粤琼海岸沙丘砂石英颗粒的表面结构特征

FEATURES OF QUARTZ GRAIN SURFACE TEXTURE OF COASTAL DUNE SAND ALONG GUANGDONG AND HAINAN PROVINCES

本文通过对广东和海南海岸沙丘砂石英颗粒的扫描电镜分析,认为其表面结构特征,既具有典型的风成环境特征.又有继承和改造了的海滩砂的特征.风成环境特征的机械撞击痕迹和化学作用痕迹都很明显.

Quartz grain surface textures in coastal dune sand which is mainly derived from beach sand have features characteristic of both typical aeolian environment and inheritable and reformable beach sand. Situated in the South Asian subtropical and tropical monsoon climate region,the coast along Guangdong and Hainnan Provinces has a wet and hot climate in the summer half-year so that it is favorable to chemical action marks developing on the surface of coastal dune quartz sand grains; but the coast has a dry climate dominared by the northeast monsoon winds and with strong wind-drift sand activity in the winter half-year,which causes lots of mechanical strike marks to occur on the grain surface.