soil volcanic rock sequences were systematically studied at Yingfengling Ridge of Leizhou Peninsula,Guangdong Province by X ray diffraction The section contains 4 layers of red soils,the weathering eluvium of basalt or basaltic pyroclastic rocks.From bottom to top of the section, the mineral assemblages and the crystallinity are variant,for example,the first layer of red soil consist of montmorillonite(about 84.3%),but the second layer,the third layer and the fourth layer are mainly composed of kaolinite,the content of which is 67.3%, 77.8% and 86.0% respectively and the crystallinity is increscent progressively,reflecting the variations of the weathering time,lateritization process and paleo environment.