摘要
海岸沙丘岩是由风沙沉积经碳酸盐胶结而成;其沉积结构和构造,具有典型的风成沉积特征.沙丘岩的胶结物为低镁方解石,胶结形态呈现出“新月型”接触胶结和重力型悬垂胶结特征,反映典型的大气淡水渗流带胶结特征.华南海岸沙丘岩有表层胶结和近岸胶结两个特点,是贝屑的淋溶、海水汽的浸润及沙丘表面强烈蒸发造成的.
Coast-dune-rocks are formed in deposits of wind-drift sands through, carbonate cementation and show typical features of wind-borne deposits in texture and structure. In these rocks, the cement is cakcite with low content of magnesium and the, contact cementation of crescent type and vertical cementations of gravity type are found, which indicate that the cementations develop in the vadose zone of meteorolo.gic water, The cementation concentrating, on the surface and near the shore is characteristic of the coast-dune-rocks in South China and is caused by eluviation of shell fragments, penetration of the vapour from see-water, and evaporation from the surface of sand dune,
出处
《华南师范大学学报（自然科学版）》
CAS
1990年第1期82-86,共5页
Journal of South China Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目
关键词
海岸沙丘岩
沉积构造
发育模式
全新世
华南
coastal dune rock
sedimentary structure
developing model
Holocenc
South China
